{"id":173,"date":"2024-09-18T18:25:23","date_gmt":"2024-09-18T10:25:23","guid":{"rendered":"https:\/\/www.zackzzp.top\/?p=173"},"modified":"2024-10-21T20:59:50","modified_gmt":"2024-10-21T12:59:50","slug":"java%e9%9d%a2%e7%bb%8f","status":"publish","type":"post","link":"http:\/\/www.zackzzp.top\/index.php\/2024\/09\/18\/java%e9%9d%a2%e7%bb%8f\/","title":{"rendered":"java\u9762\u7ecf\u6574\u7406"},"content":{"rendered":"\n<div class=\"wp-block-media-text is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='http:\/\/www.zackzzp.top\/wp-content\/uploads\/2024\/09\/DSC00216-1024x697.jpg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"697\" data-original=\"http:\/\/www.zackzzp.top\/wp-content\/uploads\/2024\/09\/DSC00216-1024x697.jpg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-170 size-full\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure><div class=\"wp-block-media-text__content\">\n<p>\u7406\u89e3\u539f\u7406\uff0c\u5efa\u7acb\u94fe\u63a5<\/p>\n<\/div><\/div>\n\n\n<h2><a href=\"https:\/\/blog.csdn.net\/s13073660520\/article\/details\/126719777?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522F6E0DA87-5C39-41B6-82BB-749802D60BE1%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&amp;request_id=F6E0DA87-5C39-41B6-82BB-749802D60BE1&amp;biz_id=0&amp;utm_medium=distribute.pc_search_result.none-task-blog-2~all~top_positive~default-1-126719777-null-null.142^v100^pc_search_result_base4&amp;utm_term=java%20optional%E7%B1%BB&amp;spm=1018.2226.3001.4187\">\u5173\u4e8eoptional\u7c7b<\/a><\/h2>\n<p>optional\u63d0\u4f9b\u4e86\u4e00\u4e9b\u65b9\u6cd5\u53bb\u5904\u7406\u7a7a\u503c\uff0c\u6765\u5e2e\u52a9\u6211\u4eec\u7b80\u5316\u4e1a\u52a1\u4ee3\u7801\u4e2d\u7a7a\u503c\u7684\u5224\u65ad<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2><a href=\"https:\/\/blog.csdn.net\/weixin_38244174\/article\/details\/131820053?ops_request_misc=%257B%2522request%255Fid%2522%253A%252250F0F57A-7513-41BC-BACE-3BFEFCC85B18%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&amp;request_id=50F0F57A-7513-41BC-BACE-3BFEFCC85B18&amp;biz_id=0&amp;utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-1-131820053-null-null.142^v100^pc_search_result_base4&amp;utm_term=java%20%E8%87%AA%E5%8A%A8%E5%86%85%E5%AD%98%E7%AE%A1%E7%90%86%E6%9C%BA%E5%88%B6&amp;spm=1018.2226.3001.4187\">java\u81ea\u52a8\u5185\u5b58\u7ba1\u7406\u673a\u5236<\/a><\/h2>\n<p>\u7531\u4e8ejvm\u7684\u5b58\u5728\uff0c\u4f7f\u5f97java\u7684\u5185\u5b58\u5206\u914d\uff0c\u76f8\u6bd4c++\u8981\u5bb9\u6613\u5f97\u591a\uff0c<\/p>\n<p>java\u7684\u81ea\u52a8\u5185\u5b58\u7ba1\u7406\u673a\u5236\uff0c\u5185\u5b58\u7ba1\u7406\uff0c\u4e2a\u4eba\u7406\u89e3\u5373\u5bf9\u8c61\u7684\u521b\u5efa\u4e0e\u56de\u6536\uff0c<\/p>\n<p>\u5728\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u8c03\u7528\u65b9\u6cd5\u533a\u7684\u65b9\u6cd5\uff0c\u5c06\u5bf9\u8c61\u521b\u5efa\u5728java\u5806\u4e2d\uff0c<\/p>\n<p>\u5bf9\u4e8e\u7ebf\u7a0b\uff0cjvm\u4e2d\u6709\u4e13\u95e8\u7684\u533a\u57df\uff08java\u865a\u62df\u673a\u6808\uff0c\u672c\u5730\u65b9\u6cd5\u6808\uff0c\u7a0b\u5e8f\u8ba1\u6570\u5668\uff09\uff0c\u8fd9\u4e2a\u533a\u57df\u968f\u7ebf\u7a0b\u521b\u5efa\u800c\u751f\uff0c<\/p>\n<p>\u968f\u7ebf\u7a0b\u7ed3\u675f\u800c\u4ea1\u3002<\/p>\n<p>\u5bf9\u4e8e\u5bf9\u8c61\u7684\u521b\u5efa\uff0cjvm\u6709\u65b0\u751f\u4ee3\u548c\u8001\u5e74\u4ee3\u4e4b\u5206\uff0c\u65b0\u751f\u4ee3\u7684\u5b58\u50a8\u8bbe\u6709Eden\u548csurvial\u533a\uff0c\u901a\u8fc7\u591a\u6b21\u7684GC\uff08\u5783\u573e\u56de\u6536\u7ebf\u7a0b\uff09\uff0c\u65b0\u751f\u4ee3\u7684\u5e74\u9f84\u4f1a\u9010\u6e10\u5347\u9ad8\uff0c\u7136\u540e\u88ab\u8f6c\u79fb\u5230\u8001\u5e74\u4ee3\u533a\uff0c<\/p>\n<p>\u5bf9\u4e8e\u5bf9\u8c61\u7684\u56de\u6536\uff0cjvm\u4e2d\u6709\u5783\u573e\u56de\u6536\u5668\u8d1f\u8d23\uff0c\u8fd9\u4f1a\u6d89\u53ca\u5230\u4e00\u4e9b\u5783\u573e\u56de\u6536\u7b97\u6cd5\uff0c\u4f8b\u5982\uff1a\u6807\u8bb0-\u6e05\u9664\u6cd5\uff0c\u6807\u8bb0-\u6574\u7406\u6cd5\uff0c\u590d\u5236\u6cd5\u3002<\/p>\n<p>\u6d89\u53ca\u5230\u5783\u573e\u56de\u6536\u7b97\u6cd5\u7684\u5b9e\u73b0\uff0c\u4f1a\u6709\u4e00\u4e9b\u5783\u573e\u56de\u6536\u5668\uff0c\u4f8b\u5982Serial\uff0cParNew\uff08Serial\u7684\u591a\u7ebf\u7a0b\u7248\u672c\uff09\uff0cParallel Scavenge\/Parallel Old\u6536\u96c6\u5668\uff0c\u8fd8\u6709CMS\u6536\u96c6\u5668\u7b49\u7b49\u3002<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>Java IO\u6d41<\/p>\n<\/h2>\n<p>\u5173\u4e8e\u8f93\u5165\u548c\u8f93\u51fa\u6d41\uff0cinputstream\u548coutputstream\uff0c\u8c03\u7528\u8fd9\u4e24\u4e2a\u7c7b\u7684\u65f6\u5019\uff0c\u5b9e\u9645\u4e0a\u662f\u5efa\u7acb\u4e86\u4e00\u4e2a\u94fe\u63a5\uff0c<\/p>\n<p>\u7136\u540e\u518d\u5b9e\u73b0\u8f93\u5165\u548c\u8f93\u51fa<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2><a href=\"https:\/\/blog.csdn.net\/weixin_61015911\/article\/details\/130243021?ops_request_misc=%257B%2522request%255Fid%2522%253A%25226C272861-9359-48CE-8A97-628F483EB90B%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&amp;request_id=6C272861-9359-48CE-8A97-628F483EB90B&amp;biz_id=0&amp;utm_medium=distribute.pc_search_result.none-task-blog-2~all~top_click~default-2-130243021-null-null.142^v100^pc_search_result_base4&amp;utm_term=B%E6%A0%91&amp;spm=1018.2226.3001.4187\">B\u6811\u548cB+\u6811<\/a><\/h2>\n<p>B\u6811\u548cB+\u6811\u975e\u5e38\u9002\u5408\u505a\u6570\u636e\u5e93\u7684\u7d22\u5f15<\/p>\n<p>B\u6811\u7684\u7279\u5f81\uff1a<\/p>\n<p>\u6839\u8282\u70b9\u81f3\u5c11\u6709\u4e24\u4e2a\u5b50\u8282\u70b9\u3002<br \/>\u6bcf\u4e2a\u4e2d\u95f4\u8282\u70b9\u90fd\u5305\u542bk-1\u4e2a\u5143\u7d20\uff08\u4e5f\u88ab\u79f0\u4e3a\u5173\u952e\u5b57\uff09\u548ck\u4e2a\u5b69\u5b50\uff0c\u5176\u4e2dm\/2 &lt;= k &lt;= m\u3002<br \/>\u6bcf\u4e00\u4e2a\u53f6\u5b50\u8282\u70b9\u90fd\u5305\u542bk-1\u4e2a\u5143\u7d20\uff0c\u5176\u4e2dm\/2 &lt;= k &lt;= m\u3002<br \/>\u6240\u6709\u7684\u53f6\u5b50\u8282\u70b9\u90fd\u4f4d\u4e8e\u540c\u4e00\u5c42\u3002<br \/>\u6bcf\u4e2a\u8282\u70b9\u4e2d\u7684\u5143\u7d20\u4ece\u5c0f\u5230\u5927\u6392\u5217\uff0c\u8282\u70b9\u5f53\u4e2dk-1\u4e2a\u5143\u7d20\u6b63\u597d\u662fk\u4e2a\u5b69\u5b50\u5305\u542b\u7684\u5143\u7d20\u7684\u503c\u57df\u5206\u5212\u3002<\/p>\n<\/p>\n<p>B+\u6811\u662fB\u6811\u7684\u5347\u7ea7\uff0c\u89e3\u51b3\u4e86B\u6811\u8fdb\u884c\u8303\u56f4\u67e5\u8be2\u6548\u7387\u4f4e\u7684\u95ee\u9898<\/p>\n<\/p>\n<p>B+\u6811\u7279\u5f81\uff1a<\/p>\n<p>\u6709k\u4e2a\u5b50\u6811\u7684\u4e2d\u95f4\u8282\u70b9\u5305\u542bk\u4e2a\u5143\u7d20\uff08B\u6811\u4e2d\u662fk-1\u4e2a\u5143\u7d20\uff09\uff0c\u6bcf\u4e2a\u5143\u7d20\u4e0d\u4fdd\u5b58\u6570\u636e\uff0c\u6240\u6709\u6570\u636e\u90fd\u4fdd\u5b58\u5728\u53f6\u5b50\u8282\u70b9\u3002<br \/>\u6240\u6709\u7684\u53f6\u5b50\u8282\u70b9\u5305\u542b\u4e86\u5168\u90e8\u5143\u7d20\uff0c\u4f9d\u7167\u5143\u7d20\u7684\u5927\u5c0f\u5347\u5e8f\u6392\u5217\uff0c\u53f6\u5b50\u8282\u70b9\u4e4b\u95f4\u7528\u53cc\u5411\u6307\u9488\u76f8\u8fde\u63a5\u3002<br \/>\u6240\u6709\u4e2d\u95f4\u8282\u70b9\u7684\u5143\u7d20\u90fd\u540c\u65f6\u5b58\u5728\u4e8e\u5b50\u8282\u70b9\uff0c\u5728\u5b50\u8282\u70b9\u5143\u7d20\u4e2d\u662f\u6700\u5927\uff08\u6216\u6700\u5c0f\uff09\u5143\u7d20\u3002<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2><a href=\"https:\/\/blog.csdn.net\/cy973071263\/article\/details\/122543826?ops_request_misc=%257B%2522request%255Fid%2522%253A%252275354D21-AD87-43DC-A039-27D9A2124D46%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&amp;request_id=75354D21-AD87-43DC-A039-27D9A2124D46&amp;biz_id=0&amp;utm_medium=distribute.pc_search_result.none-task-blog-2~all~top_positive~default-1-122543826-null-null.142^v100^pc_search_result_base4&amp;utm_term=%E7%BA%A2%E9%BB%91%E6%A0%91&amp;spm=1018.2226.3001.4187\">\u7ea2\u9ed1\u6811<\/a><\/h2>\n<p>\u7ea2\u9ed1\u6811\u4e5f\u662f\u81ea\u5e73\u8861\u7684\u4e8c\u53c9\u67e5\u627e\u6811\uff0c\u4ed6\u7684\u641c\u7d22\u63d2\u5165\u5220\u9664\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u90fd\u4e3ao\uff08logn\uff09<\/p>\n<p>\u7ea2\u9ed1\u6811\u7684\u51fa\u73b0\u662f\u4e3a\u4e86\u89e3\u51b3\u975e\u5e73\u8861\u4e8c\u641c\u7d22\u6811\u7684\u6548\u7387\u4f4e\u7684\u95ee\u9898\u3002<\/p>\n<p>\u7ea2\u9ed1\u6811\u76845\u4e2a\u6027\u8d28\uff1a<\/p>\n<p>1.\u8282\u70b9\u662f\u7ea2\u8272\u6216\u9ed1\u8272<br \/>2.\u6839\u662f\u9ed1\u8272<br \/>3.\u53f6\u5b50\u8282\u70b9\uff08\u5916\u90e8\u8282\u70b9\uff0c\u7a7a\u8282\u70b9\uff09\u90fd\u662f\u9ed1\u8272\uff0c\u8fd9\u91cc\u7684\u53f6\u5b50\u8282\u70b9\u6307\u7684\u662f\u6700\u5e95\u5c42\u7684\u7a7a\u8282\u70b9\uff08\u5916\u90e8\u8282\u70b9\uff09\uff0c\u4e0b\u56fe\u4e2d\u7684\u90a3\u4e9bnull\u8282\u70b9\u624d\u662f\u53f6\u5b50\u8282\u70b9\uff0cnull\u8282\u70b9\u7684\u7236\u8282\u70b9\u5728\u7ea2\u9ed1\u6811\u91cc\u4e0d\u5c06\u5176\u770b\u4f5c\u53f6\u5b50\u8282\u70b9<br \/>4.\u7ea2\u8272\u8282\u70b9\u7684\u5b50\u8282\u70b9\u90fd\u662f\u9ed1\u8272<br \/>\u00a0 \u00a0 \u00a04.1\u7ea2\u8272\u8282\u70b9\u7684\u7236\u8282\u70b9\u90fd\u662f\u9ed1\u8272\u00a0<br \/>\u00a0 \u00a0 \u00a04.2\u4ece\u6839\u8282\u70b9\u5230\u53f6\u5b50\u8282\u70b9\u7684\u6240\u6709\u8def\u5f84\u4e0a\u4e0d\u80fd\u6709 2 \u4e2a\u8fde\u7eed\u7684\u7ea2\u8272\u8282\u70b9<br \/>5.\u4ece\u4efb\u4e00\u8282\u70b9\u5230\u53f6\u5b50\u8282\u70b9\u7684\u6240\u6709\u8def\u5f84\u90fd\u5305\u542b\u76f8\u540c\u6570\u76ee\u7684\u9ed1\u8272\u8282\u70b9<\/p>\n<p>\u7ea2\u9ed1\u6811\u7684\u95ee\u9898\u53ef\u4ee5\u7b49\u4ef7\u4e3a\u56db\u9636B\u6811\u3002<\/p>\n<p>\u7ea2\u9ed1\u6811\u548cAVL\u6811\u7684\u6bd4\u8f83\uff1a<\/p>\n<p>1.\u5728\u5e73\u8861\u6027\u65b9\u9762<\/p>\n<p>AVL\u5bf9\u5e73\u8861\u6027\u7684\u8981\u6c42\u5f88\u4e25\u683c\uff0c\u8981\u6c42\u9ad8\u5ea6\u5dee\u4e0d\u80fd\u8d85\u8fc71\uff0c\u662f\u4e00\u79cd\u5f3a\u5e73\u8861<\/p>\n<p>\u7ea2\u9ed1\u6811\u901a\u8fc7\u81ea\u8eab\u76845\u6761\u6027\u8d28\uff0c\u4e0e\u56db\u9636B\u6811\u7b49\u4ef7\uff0c\u56e0\u4e3aB\u6811\u662f\u77ee\u6811\uff0c\u8fd9\u6837\u7ea2\u9ed1\u6811\u5c31\u4fdd\u8bc1\u4e86\u8fd9\u4e2a\u6811\u4e0d\u4f1a\u592a\u9ad8\uff0c<\/p>\n<p>\u5728\u5e73\u8861\u6807\u51c6\u4e0a\uff0c\u7ea2\u9ed1\u6811\u8981\u6c42\u6ca1\u6709\u4e00\u6761\u8def\u5f84\u4f1a\u5927\u4e8e\u5176\u4ed6\u8def\u5f84\u7684\u4e24\u500d\uff0c\u8fd9\u4e2a\u6807\u51c6\u8f83\u4e3a\u5bbd\u677e\uff0c\u662f\u5f31\u5e73\u8861\uff0c<\/p>\n<p>\u4e5f\u662f\u9ed1\u9ad8\u5ea6\uff08\u6bcf\u6761\u8def\u5f84\u9ed1\u8282\u70b9\u6570\u91cf\u76f8\u540c\uff09\u5e73\u8861<\/p>\n<p>2.\u5728\u6027\u80fd\u65b9\u9762<\/p>\n<p>\u7ea2\u9ed1\u6811\u6027\u80fd\u5e73\u5747\u6765\u770b\u8981\u4f18\u4e8eAVL\u6811\uff0c<\/p>\n<p>\u7ea2\u9ed1\u6811\u7684\u63d2\u5165\u5220\u9664\u6240\u8981\u8fdb\u884c\u7684\u65cb\u8f6c\u64cd\u4f5c\u90fd\u662fO\uff081\uff09\u6b21\uff0c<\/p>\n<p>AVL\u6811\u4f1a\u6709\u6781\u7aef\u60c5\u51b5\uff0c\u5220\u9664\u4f1a\u6700\u591a\u9700\u8981O\uff08logn\uff09\u6b21\u8c03\u6574\u3002<\/p>\n<p>\u5173\u4e8e\u5982\u4f55\u9009\u62e9\uff1a<\/p>\n<p>\u641c\u7d22\u7684\u6b21\u6570\u8fdc\u8fdc\u5927\u4e8e\u63d2\u5165\u548c\u5220\u9664\uff0c\u9009\u62e9AVL\u6811\uff1b\u641c\u7d22\u3001\u63d2\u5165\u3001\u5220\u9664\u6b21\u6570\u51e0\u4e4e\u5dee\u4e0d\u591a\uff0c\u9009\u62e9\u7ea2\u9ed1\u6811<\/p>\n<p>\u76f8\u5bf9\u4e8eAVL\u6811\u6765\u8bf4\uff0c\u7ea2\u9ed1\u6811\u727a\u7272\u4e86\u90e8\u5206\u5e73\u8861\u6027\u4ee5\u6362\u53d6\u63d2\u5165\/\u5220\u9664\u64cd\u4f5c\u65f6\u5c11\u91cf\u7684\u65cb\u8f6c\u64cd\u4f5c\uff0c\u6574\u4f53\u6765\u8bf4\u6027\u80fd\u8981\u4f18\u4e8eAVL\u6811<\/p>\n<p>\u7ea2\u9ed1\u6811\u7684\u5e73\u5747\u7edf\u8ba1\u6027\u80fd\u4f18\u4e8eAVL\u6811\uff0c\u5b9e\u9645\u5e94\u7528\u4e2d\u66f4\u591a\u9009\u62e9\u4f7f\u7528\u7ea2\u9ed1\u6811<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2><a href=\"https:\/\/blog.csdn.net\/m0_67544708\/article\/details\/130380497?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522CC205A1B-DFD2-439F-AD98-23F39105774E%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&amp;request_id=CC205A1B-DFD2-439F-AD98-23F39105774E&amp;biz_id=0&amp;utm_medium=distribute.pc_search_result.none-task-blog-2~all~top_positive~default-1-130380497-null-null.142^v100^pc_search_result_base4&amp;utm_term=%E5%88%86%E5%BA%93%E5%88%86%E8%A1%A8&amp;spm=1018.2226.3001.4187\">\u5173\u4e8e\u5206\u5e93\u5206\u8868<\/a><\/h2>\n<ol>\n<li>\u4ec0\u4e48\u662f\u5206\u5e93\u5206\u8868<br \/>\u968f\u7740\u5e94\u7528\u4e0d\u65ad\u53d1\u5c55\uff0c\u6570\u636e\u91cf\u4e0d\u65ad\u589e\u5927\uff0c\u5355\u8868\u5355\u5e93\u67e5\u8be2\u6548\u7387\u6301\u7eed\u4f4e\u4e0b\u800c\u884d\u751f\u51fa\u7684\u6280\u672f\u65b9\u6848<\/li>\n<li>\u4e3a\u4ec0\u4e48\u5206\u5e93<br 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-&gt;MySQL\uff0c\u53ef\u80fd\u5bfc\u81f4\u6027\u80fd\u6709\u4e00\u4e9b\u635f\u8017\uff0c\u4f46\u4e24\u8005\u5dee\u8ddd\u5e76\u4e0d\u662f\u975e\u5e38\u5927\u3002<\/p>\n<p>2\u3001\u590d\u6742\u5ea6<\/p>\n<p>client \u6a21\u5f0f\u5728\u5f00\u53d1\u4f7f\u7528\u901a\u5e38\u5f15\u5165\u4e00\u4e2a jar \u53ef\u4ee5\uff1b proxy \u4ee3\u7406\u6a21\u5f0f\u5219\u9700\u8981\u642d\u5efa\u5355\u72ec\u7684\u670d\u52a1\uff0c\u6709\u4e00\u5b9a\u7684\u7ef4\u62a4\u6210\u672c\uff0c\u65e2\u7136\u662f\u670d\u52a1\u90a3\u4e48\u5c31\u8981\u8003\u8651\u9ad8\u53ef\u7528\uff0c\u6bd5\u7adf\u5e94\u7528\u7684\u6240\u6709 SQL \u90fd\u8981\u901a\u8fc7\u5b83\u8f6c\u53d1\u81f3 MySQL\u3002<\/p>\n<p>3\u3001\u5347\u7ea7<\/p>\n<p>client \u6a21\u5f0f\u5206\u5e93\u5206\u8868\u4e00\u822c\u662f\u4f9d\u8d56\u57fa\u7840\u67b6\u6784\u56e2\u961f\u7684 Jar \u5305\uff0c\u4e00\u65e6\u6709\u7248\u672c\u5347\u7ea7\u6216\u8005 Bug \u4fee\u6539\uff0c\u6240\u6709\u5e94\u7528\u5230\u7684\u9879\u76ee\u90fd\u8981\u8ddf\u7740\u5347\u7ea7\u3002\u5c0f\u89c4\u6a21\u7684\u56e2\u961f\u670d\u52a1\u5c11\u5347\u7ea7\u95ee\u9898\u4e0d\u5927\uff0c\u5982\u679c\u662f\u5927\u516c\u53f8\u670d\u52a1\u89c4\u6a21\u5927\uff0c\u4e14\u6d89\u53ca\u5230\u8de8\u591a\u90e8\u95e8\uff0c\u90a3\u4e48\u5347\u7ea7\u4e00\u6b21\u6210\u672c\u5c31\u6bd4\u8f83\u9ad8\uff1b<\/p>\n<p>proxy \u6a21\u5f0f\u5728\u5347\u7ea7\u65b9\u9762\u4f18\u52bf\u5f88\u660e\u663e\uff0c\u53d1\u5e03\u65b0\u529f\u80fd\u6216\u8005\u4fee\u590d Bug\uff0c\u53ea\u8981\u91cd\u65b0\u90e8\u7f72\u4ee3\u7406\u670d\u52a1\u96c6\u7fa4\u5373\u53ef\uff0c\u4e1a\u52a1\u65b9\u662f\u65e0\u611f\u77e5\u7684\uff0c\u4f46\u8981\u4fdd\u8bc1\u53d1\u5e03\u8fc7\u7a0b\u4e2d\u670d\u52a1\u7684\u53ef\u7528\u6027\u3002<\/p>\n<p>4\u3001\u6cbb\u7406\u3001\u76d1\u63a7<\/p>\n<p>client \u6a21\u5f0f\u7531\u4e8e\u662f\u5185\u5d4c\u5728\u5e94\u7528\u5185\uff0c\u5e94\u7528\u96c6\u7fa4\u90e8\u7f72\u4e0d\u592a\u65b9\u4fbf\u7edf\u4e00\u5904\u7406\uff1bproxy \u6a21\u5f0f\u5728\u5bf9 SQL \u9650\u6d41\u3001\u8bfb\u5199\u6743\u9650\u63a7\u5236\u3001\u76d1\u63a7\u3001\u544a\u8b66\u7b49\u670d\u52a1\u6cbb\u7406\u65b9\u9762\u66f4\u4f18\u96c5\u4e00\u4e9b\u3002<\/p>\n<\/li>\n<\/ol>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>MVCC\u548c\u4e09\u9501<\/h2>\n<p><a href=\"https:\/\/blog.csdn.net\/Mrxiao_bo\/article\/details\/136287780?ops_request_misc=&amp;request_id=&amp;biz_id=102&amp;utm_term=Next-Key%20Locks&amp;utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduweb~default-2-136287780.142^v100^pc_search_result_base4&amp;spm=1018.2226.3001.4187\">\u4e86\u89e3mvcc\u524d\u5148\u8ba4\u8bc6\u4e09\u9501\uff08\u90bb\u952e\u9501\uff0c\u95f4\u9699\u9501\uff0c\u8bb0\u5f55\u9501\uff09<\/a><\/p>\n<ul>\n<li>\u90bb\u952e\u9501\uff1a\u884c\u7ea7\u9501\uff08\u5373\u9501\u5b9a\u8868\u7684\u884c\u800c\u4e0d\u662f\u6574\u4e2a\u8868\uff09\u7684\u4e00\u79cd\uff0c\u9501\u5b9a\u7684\u884c\u6570\u5de6\u5f00\u53f3\u95ed<\/li>\n<li>\u95f4\u9699\u9501\uff1a\u4e5f\u662f\u884c\u7ea7\u9501\uff0c\u9501\u5b9a\u884c\u6570\u5de6\u5f00\u53f3\u5f00<\/li>\n<li>\u8bb0\u5f55\u9501\uff1a\u9501\u5b9a\u4e00\u6761\u8bb0\u5f55\uff0c\u5373\u4e00\u884c<\/li>\n<\/ul>\n<p><a href=\"https:\/\/blog.csdn.net\/yzx3105\/article\/details\/129675468?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522C5341376-AE35-4A7A-A10B-A7BECA5ADA2C%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&amp;request_id=C5341376-AE35-4A7A-A10B-A7BECA5ADA2C&amp;biz_id=0&amp;utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduend~default-1-129675468-null-null.142^v100^pc_search_result_base4&amp;utm_term=Next-Key%20Locks&amp;spm=1018.2226.3001.4187\">\u4e09\u9501\u5728\u4e0d\u540c\u67e5\u8be2\u6761\u4ef6\u7684\u52a0\u9501\u60c5\u51b5<\/a><\/p>\n<p>\u552f\u4e00\u7d22\u5f15\u7b49\u503c\u67e5\u8be2\uff1a<br \/>1.\u5f53\u67e5\u8be2\u7684\u8bb0\u5f55\u662f\u5b58\u5728\u7684\uff0cnext-key lock \u4f1a\u9000\u5316\u6210\u300c\u8bb0\u5f55\u9501\u300d\u3002<br \/>2.\u5f53\u67e5\u8be2\u7684\u8bb0\u5f55\u662f\u4e0d\u5b58\u5728\u7684\uff0cnext-key lock \u4f1a\u9000\u5316\u6210\u300c\u95f4\u9699\u9501\u300d\u3002<\/p>\n<p>\u975e\u552f\u4e00\u7d22\u5f15\u7b49\u503c\u67e5\u8be2\uff1a<br \/>1.\u5f53\u67e5\u8be2\u7684\u8bb0\u5f55\u5b58\u5728\u65f6\uff0c\u9664\u4e86\u4f1a\u52a0 next-key lock \u5916\uff0c\u8fd8\u989d\u5916\u52a0\u95f4\u9699\u9501\uff0c\u4e5f\u5c31\u662f\u4f1a\u52a0\u4e24\u628a\u9501\u3002<br \/>2.\u5f53\u67e5\u8be2\u7684\u8bb0\u5f55\u4e0d\u5b58\u5728\u65f6\uff0c\u53ea\u4f1a\u52a0 next-key lock\uff0c\u7136\u540e\u4f1a\u9000\u5316\u4e3a\u95f4\u9699\u9501\uff0c\u4e5f\u5c31\u662f\u53ea\u4f1a\u52a0\u4e00\u628a\u9501\u3002<\/p>\n<p>\u975e\u552f\u4e00\u7d22\u5f15\u548c\u4e3b\u952e\u7d22\u5f15\u7684\u8303\u56f4\u67e5\u8be2\u7684\u52a0\u9501\u89c4\u5219\u4e0d\u540c\u4e4b\u5904\u5728\u4e8e\uff1a<br \/>\u552f\u4e00\u7d22\u5f15\u5728\u6ee1\u8db3\u4e00\u4e9b\u6761\u4ef6\u7684\u65f6\u5019\uff0cnext-key lock \u9000\u5316\u4e3a\u95f4\u9699\u9501\u548c\u8bb0\u5f55\u9501\u3002<br \/>\u975e\u552f\u4e00\u7d22\u5f15\u8303\u56f4\u67e5\u8be2\uff0cnext-key lock \u4e0d\u4f1a\u9000\u5316\u4e3a\u95f4\u9699\u9501\u548c\u8bb0\u5f55\u9501\u3002<\/p>\n<\/p>\n<p><a href=\"https:\/\/blog.csdn.net\/jinwufeiyang\/article\/details\/119578180?ops_request_misc=&amp;request_id=&amp;biz_id=102&amp;utm_term=MVCC%E4%BA%86%E8%A7%A3%E8%BF%87%E5%90%97%EF%BC%9F%E5%BA%95%E5%B1%82%E5%AE%9E%E7%8E%B0%E5%8E%9F%E7%90%86%E3%80%82&amp;utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduweb~default-3-119578180.142^v100^pc_search_result_base4&amp;spm=1018.2226.3001.4187\">MVCC\u5e95\u5c42\u539f\u7406<\/a><\/p>\n<p>mvcc\uff1a\u662f\u4e00\u79cd\u5728\u6570\u636e\u5e93\u7cfb\u7edf\u4e2d\u5b9e\u73b0\u5e76\u53d1\u63a7\u5236\u7684\u6280\u672f\uff0c\u5141\u8bb8\u591a\u4e2a\u4e8b\u52a1\u5e76\u53d1\u5730\u8bfb\u53d6\uff0c\u4fee\u6539\u6570\u636e\uff0c\u800c\u4e0d\u53d1\u751f\u6570\u636e\u51b2\u7a81\u6216\u4e0d\u4e00\u81f4\u7684\u95ee\u9898\uff0cmvcc\u7684\u6838\u5fc3\u601d\u60f3\u662f\u7248\u672c\u63a7\u5236\uff0c\u8fd9\u6837\u4e0d\u540c\u7684\u4e8b\u52a1\u53ef\u4ee5\u8bfb\u53d6\u6216\u4fee\u6539\u4e0d\u540c\u7684\u6570\u636e\u7248\u672c\uff0c\u4ece\u800c\u907f\u514d\u4e86\u4f20\u7edf\u7684\u9501\u673a\u5236\u6240\u5e26\u6765\u7684\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<p>mvcc\u53ea\u5728REPEATABLE READ\uff08\u53ef\u91cd\u590d\u8bfb\uff09 \u548c READ COMMITTED\uff08\u5df2\u8bfb\u63d0\u4ea4\uff09\u8fd9\u4fe9\u79cd\u9694\u79bb\u7ea7\u522b\u4e0b\u9002\u7528\u3002<\/p>\n<p>mvcc\u5b9e\u73b0\u539f\u7406\u662f\u901a\u8fc7 \u9690\u85cf\u5b57\u6bb5\uff08\u521b\u5efa\u65f6\u7248\u672c\u53f7\u3001\u56de\u6eda\u6307\u9488\u3001\u5220\u9664\u7248\u672c\u53f7\uff09\u3001undo log \u3001Read view\u6765\u5b9e\u73b0\u7684\u3002<\/p>\n<p>undolog\u8bb0\u5f55\u5386\u53f2\u7248\u672c\uff0cRead view \u8bb0\u5f55\u4e00\u7cfb\u5217\u672a\u63d0\u4ea4\u7684\u4e8b\u52a1\u7684id\u53f7\uff0c\u6700\u5c0fid\u548c\u6700\u5927id\uff0c\u901a\u8fc7\u548c\u8fd9\u4e24\u4e2aid\u7684\u6bd4\u8f83\uff0c\u6765\u786e\u8ba4\u6b64\u7248\u672c\u662f\u5426\u53ef\u89c1<\/p>\n<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2><a href=\"https:\/\/blog.csdn.net\/qq_53868937\/article\/details\/130165287?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522A1BA07FB-B726-44A2-BABA-AD677B611C6D%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&amp;request_id=A1BA07FB-B726-44A2-BABA-AD677B611C6D&amp;biz_id=0&amp;utm_medium=distribute.pc_search_result.none-task-blog-2~all~top_positive~default-2-130165287-null-null.142^v100^pc_search_result_base4&amp;utm_term=mysql%E4%BA%8B%E5%8A%A1%E9%9A%94%E7%A6%BB%E7%BA%A7%E5%88%AB&amp;spm=1018.2226.3001.4187\">Mysql\u56db\u79cd\u9694\u79bb\u7ea7\u522b\u548c\u4e09\u79cd\u5e38\u89c1\u5e76\u53d1\u95ee\u9898<\/a><\/h2>\n<p>READ-UNCOMMITTED(\u8bfb\u53d6\u672a\u63d0\u4ea4) \uff1a \u6700\u4f4e\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5141\u8bb8\u8bfb\u53d6\u5c1a\u672a\u63d0\u4ea4\u7684\u6570\u636e\u53d8\u66f4\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u810f\u8bfb\u3001\u5e7b\u8bfb\u6216\u4e0d\u53ef\u91cd\u590d\u8bfb\u3002<br \/>READ-COMMITTED(\u8bfb\u53d6\u5df2\u63d0\u4ea4) \uff1a \u5141\u8bb8\u8bfb\u53d6\u5e76\u53d1\u4e8b\u52a1\u5df2\u7ecf\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u53ef\u4ee5\u963b\u6b62\u810f\u8bfb\uff0c\u4f46\u662f\u5e7b\u8bfb\u6216\u4e0d\u53ef\u91cd\u590d\u8bfb\u4ecd\u6709\u53ef\u80fd\u53d1\u751f\u3002<br \/>REPEATABLE-READ(\u53ef\u91cd\u590d\u8bfb) \uff1a \u5bf9\u540c\u4e00\u5b57\u6bb5\u7684\u591a\u6b21\u8bfb\u53d6\u7ed3\u679c\u90fd\u662f\u4e00\u81f4\u7684\uff0c\u9664\u975e\u6570\u636e\u662f\u88ab\u672c\u8eab\u4e8b\u52a1\u81ea\u5df1\u6240\u4fee\u6539\uff0c\u53ef\u4ee5\u963b\u6b62\u810f\u8bfb\u548c\u4e0d\u53ef\u91cd\u590d\u8bfb\uff0c\u4f46\u5e7b\u8bfb\u4ecd\u6709\u53ef\u80fd\u53d1\u751f\u3002<br \/>SERIALIZABLE(\u53ef\u4e32\u884c\u5316) \uff1a \u6700\u9ad8\u7684\u9694\u79bb\u7ea7\u522b\uff0c\u5b8c\u5168\u670d\u4ece ACID \u7684\u9694\u79bb\u7ea7\u522b\u3002\u6240\u6709\u7684\u4e8b\u52a1\u4f9d\u6b21\u9010\u4e2a\u6267\u884c\uff0c\u8fd9\u6837\u4e8b\u52a1\u4e4b\u95f4\u5c31\u5b8c\u5168\u4e0d\u53ef\u80fd\u4ea7\u751f\u5e72\u6270\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u8be5\u7ea7\u522b\u53ef\u4ee5\u9632\u6b62\u810f\u8bfb\u3001\u4e0d\u53ef\u91cd\u590d\u8bfb\u4ee5\u53ca\u5e7b\u8bfb\u3002<\/p>\n<p>\u810f\u8bfb\uff1a\u8bfb\u5230\u4e86\u8fd8\u672a\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u8fd9\u4e2a\u672a\u63d0\u4ea4\u7684\u6570\u636e\u540e\u7eed\u53ef\u80fd\u4f1a\u88ab\u4fee\u6539\u5bfc\u81f4\u4e4b\u524d\u8bfb\u53d6\u6570\u636e\u9519\u8bef<\/p>\n<p>\u4e0d\u53ef\u91cd\u590d\u8bfb\uff1a\u5bf9\u4e8e\u539f\u6765\u7684\u4e00\u4e2a\u6570\u636e\u884c\uff0c\u4e00\u4e2a\u4e8b\u52a1\u5728\u8bfb\u53d6\u6570\u636e\u65f6\u53e6\u4e00\u4e2a\u4e8b\u52a1\u5c06\u8fd9\u4e2a\u6570\u636e\u884c\u4fee\u6539\uff0c\u5bfc\u81f4\u540e\u7eed\u8bfb\u53d6\u50cf\u540c\u884c\u4e0e\u4e4b\u524d\u8bfb\u53d6\u7684\u6570\u636e\u4e0d\u4e00\u81f4<\/p>\n<p>\u5e7b\u8bfb\uff1a\u539f\u6765\u8bfb\u5230\u4e86\u4e00\u4e9b\u6570\u636e\u884c\uff0c\u4e00\u4e2a\u4e8b\u52a1\u5728\u8bfb\u53d6\u7684\u540c\u65f6\u5176\u4ed6\u4e8b\u52a1\u5bf9\u4e00\u4e9b\u6570\u636e\u884c\u8fdb\u884c\u4e86\u4fee\u6539\uff0c\u5bfc\u81f4\u540e\u7eed\u518d\u6b21\u8bfb\u53d6\u770b\u5230\u4e86\u4e00\u4e9b\u4e4b\u524d\u672a\u89c1\u7684\u6570\u636e\u3002<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>Java\u7f3a\u70b9\u7684\u601d\u8003<\/h2>\n<p>1.\u6027\u80fd\u95ee\u9898\uff0c\u76f8\u6bd4C++\uff0cC\u8fd9\u4e9b\u5728\u672c\u5730\u7f16\u8bd1\u7684\uff0cjava\u6027\u80fd\u7684\u8868\u73b0\u8981\u8f83\u5dee<\/p>\n<p>2.\u5185\u5b58\u95ee\u9898\uff0c\u7531\u4e8eJava\u7684\u5806\u5185\u5b58\u548c\u5783\u573e\u56de\u6536\u673a\u5236\uff0c\u5bfc\u81f4Java\u7684\u5185\u5b58\u5360\u7528\u4f1a\u6bd4\u8f83\u5927<\/p>\n<p>3.\u957f\u65f6\u95f4\u8fd0\u884c\u4f1a\u5b58\u5728\u5185\u5b58\u6cc4\u6f0f\u548c\u5783\u573e\u56de\u6536\u6548\u7387\u4f4e\u4e0b\u7684\u95ee\u9898<\/p>\n<h3>\u5173\u4e8ejava\u5185\u5b58\u6cc4\u6f0f\u7684\u4e00\u4e9b\u4e86\u89e3<\/h3>\n<ol>\n<li>\u5185\u5b58\u6cc4\u6f0f\uff1a\u4e00\u4e9b\u5bf9\u8c61\u4e0d\u4f1a\u88ab\u7528\u5230\u4e86\uff0c\u4f46\u662f\u6ca1\u6709\u88ab\u53ca\u65f6\u56de\u6536\uff0c\u5bfc\u81f4\u4e00\u4e9b\u5185\u5b58\u59cb\u7ec8\u4e0d\u80fd\u88ab\u4f7f\u7528<\/li>\n<li>\u5185\u5b58\u6ea2\u51fa\uff08Out of memory\uff09\uff1a\u7533\u8bf7\u5185\u5b58\u65f6\uff0c\u53ef\u7528\u5185\u5b58\u4e0d\u591f<\/li>\n<li>\u4e8c\u8005\u7684\u5173\u7cfb\uff1a\u5185\u5b58\u6cc4\u6f0f\u2014\u2014&gt;\u5185\u5b58\u6ea2\u51fa<\/li>\n<li>\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u7684\u4e00\u4e9b\u5e38\u89c1\u60c5\u51b5\uff1a<br \/>\u5728\u957f\u5468\u671f\u751f\u547d\u5bf9\u8c61\uff08\u9759\u6001\u96c6\u5408\u7c7b\u7b49\uff09\u4e2d\u5f15\u7528\u4e86\u77ed\u5468\u671f\u751f\u547d\u5bf9\u8c61\uff0c\u5bfc\u81f4\u77ed\u5468\u671f\u7684\u8fd9\u4e2a\u5bf9\u8c61\u65e0\u6cd5\u88ab\u91ca\u653e\n<p>\u5355\u4f8b\u5bf9\u8c61\u6301\u6709\u5bf9\u5916\u90e8\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u5355\u4f8b\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u548cjvm\u4e00\u81f4<\/p>\n<p>\u5185\u90e8\u7c7b\u6301\u6709\u5916\u90e8\u7c7b<\/p>\n<p>\u5404\u79cd\u8fde\u63a5\uff0c\u6570\u636e\u5e93\u8fde\u63a5<\/p>\n<p>hash\u503c\u6539\u53d8<\/p>\n<p>\u7f13\u5b58\u6cc4\u6f0f<\/p>\n<p>\u76d1\u63a7\u5668\u548c\u56de\u8c03<\/p>\n<\/li>\n<\/ol>\n<h3>\u5173\u4e8ejava\u5355\u4f8b\u6a21\u5f0f\u7684\u4e00\u4e9b\u4e86\u89e3<\/h3>\n<p>\u5b9a\u4e49\uff1a\u4fdd\u8bc1\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\u5bf9\u8c61\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e2a\u8bbf\u95ee\u4ed6\u7684\u5168\u5c40\u8282\u70b9<\/p>\n<p>\u53cc\u91cd\u68c0\u6d4b\u9501\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f<\/p>\n<p>\u5355\u4f8b\u6a21\u5f0f\u4e00\u822c\u6709\u997f\u6c49\u6a21\u5f0f\uff08\u7a0b\u5e8f\u5f00\u59cb\u8fd0\u884c\u65f6\u5c31\u521b\u5efa\u8868\uff09\u548c\u61d2\u6c49\u6a21\u5f0f\uff08\u9700\u8981\u8fd9\u4e2a\u5b9e\u4f8b\u4e86\u518d\u521b\u5efa\uff09<\/p>\n<p>\u53cc\u91cd\u68c0\u67e5\u9501\u5c31\u662f\u5bf9\u61d2\u6c49\u6a21\u5f0f\u7684\u4f18\u5316<\/p>\n<\/p>\n<p>public class Singleton {<\/p>\n<p>private static volatile Singleton INSTANCE;<\/p>\n<p>private Singleton() {}<\/p>\n<p>public static Singleton getInstance() {<br \/>if (INSTANCE == null) {<br \/>synchronized (Singleton.class) {<br \/>if (INSTANCE == null) {<br \/>INSTANCE = new Singleton();<br \/>}<br \/>}<br \/>}<br \/>return INSTANCE;<br \/>}<br \/>}<\/p>\n<\/p>\n<p>\u8fd9\u91cc\u6709\u4e00\u4e2avolatile\u5173\u952e\u5b57\uff0c\u8fd9\u4e2a\u5173\u952e\u5b57\u7684\u4f5c\u7528\u662f\u4e3a\u4e86\u9632\u6b62\u7f16\u8bd1\u5668\u7684\u4ee3\u7801\u4f18\u5316\uff08\u901a\u4fd7\u8bf4\u6cd5\uff09<\/p>\n<p>\u4e00\u822cvolatile\u7528\u6765\u58f0\u660e\u53d8\u91cf\u7684\u7ebf\u7a0b\u53ef\u89c1\u6027\uff0c\u5373\u5e26\u6709volatile\u5173\u952e\u5b57\u7684\u53d8\u91cf\u5bf9\u6240\u6709\u7ebf\u7a0b\u53ef\u89c1<\/p>\n<p>\u8fd8\u6709\u53ef\u4ee5\u7528\u6765\u9632\u6b62\u6307\u4ee4\u91cd\u6392\u5e8f\uff0c\u5373\u4e0a\u9762\u63d0\u5230\u7684\u9632\u6b62\u7f16\u8bd1\u5668\u7684\u4ee3\u7801\u4f18\u5316<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>JAVA\u5e8f\u5217\u5316\u7684\u7406\u89e3<\/h2>\n<h3>\u57fa\u7840<\/h3>\n<p>Java\u5e8f\u5217\u5316\u662f\u4e00\u79cd\u673a\u5236\uff0c\u5b83\u53ef\u4ee5\u5c06\u4e00\u4e2aJava\u5bf9\u8c61\u7684\u72b6\u6001\u8f6c\u6362\u4e3a\u53ef\u5b58\u50a8\u6216\u53ef\u4f20\u8f93\u7684\u5f62\u5f0f\uff0c\u8fd9\u6837\uff0c\u4ee5\u540e\u5c31\u53ef\u4ee5\u5728\u9700\u8981\u65f6\u91cd\u65b0\u521b\u5efa\u8fd9\u4e2a\u5bf9\u8c61\u3002\u4ee5\u4e0b\u662f\u6211\u5bf9Java\u5e8f\u5217\u5316\u7684\u7406\u89e3\uff1a<br \/>1. **\u5b9a\u4e49**\uff1a\u5e8f\u5217\u5316\u662f\u6307\u5c06\u5bf9\u8c61\u7684\u72b6\u6001\u4fe1\u606f\u8f6c\u6362\u4e3a\u5b57\u8282\u6d41\u7684\u8fc7\u7a0b\uff0c\u800c\u53cd\u5e8f\u5217\u5316\u5219\u662f\u5c06\u5b57\u8282\u6d41\u6062\u590d\u4e3a\u5bf9\u8c61\u7684\u8fc7\u7a0b\u3002<br \/>2. **\u76ee\u7684**\uff1a<br \/>&#8211; **\u6301\u4e45\u5316**\uff1a\u5c06\u5bf9\u8c61\u7684\u72b6\u6001\u4fdd\u5b58\u5230\u6587\u4ef6\u3001\u6570\u636e\u5e93\u6216\u8fdc\u7a0b\u670d\u52a1\u5668\u4e0a\uff0c\u4ee5\u4f9b\u540e\u7eed\u4f7f\u7528\u3002<br \/>&#8211; **\u7f51\u7edc\u4f20\u8f93**\uff1a\u5728\u7f51\u7edc\u4e2d\u4f20\u8f93\u5bf9\u8c61\u65f6\uff0c\u9700\u8981\u5c06\u5bf9\u8c61\u5e8f\u5217\u5316\u6210\u5b57\u8282\u6d41\uff0c\u7136\u540e\u5728\u63a5\u6536\u7aef\u91cd\u65b0\u6784\u9020\u5bf9\u8c61\u3002<br \/>3. **\u5b9e\u73b0\u65b9\u5f0f**\uff1a<br \/>&#8211; \u8981\u4f7f\u4e00\u4e2a\u7c7b\u53ef\u5e8f\u5217\u5316\uff0c\u5b83\u5fc5\u987b\u5b9e\u73b0`java.io.Serializable`\u63a5\u53e3\u3002\u8fd9\u4e2a\u63a5\u53e3\u662f\u4e00\u4e2a\u6807\u8bb0\u63a5\u53e3\uff0c\u672c\u8eab\u6ca1\u6709\u5b9a\u4e49\u4efb\u4f55\u65b9\u6cd5\uff0c\u4f46\u5b83\u6307\u793aJava\u865a\u62df\u673a\uff08JVM\uff09\u8fd9\u4e2a\u7c7b\u7684\u5bf9\u8c61\u53ef\u4ee5\u88ab\u5e8f\u5217\u5316\u3002<br \/>&#8211; \u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u662f\u57fa\u672c\u6570\u636e\u7c7b\u578b\u6216\u5b9e\u73b0\u4e86`Serializable`\u63a5\u53e3\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5bf9\u8c61\u5c31\u53ef\u4ee5\u88ab\u5e8f\u5217\u5316\u3002<br \/>4. **\u6ce8\u610f\u4e8b\u9879**\uff1a<br \/>&#8211; **\u9759\u6001\u53d8\u91cf**\uff1a\u5e8f\u5217\u5316\u4e0d\u4f1a\u5305\u542b\u9759\u6001\u53d8\u91cf\uff0c\u56e0\u4e3a\u9759\u6001\u53d8\u91cf\u5c5e\u4e8e\u7c7b\uff0c\u800c\u4e0d\u662f\u5bf9\u8c61\u3002<br \/>&#8211; **transient\u5173\u952e\u5b57**\uff1a\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u88ab\u58f0\u660e\u4e3a`transient`\uff0c\u90a3\u4e48\u5728\u5e8f\u5217\u5316\u65f6\uff0c\u8fd9\u4e2a\u53d8\u91cf\u4f1a\u88ab\u5ffd\u7565\uff0c\u4e0d\u4f1a\u5e8f\u5217\u5316\u5230\u5b57\u8282\u6d41\u4e2d\u3002<br \/>&#8211; **\u7248\u672c\u53f7**\uff1a\u901a\u8fc7\u5728\u7c7b\u4e2d\u5b9a\u4e49`serialVersionUID`\uff0c\u53ef\u4ee5\u63a7\u5236\u5e8f\u5217\u5316\u7248\u672c\uff0c\u786e\u4fdd\u4e0d\u540c\u7248\u672c\u7684\u7c7b\u5728\u53cd\u5e8f\u5217\u5316\u65f6\u80fd\u591f\u6b63\u786e\u5904\u7406\u3002<br \/>5. **\u5b89\u5168\u6027**\uff1a\u5e8f\u5217\u5316\u53ef\u80fd\u4f1a\u5f15\u5165\u5b89\u5168\u95ee\u9898\uff0c\u56e0\u4e3a\u5bf9\u8c61\u7684\u72b6\u6001\u5305\u62ec\u654f\u611f\u4fe1\u606f\uff0c\u5982\u679c\u5e8f\u5217\u5316\u540e\u7684\u5b57\u8282\u6d41\u88ab\u622a\u83b7\uff0c\u53ef\u80fd\u4f1a\u9020\u6210\u4fe1\u606f\u6cc4\u9732\u3002<br \/>6. **\u6027\u80fd\u8003\u8651**\uff1a\u5e8f\u5217\u5316\u662f\u4e00\u4e2a\u8017\u65f6\u64cd\u4f5c\uff0c\u5bf9\u4e8e\u9891\u7e41\u5e8f\u5217\u5316\u7684\u5bf9\u8c61\uff0c\u9700\u8981\u8003\u8651\u6027\u80fd\u7684\u5f71\u54cd\u3002<br \/>7. **\u66ff\u4ee3\u65b9\u6848**\uff1a\u9664\u4e86Java\u539f\u751f\u7684\u5e8f\u5217\u5316\u673a\u5236\uff0c\u8fd8\u6709\u5176\u4ed6\u5982JSON\u3001XML\u7b49\u66f4\u52a0\u7075\u6d3b\u3001\u53ef\u8bfb\u6027\u66f4\u597d\u7684\u5e8f\u5217\u5316\u65b9\u5f0f\uff0c\u5b83\u4eec\u901a\u5e38\u7528\u4e8eWeb\u670d\u52a1\u548c\u5e94\u7528\u7a0b\u5e8f\u95f4\u7684\u6570\u636e\u4ea4\u6362\u3002<br \/>\u5728\u9762\u8bd5\u4e2d\uff0c\u8fd8\u53ef\u80fd\u4f1a\u88ab\u95ee\u5230\u5982\u4f55\u81ea\u5b9a\u4e49\u5e8f\u5217\u5316\u884c\u4e3a\uff0c\u6216\u8005\u5e8f\u5217\u5316\u4e0e\u53cd\u5e8f\u5217\u5316\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u9047\u5230\u7684\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6848\u3002\u7406\u89e3\u8fd9\u4e9b\u6982\u5ff5\u5bf9\u4e8eJava\u540e\u7aef\u5f00\u53d1\u8005\u6765\u8bf4\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<hr \/>\n<h3>\u62d3\u5c55<\/h3>\n<p>1.\u5982\u4f55\u81ea\u5b9a\u4e49\u5e8f\u5217\u5316\u884c\u4e3a<\/p>\n<p>\u5728Java\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u5b9e\u73b0\u81ea\u5b9a\u4e49\u5e8f\u5217\u5316\u884c\u4e3a\uff1a<br \/>1. **\u91cd\u5199`writeObject`\u548c`readObject`\u65b9\u6cd5**\uff1a<br \/>\u5728\u5b9e\u73b0`Serializable`\u63a5\u53e3\u7684\u7c7b\u4e2d\uff0c\u53ef\u4ee5\u6dfb\u52a0`private void writeObject(ObjectOutputStream out) throws IOException`\u548c`private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException`\u65b9\u6cd5\u3002\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u5206\u522b\u4f1a\u5728\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u65f6\u88ab\u8c03\u7528\uff0c\u4ece\u800c\u5141\u8bb8\u5f00\u53d1\u8005\u81ea\u5b9a\u4e49\u5bf9\u8c61\u7684\u5e8f\u5217\u5316\u8fc7\u7a0b\u3002<br \/>\u793a\u4f8b\u4ee3\u7801\uff1a<br \/>&#8220;`java<br \/>import java.io.*;<br \/>public class CustomSerializableObject implements Serializable {<br \/>private static final long serialVersionUID = 1L;<br \/>private int id;<br \/>private transient String password; \/\/ transient\u5173\u952e\u5b57\u8868\u793a\u4e0d\u5e8f\u5217\u5316\u8be5\u5b57\u6bb5<br \/>\/\/ \u7701\u7565\u6784\u9020\u51fd\u6570\u3001getter\u548csetter\u65b9\u6cd5<br \/>private void writeObject(ObjectOutputStream out) throws IOException {<br \/>out.defaultWriteObject(); \/\/ \u9ed8\u8ba4\u5e8f\u5217\u5316\u975etransient\u5b57\u6bb5<br \/>\/\/ \u81ea\u5b9a\u4e49\u5e8f\u5217\u5316\u884c\u4e3a\uff0c\u4f8b\u5982\u52a0\u5bc6\u5bc6\u7801<br \/>out.writeObject(encryptPassword(password));<br \/>}<br \/>private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {<br \/>in.defaultReadObject(); \/\/ \u9ed8\u8ba4\u53cd\u5e8f\u5217\u5316\u975etransient\u5b57\u6bb5<br \/>\/\/ \u81ea\u5b9a\u4e49\u53cd\u5e8f\u5217\u5316\u884c\u4e3a\uff0c\u4f8b\u5982\u89e3\u5bc6\u5bc6\u7801<br \/>password = decryptPassword((String) in.readObject());<br \/>}<br \/>\/\/ \u52a0\u5bc6\u548c\u89e3\u5bc6\u65b9\u6cd5\uff08\u793a\u4f8b\uff09<br \/>private String encryptPassword(String password) {<br \/>\/\/ \u5b9e\u73b0\u52a0\u5bc6\u903b\u8f91<br \/>return password; \/\/ \u8fd4\u56de\u52a0\u5bc6\u540e\u7684\u5bc6\u7801<br \/>}<br \/>private String decryptPassword(String encryptedPassword) {<br \/>\/\/ \u5b9e\u73b0\u89e3\u5bc6\u903b\u8f91<br \/>return encryptedPassword; \/\/ \u8fd4\u56de\u89e3\u5bc6\u540e\u7684\u5bc6\u7801<br \/>}<br \/>}<br \/>&#8220;`<br \/>2. **\u4f7f\u7528`Externalizable`\u63a5\u53e3**\uff1a<br \/>`Externalizable`\u662f`Serializable`\u63a5\u53e3\u7684\u4e00\u4e2a\u5b50\u63a5\u53e3\uff0c\u5b83\u63d0\u4f9b\u4e86\u5b8c\u5168\u81ea\u5b9a\u4e49\u5e8f\u5217\u5316\u884c\u4e3a\u7684\u80fd\u529b\u3002\u5b9e\u73b0`Externalizable`\u63a5\u53e3\u7684\u7c7b\u5fc5\u987b\u5b9e\u73b0`writeExternal`\u548c`readExternal`\u65b9\u6cd5\u3002<br \/>\u793a\u4f8b\u4ee3\u7801\uff1a<br \/>&#8220;`java<br \/>import java.io.*;<br \/>public class ExternalizableObject implements Externalizable {<br \/>private int id;<br \/>private String name;<br \/>\/\/ \u7701\u7565\u6784\u9020\u51fd\u6570\u3001getter\u548csetter\u65b9\u6cd5<br \/>@Override<br \/>public void writeExternal(ObjectOutput out) throws IOException {<br \/>\/\/ \u81ea\u5b9a\u4e49\u5e8f\u5217\u5316\u884c\u4e3a<br \/>out.writeInt(id);<br \/>out.writeObject(name);<br \/>}<br \/>@Override<br \/>public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {<br \/>\/\/ \u81ea\u5b9a\u4e49\u53cd\u5e8f\u5217\u5316\u884c\u4e3a<br \/>id = in.readInt();<br \/>name = (String) in.readObject();<br \/>}<br \/>}<br \/>&#8220;`<br \/>\u4f7f\u7528\u81ea\u5b9a\u4e49\u5e8f\u5217\u5316\u884c\u4e3a\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\uff1a<br \/>&#8211; `writeObject`\u548c`readObject`\u65b9\u6cd5\u5fc5\u987b\u662f\u79c1\u6709\u7684\uff0c\u5426\u5219\u5e8f\u5217\u5316\u673a\u5236\u4e0d\u4f1a\u8c03\u7528\u5b83\u4eec\u3002<br \/>&#8211; \u5982\u679c\u7c7b\u5b9e\u73b0\u4e86`Externalizable`\u63a5\u53e3\uff0c\u90a3\u4e48\u5728\u53cd\u5e8f\u5217\u5316\u65f6\uff0c\u5373\u4f7f\u6709\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\uff0c\u4e5f\u5fc5\u987b\u6709\u4e00\u4e2a\u53ef\u8bbf\u95ee\u7684\u7a7a\u6784\u9020\u51fd\u6570\uff0c\u56e0\u4e3a\u53cd\u5e8f\u5217\u5316\u65f6\u4f1a\u901a\u8fc7\u53cd\u5c04\u8c03\u7528\u7a7a\u6784\u9020\u51fd\u6570\u6765\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u3002<br \/>&#8211; \u81ea\u5b9a\u4e49\u5e8f\u5217\u5316\u884c\u4e3a\u53ef\u4ee5\u63d0\u9ad8\u5b89\u5168\u6027\uff0c\u6bd4\u5982\u5bf9\u654f\u611f\u6570\u636e\u8fdb\u884c\u52a0\u5bc6\u5904\u7406\uff0c\u4f46\u5728\u8fdb\u884c\u81ea\u5b9a\u4e49\u5e8f\u5217\u5316\u65f6\uff0c\u4e5f\u8981\u786e\u4fdd\u7ef4\u62a4\u5e8f\u5217\u5316\u7248\u672c\u7684\u4e00\u81f4\u6027\uff0c\u4ee5\u907f\u514d\u5728\u4e0d\u540c\u7248\u672c\u95f4\u7684\u517c\u5bb9\u6027\u95ee\u9898\u3002<\/p>\n<hr \/>\n<p>2.java\u5e8f\u5217\u5316\u7684\u5b89\u5168\u98ce\u9669<\/p>\n<p>\u5e8f\u5217\u5316\u7684\u5b89\u5168\u98ce\u9669\u8be6\u89e3<br \/>\u654f\u611f\u6570\u636e\u6cc4\u9732\uff1a\u5f53\u5bf9\u8c61\u88ab\u5e8f\u5217\u5316\u65f6\uff0c\u5176\u6240\u6709\u5b57\u6bb5\uff08\u5305\u62ec\u79c1\u6709\u5b57\u6bb5\uff09\u90fd\u4f1a\u88ab\u8f6c\u6362\u4e3a\u5b57\u8282\u6d41\u3002\u5982\u679c\u8fd9\u4e9b\u5b57\u6bb5\u5305\u542b\u654f\u611f\u4fe1\u606f\uff0c\u5982\u5bc6\u7801\u3001\u4e2a\u4eba\u8eab\u4efd\u4fe1\u606f\u7b49\uff0c\u8fd9\u4e9b\u4fe1\u606f\u53ef\u80fd\u4f1a\u5728\u5e8f\u5217\u5316\u8fc7\u7a0b\u4e2d\u88ab\u65e0\u610f\u4e2d\u66b4\u9732\u3002\u4e00\u65e6\u5e8f\u5217\u5316\u6570\u636e\u88ab\u672a\u6388\u6743\u8bbf\u95ee\uff0c\u654f\u611f\u4fe1\u606f\u5c31\u53ef\u80fd\u88ab\u6cc4\u9732\u3002<\/p>\n<p>\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\uff1a\u5e8f\u5217\u5316\u6570\u636e\u53ef\u4ee5\u88ab\u6076\u610f\u7be1\u6539\uff0c\u5f53\u8fd9\u4e9b\u88ab\u7be1\u6539\u7684\u6570\u636e\u88ab\u53cd\u5e8f\u5217\u5316\u65f6\uff0c\u53ef\u80fd\u4f1a\u6267\u884c\u975e\u9884\u671f\u7684\u4ee3\u7801\u3002\u8fd9\u79cd\u653b\u51fb\u901a\u5e38\u5229\u7528\u4e86Java\u7684\u53cd\u5c04\u673a\u5236\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u6784\u9020\u7279\u5b9a\u7684\u5e8f\u5217\u5316\u6570\u636e\u6765\u89e6\u53d1\u4efb\u610f\u4ee3\u7801\u7684\u6267\u884c\u3002<\/p>\n<p>\u62d2\u7edd\u670d\u52a1\u653b\u51fb\uff1a\u6076\u610f\u6784\u9020\u7684\u5e8f\u5217\u5316\u6570\u636e\u53ef\u80fd\u5bfc\u81f4\u5e94\u7528\u7a0b\u5e8f\u5728\u53cd\u5e8f\u5217\u5316\u65f6\u6d88\u8017\u5927\u91cf\u8d44\u6e90\uff0c\u5982CPU\u3001\u5185\u5b58\u7b49\uff0c\u4ece\u800c\u5bfc\u81f4\u670d\u52a1\u4e0d\u53ef\u7528\u3002\u8fd9\u79cd\u653b\u51fb\u4e0d\u9700\u8981\u6267\u884c\u4ee3\u7801\uff0c\u4ec5\u901a\u8fc7\u6d88\u8017\u8d44\u6e90\u5c31\u80fd\u8fbe\u5230\u653b\u51fb\u76ee\u7684\u3002<\/p>\n<p>\u89e3\u51b3\u65b9\u6848\u4e0e\u6700\u4f73\u5b9e\u8df5\u8be6\u89e3<br \/>\u907f\u514d\u5e8f\u5217\u5316\u654f\u611f\u6570\u636e\uff1a\u5bf9\u4e8e\u5305\u542b\u654f\u611f\u4fe1\u606f\u7684\u7c7b\uff0c\u5e94\u907f\u514d\u5b9e\u73b0Serializable\u63a5\u53e3\u3002\u5982\u679c\u5fc5\u987b\u5e8f\u5217\u5316\uff0c\u786e\u4fdd\u654f\u611f\u6570\u636e\u5b57\u6bb5\u88ab\u6807\u8bb0\u4e3atransient\uff0c\u8fd9\u6837\u5b83\u4eec\u5c31\u4e0d\u4f1a\u88ab\u5305\u542b\u5728\u5e8f\u5217\u5316\u6570\u636e\u4e2d\u3002\u6b64\u5916\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u52a0\u5bc6\u6280\u672f\u6765\u4fdd\u62a4\u5e8f\u5217\u5316\u6570\u636e\u3002<\/p>\n<p>\u4f7f\u7528\u5b89\u5168\u7684\u5e8f\u5217\u5316\u5e93\uff1a\u9664\u4e86Java\u539f\u751f\u7684\u5e8f\u5217\u5316\u673a\u5236\uff0c\u8fd8\u6709\u5176\u4ed6\u66f4\u5b89\u5168\u7684\u5e8f\u5217\u5316\u5e93\uff0c\u5982Google\u7684Protocol Buffers\u548cApache\u7684Avro\u3002\u8fd9\u4e9b\u5e93\u901a\u5e38\u63d0\u4f9b\u66f4\u4e25\u683c\u7684\u7c7b\u578b\u68c0\u67e5\u548c\u66f4\u5c0f\u7684\u653b\u51fb\u9762\uff0c\u4ece\u800c\u51cf\u5c11\u5b89\u5168\u98ce\u9669\u3002<\/p>\n<p>\u8f93\u5165\u9a8c\u8bc1\uff1a\u5728\u63a5\u53d7\u5916\u90e8\u8f93\u5165\u8fdb\u884c\u53cd\u5e8f\u5217\u5316\u4e4b\u524d\uff0c\u8fdb\u884c\u4e25\u683c\u7684\u8f93\u5165\u9a8c\u8bc1\u3002\u8fd9\u5305\u62ec\u68c0\u67e5\u6570\u636e\u683c\u5f0f\u3001\u7c7b\u578b\u548c\u957f\u5ea6\u7b49\u3002\u786e\u4fdd\u53ea\u63a5\u53d7\u9884\u671f\u7684\u6570\u636e\u683c\u5f0f\u548c\u7c7b\u578b\uff0c\u907f\u514d\u63a5\u53d7\u672a\u77e5\u6216\u4e0d\u53d7\u4fe1\u4efb\u7684\u6570\u636e\u6e90\u3002<\/p>\n<p>\u767d\u540d\u5355\u53cd\u5e8f\u5217\u5316\uff1a\u5b9e\u73b0\u4e00\u4e2a\u767d\u540d\u5355\u673a\u5236\uff0c\u53ea\u5141\u8bb8\u53cd\u5e8f\u5217\u5316\u7279\u5b9a\u7684\u7c7b\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u81ea\u5b9a\u4e49ObjectInputStream\u7684\u5b50\u7c7b\u5e76\u91cd\u5199resolveClass\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002\u5728resolveClass\u65b9\u6cd5\u4e2d\uff0c\u53ef\u4ee5\u68c0\u67e5\u53cd\u5e8f\u5217\u5316\u7684\u7c7b\u662f\u5426\u5728\u767d\u540d\u5355\u4e2d\uff0c\u5982\u679c\u4e0d\u662f\uff0c\u5219\u629b\u51fa\u5f02\u5e38\u3002<\/p>\n<p>\u4f7f\u7528\u5e8f\u5217\u5316\u8fc7\u6ee4\u5668\uff1aJava 9\u5f15\u5165\u4e86\u5e8f\u5217\u5316\u8fc7\u6ee4\u5668\uff0c\u5141\u8bb8\u5728\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u4e4b\u524d\u5bf9\u6570\u636e\u8fdb\u884c\u68c0\u67e5\u548c\u4fee\u6539\u3002\u8fd9\u53ef\u4ee5\u7528\u6765\u963b\u6b62\u5e8f\u5217\u5316\u6216\u53cd\u5e8f\u5217\u5316\u4e0d\u5b89\u5168\u7684\u7c7b\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u8fc7\u6ee4\u5668\u6765\u963b\u6b62\u5e8f\u5217\u5316\u5305\u542b\u654f\u611f\u4fe1\u606f\u7684\u7c7b\u3002<\/p>\n<p>\u5b9a\u671f\u66f4\u65b0\u548c\u6253\u8865\u4e01\uff1a\u786e\u4fdd\u4f7f\u7528\u7684Java\u7248\u672c\u662f\u6700\u65b0\u7684\uff0c\u5e76\u5b9a\u671f\u68c0\u67e5\u548c\u5e94\u7528\u5b89\u5168\u8865\u4e01\u3002Java\u793e\u533a\u7ecf\u5e38\u53d1\u5e03\u5b89\u5168\u66f4\u65b0\uff0c\u4ee5\u4fee\u590d\u5df2\u77e5\u7684\u5b89\u5168\u6f0f\u6d1e\u3002<\/p>\n<p>\u793a\u4f8b\uff1a\u4f7f\u7528\u5e8f\u5217\u5316\u8fc7\u6ee4\u5668<br \/>Java 9\u53ca\u66f4\u9ad8\u7248\u672c\u63d0\u4f9b\u4e86\u5e8f\u5217\u5316\u8fc7\u6ee4\u5668\u529f\u80fd\uff0c\u53ef\u4ee5\u5728\u5e8f\u5217\u5316\u8fc7\u7a0b\u4e2d\u5bf9\u6570\u636e\u8fdb\u884c\u8fc7\u6ee4\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528\u5e8f\u5217\u5316\u8fc7\u6ee4\u5668\u6765\u589e\u5f3a\u5b89\u5168\u6027\u7684\u793a\u4f8b\uff1a<\/p>\n<p>\/\/ \u8bbe\u7f6e\u5e8f\u5217\u5316\u8fc7\u6ee4\u5668<br \/>SerializationFilter filter = new SerializationFilter() {<br \/>@Override<br \/>public boolean filter(Object object) {<br \/>if (object instanceof SensitiveClass) {<br \/>return false; \/\/ \u963b\u6b62\u5e8f\u5217\u5316SensitiveClass<br \/>}<br \/>return true; \/\/ \u5141\u8bb8\u5176\u4ed6\u5bf9\u8c61<br \/>}<br \/>};<\/p>\n<p>try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(&#8220;data.ser&#8221;))) {<br \/>oos.setObjectInputFilter(filter);<br \/>\/\/ \u5e8f\u5217\u5316\u5bf9\u8c61<br \/>} catch (IOException e) {<br \/>e.printStackTrace();<br \/>}<br \/>\u7ed3\u8bba<br \/>Java\u5e8f\u5217\u5316\u662f\u4e00\u4e2a\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u4f46\u5982\u679c\u4e0d\u52a0\u4ee5\u9002\u5f53\u7684\u5b89\u5168\u63aa\u65bd\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e25\u91cd\u7684\u5b89\u5168\u95ee\u9898\u3002\u901a\u8fc7\u907f\u514d\u5e8f\u5217\u5316\u654f\u611f\u6570\u636e\u3001\u4f7f\u7528\u5b89\u5168\u7684\u5e8f\u5217\u5316\u5e93\u3001\u5b9e\u65bd\u8f93\u5165\u9a8c\u8bc1\u548c\u4f7f\u7528\u5e8f\u5217\u5316\u8fc7\u6ee4\u5668\u7b49\u63aa\u65bd\uff0c\u53ef\u4ee5\u663e\u8457\u964d\u4f4e\u5b89\u5168\u98ce\u9669\u3002\u5f00\u53d1\u8005\u5e94\u59cb\u7ec8\u4fdd\u6301\u8b66\u60d5\uff0c\u786e\u4fdd\u5e8f\u5217\u5316\u8fc7\u7a0b\u7684\u5b89\u5168\u6027\uff0c\u4ee5\u4fdd\u62a4\u5e94\u7528\u7a0b\u5e8f\u514d\u53d7\u6f5c\u5728\u7684\u5b89\u5168\u5a01\u80c1\u3002<\/p>\n<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2><a href=\"https:\/\/blog.csdn.net\/qq_41611688\/article\/details\/127679857?ops_request_misc=&amp;request_id=&amp;biz_id=102&amp;utm_term=%E5%8F%8D%E5%B0%84%E7%9A%84%E7%BC%BA%E7%82%B9&amp;utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduweb~default-6-127679857.142^v100^pc_search_result_base4&amp;spm=1018.2226.3001.4187\">JAVA\u53cd\u5c04<\/a><\/h2>\n<p>\u53cd\u5c04\u5728java\u4e2d\u7684\u4f5c\u7528\u5c31\u662f\u8ba9java\u53ef\u4ee5\u52a8\u6001\u7684\u521b\u5efa\u5bf9\u8c61\uff0c\u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5<\/p>\n<p>\u53cd\u5c04\u662f\u8ba1\u7b97\u673a\u7f16\u7a0b\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u5b83\u6307\u7684\u662f\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u83b7\u53d6\u5bf9\u8c61\u7684\u72b6\u6001\u4fe1\u606f\u5e76\u5bf9\u5176\u8fdb\u884c\u64cd\u4f5c\u7684\u80fd\u529b\u3002\u5728<a class=\"hl hl-1\" href=\"https:\/\/so.csdn.net\/so\/search?q=%E9%9D%A2%E5%90%91%E5%AF%B9%E8%B1%A1%E7%BC%96%E7%A8%8B&amp;spm=1001.2101.3001.7020\" target=\"_blank\" rel=\"noopener\" data-report-click=\"{&quot;spm&quot;:&quot;1001.2101.3001.7020&quot;,&quot;dest&quot;:&quot;https:\/\/so.csdn.net\/so\/search?q=%E9%9D%A2%E5%90%91%E5%AF%B9%E8%B1%A1%E7%BC%96%E7%A8%8B&amp;spm=1001.2101.3001.7020&quot;,&quot;extra&quot;:&quot;{\\&quot;searchword\\&quot;:\\&quot;\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\\&quot;}&quot;}\" data-tit=\"\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\" data-pretit=\"\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\">\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b<\/a>\u4e2d\uff0c\u53cd\u5c04\u901a\u5e38\u7528\u4e8e\u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u521b\u5efa\u5bf9\u8c61\u3001\u8c03\u7528\u65b9\u6cd5\u548c\u4fee\u6539\u5c5e\u6027\u7b49\u64cd\u4f5c\u3002<\/p>\n<h3>\u5728Java\u4e2d\u7684\u5b9a\u4e49<\/h3>\n<ol>\n<li id=\"u8ce50a7a\">\u7ed9\u5b9a\u4e00\u4e2a\u7c7b\u5bf9\u8c61\uff08Class\u5bf9\u8c61\uff09,\u901a\u8fc7\u53cd\u5c04\u83b7\u53d6\u8fd9\u4e2a\u5bf9\u8c61\uff08Class\u5bf9\u8c61\uff09\u7684\u6240\u6709\u6210\u5458\u7ed3\u6784\uff1b<\/li>\n<li id=\"u05c25385\">\u7ed9\u5b9a\u4e00\u4e2a\u5177\u4f53\u7684\u5bf9\u8c61\uff0c\u80fd\u591f\u52a8\u6001\u7684\u8c03\u7528\u5b83\u7684\u65b9\u6cd5\u53ca\u5bf9\u4efb\u610f\u5c5e\u6027\u503c\u8fdb\u884c\u83b7\u53d6\u548c\u8d4b\u503c<\/li>\n<li id=\"uee3f6700\">\u8fd9\u79cd\u52a8\u6001\u83b7\u53d6\u7c7b\u7684\u5185\u5bb9\u3001\u521b\u5efa\u5bf9\u8c61\u3001\u4ee5\u53ca\u52a8\u6001\u8c03\u7528\u5bf9\u8c61\u65b9\u6cd5\u53ca\u64cd\u4f5c\u5c5e\u6027\u7684\u673a\u5236\uff0c\u5c31\u53eb\u505aJava\u7684\u53cd\u5c04\u673a\u5236\u3002<\/li>\n<\/ol>\n<h3>\u53cd\u5c04\u4f18\u70b9<\/h3>\n<p>\u53cd\u5c04\u7684\u4f18\u70b9\u4e3b\u8981\u5305\u62ec\u7075\u6d3b\u6027\u3001\u52a8\u6001\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002\u901a\u8fc7\u53cd\u5c04\uff0c\u7a0b\u5e8f\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u52a0\u8f7d\u548c\u4f7f\u7528\u4e0d\u540c\u7684\u7c7b\u548c\u65b9\u6cd5\uff0c\u800c\u4e0d\u9700\u8981\u5728\u7f16\u8bd1\u671f\u8fdb\u884c\u786c\u7f16\u7801\u3002\u8fd9\u4f7f\u5f97\u7a0b\u5e8f\u66f4\u52a0\u7075\u6d3b\uff0c\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u9700\u6c42\u548c\u573a\u666f\u52a8\u6001\u5730\u8c03\u6574\u884c\u4e3a\u3002\u6b64\u5916\uff0c\u53cd\u5c04\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u63d2\u4ef6\u67b6\u6784\u548c\u6a21\u5757\u5316\u8bbe\u8ba1\uff0c\u4f7f\u5f97\u7a0b\u5e8f\u66f4\u52a0\u6613\u4e8e\u6269\u5c55\u548c\u7ef4\u62a4\u3002<\/p>\n<p>\u5bf9\u4e8ejava\u800c\u8a00<\/p>\n<p>1.\u589e\u52a0\u7a0b\u5e8f\u7075\u6d3b\u6027\uff0c\u903b\u8f91\u53ef\u4ee5\u4e0d\u7528\u5199\u6b7b<\/p>\n<p>2.\u4ee3\u7801\u7b80\u6d01\uff0c\u53ef\u8bfb\u6027\u5f3a\uff0c\u63d0\u9ad8\u4ee3\u7801\u590d\u7528\u7387<\/p>\n<h3>\u53cd\u5c04\u7f3a\u70b9<\/h3>\n<p>\u9996\u5148\uff0c\u53cd\u5c04\u64cd\u4f5c\u53ef\u80fd\u4f1a\u5f71\u54cd\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u56e0\u4e3a\u5b83\u4eec\u9700\u8981\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u5730\u89e3\u6790\u7c7b\u548c\u65b9\u6cd5\u7b49\u4fe1\u606f\u3002\u5176\u6b21\uff0c\u53cd\u5c04\u64cd\u4f5c\u53ef\u80fd\u4f1a\u7834\u574f\u5c01\u88c5\u6027\uff0c\u4f7f\u5f97\u7a0b\u5e8f\u5728\u8fd0\u884c\u65f6\u53ef\u4ee5\u8bbf\u95ee\u548c\u4fee\u6539\u5bf9\u8c61\u7684\u79c1\u6709\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u6b64\u5916\uff0c\u53cd\u5c04\u64cd\u4f5c\u53ef\u80fd\u4f1a\u5f15\u5165\u5b89\u5168\u98ce\u9669\uff0c\u4f8b\u5982\u4ee3\u7801\u6ce8\u5165\u653b\u51fb\u7b49\u3002<\/p>\n<p>\u5bf9\u4e8ejava\u800c\u8a00<\/p>\n<p>1.\u76f8\u8f83\u76f4\u63a5\u8c03\u7528\u5728\u521b\u5efa\u5bf9\u8c61\u6bd4\u8f83\u591a\u7684\u60c5 \u666f\u4e0b\u53cd\u5c04\u6027\u80fd\u4e0b\u964d<br \/>2.\u5185\u90e8\u66b4\u9732\u548c\u5b89\u5168\u9690\u60a3\uff08\u7834\u574f\u5355\u4f8b\uff09<\/p>\n<\/p>\n<h3>\u62d3\u5c55\uff08\u53cd\u5c04\u7834\u574f\u5355\u4f8b\u6a21\u5f0f\u548c\u9884\u9632\uff09<\/h3>\n<p>1.\u5982\u4f55\u7834\u574f<\/p>\n<p>\u53cd\u5c04\u662f Java \u63d0\u4f9b\u7684\u4e00\u79cd\u529f\u80fd\u5f3a\u5927\u7684\u673a\u5236\uff0c\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u8bbf\u95ee\u7c7b\u7684\u79c1\u6709\u6210\u5458\u3001\u6784\u9020\u51fd\u6570\u548c\u65b9\u6cd5\u3002\u5c3d\u7ba1<strong>\u5355\u4f8b\u6a21\u5f0f\u901a\u8fc7\u5c06\u6784\u9020\u51fd\u6570\u79c1\u6709\u5316\u6765\u9632\u6b62\u5916\u90e8\u521b\u5efa\u5bf9\u8c61\uff08\u8fd9\u662f\u5355\u4f8b\u6a21\u5f0f\u7684\u6838\u5fc3\uff09<\/strong>\uff0c\u53cd\u5c04\u4ecd\u80fd\u7ed5\u8fc7\u8fd9\u4e00\u9650\u5236\u3002\u901a\u8fc7\u8c03\u7528\u79c1\u6709\u6784\u9020\u51fd\u6570\uff0c\u53cd\u5c04\u53ef\u4ee5\u5b9e\u4f8b\u5316\u65b0\u7684\u5bf9\u8c61\uff0c\u7834\u574f\u5355\u4f8b\u6a21\u5f0f\u7684\u552f\u4e00\u6027\u3002<\/p>\n<pre class=\"code\"> import java.lang.reflect.Constructor;\n\npublic class ReflectionSingletonTest {\n    public static void main(String[] args) {\n        try {\n            \/\/ \u83b7\u53d6\u5355\u4f8b\u5b9e\u4f8b\n            Singleton instance1 = Singleton.getInstance();\n\n            \/\/ \u901a\u8fc7\u53cd\u5c04\u83b7\u53d6\u79c1\u6709\u6784\u9020\u65b9\u6cd5\n            Constructor constructor = Singleton.class.getDeclaredConstructor();\n            constructor.setAccessible(true);  \/\/ \u8bbe\u7f6e\u53ef\u8bbf\u95ee\u6027\n\n            \/\/ \u901a\u8fc7\u53cd\u5c04\u521b\u5efa\u65b0\u7684\u5b9e\u4f8b\n            Singleton instance2 = constructor.newInstance();\n\n            \/\/ \u6bd4\u8f83\u4e24\u4e2a\u5b9e\u4f8b\u662f\u5426\u76f8\u540c\n            System.out.println(\"instance1 == instance2: \" + (instance1 == instance2));\n        } catch (Exception e) {\n            e.printStackTrace();\n        }\n    }\n}\n<\/pre>\n<p>2.\u5982\u4f55\u9884\u9632<br \/>\u4e3a\u4e86\u9632\u6b62\u53cd\u5c04\u7834\u574f\u5355\u4f8b\u6a21\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u6784\u9020\u65b9\u6cd5\u4e2d\u6dfb\u52a0\u903b\u8f91\u5224\u65ad\uff0c\u786e\u4fdd\u5373\u4f7f\u901a\u8fc7\u53cd\u5c04\u8c03\u7528\uff0c\u5b9e\u4f8b\u4e5f\u4e0d\u80fd\u88ab\u591a\u6b21\u521b\u5efa\u3002\u5177\u4f53\u505a\u6cd5\u662f\u5728\u6784\u9020\u65b9\u6cd5\u4e2d\u68c0\u67e5\u5b9e\u4f8b\u662f\u5426\u5df2\u7ecf\u5b58\u5728\uff0c\u5982\u679c\u5b58\u5728\u5219\u629b\u51fa\u5f02\u5e38\u3002<\/p>\n<pre class=\"code\">public class Singleton {\n    private static final Singleton INSTANCE = new Singleton();\n\n    private Singleton() {\n        \/\/ \u9632\u6b62\u53cd\u5c04\u521b\u5efa\u65b0\u5b9e\u4f8b\n        if (INSTANCE != null) {\n            throw new RuntimeException(\"\u5355\u4f8b\u6a21\u5f0f\u7981\u6b62\u53cd\u5c04\u521b\u5efa\u5b9e\u4f8b\uff01\");\n        }\n    }\n\n    public static Singleton getInstance() {\n        return INSTANCE;\n    }\n}\n\u00a0<\/pre>\n<h3>\u53cd\u5c04\u6027\u80fd\u6162\u7684\u539f\u56e0<\/h3>\n<p>1.\u5bfb\u627e\u7c7bClass\u5b57\u8282\u7801\u7684\u8fc7\u7a0b\uff0c\u6bd4\u5982\u901a\u8fc7ClassName\u627e\u5230\u5bf9\u5e94\u7684\u5b57\u8282\u7801Class\uff0c\u7136\u540e\u52a0\u8f7d\u3001\u89e3\u6790\uff0c\u4f1a\u6bd4\u8f83\u6162\uff0c\u800cnew\u7684\u65b9\u5f0f\u5219\u65e0\u9700\u5bfb\u627e\uff0c\u56e0\u4e3a\u5728Linking\u7684\u89e3\u6790\u9636\u6bb5\u5df2\u7ecf\u5c06\u7b26\u53f7\u5f15\u7528\u8f6c\u4e3a\u4e86\u76f4\u63a5\u5f15\u7528<br \/>2.\u5b89\u5168\u7ba1\u7406\u673a\u5236\u7684\u6743\u9650\u9a8c\u8bc1\u7b49<br \/>3.\u82e5\u9700\u8981\u8c03\u7528native\u65b9\u6cd5\u8c03\u7528\u65f6JNI\u63a5\u53e3\u7684\u4f7f\u7528<br \/>4.\u5165\u53c2\u6821\u9a8c<\/p>\n<h3>\u53cd\u5c04\u83b7\u53d6class\u5bf9\u8c61\u7684\u7ec4\u6210<\/h3>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/15\/image2e6012d8d7450337.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/15\/image2e6012d8d7450337.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h3>\u53cd\u5c04\u83b7\u53d6class\u5bf9\u8c61\u7684\u65b9\u6cd5<\/h3>\n<ol>\n<li id=\"ubfd0acc9\">\u901a\u8fc7ClassLoader\u5bf9\u8c61\u7684loadClass\uff08\uff09\u65b9\u6cd5<\/li>\n<li id=\"u92ca6f69\">\u7c7b\u540d.class<\/li>\n<li id=\"u85b83f52\">Class.forName()<\/li>\n<li id=\"uce835c32\">object.getClass()<\/li>\n<\/ol>\n<pre class=\"code\">\/**\n * \u83b7\u53d6Class\u6587\u4ef6\u7684\u65b9\u5f0f\n * 1\u3001\u7c7b\u540d.class\n * 2\u3001Class.forName \/\/\u53cd\u5c04\n * 3\u3001\u5bf9\u8c61.getClass()\n * 4\u3001\u901a\u8fc7\u7c7b\u52a0\u8f7d\u5668.loadClass()\n *\/\npublic class CoreMain {\n    public static void main(String[] args) throws Exception{\n \n        \/\/1\u3001 \u4e0d\u4f1a\u5806\u7c7b\u521d\u59cb\u5316\n        Class clazz01 = Person.class;\n        System.out.println(clazz01);\n        \/\/2\u3001MySQL\n        Class&lt;?&gt; clazz02 = Class.forName(\"com.javacore.reflection.pojo.Person\");\n        System.out.println(clazz02);\n        \/\/3\u3001\u5df2\u77e5\u5b9e\u4f8b\u5bf9\u8c61\n        Class&lt;? extends Person&gt; clazz03 = new Person().getClass();\n        System.out.println(clazz03);\n        \/\/4\u3001\u901a\u8fc7\u7c7b\u52a0\u8f7d\u5668\n        Class&lt;?&gt; clazz04 = CoreMain.class.getClassLoader().loadClass(\"com.javacore.reflection.pojo.Person\");\n        System.out.println(clazz04);\n \n        \/\/\u901a\u8fc7Clazz\u83b7\u53d6\u57fa\u672c\u4fe1\u606f\uff1b\u5c5e\u6027\u4fe1\u606f\uff1b\u65b9\u6cd5\u4fe1\u606f\uff1b\u6ce8\u89e3\u4fe1\u606f\n        \/**\n         * \u83b7\u53d6\u7684\u662f\u7c7b\u7684\u4fee\u9970\u7b26\n         *\/\n        System.out.println(\"--------------\");\n        \/\/ \u7c7b\u4e2d\u5b58\u5728\u7684\u4fee\u9970\u7b26,\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u6574\u6570\uff0c\u53ef\u4ee5\u901a\u8fc7toString\u65b9\u6cd5\u5c55\u793a\u51fa\u6765\u662f\u54ea\u4e2a\u4fee\u9970\u7b26 \n        int modifiers = clazz01.getModifiers();\n        System.out.println(Modifier.toString(modifiers);\n        System.out.println(clazz01.getPackage());\n        System.out.println(clazz01.getName());\n        System.out.println(clazz01.getSimpleName());\n        System.out.println(clazz01.getClassLoader());\n        System.out.println(clazz01.getInterfaces());\n        System.out.println(clazz01.getSuperclass());\n        System.out.println(clazz01.getAnnotations());\n \n        \/**\n         * \u5c5e\u6027\u57fa\u672c\u64cd\u4f5c\n         *\/\n        System.out.println(\"--------------\");\n        Class clazz = User.class;\n        User user = clazz.newInstance(); \/\/ \u53cd\u5c04\u8c03\u7528\u7684\u65e0\u53c2\u7684\u6784\u9020\u65b9\u6cd5\n \n        Field[] fields = clazz.getFields(); \/\/\u6240\u6709public\u5b57\u6bb5\u3001\u5305\u62ec\u7ee7\u627f\u6765\u7684\n        for(Field field:fields){\n            System.out.println(field.getName());\n        }\n        System.out.println(\"--------------\");\n        Field[] declaredFields = clazz.getDeclaredFields();\/\/\u83b7\u53d6\u5f53\u524d\u7c7b\u4e2d\u5b9a\u4e49\u7684\n        for(Field field:declaredFields){\n            System.out.println(field.getName());\n        }\n        System.out.println(\"--------------\");\n        Field addField = clazz.getDeclaredField(\"address\");\n        addField.setAccessible(true); \/\/\u8bbe\u7f6e\u5b57\u6bb5\u7684\u5f3a\u5236\u8bbf\u95ee,\u4ee3\u8868\u53cd\u5c04\u7684\u4e0d\u5b89\u5168\uff0cprivate\u7684\u90fd\u80fd\u8bbf\u95ee\n        addField.set(user,\"\u5317\u4eac\u897f\u4e09\u65d7\");\n        System.out.println(user.getAddress());\n        System.out.println(\"--------------\");\n \n        Field nationalty = clazz.getDeclaredField(\"nationalty\");\n        nationalty.set(null,\"\u4e2d\u56fd\");\n        System.out.println(user.nationalty);\n        System.out.println(\"--------------\");\n        \/\/ \u6784\u9020\u51fd\u6570\n        clazz.getDeclaredConstructors();\n        Constructor declaredConstructor = clazz.getDeclaredConstructor(String.class, String.class);\n        declaredConstructor.setAccessible(true);\n        User user1 = declaredConstructor.newInstance(\"idCard\", \"address\");\n        User user2 = clazz.newInstance(); \/\/\u901a\u8fc7\u65e0\u53c2\u7684\u6784\u9020\u51fd\u6570\u53cd\u5c04\u51fa\u6765\u7684\uff0c\u65e0\u53c2\u7684\u6784\u9020\u51fd\u6570\u9700\u8981\u662fpublic\n        System.out.println(user1);\n \n        System.out.println(\"--------------\");\n        SingleDemo instance1 = SingleDemo.getInstance();\n        SingleDemo instance2 = SingleDemo.getInstance();\n        System.out.println(instance1==instance2);\n \n        Constructor&lt;? extends SingleDemo&gt; constructor = instance1.getClass().getDeclaredConstructor();\n        constructor.setAccessible(true);\n        SingleDemo instance3 = constructor.newInstance();\n        System.out.println(instance1==instance3);\/\/false\n \n\/\/        System.out.println(\"--------------\");\n\/\/        ClassPathXmlApplicationContext con = new ClassPathXmlApplicationContext(\"spring-ioc.xml\");\n\/\/        Object user2 = con.getBean(\"user\");\n\/\/        System.out.println(user2);\n \n        \/**\n         * class.newInstance();\u5e95\u5c42\u4f7f\u7528\u7684\u662f\u53cd\u5c04\u51fa\u7684\u65e0\u53c2\u7684\u6784\u9020\u5668\uff0c\u9700\u8981\u53ef\u89c1\n         * Constructor.newInstance()\u2019\uff1b\u4efb\u4f55\u7684\u6784\u9020\u5668\u90fd\u80fd\u591f\u6784\u9020\u51fa\u4e00\u4e2a\u5b9e\u4f8b\uff0cprivate\u4e5f\u53ef\u4ee5\n         *\/\n \n \n    }\n}\u00a0<\/pre>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>\u4ee3\u7406\u95ee\u9898<\/h2>\n<h3>\u4ee3\u7406<\/h3>\n<h4>\u4ec0\u4e48\u662f\u4ee3\u7406<\/h4>\n<p>\u4ee3\u7406\u4e5f\u88ab\u53eb\u505a\u7f51\u7edc\u4ee3\u7406\uff0c\u662f\u4e00\u79cd\u6bd4\u8f83\u7279\u6b8a\u7684\u7f51\u7edc\u670d\u52a1\uff0c<strong>\u5141\u8bb8\u4e00\u4e2a\u7ec8\u7aef\uff08\u901a\u5e38\u6307\u5ba2\u6237\u7aef\uff09\u901a\u8fc7\u8fd9\u4e2a\u670d\u52a1\u4e0e\u53e6\u4e00\u4e2a\u7ec8\u7aef\uff08\u901a\u5e38\u6307\u670d\u52a1\u5668\u7aef\uff09\u8fdb\u884c\u975e\u76f4\u63a5\u7684\u8fde\u63a5\u3002<\/strong>\u4f8b\u5982\uff1a\u4e00\u4e9b\u7f51\u5173\u3001\u8def\u7531\u5668\u7b49\u7f51\u7edc\u8bbe\u5907\u90fd\u5177\u5907\u7f51\u7edc\u4ee3\u7406\u7684\u529f\u80fd\u3002\u4ee3\u7406\u670d\u52a1\u6709\u5229\u4e8e\u4fdd\u969c\u7f51\u7edc\u7ec8\u7aef\u7684\u9690\u79c1\u6216\u8005\u5b89\u5168\uff0c\u53ef\u4ee5\u5728\u4e00\u5b9a\u7a0b\u5ea6\u4e0a\u963b\u6b62\u7f51\u7edc\u653b\u51fb\uff08\u56e0\u4e3a\u901a\u8fc7\u4ee3\u7406\uff0c\u53ef\u4ee5\u9690\u85cf\u771f\u6b63\u7684\u670d\u52a1\u5668\u7aef\/\u5ba2\u6237\u7aef\uff09<\/p>\n<h4>\u4ee3\u7406\u670d\u52a1\u5668<\/h4>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/image75b64587d83eac09.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/image75b64587d83eac09.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h4>\u4ee3\u7406\u8fc7\u7a0b<\/h4>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imagef44ae5959651b543.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imagef44ae5959651b543.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h4>\u4ee3\u7406\u534f\u8bae<\/h4>\n<p>\u4e3b\u8981\u6709socks\u548chttp<\/p>\n<h5>socks\u548chttp\u4ee3\u7406\u7684\u533a\u522b<\/h5>\n<p>socks\u4ee3\u7406\uff1a<\/p>\n<ul>\n<li>\u5de5\u4f5c\u539f\u7406\uff1a SOCKS \u4ee3\u7406\u662f\u4e00\u79cd\u66f4\u5e95\u5c42\u7684\u4ee3\u7406\uff0c\u5b83\u53ea\u5904\u7406\u7f51\u7edc\u8fde\u63a5\uff0c\u5e76\u4e0d\u89e3\u6790 HTTP \u8bf7\u6c42\u3002\u5b83\u5c31\u50cf\u4e00\u4e2a\u201c\u96a7\u9053\u201d\uff0c\u5c06\u5ba2\u6237\u7aef\u7684\u7f51\u7edc\u8bf7\u6c42\u8f6c\u53d1\u5230\u76ee\u6807\u670d\u52a1\u5668\u3002<\/li>\n<li>\u652f\u6301\u534f\u8bae\uff1a SOCKS \u4ee3\u7406\u4e3b\u8981\u652f\u6301 TCP \u548c UDP \u534f\u8bae\uff0c\u53ef\u4ee5\u7528\u4e8e\u5404\u79cd\u7f51\u7edc\u5e94\u7528\uff0c\u4f8b\u5982 HTTP\u3001HTTPS\u3001FTP\u3001SSH \u7b49\u3002<\/li>\n<li>\u900f\u660e\u6027\uff1a SOCKS \u4ee3\u7406\u5bf9\u5ba2\u6237\u7aef\u548c\u76ee\u6807\u670d\u52a1\u5668\u662f\u900f\u660e\u7684\uff0c\u8fd9\u610f\u5473\u7740\u76ee\u6807\u670d\u52a1\u5668\u4e0d\u77e5\u9053\u5ba2\u6237\u7aef\u7684\u771f\u5b9e IP \u5730\u5740\u3002<\/li>\n<li>\u5b89\u5168\u6027\uff1a SOCKS \u4ee3\u7406\u672c\u8eab\u4e0d\u63d0\u4f9b\u4efb\u4f55\u52a0\u5bc6\u6216\u8eab\u4efd\u9a8c\u8bc1\uff0c\u56e0\u6b64\u5b89\u5168\u6027\u4f9d\u8d56\u4e8e\u5e95\u5c42\u7f51\u7edc\u8fde\u63a5\u7684\u5b89\u5168\u6027\u3002<\/li>\n<\/ul>\n<p>http\u4ee3\u7406\uff1a<\/p>\n<ul>\n<li>\u5de5\u4f5c\u539f\u7406\uff1a HTTP \u4ee3\u7406\u4e13\u95e8\u5904\u7406 HTTP \u8bf7\u6c42\uff0c\u5b83\u4f1a\u89e3\u6790 HTTP \u8bf7\u6c42\u5e76\u6839\u636e\u9700\u8981\u4fee\u6539\u8bf7\u6c42\u5934\u548c\u8bf7\u6c42\u5185\u5bb9\uff0c\u7136\u540e\u5c06\u8bf7\u6c42\u8f6c\u53d1\u5230\u76ee\u6807\u670d\u52a1\u5668\u3002<\/li>\n<li>\u652f\u6301\u534f\u8bae\uff1a HTTP \u4ee3\u7406\u53ea\u652f\u6301 HTTP \u534f\u8bae\uff0c\u53ea\u80fd\u7528\u4e8e\u5904\u7406 HTTP \u8bf7\u6c42\u3002<\/li>\n<li>\u975e\u900f\u660e\u6027\uff1a HTTP \u4ee3\u7406\u5bf9\u76ee\u6807\u670d\u52a1\u5668\u662f\u4e0d\u900f\u660e\u7684\uff0c\u76ee\u6807\u670d\u52a1\u5668\u53ef\u4ee5\u83b7\u53d6\u5ba2\u6237\u7aef\u7684\u771f\u5b9e IP \u5730\u5740\u3002<\/li>\n<li>\u5b89\u5168\u6027\uff1a HTTP \u4ee3\u7406\u901a\u5e38\u63d0\u4f9b\u4e00\u4e9b\u5b89\u5168\u529f\u80fd\uff0c\u4f8b\u5982\u8eab\u4efd\u9a8c\u8bc1\u3001\u52a0\u5bc6\u7b49\uff0c\u4ee5\u63d0\u9ad8\u5b89\u5168\u6027\u3002<\/li>\n<\/ul>\n<h5>\u533a\u522b\u603b\u7ed3<\/h5>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imagea82ab1b7e1ff7c59.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imagea82ab1b7e1ff7c59.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h5>\u4e8c\u8005\u4ee3\u7406\u8fc7\u7a0b<\/h5>\n<p>1.HTTP\u4ee3\u7406\uff1a<\/p>\n<p>\u89e3\u6790\u51fa\u7684\u5730\u5740\u548c\u7aef\u53e3\uff1a \u901a\u5e38\u662f\u4ee3\u7406\u670d\u52a1\u5668\u7684 IP \u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002<br \/>\u8fde\u63a5\u65b9\u5f0f\uff1a OkHttp \u4f7f\u7528 HTTP \u534f\u8bae\u5411\u4ee3\u7406\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\uff0c\u8bf7\u6c42\u4e2d\u5305\u542b\u76ee\u6807\u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002\u4ee3\u7406\u670d\u52a1\u5668\u6536\u5230\u8bf7\u6c42\u540e\uff0c\u4f1a\u5c06\u8bf7\u6c42\u8f6c\u53d1\u7ed9\u76ee\u6807\u670d\u52a1\u5668\uff0c\u5e76\u63a5\u6536\u76ee\u6807\u670d\u52a1\u5668\u7684\u54cd\u5e94\uff0c\u518d\u5c06\u54cd\u5e94\u8f6c\u53d1\u7ed9\u5ba2\u6237\u7aef\u3002<br \/>\u4e3e\u4f8b\uff1a<\/p>\n<p>\u5047\u8bbe\u60a8\u8981\u8bbf\u95ee\u7f51\u7ad9 www.example.com\uff0c\u4f7f\u7528 http:\/\/proxy.example.com:8080 \u4f5c\u4e3a HTTP \u4ee3\u7406\u670d\u52a1\u5668\u3002<\/p>\n<p>Proxy.Type.HTTP\uff1a OkHttp \u4f1a\u89e3\u6790\u51fa proxy.example.com \u548c 8080\u3002<\/p>\n<p>\u8fde\u63a5\u6d41\u7a0b\uff1a<br \/>OkHttp \u5411 proxy.example.com:8080 \u53d1\u9001\u4e00\u4e2a HTTP \u8bf7\u6c42\uff0c\u8bf7\u6c42\u4e2d\u5305\u542b\u76ee\u6807\u670d\u52a1\u5668 www.example.com \u7684\u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002<br \/>\u4ee3\u7406\u670d\u52a1\u5668\u6536\u5230\u8bf7\u6c42\u540e\uff0c\u4f1a\u5c06\u8bf7\u6c42\u8f6c\u53d1\u7ed9 www.example.com\u3002<br \/>www.example.com \u8fd4\u56de\u54cd\u5e94\u7ed9\u4ee3\u7406\u670d\u52a1\u5668\u3002<br \/>\u4ee3\u7406\u670d\u52a1\u5668\u5c06\u54cd\u5e94\u8f6c\u53d1\u7ed9 OkHttp\u3002<br \/>OkHttp \u6536\u5230\u54cd\u5e94\u5e76\u5904\u7406\u3002<\/p>\n<p>2. SOCKS \u4ee3\u7406<\/p>\n<p>\u534f\u8bae\uff1a SOCKS \u534f\u8bae (\u901a\u5e38\u662f SOCKS4 \u6216 SOCKS5)<br \/>\u89e3\u6790\u51fa\u7684\u5730\u5740\u548c\u7aef\u53e3\uff1a \u901a\u5e38\u662f\u4ee3\u7406\u670d\u52a1\u5668\u7684 IP \u5730\u5740\u548c\u7aef\u53e3\u53f7\u3002<br \/>\u8fde\u63a5\u65b9\u5f0f\uff1a OkHttp \u4f7f\u7528 SOCKS \u534f\u8bae\u4e0e\u4ee3\u7406\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\uff0c\u5e76\u5c06\u76ee\u6807\u670d\u52a1\u5668\u7684\u5730\u5740\u548c\u7aef\u53e3\u53f7\u4f20\u9012\u7ed9\u4ee3\u7406\u670d\u52a1\u5668\u3002\u4ee3\u7406\u670d\u52a1\u5668\u8d1f\u8d23\u5c06\u8fde\u63a5\u8f6c\u53d1\u5230\u76ee\u6807\u670d\u52a1\u5668\uff0c\u5e76\u8fdb\u884c\u6570\u636e\u8f6c\u53d1\u3002<br \/>\u4e3e\u4f8b\uff1a<\/p>\n<p>\u5047\u8bbe\u60a8\u8981\u8bbf\u95ee\u7f51\u7ad9 www.example.com\uff0c\u4f7f\u7528 socks:\/\/proxy.example.com:1080 \u4f5c\u4e3a SOCKS5 \u4ee3\u7406\u670d\u52a1\u5668\u3002<\/p>\n<p>Proxy.Type.SOCKS\uff1a OkHttp \u4f1a\u89e3\u6790\u51fa proxy.example.com \u548c 1080\u3002<\/p>\n<p>\u8fde\u63a5\u6d41\u7a0b\uff1a<br \/>OkHttp \u4f7f\u7528 SOCKS5 \u534f\u8bae\u4e0e proxy.example.com:1080 \u5efa\u7acb\u8fde\u63a5\u3002<br \/>OkHttp \u5c06 www.example.com \u7684\u5730\u5740\u548c\u7aef\u53e3\u53f7\u4f20\u9012\u7ed9\u4ee3\u7406\u670d\u52a1\u5668\u3002<br \/>\u4ee3\u7406\u670d\u52a1\u5668\u8d1f\u8d23\u5c06\u8fde\u63a5\u8f6c\u53d1\u5230 www.example.com\u3002<br \/>OkHttp \u4e0e www.example.com \u8fdb\u884c\u6570\u636e\u901a\u4fe1\uff0c\u6240\u6709\u6570\u636e\u90fd\u4f1a\u901a\u8fc7\u4ee3\u7406\u670d\u52a1\u5668\u8f6c\u53d1\u3002<\/p>\n<p>\u9009\u62e9\u54ea\u79cd\u4ee3\u7406\uff1a<\/p>\n<p>\u5982\u679c\u9700\u8981\u4ee3\u7406\u5404\u79cd\u7f51\u7edc\u5e94\u7528\uff0c\u4f8b\u5982 HTTP\u3001HTTPS\u3001FTP\u3001SSH \u7b49\uff0c\u53ef\u4ee5\u9009\u62e9 SOCKS \u4ee3\u7406\u3002<br \/>\u5982\u679c\u53ea\u5904\u7406 HTTP \u8bf7\u6c42\uff0c\u5e76\u4e14\u9700\u8981\u4e00\u4e9b\u5b89\u5168\u529f\u80fd\uff0c\u53ef\u4ee5\u9009\u62e9 HTTP \u4ee3\u7406\u3002<\/p>\n<hr \/>\n<h3>\u6b63\u5411\u4ee3\u7406<\/h3>\n<p>\u6b63\u5411\u4ee3\u7406\uff0c\u4ee3\u7406\u670d\u52a1\u5668\u5728\u5ba2\u6237\u7aef<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/image8db9e7dd29553c79.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/image8db9e7dd29553c79.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u6b63\u5411\u4ee3\u7406\u8fc7\u7a0b<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imageab3e930b510ed1ad.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imageab3e930b510ed1ad.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u6b63\u5411\u4ee3\u7406\u9002\u7528\u573a\u666f<\/p>\n<ul>\n<li>\u8bbf\u95ee\u88ab\u7981\u6b62\u7684\u8d44\u6e90\uff08\u8ba9\u5ba2\u6237\u7aef\u8bbf\u95ee\u539f\u672c\u4e0d\u80fd\u8bbf\u95ee\u7684\u670d\u52a1\u5668\u3002\u53ef\u80fd\u662f\u7531\u4e8e\u8def\u7531\u7684\u539f\u56e0\uff0c\u6216\u8005\u7b56\u7565\u914d\u7f6e\u7684\u539f\u56e0\uff0c\u5ba2\u6237\u7aef\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u67d0\u4e9b\u670d\u52a1\u5668\u3002\u4e3a\u4e86\u8bbf\u95ee\u8fd9\u4e9b\u670d\u52a1\u5668\uff0c\u53ef\u901a\u8fc7\u4ee3\u7406\u670d\u52a1\u5668\u6765\u8bbf\u95ee\uff09<br \/>\u7a81\u7834\u7f51\u7edc\u5ba1\u67e5<\/li>\n<li>\u518d\u6bd4\u5982\u5ba2\u6237\u7aefIP\u88ab\u670d\u52a1\u5668\u5c01\u7981\uff0c\u53ef\u4ee5\u7ed5\u8fc7IP\u5c01\u7981<br \/>\u4e5f\u53ef\u4ee5\u7a81\u7834\u7f51\u7ad9\u7684\u533a\u57df\u9650\u5236<br \/>\u9690\u85cf\u5ba2\u6237\u7aef\u7684\u5730\u5740\uff08\u5bf9\u4e8e\u88ab\u8bf7\u6c42\u7684\u670d\u52a1\u5668\u800c\u8a00\uff0c\u4ee3\u7406\u670d\u52a1\u5668\u4ee3\u8868\u4e86\u5ba2\u6237\u7aef\uff0c\u6240\u4ee5\u5728\u670d\u52a1\u5668\u6216\u8005\u7f51\u7edc\u62d3\u6251\u4e0a\uff0c\u770b\u4e0d\u5230\u539f\u59cb\u5ba2\u6237\u7aef\uff09<\/li>\n<li>\u8fdb\u884c\u5ba2\u6237\u8bbf\u95ee\u63a7\u5236<br \/>\u53ef\u4ee5\u96c6\u4e2d\u90e8\u7f72\u7b56\u7565\uff0c\u63a7\u5236\u5ba2\u6237\u7aef\u7684\u8bbf\u95ee\u884c\u4e3a\uff08\u8bbf\u95ee\u8ba4\u8bc1\u7b49\uff09<br \/>\u8bb0\u5f55\u7528\u6237\u8bbf\u95ee\u8bb0\u5f55\uff08\u4e0a\u7f51\u884c\u4e3a\u7ba1\u7406\uff09<br \/>\u5185\u90e8\u8d44\u6e90\u7684\u63a7\u5236\uff08\u516c\u53f8\u3001\u6559\u80b2\u7f51\u7b49\uff09<\/li>\n<li>\u52a0\u901f\u8bbf\u95ee\u8d44\u6e90<br \/>\u4f7f\u7528\u7f13\u51b2\u7279\u6027\u51cf\u5c11\u7f51\u7edc\u4f7f\u7528\u7387\uff08\u4ee3\u7406\u670d\u52a1\u5668\u8bbe\u7f6e\u4e00\u4e2a\u8f83\u5927\u7684\u7f13\u51b2\u533a\uff0c\u5f53\u6709\u5916\u754c\u7684\u4fe1\u606f\u901a\u8fc7\u65f6\uff0c\u540c\u65f6\u4e5f\u5c06\u5176\u4fdd\u5b58\u5230\u7f13\u51b2\u533a\u4e2d\uff0c\u5f53\u5176\u4ed6\u7528\u6237\u518d\u8bbf\u95ee\u76f8\u540c\u7684\u4fe1\u606f\u65f6\uff0c \u5219\u76f4\u63a5\u7531\u7f13\u51b2\u533a\u4e2d\u53d6\u51fa\u4fe1\u606f\uff0c\u4f20\u7ed9\u7528\u6237\uff0c\u4ee5\u63d0\u9ad8\u8bbf\u95ee\u901f\u5ea6\u3002\uff09<\/li>\n<li>\u8fc7\u6ee4\u5185\u5bb9\uff08\u53ef\u4ee5\u901a\u8fc7\u4ee3\u7406\u670d\u52a1\u5668\u7edf\u4e00\u8fc7\u6ee4\u4e00\u4e9b\u5371\u9669\u7684\u6307\u4ee4\/\u7edf\u4e00\u52a0\u5bc6\u4e00\u4e9b\u5185\u5bb9\u3001\u9632\u5fa1\u4ee3\u7406\u670d\u52a1\u5668\u4e24\u7aef\u7684\u4e00\u4e9b\u653b\u51fb\u6027\u884c\u4e3a\uff09<\/li>\n<\/ul>\n<hr \/>\n<h3>\u53cd\u5411\u4ee3\u7406<\/h3>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/16\/imagec1ba5e74e8be77a3.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/16\/imagec1ba5e74e8be77a3.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u53cd\u5411\u4ee3\u7406\u9002\u7528\u573a\u666f<\/p>\n<ul>\n<li>\u8d1f\u8f7d\u5747\u8861<br \/>\u5982\u679c\u670d\u52a1\u5668\u96c6\u7fa4\u4e2d\u6709\u8d1f\u8377\u8f83\u9ad8\u8005\uff0c\u53cd\u5411\u4ee3\u7406\u901a\u8fc7URL\u91cd\u5199\uff0c\u6839\u636e\u8fde\u7ebf\u8bf7\u6c42\u4ece\u8d1f\u8377\u8f83\u4f4e\u8005\u83b7\u53d6\u4e0e\u6240\u9700\u76f8\u540c\u7684\u8d44\u6e90\u6216\u5907\u63f4\u3002\u53ef\u4ee5\u6709\u6548\u964d\u4f4e\u670d\u52a1\u5668\u538b\u529b\uff0c\u589e\u52a0\u670d\u52a1\u5668\u7a33\u5b9a\u6027<\/li>\n<li>\u63d0\u5347\u670d\u52a1\u5668\u5b89\u5168\u6027<br \/>\u53ef\u4ee5\u5bf9\u5ba2\u6237\u7aef\u9690\u85cf\u670d\u52a1\u5668\u7684IP\u5730\u5740<br \/>\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u5e94\u7528\u5c42\u9632\u706b\u5899\uff0c\u4e3a\u7f51\u7ad9\u63d0\u4f9b\u5bf9\u57fa\u4e8eWeb\u7684\u653b\u51fb\u884c\u4e3a\uff08\u4f8b\u5982DoS\/DDoS\uff09\u7684\u9632\u62a4\uff0c\u66f4\u5bb9\u6613\u6392\u67e5\u6076\u610f\u8f6f\u4ef6\u7b49<\/li>\n<li>\u52a0\u5bc6\/SSL\u52a0\u901f\uff1a\u5c06SSL\u52a0\u5bc6\u5de5\u4f5c\u4ea4\u7531\u914d\u5907\u4e86SSL\u786c\u4ef6\u52a0\u901f\u5668\u7684\u53cd\u5411\u4ee3\u7406\u6765\u5b8c\u6210\u63d0\u4f9b<\/li>\n<li>\u7f13\u5b58\u670d\u52a1\uff0c\u52a0\u901f\u5ba2\u6237\u7aef\u8bbf\u95ee<\/li>\n<li>\u5bf9\u4e8e\u9759\u6001\u5185\u5bb9\u53ca\u77ed\u65f6\u95f4\u5185\u6709\u5927\u91cf\u8bbf\u95ee\u8bf7\u6c42\u7684\u52a8\u6001\u5185\u5bb9\u63d0\u4f9b\u7f13\u5b58\u670d\u52a1<\/li>\n<li>\u6570\u636e\u7edf\u4e00\u538b\u7f29<\/li>\n<li>\u8282\u7ea6\u5e26\u5bbd<\/li>\n<li>\u4e3a\u7f51\u7edc\u5e26\u5bbd\u4e0d\u597d\u7684\u7f51\u7edc\u63d0\u4f9b\u670d\u52a1<\/li>\n<li>\u7edf\u4e00\u7684\u8bbf\u95ee\u6743\u9650\u63a7\u5236<\/li>\n<li>\u7edf\u4e00\u7684\u8bbf\u95ee\u63a7\u5236<\/li>\n<li>\u7a81\u7834\u4e92\u8054\u7f51\u7684\u5c01\u9501<\/li>\n<li>\u4e3a\u5728\u79c1\u6709\u7f51\u7edc\u4e0b\uff08\u5982\u5c40\u57df\u7f51\uff09\u7684\u670d\u52a1\u5668\u96c6\u7fa4\u63d0\u4f9bNAT\u7a7f\u900f\u53ca\u5916\u7f51\u53d1\u5e03\u670d\u52a1<\/li>\n<li>\u4e0a\u4f20\u4e0b\u8f7d\u51cf\u901f\u63a7\u5236<\/li>\n<\/ul>\n<h3>\u6b63\u5411\u4ee3\u7406\u4e0e\u53cd\u5411\u4ee3\u7406\u7684\u5f02\u540c<\/h3>\n<ol>\n<li>\u6b63\u5411\u4ee3\u7406\u5728\u5ba2\u6237\u7aef\uff0c\u53cd\u5411\u4ee3\u7406\u5728\u670d\u52a1\u7aef<\/li>\n<li>\u4ee3\u7406\u670d\u52a1\u5668\u5747\u627f\u62c5\u6536\u53d1\u8bf7\u6c42\u548c\u54cd\u5e94\u7684\u529f\u80fd<\/li>\n<\/ol>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>\u5173\u4e8ejava\u7684\u9762\u5411\u5bf9\u8c61<\/h2>\n<p>\u9762\u5411\u5bf9\u8c61\u4e09\u5927\u7279\u5f81\uff1a\u5c01\u88c5\uff0c\u7ee7\u627f,\u591a\u6001<\/p>\n<h3>\u5c01\u88c5<\/h3>\n<p>\u5c01\u88c5\u662f\u5957\u58f3\u5c4f\u853d\u7ec6\u8282\uff0c\u5bf9\u5916\u53ea\u63d0\u4f9b\u63a5\u53e3\u548c\u5bf9\u8c61\u8fdb\u884c\u4ea4\u4e92<\/p>\n<p>java\u7684\u5c01\u88c5\u9760\u4e00\u4e9b\u8bbf\u95ee\u9650\u5236\u7b26\u53f7\uff0c\u5982:public,private,protected,default<\/p>\n<p>\u8fd8\u6709java\u7684\u5bfc\u5305\u8fc7\u7a0b\uff0c\u8fd9\u4e5f\u662f\u5c01\u88c5\u601d\u60f3\u7684\u4f53\u73b0<\/p>\n<h3>\u7ee7\u627f<\/h3>\n<p>\u57fa\u4e8e\u4e00\u4e2a\u7c7b\u6784\u9020\u65b0\u7c7b\uff0c\u7ee7\u627f\u5df2\u5b58\u5728\u7684\u7c7b\u5c31\u662f\u590d\u7528\u8fd9\u4e9b\u7c7b\u7684\u65b9\u6cd5\u548c\u5c5e\u6027\u3002\u5728\u6b64\u57fa\u7840\u4e0a\u8fd8\u53ef\u4ee5\u6dfb\u52a0\u4e00\u4e9b\u65b0\u7684\u65b9\u6cd5\u548c\u5c5e\u6027\u4ee5\u6ee1\u8db3\u65b0\u7684\u9700\u6c42\u3002\u901a\u8fc7\u7ee7\u627f\uff0c\u53ef\u4ee5\u8fbe\u5230\u5bf9\u91cd\u590d\u4ee3\u7801\u590d\u7528\uff0c\u51cf\u5c11\u4ee3\u7801\u91cf\u3002<\/p>\n<p>\u7ee7\u627f\u4e3b\u8981\u89e3\u51b3\u4e86\u5171\u6027\u62bd\u53d6\uff0c\u5b9e\u73b0\u4ee3\u7801\u590d\u7528<\/p>\n<h3>\u591a\u6001<\/h3>\n<p>\u591a\u6001\u901a\u4fd7\u6765\u8bb2\uff0c\u5c31\u662f\u591a\u79cd\u5f62\u6001\uff0c\u5177\u4f53\u70b9\u5c31\u662f\u53bb\u5b8c\u6210\u67d0\u4e2a\u884c\u4e3a\uff0c\u5f53\u4e0d\u540c\u7684\u5bf9\u8c61\u53bb\u5b8c\u6210\u65f6\u4f1a\u4ea7\u751f\u51fa\u4e0d\u540c\u7684\u72b6\u6001\u3002<\/p>\n<p>\u5728Java\u4e2d\u8981\u5b9e\u73b0\u591a\u6001\uff0c\u5c31\u5fc5\u987b\u5728\u7ee7\u627f\u4f53\u7cfb\u4e0b\uff0c\u4e14\u5b50\u7c7b\u5fc5\u987b\u5bf9\u7236\u7c7b\u4e2d\u7684\u65b9\u6cd5\u8fdb\u884c\u91cd\u5199\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7\u7236\u7c7b\u7684\u5f15\u7528\u8c03\u7528\u91cd\u5199\u7684\u65b9\u6cd5<\/p>\n<p>\u591a\u6001\u4f53\u73b0\uff1a\u5728\u4ee3\u7801\u8fd0\u884c\u65f6\uff0c\u5f53\u4f20\u9012\u4e0d\u540c\u7c7b\u5bf9\u8c61\u65f6\uff0c\u4f1a\u8c03\u7528\u5bf9\u5e94\u7c7b\u4e2d\u7684\u65b9\u6cd5<\/p>\n<p><strong>\u91cd\u5199\u548c\u91cd\u8f7d\u7684\u533a\u522b<\/strong><\/p>\n<p>1\u3001\u91cd\u5199\u7684\u53c2\u6570\u5217\u8868\u4e00\u5b9a\u4e0d\u80fd\u4fee\u6539\uff0c\u800c\u91cd\u8f7d\u7684\u53c2\u6570\u5217\u8868\u5fc5\u987b\u4fee\u6539<\/p>\n<p>2\u3001\u91cd\u5199\u7684\u8fd4\u56de\u7c7b\u578b\u4e0d\u80fd\u4fee\u6539\uff0c\u9664\u975e\u53ef\u4ee5\u6784\u6210\u7236\u5b50\u7c7b\u5173\u7cfb\uff0c\u91cd\u8f7d\u7684\u8fd4\u56de\u7c7b\u578b\u53ef\u4ee5\u4fee\u6539<\/p>\n<p>3\u3001\u91cd\u5199\u7684\u8bbf\u95ee\u6743\u9650\u4e0d\u80fd\u4f4e\u4e8e\u7236\u7c7b\u7684\u8bbf\u95ee\u6743\u9650\uff0c\u800c\u91cd\u8f7d\u53ef\u4ee5\u4fee\u6539\u8bbf\u95ee\u9650\u5b9a\u7b26<\/p>\n<p>4\u3001\u91cd\u8f7d\u662f\u4e00\u4e2a\u7c7b\u7684\u591a\u6001\u6027\u8868\u73b0\uff0c\u800c\u91cd\u5199\u662f\u5b50\u7c7b\u4e0e\u7236\u7c7b\u7684\u4e00\u79cd\u591a\u6001\u6027\u8868\u73b0<\/p>\n<p><strong>\u9759\u6001\u7ed1\u5b9a(Static Binding):<\/strong>\u4e5f\u79f0\u4e3a\u524d\u671f\u7ed1\u5b9a(\u65e9\u7ed1\u5b9a)\uff0c\u5728\u7f16\u8bd1\u65f6\u5c31\u786e\u5b9a\u8981\u8c03\u7528\u7684\u65b9\u6cd5\u3002\u5f53\u6211\u4eec\u4f7f\u7528\u5bf9\u8c61\u8c03\u7528\u4e00\u4e2a\u65b9\u6cd5\u65f6\uff0c\u7f16\u8bd1\u5668\u4f1a\u6839\u636e\u5f15\u7528\u53d8\u91cf\u7684\u7c7b\u578b\u6765\u786e\u5b9a\u8981\u8c03\u7528\u7684\u65b9\u6cd5\uff0c\u800c\u4e0d\u662f\u6839\u636e\u5b9e\u9645\u8fd0\u884c\u65f6\u5bf9\u8c61\u7684\u7c7b\u578b\u3002\u8fd9\u79cd\u7ed1\u5b9a\u53d1\u751f\u5728\u7f16\u8bd1\u9636\u6bb5\u3002\u9759\u6001\u7ed1\u5b9a\u9002\u7528\u4e8e\u9759\u6001\u65b9\u6cd5\u548c\u79c1\u6709\u65b9\u6cd5\u7b49\u65e0\u6cd5\u88ab\u7ee7\u627f\u548c\u8986\u76d6\u7684\u65b9\u6cd5\u3002\u5178\u578b\u4ee3\u8868\u65b9\u6cd5\u91cd\u8f7d\u3002<\/p>\n<p><strong>\u52a8\u6001\u7ed1\u5b9a(Dynamic Binding):<\/strong>\u4e5f\u79f0\u4e3a\u540e\u671f\u7ed1\u5b9a(\u665a\u7ed1\u5b9a)\uff0c\u5728\u8fd0\u884c\u65f6\u6839\u636e\u5b9e\u9645\u5bf9\u8c61\u7684\u7c7b\u578b\u6765\u786e\u5b9a\u8981\u8c03\u7528\u7684\u65b9\u6cd5\u3002\u5f53\u6211\u4eec\u4f7f\u7528\u7236\u7c7b\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61\uff0c\u5e76\u901a\u8fc7\u8be5\u5f15\u7528\u8c03\u7528\u4e00\u4e2a\u88ab\u5b50\u7c7b\u91cd\u5199\u7684\u65b9\u6cd5\u65f6\uff0c\u4f1a\u6839\u636e\u5b9e\u9645\u8fd0\u884c\u65f6\u5bf9\u8c61\u7684\u7c7b\u578b\u6765\u51b3\u5b9a\u8981\u8c03\u7528\u7684\u65b9\u6cd5\uff0c\u800c\u4e0d\u662f\u6839\u636e\u5f15\u7528\u53d8\u91cf\u7684\u7c7b\u578b\u3002\u8fd9\u79cd\u7ed1\u5b9a\u53d1\u751f\u5728\u8fd0\u884c\u9636\u6bb5\uff0c\u56e0\u6b64\u4e5f\u88ab\u79f0\u4e3a\u665a\u671f\u7ed1\u5b9a\u3002\u52a8\u6001\u7ed1\u5b9a\u5b9e\u73b0\u4e86\u591a\u6001\u7684\u7279\u6027\uff0c\u5141\u8bb8\u5728\u8fd0\u884c\u65f6\u6839\u636e\u5bf9\u8c61\u7684\u5b9e\u9645\u7c7b\u578b\u9009\u62e9\u5177\u4f53\u7684\u65b9\u6cd5\u5b9e\u73b0\u3002<\/p>\n<\/p>\n<p><strong>\u5411\u4e0a\u8f6c\u578b\u548c\u5411\u4e0b\u8f6c\u578b<\/strong><\/p>\n<p>\u5411\u4e0a\u8f6c\u578b\uff0cJAVA\u4e2d\u7684\u4e00\u79cd\u8c03\u7528\u65b9\u5f0f\u3002\u5411\u4e0a\u8f6c\u578b\u662f\u5bf9\u7236\u7c7b\u7684\u5bf9\u8c61\u7684\u65b9\u6cd5\u7684\u6269\u5145\uff0c\u5373\u7236\u7c7b\u7684\u5bf9\u8c61\u53ef\u8bbf\u95ee\u5b50\u7c7b\u4ece\u7236\u7c7b\u4e2d\u7ee7\u627f\u6765\u7684\u548c\u5b50\u7c7b\u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5\u3002\u5411\u4e0a\u8f6c\u578b\u540e\uff0c\u5b50\u7c7b\u4e0d\u80fd\u4f7f\u7528\u539f\u6765\u5b50\u7c7b\u4e2d\u7279\u6709\u7684\u5b57\u6bb5\uff0c\u548c\u65b9\u6cd5<\/p>\n<p>\u8bed\u6cd5\u683c\u5f0f\uff1a\u7236\u7c7b\u7c7b\u578b \u5bf9\u8c61\u540d = new \u5b50\u7c7b\u5bf9\u8c61<\/p>\n<pre class=\"code\"> public class Animal {<br \/>String name;<br \/>int age;<br \/><br \/>public Animal(String name, int age) {<br \/>this.name = name;<br \/>this.age = age;<br \/>}<br \/><br \/>public void eat() {<br \/>System.out.println(name + \"\u6b63\u5728\u5403\u996d\");<br \/>}<br \/>}<br \/><br \/>public class Dog extends Animal{<br \/>public Dog(String name,int age){<br \/>super(name,age);<br \/>}<br \/><br \/>@Override<br \/>\/\/\u91cd\u5199\u7236\u7c7b\u7684eat()\u65b9\u6cd5<br \/>public void eat() {<br \/>System.out.println(name + \"\u6b63\u5728\u5403\u72d7\u7cae\");<br \/>}<br \/><br \/>public void lookDoor(){<br \/>System.out.println(name + \"\u5728\u770b\u95e8\");<br \/>}<br \/>}<br \/><br \/>public class Test {<br \/>public static void main(String[] args) {<br \/>Animal dog = new Dog(\"\u65fa\u8d22\",2);\/\/\u76f4\u63a5\u4f20\u53c2\uff0c\u4f7f\u7528\u5b50\u7c7b\u5bf9\u8c61\u8d4b\u503c\u7ed9\u7236\u7c7b\u5bf9\u8c61<br \/>dog.eat();<br \/>dog.lookDoor()\/\/\u7f16\u8bd1\u62a5\u9519\u3002\u4e0d\u80fd\u8c03\u7528\u5b50\u7c7b\u7279\u6709\u7684\u65b9\u6cd5\u3002<br \/>}<br \/>}<\/pre>\n<p>\u5411\u4e0b\u8f6c\u578b<\/p>\n<p>\u00a0\u5c06\u4e00\u4e2a\u5b50\u7c7b\u5bf9\u8c61\u7ecf\u8fc7\u5411\u4e0a\u8f6c\u578b\u4e4b\u540e\u5f53\u6210\u7236\u7c7b\u65b9\u6cd5\u4f7f\u7528\uff0c\u518d\u65e0\u6cd5\u8c03\u7528\u5b50\u7c7b\u7684\u65b9\u6cd5\uff0c\u4f46\u6709\u65f6\u5019\u53ef\u80fd\u9700\u8981\u8c03\u7528\u5b50\u7c7b\u7279\u6709\u7684\u65b9\u6cd5\uff0c\u6b64\u65f6\uff1a\u5c06\u7236\u7c7b\u5f15\u7528\u518d\u8fd8\u539f\u4e3a\u5b50\u7c7b\u5bf9\u8c61\u5373\u53ef\uff0c\u5373\u5411\u4e0b\u8f6c\u578b\u3002<\/p>\n<pre class=\"code\">public class Test {<br \/>public static void main(String[] args) {<br \/>Dog dog = new Dog(\"\u65fa\u8d22\",2);<br \/>\/\/\u5411\u4e0a\u8f6c\u578b<br \/>Animal animal1 = dog;<br \/>if(animal1 instanceof Dog){\/\/\u5224\u65ad\u662f\u5426\u53ef\u4ee5\u5b89\u5168\u8f6c\u6362<br \/>dog = (Dog)animal1;<br \/>dog.lookDoor();<br \/>}<br \/>}<br \/>} <\/pre>\n<p><strong>\u591a\u6001\u7684\u4f18\u7f3a\u70b9<\/strong><\/p>\n<ul>\n<li><strong>\u4f18\u70b9<\/strong><\/li>\n<\/ul>\n<ol>\n<li>\u53ef\u4ee5\u964d\u4f4e\u4ee3\u7801\u7684\u5708\u590d\u6742\u5ea6\u907f\u514d\u4f7f\u7528\u5927\u91cf\u7684if-else.\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002<\/li>\n<li>\u589e\u5f3a\u4e86\u4ee3\u7801\u7684\u53ef\u6269\u5c55\u6027\uff0c\u964d\u4f4e\u4ee3\u7801\u7684\u4fee\u6539\u6210\u672c<\/li>\n<\/ol>\n<ul>\n<li><strong>\u7f3a\u70b9<br \/><\/strong>\u964d\u4f4e\u4ee3\u7801\u8fd0\u884c\u6548\u7387<\/li>\n<\/ul>\n<p>\uff0c<\/p>\n<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>Redis Lua\u811a\u672c\u7406\u89e3<\/h2>\n<p>Lua \u672c\u8eab\u662f\u4e00\u79cd\u8f7b\u91cf\u5c0f\u5de7\u7684\u811a\u672c\u8bed\u8a00\uff0c\u5728Redis2.6\u7248\u672c\u5f00\u59cb\u5f15\u5165\u4e86\u5bf9Lua\u811a\u672c\u7684\u652f\u6301\u3002\u901a\u8fc7\u5728\u670d\u52a1\u5668\u4e2d\u5d4c\u5165Lua\u73af\u5883\uff0cRedis\u5ba2\u6237\u7aef\u5c31\u53ef\u4ee5\u4f7f\u7528Lua\u811a\u672c\uff0c\u76f4\u63a5\u5728\u670d\u52a1\u5668\u7aef\u539f\u5b50\u5730\u6267\u884c\u591a\u4e2aRedis\u547d\u4ee4\u3002\u5728Redis\u4e2dLua\u6709\u4e24\u79cd\u6267\u884c\u65b9\u5f0f\uff1a<strong>Eval\u548cEvalSHA<\/strong>\u3002<\/p>\n<h3>Eval<\/h3>\n<p>\u901a\u8fc7Redis\u5185\u7f6e\u7684 Lua \u89e3\u91ca\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528 EVAL \u547d\u4ee4\uff08\u4e5f\u53ef\u4ee5\u4f7f\u7528<span class=\"words-blog hl-git-1\" data-tit=\"redis-cli\" data-pretit=\"redis-cli\">redis-cli<\/span>\u00a0\u7684\u2013eval \u53c2\u6570\uff09\u5bf9 Lua \u811a\u672c\u8fdb\u884c\u89e3\u6790\u3002\u9700\u8981\u6ce8\u610f\u7684\u70b9\u662f\u6267\u884cLua\u4e5f\u4f1a\u4f7fRedis\u963b\u585e\u3002<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/20\/image2530433cbf9e828f.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/20\/image2530433cbf9e828f.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h4>eval\u6267\u884c\u6b65\u9aa4<\/h4>\n<ul>\n<li>\u6839\u636e\u5ba2\u6237\u7aef\u7ed9\u5b9a\u7684Lua\u811a\u672c\uff0c\u5728Lua\u73af\u5883\u4e2d\u5b9a\u4e49\u4e00\u4e2aLua\u51fd\u6570\uff0cLua\u51fd\u6570\u7684\u540d\u79f0\u5b9e\u9645\u4e0a\u662ff_\u4e3a\u524d\u7f00\u52a0\u4e0a\u811a\u672c\u672c\u8eab\u8ba1\u7b97\u51fa\u6765\u7684SHA1\u503c\u7ec4\u6210\uff0c\u5982f_ddfsdfjgjbg33rndgj00\uff0cSHA1\u7684\u957f\u5ea6\u662f40\u5b57\u7b26\uff0c\u800c\u51fd\u6570\u4f53\u5219\u662f\u811a\u672c\u672c\u8eab\u3002<\/li>\n<li>\u5c06\u5ba2\u6237\u7aef\u7ed9\u5b9a\u7684\u811a\u672c\u4fdd\u5b58\u5230lua_scripts\u5b57\u5178\uff0c\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u6dfb\u52a0\u4e00\u4e2akey-value\uff0ckey\u5c31\u662fLua\u811a\u672c\u7684SHA1\u6821\u9a8c\u548c\uff0c\u800c\u503c\u662fLua\u811a\u672c\u672c\u8eab\uff0c\u8fd9\u4e3b\u8981\u662f\u7528\u4e8e\u4ee5\u540e\u4f7f\u7528\u3002<\/li>\n<li>\u6267\u884c\u7b2c\u4e00\u6b65\u5728Lua\u73af\u5883\u4e2d\u5b9a\u4e49\u7684\u51fd\u6570\uff0c\u4ee5\u6b64\u6765\u6267\u884c\u5ba2\u6237\u7aef\u4e2d\u7ed9\u5b9a\u7684Lua\u811a\u672c\u3002<\/li>\n<\/ul>\n<p>\u6837\u4f8b<\/p>\n<pre class=\"code\">eval  \u811a\u672c\u5185\u5bb9 key\u4e2a\u6570 key\u5217\u8868 \u53c2\u6570\u5217\u8868\n\neval \"return 'hello lua'\" 0\n\n127.0.0.1:6379&gt; eval 'return \"hello \" .. KEYS[1] .. ARGV[1]' 1 redis world\n\n\u6267\u884c\u8fd4\u56de\uff1a\"hello world\" <\/pre>\n<h3>Evalsha<\/h3>\n<p><strong>\u4e2a\u4eba\u7406\u89e3\uff0c\u521d\u6b21\u6267\u884c\u7528Eval\uff0c\u4e4b\u540e\u53ef\u4ee5\u4f7f\u7528sha1\u7801\u7528Evalsha\u6267\u884c<\/strong><\/p>\n<p>EvalSHA \u4e2d\u65b9\u5f0f\u7684\u662f\u62c6\u5206\u6210\u4e24\u4e2a\u6b65\u9aa4\uff0c\u9996\u5148\u8981\u5c06Lua\u811a\u672c\u52a0\u8f7d\u5230Redis\u670d\u52a1\u7aef\uff0c\u5f97\u5230\u8be5\u811a\u672c\u7684SHA1\u6821\u9a8c\u7801\u3002\u7136\u540e\u4f7f\u7528EvalSHA\u547d\u4ee4\u4f7f\u7528SHA1\u4f5c\u4e3a\u53c2\u6570\u53ef\u4ee5\u76f4\u63a5\u6267\u884c\u5bf9\u5e94Lua\u811a\u672c\u3002\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u53ef\u4ee5\u907f\u514d\u6bcf\u6b21\u53d1\u9001Lua\u811a\u672c\u7684\u5f00\u9500\uff0c\u800c\u811a\u672c\u4e5f\u4f1a\u5e38\u9a7b\u5728\u670d\u52a1\u7aef\uff0c\u811a\u672c\u529f\u80fd\u5f97\u5230\u4e86\u590d\u7528\u3002\u7f3a\u70b9\u662f\u8981\u600e\u4e48\u7ba1\u7406\u8fd9\u4e9b\u811a\u672c\u548c\u547d\u4ee4\u8fc7\u591a\u7684\u8bdd\u4f1a\u5360\u7528Redis\u7684\u5185\u5b58\u3002<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/20\/imaged86c469aa3743b58.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/20\/imaged86c469aa3743b58.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u6837\u4f8b<\/p>\n<pre class=\"code\">evalsha sha1\u503c key\u4e2a\u6570 key\u5217\u8868 \u53c2\u6570\u5217\u8868\n\neval \"return 'hello lua'\" 0\n\/\/ \u6267\u884c\u5b8ceval\u540e\uff0cLua\u73af\u5883\u5c31\u5b9a\u4e49\u4e86\u4e00\u4e2a\u51fd\u6570\u540d\u4e3a\uff1af_dfaujjgdgu388vdf83803(),\u90a3\u4e48\u5c31\u53ef\u4ee5\u6839\u636e\u5bf9\u5e94\u7684sha1\u503c\u6765\u8c03\u7528\u51fd\u6570\u4e86\u3002\nevlsha \"dfaujjgdgu388vdf83803\" 0 <\/pre>\n<h3>Redis\u5bf9\u4e8elua\u811a\u672c\u7684\u7ba1\u7406<\/h3>\n<p><strong>1.script flush<\/strong><\/p>\n<p><code>script flush<\/code>\u547d\u4ee4\u7528\u4e8e\u6e05\u9664\u670d\u52a1\u5668\u4e2d\u7684\u6240\u6709\u548cLua\u811a\u672c\u76f8\u5173\u7684\u4fe1\u606f\uff0c\u8fd9\u4e2a\u547d\u4ee4\u4f1a\u91ca\u653e\u5e76\u91cd\u5efa<code>lua_scripts<\/code>\u5b57\u5178\uff0c\u5173\u95ed\u73b0\u6709\u7684Lua\u73af\u5883\u5e76\u91cd\u5efa\u4e00\u4e2a\u65b0\u7684Lua\u73af\u5883\u3002<\/p>\n<p><strong>2.script exists<\/strong><\/p>\n<p><code>script exists<\/code>\u547d\u4ee4\u4f1a\u6839\u636e\u8f93\u5165\u7684SHA1\u6821\u9a8c\u548c\uff0c\u68c0\u67e5\u6821\u9a8c\u548c\u5bf9\u5e94\u7684\u811a\u672c\u662f\u5426\u5b58\u5728\u4e8e\u670d\u52a1\u5668\u4e2d\u3002\u8be5\u547d\u4ee4\u4e3b\u8981\u662f\u901a\u8fc7\u68c0\u67e5\u7ed9\u5b9a\u7684SHA1\u662f\u5426\u5b58\u5728\u4e8e<code>lua_scripts<\/code>\u5b57\u5178\u6765\u5b9e\u73b0\u7684\u3002<\/p>\n<pre class=\"code\">\u00a0127.0.0.1:6379&gt; script exists 5ea77eda7a16440abe244e6a88fd9df204ecd5aa\n1) (integer) 1<\/pre>\n<p><strong>3.script load<\/strong><\/p>\n<pre class=\"code\">127.0.0.1:6379&gt; script load \"return 'hello lua'\"\n\"5ea77eda7a16440abe244e6a88fd9df204ecd5aa\"\n\u00a0<\/pre>\n<p><strong>4.script kill<\/strong><\/p>\n<p>\u5982\u679cLua\u811a\u672c\u6bd4\u8f83\u8017\u65f6\uff0c\u751a\u81f3Lua\u811a\u672c\u5b58\u5728\u95ee\u9898\uff0c\u90a3\u4e48\u6b64\u65f6Lua\u811a\u672c\u7684\u6267\u884c\u4f1a\u963b\u585eRedis\uff0c\u76f4\u5230\u811a\u672c\u6267\u884c\u5b8c\u6bd5\u6216 \u8005\u5916\u90e8\u8fdb\u884c\u5e72\u9884\u5c06\u5176\u7ed3\u675f\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528<code>script kill<\/code>\u6765\u6740\u6389\u6b63\u5728\u6267\u884c\u7684 Lua \u811a\u672c\u3002<\/p>\n<pre class=\"code\">## \u5199\u4e00\u4e2a\u6b7b\u5faa\u73af\u7684lua\u811a\u672c\u5e76\u5728redis\u5ba2\u6237\u7aef\u6267\u884c\n127.0.0.1:6379&gt; eval 'while 1==1 do end' 0\n## \u91cd\u65b0\u8d77\u4e00\u4e2a\u5ba2\u6237\u7aef\u53bb\u6267\u884c\u547d\u4ee4\uff0c\u8fd4\u56de\u4e86\u62a5\u9519\u4fe1\u606f\uff0c\u6b64\u65f6Redis\u5df2\u7ecf\u963b\u585e\uff0c\u65e0\u6cd5\u5904\u7406\u6b63\u5e38\u7684\u8c03\u7528\uff0c\u8fd9\u65f6\u53ef\u4ee5\u9009\u62e9\u7ee7\u7eed\u7b49\u5f85\u3002\n## \u4f46\u66f4\u591a\u65f6\u5019\u9700\u8981\u5feb\u901f\u5c06\u811a\u672c\u6740\u6389\u3002\u4f7f\u7528shutdown save\u663e\u7136\u4e0d\u592a\u5408\u9002\uff0c\u6240\u4ee5\u9009\u62e9script kill\uff0c\u5f53script kill\u6267\u884c\u4e4b\u540e\uff0c\u5ba2\u6237\u7aef\u8c03\u7528\u4f1a\u6062\u590d\n127.0.0.1:6379&gt; get test\n(error) BUSY Redis is busy running a script. You can only call SCRIPT KILL or SHUTDOWN NOSAVE.\n## \u53e6\u8d77\u4e00\u4e2a\u5ba2\u6237\u7aef\uff0c\u505c\u6b62\u811a\u672c\u6267\u884c\n127.0.0.1:6379&gt; script kill\nOK\n127.0.0.1:6379&gt; get k1\n\"11\"\n\u00a0<\/pre>\n<p>\u6b64\u5916\uff0cRedis\u63d0\u4f9b\u4e86\u4e00\u4e2alua-time-limit\u53c2\u6570\uff0c\u7528\u4e8e\u914d\u7f6eLua\u811a\u672c\u6267\u884c\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u5f53 Lua \u811a\u672c\u65f6\u95f4\u8d85\u8fc7lua-time-limit\u540e\uff0c\u5411\u5176\u4ed6\u547d\u4ee4\u8c03\u7528\u53d1\u9001BUSY\u7684\u4fe1\u53f7\uff0c\u5e76\u4e0d\u4f1a\u505c\u6b62\u6389\u670d\u52a1\u7aef\u548c\u5ba2\u6237\u7aef\u7684\u811a\u672c\u6267\u884c\uff0c\u6240\u4ee5\u5f53\u67d0\u4e2aLua\u811a\u672c\u6267\u884c\u8fbe\u5230lua-time-limit\u503c\u4e4b\u540e\uff0c\u5176\u4ed6\u5ba2\u6237\u7aef\u5728\u6267\u884c\u6b63\u5e38\u7684\u547d\u4ee4\u65f6\uff0c\u5c06\u4f1a\u6536\u5230\u201cBusy Redis is busy running a script\u201d\u9519\u8bef\uff0c\u5e76\u4e14\u63d0\u793a\u4f7f\u7528script kill\u6216\u8005shutdown nosave\u547d\u4ee4\u6765\u6740\u6389\u8fd9\u4e2a busy \u7684\u811a\u672c\u3002<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0c\u5982\u679cRedis\u670d\u52a1\u7aef\u8bbe\u7f6e\u4e86lua-time-limit\u53c2\u6570\uff0c\u90a3\u4e48\u5728\u6bcf\u6b21\u6267\u884cLua\u811a\u672c\u4e4b\u524d\uff0c\u670d\u52a1\u5668\u90fd\u4f1a\u5728Lua\u73af\u5883\u91cc\u9762\u8bbe\u7f6e\u4e00\u4e2a\u8d85\u65f6\u7684\u5904\u7406\u94a9\u5b50(hook)\u3002\u8d85\u65f6\u5904\u7406\u94a9\u5b50\u518d\u811a\u672c\u8fd0\u884c\u671f\u95f4\uff0c\u4f1a\u5b9a\u671f\u68c0\u67e5\u811a\u672c\u5df2\u7ecf\u8fd0\u884c\u4e86\u591a\u957f\u65f6\u95f4\uff0c\u4e00\u65e6\u94a9\u5b50\u53d1\u73b0\u811a\u672c\u7684\u8fd0\u884c\u65f6\u95f4\u5df2\u7ecf\u8d85\u8fc7\u4e86lua-time-limit\u8bbe\u5b9a\u7684\u65f6\u957f\uff0c\u90a3\u4e48\u94a9\u5b50\u5c06\u5b9a\u671f\u5728\u811a\u672c\u8fd0\u884c\u7684\u95f4\u9699\u4e2d\uff0c\u67e5\u770b\u662f\u5426\u6709script kill\u6216\u8005shutdown nosave\u5230\u8fbe\u670d\u52a1\u5668\u3002\u5982\u679c\u8d85\u65f6\u8fd0\u884c\u7684\u811a\u672c\u672a\u6267\u884c\u8fc7\u4efb\u4f55\u7684\u5199\u5165\u64cd\u4f5c\uff0c\u90a3\u4e48\u5ba2\u6237\u7aef\u53ef\u4ee5\u901a\u8fc7script kill\u547d\u4ee4\u505c\u6b62\u811a\u672c\u7684\u8fd0\u884c\uff0c\u5e76\u5411\u6267\u884c\u8be5\u811a\u672c\u7684\u5ba2\u6237\u7aef\u53d1\u9001\u4e00\u4e2a\u9519\u8bef\u56de\u590d\u3002\u5904\u7406\u5b8cscript kill\u547d\u4ee4\u540e\u670d\u52a1\u5668\u53ef\u4ee5\u7ee7\u7eed\u8fd0\u884c\u3002<br \/>\u6b64\u5916\uff0c\u5982\u679c\u8d85\u65f6\u811a\u672c\u5df2\u7ecf\u6267\u884c\u8fc7\u5199\u5165\u64cd\u4f5c\uff0c\u90a3\u4e48\u5ba2\u6237\u7aef\u53ea\u80fd\u7528shutdown nosave\u547d\u4ee4\u6765\u505c\u6b62\u670d\u52a1\u5668\uff0c\u4ece\u800c\u9632\u6b62\u4e0d\u5408\u6cd5\u7684\u6570\u636e\u88ab\u5199\u5165\u3002<\/p>\n<h3>Lua\u5728Redis\u4e2d\u539f\u5b50\u6267\u884c\u6027\u7684\u539f\u7406<\/h3>\n<p>\u2003\u5728Redis\u4e2d\uff0cLua\u811a\u672c\u80fd\u591f\u4fdd\u8bc1\u539f\u5b50\u6027\u7684\u4e3b\u8981\u539f\u56e0\u8fd8\u662fRedis\u91c7\u7528\u4e86\u5355\u7ebf\u7a0b\u6267\u884c\u6a21\u578b\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5f53Redis\u6267\u884cLua\u811a\u672c\u65f6\uff0cRedis\u4f1a\u628aLua\u811a\u672c\u4f5c\u4e3a\u4e00\u4e2a\u6574\u4f53\u5e76\u628a\u5b83\u5f53\u4f5c\u4e00\u4e2a\u4efb\u52a1\u52a0\u5165\u5230\u4e00\u4e2a\u961f\u5217\u4e2d\uff0c\u7136\u540e\u5355\u7ebf\u7a0b\u6309\u7167\u961f\u5217\u7684\u987a\u5e8f\u4f9d\u6b21\u6267\u884c\u8fd9\u4e9b\u4efb\u52a1\uff0c\u5728\u6267\u884c\u8fc7\u7a0b\u4e2dLua\u811a\u672c\u662f\u4e0d\u4f1a\u88ab\u5176\u4ed6\u547d\u4ee4\u6216\u8bf7\u6c42\u6253\u65ad\uff0c\u56e0\u6b64\u53ef\u4ee5\u4fdd\u8bc1\u6bcf\u4e2a\u4efb\u52a1\u7684\u6267\u884c\u90fd\u662f\u539f\u5b50\u6027\u7684\u3002<\/p>\n<p><strong>\u4e2a\u4eba\u7406\u89e3\uff0c\u5c06lua\u811a\u672c\u5f53\u4f5c\u4e00\u4e2a\u7ebf\u7a0b\u6765\u5904\u7406<\/strong><\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>Redis\u5355\u7ebf\u7a0b\u7684\u7406\u89e3<\/h2>\n<h3>redis\u7684\u7ebf\u7a0b\u6a21\u578b<\/h3>\n<p>Redis\u5ba2\u6237\u7aef\u5bf9\u670d\u52a1\u7aef\u7684\u6bcf\u6b21\u8c03\u7528\u90fd\u7ecf\u5386\u4e86\u53d1\u9001\u547d\u4ee4\uff0c\u6267\u884c\u547d\u4ee4\uff0c\u8fd4\u56de\u7ed3\u679c\u4e09\u4e2a\u8fc7\u7a0b\u3002<strong>\u5176\u4e2d\u6267\u884c\u547d\u4ee4\u9636\u6bb5\uff0c\u7531\u4e8eRedis\u662f\u5355\u7ebf\u7a0b\u6765\u5904\u7406\u547d\u4ee4\u7684<\/strong>\uff0c\u6240\u4ee5\u6bcf\u4e00\u6761\u5230\u8fbe\u670d\u52a1\u7aef\u7684\u547d\u4ee4\u4e0d\u4f1a\u7acb\u523b\u6267\u884c\uff0c\u6240\u6709\u7684\u547d\u4ee4\u90fd\u4f1a\u8fdb\u5165\u4e00\u4e2a\u961f\u5217\u4e2d\uff0c\u7136\u540e\u9010\u4e2a\u88ab\u6267\u884c\u3002\u5e76\u4e14\u591a\u4e2a\u5ba2\u6237\u7aef\u53d1\u9001\u7684\u547d\u4ee4\u7684\u6267\u884c\u987a\u5e8f\u662f\u4e0d\u786e\u5b9a\u7684\u3002\u4f46\u662f\u53ef\u4ee5\u786e\u5b9a\u7684\u662f\u4e0d\u4f1a\u6709\u4e24\u6761\u547d\u4ee4\u88ab\u540c\u65f6\u6267\u884c\uff0c\u4e0d\u4f1a\u4ea7\u751f\u5e76\u53d1\u95ee\u9898\uff0c\u8fd9\u5c31\u662fRedis\u7684\u5355\u7ebf\u7a0b\u57fa\u672c\u6a21\u578b\u3002<\/p>\n<p>\u2003Redis \u5185\u90e8\u4f7f\u7528\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\uff08file event handler\uff09\uff0c<strong>\u8fd9\u4e2a\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u662f\u5355\u7ebf\u7a0b\u7684\uff0c\u6240\u4ee5 Redis \u624d\u53eb\u505a\u5355\u7ebf\u7a0b\u7684\u6a21\u578b<\/strong>\u3002\u4e5f\u5c31\u662f\u8bf4Redis \u7684\u5355\u7ebf\u7a0b\u6307\u7684\u662f\u6267\u884c Redis \u547d\u4ee4\u7684\u6838\u5fc3\u6a21\u5757\u662f\u5355\u7ebf\u7a0b\u7684\uff0c\u800c\u4e0d\u662f\u6574\u4e2a Redis \u5b9e\u4f8b\u5c31\u4e00\u4e2a\u7ebf\u7a0b\uff0cRedis \u5176\u4ed6\u6a21\u5757\u8fd8\u6709\u5404\u81ea\u6a21\u5757\u7684\u7ebf\u7a0b\u7684\uff0c<strong>Redis 4.0 \u5f00\u59cb\u5c31\u6709\u591a\u7ebf\u7a0b\u7684\u6982\u5ff5\u4e86<\/strong>\uff0c\u6bd4\u5982 Redis \u901a\u8fc7\u591a\u7ebf\u7a0b\u65b9\u5f0f\u5728\u540e\u53f0\u5220\u9664\u5bf9\u8c61\u3001\u4ee5\u53ca\u901a\u8fc7 Redis \u6a21\u5757\u5b9e\u73b0\u7684\u963b\u585e\u547d\u4ee4\u7b49\u3002<strong>Redis \u91c7\u7528 IO \u591a\u8def\u590d\u7528\u673a\u5236\u540c\u65f6\u76d1\u542c\u591a\u4e2a socket\uff0c\u6839\u636e socket \u4e0a\u7684\u4e8b\u4ef6\u6765\u9009\u62e9\u5bf9\u5e94\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u8fdb\u884c\u5904\u7406\u3002<\/strong><\/p>\n<p>\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u7684\u7ed3\u6784\u5305\u542b 4 \u4e2a\u90e8\u5206\uff1a \u591a\u4e2a socket\u3001IO \u591a\u8def\u590d\u7528\u7a0b\u5e8f\u3001\u6587\u4ef6\u4e8b\u4ef6\u5206\u6d3e\u5668\u3001\u4e8b\u4ef6\u5904\u7406\u5668\uff08\u8fde\u63a5\u5e94\u7b54\u5904\u7406\u5668\u3001\u547d\u4ee4\u8bf7\u6c42\u5904\u7406\u5668\u3001\u547d\u4ee4\u56de\u590d\u5904\u7406\u5668\uff09<br \/>\u2003\u2003\u591a\u4e2a socket \u53ef\u80fd\u4f1a\u5e76\u53d1\u4ea7\u751f\u4e0d\u540c\u7684\u64cd\u4f5c\uff0c\u6bcf\u4e2a\u64cd\u4f5c\u5bf9\u5e94\u4e0d\u540c\u7684\u6587\u4ef6\u4e8b\u4ef6\uff0c\u4f46\u662f IO \u591a\u8def\u590d\u7528\u7a0b\u5e8f\u4f1a\u76d1\u542c\u591a\u4e2a socket\uff0c\u4f1a\u5c06 socket \u4ea7\u751f\u7684\u4e8b\u4ef6\u653e\u5165\u961f\u5217\u4e2d\u6392\u961f\uff0c\u4e8b\u4ef6\u5206\u6d3e\u5668\u6bcf\u6b21\u4ece\u961f\u5217\u4e2d\u53d6\u51fa\u4e00\u4e2a\u4e8b\u4ef6\uff0c\u628a\u8be5\u4e8b\u4ef6\u4ea4\u7ed9\u5bf9\u5e94\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u8fdb\u884c\u5904\u7406\u3002<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/20\/image4a71463e95d8045f.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/20\/image4a71463e95d8045f.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u5ba2\u6237\u7aef socket01 \u5411 Redis \u7684 server socket \u8bf7\u6c42\u5efa\u7acb\u8fde\u63a5\uff0c\u6b64\u65f6 server socket \u4f1a\u4ea7\u751f\u4e00\u4e2a AE_READABLE \u4e8b\u4ef6\uff0cIO \u591a\u8def\u590d\u7528\u7a0b\u5e8f\u76d1\u542c\u5230 server socket \u4ea7\u751f\u7684\u4e8b\u4ef6\u540e\uff0c\u5c06\u8be5\u4e8b\u4ef6\u538b\u5165\u961f\u5217\u4e2d\u3002\u6587\u4ef6\u4e8b\u4ef6\u5206\u6d3e\u5668\u4ece\u961f\u5217\u4e2d\u83b7\u53d6\u8be5\u4e8b\u4ef6\uff0c\u4ea4\u7ed9<strong>\u8fde\u63a5\u5e94\u7b54\u5904\u7406\u5668<\/strong>\u3002\u8fde\u63a5\u5e94\u7b54\u5904\u7406\u5668\u4f1a<strong>\u521b\u5efa\u4e00\u4e2a\u80fd\u4e0e\u5ba2\u6237\u7aef\u901a\u4fe1\u7684 socket01<\/strong>\uff0c\u5e76\u5c06\u8be5 socket01 \u7684 AE_READABLE \u4e8b\u4ef6\u4e0e\u547d\u4ee4\u8bf7\u6c42\u5904\u7406\u5668\u5173\u8054\u3002<\/p>\n<p>\u2003\u2003\u5047\u8bbe\u6b64\u65f6\u5ba2\u6237\u7aef\u53d1\u9001\u4e86\u4e00\u4e2a set key value \u8bf7\u6c42\uff0c\u6b64\u65f6 Redis \u4e2d\u7684<strong> socket01 \u4f1a\u4ea7\u751f AE_READABLE \u4e8b\u4ef6\uff0c<\/strong>IO \u591a\u8def\u590d\u7528\u7a0b\u5e8f\u5c06\u4e8b\u4ef6\u538b\u5165\u961f\u5217\uff0c\u6b64\u65f6\u4e8b\u4ef6\u5206\u6d3e\u5668\u4ece\u961f\u5217\u4e2d\u83b7\u53d6\u5230\u8be5\u4e8b\u4ef6\uff0c\u7531\u4e8e\u524d\u9762 socket01 \u7684 AE_READABLE \u4e8b\u4ef6\u5df2\u7ecf\u4e0e\u547d\u4ee4\u8bf7\u6c42\u5904\u7406\u5668\u5173\u8054\uff0c\u56e0\u6b64<strong>\u4e8b\u4ef6\u5206\u6d3e\u5668\u5c06\u4e8b\u4ef6\u4ea4\u7ed9\u547d\u4ee4\u8bf7\u6c42\u5904\u7406\u5668\u6765\u5904\u7406<\/strong>\u3002\u547d\u4ee4\u8bf7\u6c42\u5904\u7406\u5668\u8bfb\u53d6 socket01 \u7684 key value \u5e76\u5728\u81ea\u5df1\u5185\u5b58\u4e2d\u5b8c\u6210 key value \u7684\u8bbe\u7f6e\u3002\u64cd\u4f5c\u5b8c\u6210\u540e\uff0c\u5b83\u4f1a\u5c06 socket01 \u7684 AE_WRITABLE \u4e8b\u4ef6\u4e0e\u547d\u4ee4\u56de\u590d\u5904\u7406\u5668\u5173\u8054\u3002<\/p>\n<p>\u2003\u2003\u5982\u679c\u6b64\u65f6\u5ba2\u6237\u7aef\u51c6\u5907\u597d\u63a5\u6536\u8fd4\u56de\u7ed3\u679c\u4e86\uff0c\u90a3\u4e48 Redis \u4e2d\u7684 socket01 \u4f1a\u4ea7\u751f\u4e00\u4e2a AE_WRITABLE \u4e8b\u4ef6\uff0c\u540c\u6837\u538b\u5165\u961f\u5217\u4e2d\uff0c<strong>\u4e8b\u4ef6\u5206\u6d3e\u5668\u627e\u5230\u76f8\u5173\u8054\u7684\u547d\u4ee4\u56de\u590d\u5904\u7406\u5668<\/strong>\uff0c\u7531\u547d\u4ee4\u56de\u590d\u5904\u7406\u5668\u5bf9 socket01 \u8f93\u5165\u672c\u6b21\u64cd\u4f5c\u7684\u4e00\u4e2a\u7ed3\u679c\uff0c\u6bd4\u5982 ok\uff0c\u4e4b\u540e\u89e3\u9664 socket01 \u7684 AE_WRITABLE \u4e8b\u4ef6\u4e0e\u547d\u4ee4\u56de\u590d\u5904\u7406\u5668\u7684\u5173\u8054\u3002<\/p>\n<h3>\u4e3a\u4ec0\u4e48redis\u662f\u5355\u7ebf\u7a0b\uff0c\u6548\u7387\u8fd8\u80fd\u8fd9\u4e48\u9ad8<\/h3>\n<ul>\n<li>\u7eaf\u5185\u5b58\u8bbf\u95ee\uff1a\u6570\u636e\u5b58\u653e\u5728\u5185\u5b58\u4e2d\uff0c\u5185\u5b58\u7684\u54cd\u5e94\u65f6\u95f4\u5927\u7ea6\u662f100\u7eb3\u79d2\uff0c\u8fd9\u662fRedis\u6bcf\u79d2\u4e07\u4ebf\u7ea7\u522b\u8bbf\u95ee\u7684\u91cd\u8981\u57fa\u7840\u3002<\/li>\n<li>\u975e\u963b\u585eI\/O\uff1aRedis\u91c7\u7528epoll\u505a\u4e3aI\/O\u591a\u8def\u590d\u7528\u6280\u672f\u7684\u5b9e\u73b0\uff0c\u518d\u52a0\u4e0aRedis\u81ea\u8eab\u7684\u4e8b\u4ef6\u5904\u7406\u6a21\u578b\u5c06epoll\u4e2d\u7684\u8fde\u63a5\uff0c\u8bfb\u5199\uff0c\u5173\u95ed\u90fd\u8f6c\u6362\u4e3a\u4e86\u4e8b\u4ef6\uff0c\u4e0d\u5728I\/O\u4e0a\u6d6a\u8d39\u8fc7\u591a\u7684\u65f6\u95f4\u3002<\/li>\n<li>\u5355\u7ebf\u7a0b\u907f\u514d\u4e86\u7ebf\u7a0b\u5207\u6362\u548c\u7ade\u6001\u4ea7\u751f\u7684\u6d88\u8017\u3002<\/li>\n<\/ul>\n<h4>redis\u5355\u7ebf\u7a0b\u7684\u597d\u5904<\/h4>\n<p>\u5e76\u53d1\u548c\u5e76\u884c\u901a\u5e38\u88ab\u8ba4\u4e3a\u662f\u4e0d\u540c\u7684\u6982\u5ff5\uff0c\u6709\u4ec0\u4e48\u533a\u522b\uff1f<br \/>1\u3001\u5e76\u53d1\u6027I\/O\u6d41\uff0c\u610f\u5473\u7740\u80fd\u591f\u8ba9\u4e00\u4e2a\u8ba1\u7b97\u5355\u5143\u6765\u5904\u7406\u6765\u81ea\u591a\u4e2a\u5ba2\u6237\u7aef\u7684\u6d41\u8bf7\u6c42\u3002<br \/>2\u3001\u5e76\u884c\u6027\uff0c\u610f\u5473\u7740\u670d\u52a1\u5668\u80fd\u591f\u540c\u65f6\u6267\u884c\u51e0\u4e2a\u4e8b\u60c5\uff08\u5177\u6709\u591a\u4e2a\u8ba1\u7b97\u5355\u5143\uff09\uff0c\u8fd9\u662f\u4e0d\u540c\u7684\u3002<br \/>\u4f8b\u5982\uff0c\u9152\u5427\u80fd\u591f\u670d\u52a1\u51e0\u4e2a\u987e\u5ba2\uff0c\u540c\u65f6\u4ed6\u53ea\u80fd\u4e00\u6b21\u51c6\u5907\u4e00\u4e2a\u996e\u6599\u3002\u6240\u4ee5\u4ed6\u53ef\u4ee5\u63d0\u4f9b\u6ca1\u6709\u5e76\u884c\u6027\u7684\u5e76\u53d1\u670d\u52a1\u3002<br \/>Redis\u867d\u7136\u662f\u5355\u7ebf\u7a0b\u7a0b\u5e8f\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528I \/ O\u591a\u8def\u590d\u7528\u540c\u4e00\u4e2a\u7ebf\u7a0b\u548c\u4e8b\u4ef6\u5faa\u73af\u5728I \/ O\u7ea7\u522b\u4e0a\u63d0\u4f9b\u5e76\u53d1\u6027\u3002\u50cfRedis\u8fd9\u6837\u7684\u9ad8\u6548\u5b58\u50a8\u5f15\u64ce\u7684\u74f6\u9888\u901a\u5e38\u662f\u7f51\u7edc\uff0c\u5728CPU\u4e4b\u4e0a\u3002\u56e0\u6b64\uff0c<strong>Redis\u539f\u5b50\u6027\uff08\u9694\u79bb\u4e8b\u4ef6\u5faa\u73af\uff09\u5728\u6ca1\u6709\u989d\u5916\u6210\u672c\u7684\u60c5\u51b5\u4e0b\u63d0\u4f9b\u5e76\u53d1\u6027\uff08\u4e0d\u9700\u8981\u8fdb\u7a0b\u3001\u7ebf\u7a0b\u540c\u6b65\uff09,\u65e0\u9700\u652f\u4ed8\u540c\u6b65\u5f00\u9500\u3002\u5e76\u884c\u6027\u6709\u4e00\u4e2a\u4ee3\u4ef7\uff1a\u73b0\u5728\u786c\u4ef6\u8bbe\u5907\u90fd\u662f\u591a\u6838\uff0c\u5f53\u7136\u591a\u6838\u901f\u5ea6\u80af\u5b9a\u6bd4\u5355\u6838\u6548\u7387\u9ad8\uff0c\u4f46\u8fdb\u7a0b\u7ebf\u7a0b\u4e4b\u95f4\u7684\u540c\u6b65\u662f\u975e\u5e38\u6602\u8d35\u7684\u3002<\/strong>\u597d\u6bd4\uff0c\u4eba\u5bb6redis\u53ea\u8981\u4e00\u53f0\u670d\u52a1\u5668\u53ef\u4ee5\u641e\u5b9a\u7684\u4e8b\u60c5\uff0c\u4f60\u5e72\u561b\u4e00\u5b9a\u8981\u8ba9\u6211\u4f7f\u7528\u591a\u53f0\u670d\u52a1\u5668\u3002\u5b83\u8f7b\u5de7\uff0c\u53ef\u4f5c\u4e3a\u6784\u5efa\u9ad8\u6548\u53ef\u6269\u5c55\u7684\u670d\u52a1\u5668\uff0c\u4f55\u5fc5\u7ea0\u7ed3\u4e00\u5b9a\u8981\u88c5\u6ce2\u97f3747\u7684\u53d1\u52a8\u673a\uff08\u5bf9\u5e94\u7684\u8bbe\u8ba1\u6bd4\u8f83\u590d\u6742\uff09\uff0credis\u8bbe\u8ba1\u6709\u5b83\u81ea\u5df1\u67b6\u6784\u7684\u597d\u5904\uff01\u5b98\u7f51\u4e5f\u8bf4\u4e86\uff0c\u8981\u53d1\u6325\u591a\u6838CPU\u6027\u80fd\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728\u5355\u673a\u5f00\u591a\u4e2aRedis core\u5b9e\u4f8b\u6765\u5b8c\u5584\uff0c\u4e00\u6837\u5b9e\u73b0\u5206\u5e03\u5f0f<\/p>\n<h3>Redis6\u4e4b\u540e\u5f15\u5165\u591a\u7ebf\u7a0b<\/h3>\n<h4>\u4f20\u7edf\u963b\u585eI\/O\u6a21\u578b<\/h4>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/20\/imagebb9c30083e87438a.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/20\/imagebb9c30083e87438a.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h4>\u4f2a\u5f02\u6b65I\/O\u6a21\u578b<\/h4>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/20\/image9ced5668c36d6048.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/20\/image9ced5668c36d6048.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h4>Reactor\u8bbe\u8ba1\u6a21\u5f0f<\/h4>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/20\/image4b1b085da85d6d59.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/20\/image4b1b085da85d6d59.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h3>\u5355\u7ebf\u7a0b\u65f6\u4ee3<\/h3>\n<p>Redis \u662f\u57fa\u4e8e Reactor \u5355\u7ebf\u7a0b\u6a21\u5f0f\u6765\u5b9e\u73b0\u7684\u3002<br \/>\u2003\u2003IO\u591a\u8def\u590d\u7528\u7a0b\u5e8f\u63a5\u6536\u5230\u7528\u6237\u7684\u8bf7\u6c42\u540e\uff0c\u5168\u90e8\u63a8\u9001\u5230\u4e00\u4e2a\u961f\u5217\u91cc\uff0c\u4ea4\u7ed9\u6587\u4ef6\u5206\u6d3e\u5668\u3002\u5bf9\u4e8e\u540e\u7eed\u7684\u64cd\u4f5c\uff0c\u548c\u5728 reactor \u5355\u7ebf\u7a0b\u5b9e\u73b0\u65b9\u6848\u91cc\u770b\u5230\u7684\u4e00\u6837\uff0c\u6574\u4e2a\u8fc7\u7a0b\u90fd\u5728\u4e00\u4e2a\u7ebf\u7a0b\u91cc\u5b8c\u6210\uff0c\u56e0\u6b64 Redis \u88ab\u79f0\u4e3a\u662f\u5355\u7ebf\u7a0b\u7684\u64cd\u4f5c\u3002<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/20\/image4b897d84a1ab1c3d.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/20\/image4b897d84a1ab1c3d.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h3>\u591a\u7ebf\u7a0b\u6a21\u578b<\/h3>\n<p><strong>\u5355\u7ebf\u7a0b\u5728\u7f51\u7edcIO\u64cd\u4f5c\u4e0a\u6709\u4e00\u5b9a\u7684\u74f6\u9888<\/strong><\/p>\n<p>\u5728 Redis \u4e2d\uff0c\u5355\u7ebf\u7a0b\u7684\u6027\u80fd\u74f6\u9888\u4e3b\u8981\u5728\u7f51\u7edcIO\u64cd\u4f5c\u4e0a\u3002\u4e5f\u5c31\u662f\u5728\u8bfb\u5199\u7f51\u7edc read\/write \u7cfb\u7edf\u8c03\u7528\u6267\u884c\u671f\u95f4\u4f1a\u5360\u7528\u5927\u90e8\u5206 CPU \u65f6\u95f4\u3002\u5982\u679c\u8981\u5bf9\u4e00\u4e9b\u5927\u7684\u952e\u503c\u5bf9\u8fdb\u884c\u5220\u9664\u64cd\u4f5c\u7684\u8bdd\uff0c\u5728\u77ed\u65f6\u95f4\u5185\u662f\u5220\u4e0d\u5b8c\u7684\uff0c\u90a3\u4e48\u5bf9\u4e8e\u5355\u7ebf\u7a0b\u6765\u8bf4\u5c31\u4f1a\u963b\u585e\u540e\u8fb9\u7684\u64cd\u4f5c\u3002<br \/>\u2003\u2003\u56de\u60f3\u4e0b\u4e0a\u8fb9\u8bb2\u5f97 Reactor \u6a21\u5f0f\u4e2d\u5355\u7ebf\u7a0b\u7684\u5904\u7406\u65b9\u5f0f\u3002\u9488\u5bf9\u975e\u8fde\u63a5\u4e8b\u4ef6\uff0cReactor \u4f1a\u8c03\u7528\u5bf9\u5e94\u7684 handler \u5b8c\u6210 read-&gt;\u4e1a\u52a1\u5904\u7406-&gt;write\u5904\u7406\u6d41\u7a0b\uff0c\u4e5f\u5c31\u662f\u8bf4\u8fd9\u4e00\u6b65\u4f1a\u9020\u6210\u6027\u80fd\u4e0a\u7684\u74f6\u9888\u3002<\/p>\n<p><strong>Redis \u5728\u8bbe\u8ba1\u4e0a\u91c7\u7528\u5c06\u7f51\u7edc\u6570\u636e\u8bfb\u5199\u548c\u534f\u8bae\u89e3\u6790\u901a\u8fc7\u591a\u7ebf\u7a0b\u7684\u65b9\u5f0f\u6765\u5904\u7406\uff0c\u5bf9\u4e8e\u547d\u4ee4\u6267\u884c\u6765\u8bf4\uff0c\u4ecd\u7136\u4f7f\u7528\u5355\u7ebf\u7a0b\u64cd\u4f5c\u3002<\/strong><\/p>\n<p><strong>\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\uff08file event handler\uff09<\/strong><\/p>\n<p>Redis \u57fa\u4e8e Reactor \u6a21\u5f0f\u5f00\u53d1\u4e86\u81ea\u5df1\u7684\u7f51\u7edc\u4e8b\u4ef6\u5904\u7406\u5668\uff1a \u8fd9\u4e2a\u5904\u7406\u5668\u88ab\u79f0\u4e3a\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\uff08file event handler\uff09<br \/>\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u4f7f\u7528 I\/O \u591a\u8def\u590d\u7528\uff08multiplexing\uff09\u7a0b\u5e8f\u6765\u540c\u65f6\u76d1\u542c\u591a\u4e2a\u5957\u63a5\u5b57\uff0c \u5e76\u6839\u636e\u5957\u63a5\u5b57\u76ee\u524d\u6267\u884c\u7684\u4efb\u52a1\u6765\u4e3a\u5957\u63a5\u5b57\u5173\u8054\u4e0d\u540c\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u3002<br \/>\u5f53\u88ab\u76d1\u542c\u7684\u5957\u63a5\u5b57\u51c6\u5907\u597d\u6267\u884c\u8fde\u63a5\u5e94\u7b54\uff08accept\uff09\u3001\u8bfb\u53d6\uff08read\uff09\u3001\u5199\u5165\uff08write\uff09\u3001\u5173\u95ed\uff08close\uff09\u7b49\u64cd\u4f5c\u65f6\uff0c \u4e0e\u64cd\u4f5c\u76f8\u5bf9\u5e94\u7684\u6587\u4ef6\u4e8b\u4ef6\u5c31\u4f1a\u4ea7\u751f\uff0c \u8fd9\u65f6\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u5c31\u4f1a\u8c03\u7528\u5957\u63a5\u5b57\u4e4b\u524d\u5173\u8054\u597d\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u6765\u5904\u7406\u8fd9\u4e9b\u4e8b\u4ef6\u3002<br \/>\u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u4ee5\u5355\u7ebf\u7a0b\u65b9\u5f0f\u8fd0\u884c\uff0c \u4f46\u901a\u8fc7\u4f7f\u7528 I\/O \u591a\u8def\u590d\u7528\u7a0b\u5e8f\u6765\u76d1\u542c\u591a\u4e2a\u5957\u63a5\u5b57\uff0c \u6587\u4ef6\u4e8b\u4ef6\u5904\u7406\u5668\u65e2\u5b9e\u73b0\u4e86\u9ad8\u6027\u80fd\u7684\u7f51\u7edc\u901a\u4fe1\u6a21\u578b\uff0c \u53c8\u53ef\u4ee5\u5f88\u597d\u5730\u4e0e Redis \u670d\u52a1\u5668\u4e2d\u5176\u4ed6\u540c\u6837\u4ee5\u5355\u7ebf\u7a0b\u65b9\u5f0f\u8fd0\u884c\u7684\u6a21\u5757\u8fdb\u884c\u5bf9\u63a5\uff0c \u8fd9\u4fdd\u6301\u4e86 Redis \u5185\u90e8\u5355\u7ebf\u7a0b\u8bbe\u8ba1\u7684\u7b80\u5355\u6027\u3002<\/p>\n<h3>\u603b\u7ed3<\/h3>\n<p><strong>Reactor\u6a21\u5f0f<\/strong><\/p>\n<p>\u4f20\u7edf\u963b\u585eIO\u6a21\u578b\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u7aef\u7ebf\u7a0b1:1\u5206\u914d\uff0c\u4e0d\u5229\u4e8e\u8fdb\u884c\u6269\u5c55\u3002<br \/>\u4f2a\u5f02\u6b65IO\u6a21\u578b\u91c7\u7528\u7ebf\u7a0b\u6c60\u65b9\u5f0f\uff0c\u4f46\u662f\u5e95\u5c42\u4ecd\u7136\u4f7f\u7528\u540c\u6b65\u963b\u585e\u65b9\u5f0f\uff0c\u9650\u5236\u4e86\u6700\u5927\u8fde\u63a5\u6570\u3002<br \/>Reactor \u901a\u8fc7 I\/O\u590d\u7528\u7a0b\u5e8f\u76d1\u63a7\u5ba2\u6237\u7aef\u8bf7\u6c42\u4e8b\u4ef6\uff0c\u901a\u8fc7\u4efb\u52a1\u5206\u6d3e\u5668\u8fdb\u884c\u5206\u53d1\u3002<br \/><strong>\u5355\u7ebf\u7a0b\u65f6\u4ee3<\/strong><br \/>\u57fa\u4e8e Reactor \u5355\u7ebf\u7a0b\u6a21\u5f0f\u5b9e\u73b0\uff0c\u901a\u8fc7IO\u591a\u8def\u590d\u7528\u7a0b\u5e8f\u63a5\u6536\u5230\u7528\u6237\u7684\u8bf7\u6c42\u540e\uff0c\u5168\u90e8\u63a8\u9001\u5230\u4e00\u4e2a\u961f\u5217\u91cc\uff0c\u4ea4\u7ed9\u6587\u4ef6\u5206\u6d3e\u5668\u8fdb\u884c\u5904\u7406\u3002<br \/><strong>\u591a\u7ebf\u7a0b\u65f6\u4ee3<\/strong><\/p>\n<p>\u5355\u7ebf\u7a0b\u6027\u80fd\u74f6\u9888\u4e3b\u8981\u5728\u7f51\u7edcIO\u4e0a\u3002<br \/>Redis \u7684\u591a\u7ebf\u7a0b\u90e8\u5206\u53ea\u662f\u7528\u6765\u5904\u7406\u7f51\u7edc\u6570\u636e\u7684\u8bfb\u5199\u548c\u534f\u8bae\u89e3\u6790\uff0c\u5bf9\u4e8e\u547d\u4ee4\u6267\u884c\u6765\u8bf4\uff0c\u4ecd\u7136\u4f7f\u7528\u5355\u7ebf\u7a0b\u64cd\u4f5c\u3002\u4e4b\u6240\u4ee5\u8fd9\u4e48\u8bbe\u8ba1\u662f\u4e0d\u60f3 Redis \u56e0\u4e3a\u591a\u7ebf\u7a0b\u800c\u53d8\u5f97\u590d\u6742\uff0c\u9700\u8981\u53bb\u63a7\u5236 key\u3001lua\u3001\u4e8b\u52a1\uff0cLPUSH\/LPOP \u7b49\u7b49\u7684\u5e76\u53d1\u95ee\u9898\u3002<\/p>\n<h3>\u00a0<\/h3>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>Mysql\u7684\u7d22\u5f15\u5931\u6548<\/h2>\n<h3>\u539f\u56e0<\/h3>\n<p>\u56e0\u4e3asql\u4f18\u5316\u5668\u7684\u5b58\u5728\uff0c\u4f18\u5316\u5668\u662f\u57fa\u4e8e\u5f00\u9500\u8fdb\u884c\u4f18\u5316\uff0c\u4e0d\u8003\u8651\u8bed\u4e49\uff0c\u4e0d\u8003\u8651\u89c4\u5219\uff0c\u6309\u5f00\u9500\u6700\u5c0f\u7684\u6765\uff0c\u6240\u4ee5\u5f53\u4f7f\u7528\u7d22\u5f15\u7684\u5f00\u9500\u5927\u4e8e\u5168\u8868\u67e5\u8be2\u65f6\uff0c\u6570\u636e\u5e93\u5c31\u4e0d\u4f1a\u4f7f\u7528\u7d22\u5f15\u67e5\u8be2\u4e86<\/p>\n<h3>\u7d22\u5f15\u5931\u6548\u60c5\u51b5<\/h3>\n<ul>\n<li>\u6ca1\u6709\u6ee1\u8db3\u6700\u4f73\u5de6\u524d\u7f00\u6cd5\u5219\uff0c\u4f8b\u5982\u7d22\u5f15(a,b,c)\uff0c\u53ea\u6709\u67e5\u8be2(a),(a,b),(a,b,c)\u4f1a\u8d70\u7d22\u5f15\uff0c\u800c(b),(b,c),(c)\u90fd\u4e0d\u4f1a\u8d70\u7d22\u5f15\u3002<\/li>\n<li>\u6ca1\u6709\u5efa\u7acb\u5168\u503c\u5339\u914d\uff0c\u5bfc\u81f4\u7d22\u5f15\u6548\u7387\u4f4e<\/li>\n<li>\u4f60\u7684\u4e3b\u952e\u63d2\u5165\u987a\u5e8f\u4e0d\u662f\u81ea\u589e\u7684<\/li>\n<li>\u5728\u5224\u65ad\u8bed\u53e5\u4e2d\u4f7f\u7528\u4e86\u8ba1\u7b97\u6216\u8005\u51fd\u6570<\/li>\n<li>\u5728\u5224\u65ad\u8bed\u53e5\u4e2d\u4f7f\u7528\u4e86\u7c7b\u578b\u8f6c\u6362<\/li>\n<li>\u8303\u56f4\u6761\u4ef6\u53f3\u8fb9\u7684\u5217\u7d22\u5f15\u5931\u6548\uff0c\u6240\u4ee5\u8303\u56f4\u5339\u914d\u8981\u5c3d\u91cf\u653e\u5230\u6700\u540e\uff08\u6a21\u7cca\u67e5\u8be2like\u4e0d\u662f\u8303\u56f4\u7d22\u5f15\uff09<\/li>\n<li>\u6ca1\u6709\u8986\u76d6\u7d22\u5f15\uff0c\u201c\uff01=\u201d\u5bfc\u81f4\u7d22\u5f15\u5931\u6548<\/li>\n<li>\u6ca1\u8986\u76d6\u7d22\u5f15\uff0cis not null\uff0cnot like\u5bfc\u81f4\u7d22\u5f15\u5931\u6548<\/li>\n<li>\u6ca1\u8986\u76d6\u7d22\u5f15\uff0c\u5de6\u6a21\u7cca\u7d22\u5f15\u5bfc\u81f4\u7d22\u5f15\u5931\u6548<\/li>\n<li>OR\u524d\u540e\u5b58\u5728\u975e\u7d22\u5f15\u5217\uff0c\u5bfc\u81f4\u7d22\u5f15\u5931\u6548<\/li>\n<li>\u4e0d\u540c\u5b57\u7b26\u96c6\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\uff0c\u5efa\u8baeutf8mb4<\/li>\n<\/ul>\n<h3>isnull\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\uff0cis not null\u4e0d\u80fd\u4f7f\u7528\u7d22\u5f15<\/h3>\n<p>\u5728\u8fdb\u884c\u7d22\u5f15\u626b\u63cf\u65f6\uff0cMySQL \u4f1a\u4f18\u5148\u5229\u7528\u7d22\u5f15\u4e2d\u5df2\u7ecf\u5b58\u5728\u7684\u503c\u8fdb\u884c\u67e5\u8be2\uff0c\u5728\u67e5\u8be2\u65f6\u76f4\u63a5\u8df3\u8fc7\u4e3a NULL \u7684\u90a3\u4e9b\u884c\u3002\u4f46\u662f\uff0c\u5982\u679c\u4f7f\u7528\u4e86 IS NOT NULL \u6761\u4ef6\uff0c\u90a3\u4e48 MySQL \u65e0\u6cd5\u5728\u7d22\u5f15\u4e2d\u627e\u5230 NULL \u503c\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0cMySQL \u65e0\u6cd5\u50cf\u524d\u9762\u90a3\u6837\u8df3\u8fc7\u90a3\u4e9b\u4e3a NULL \u7684\u884c\uff0c\u53ea\u80fd\u626b\u63cf\u6574\u5f20\u8868\u6765\u627e\u5230\u7b26\u5408\u6761\u4ef6\u7684\u884c\uff0c\u56e0\u6b64\u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15\u3002<\/p>\n<\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>Mysql\u9690\u5f0f\u8f6c\u6362<\/h2>\n<p><span class=\"words-blog hl-git-1\" data-tit=\"MySQL\" data-pretit=\"mysql\">MySQL<\/span>\u4e2d\u7684\u9690\u5f0f\u8f6c\u6362\uff08Implicit Conversion\uff09\u6307\u7684\u662f\u5728SQL\u8bed\u53e5\u7684\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff08DBMS\uff09\u81ea\u52a8\u8fdb\u884c\u7684\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u3002\u8fd9\u79cd\u8f6c\u6362\u901a\u5e38\u53d1\u751f\u5728\u6570\u636e\u7c7b\u578b\u4e0d\u5339\u914d\u4f46\u9700\u8981\u8fdb\u884c\u6bd4\u8f83\u3001\u8ba1\u7b97\u6216\u8d4b\u503c\u7b49\u64cd\u4f5c\u65f6\u3002<\/p>\n<h3>\u5e38\u89c1\u7684\u573a\u666f<\/h3>\n<ul>\n<li>\u5b57\u7b26\u4e32\u4e0e\u6570\u5b57<\/li>\n<li>\u65e5\u671f\u7c7b\u578b\u548c\u5176\u4ed6\u7c7b\u578b<\/li>\n<li>NULL\u503c\u5904\u7406<\/li>\n<li>\u6574\u6570\u548c\u5c0f\u6570<\/li>\n<li>\u4e8c\u8fdb\u5236\u548c\u5b57\u7b26\u7c7b\u578b<\/li>\n<\/ul>\n<h3>\u67e5\u770b\u9690\u5f0f\u8f6c\u6362<\/h3>\n<p>\u4f7f\u7528explain\u8bed\u53e5<\/p>\n<pre class=\"code\">EXPLAIN SELECT * FROM your_table WHERE some_column = some_value; <\/pre>\n<p><strong>\u9690\u5f0f\u8f6c\u6362\u662f\u6709\u53ef\u80fd\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u7684<\/strong><\/p>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n<h2>MySql\u7684\u7d22\u5f15<\/h2>\n<h3>\u805a\u7c07\u548c\u975e\u805a\u7c07\u7d22\u5f15<\/h3>\n<p><strong>\u805a\u7c07\u7d22\u5f15<\/strong>\uff0c\u4ed6\u7684\u53f6\u5b50\u8282\u70b9\u5b58\u50a8\u4e86\u6bcf\u4e00\u5217\u7684\u4fe1\u606f\uff0c\u4e5f\u5c31\u662f\u8bf4\u5305\u542b\u4e86\u4e00\u4e2a\u5b8c\u6574\u7684\u8bb0\u5f55\u884c<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/21\/imagedf906c95e3b0975e.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/21\/imagedf906c95e3b0975e.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p><strong>\u975e\u805a\u7c07\u7d22\u5f15<\/strong><\/p>\n<p>\u5b83\u7684\u53f6\u5b50\u8282\u70b9\u53ea\u5305\u542b\u4e00\u4e2a\u4e3b\u952e\u503c\uff0c\u901a\u8fc7\u975e\u805a\u7c07\u7d22\u5f15\u67e5\u627e\u8bb0\u5f55\u8981\u5148\u627e\u5230\u4e3b\u952e\uff0c\u7136\u540e\u901a\u8fc7\u4e3b\u952e\u518d\u5230\u805a\u7c07\u7d22\u5f15\u4e2d\u627e\u5230\u5bf9\u5e94\u7684\u8bb0\u5f55\u884c\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u88ab\u79f0\u4e3a<strong>\u56de\u8868<\/strong>\u3002<\/p>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/21\/image6b95043684803ec8.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/21\/image6b95043684803ec8.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<h3>\u8986\u76d6\u7d22\u5f15<\/h3>\n<p>\u975e\u805a\u7c07\u7d22\u5f15\u4e2d\u56e0\u4e3a\u4e0d\u542b\u6709\u5b8c\u6574\u7684\u6570\u636e\u4fe1\u606f\uff0c\u67e5\u627e\u5b8c\u6574\u7684\u6570\u636e\u8bb0\u5f55\u9700\u8981<strong>\u56de\u8868<\/strong>\uff0c\u6240\u4ee5\u4e00\u6b21\u67e5\u8be2\u64cd\u4f5c\u5b9e\u9645\u4e0a\u8981\u505a\u4e24\u6b21\u7d22\u5f15\u67e5\u8be2\u3002\u800c\u5982\u679c\u6240\u6709\u7684\u7d22\u5f15\u67e5\u8be2\u90fd\u8981\u7ecf\u8fc7\u4e24\u6b21\u624d\u80fd\u67e5\u5230\uff0c\u90a3\u4e48\u80af\u5b9a\u4f1a\u5f15\u8d77\u6548\u7387\u4e0b\u964d\uff0c\u6bd5\u7adf\u80fd\u5c11\u67e5\u4e00\u6b21\u5c31\u5c11\u67e5\u4e00\u6b21\u3002<\/p>\n<p><strong>\u4e0d\u7528\u56de\u8868\uff0c\u9700\u8981\u67e5\u8be2\u7684\u5217\u90fd\u6d89\u53ca\u5e76\u5b58\u50a8\u5728\u7d22\u5f15\u91cc\u4e86<\/strong><\/p>\n<h3>\u8054\u5408\u7d22\u5f15<\/h3>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/img.picgo.net\/2024\/10\/21\/image5ee9e830f9bf343f.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  decoding=\"async\" data-original=\"https:\/\/img.picgo.net\/2024\/10\/21\/image5ee9e830f9bf343f.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"image\" border=\"0\" \/><\/div><\/p>\n<p>\u8054\u5408\u7d22\u5f15\u4f1a\u6d89\u53ca\u5230\u6700\u5de6\u524d\u7f00\u5339\u914d\u539f\u5219\uff0c\u8fd8\u6709\u4e00\u4e2a\u7d22\u5f15\u4e0b\u63a8\uff0c\u8fd9\u91cc\u89e3\u91ca\u4e00\u4e0b\u7d22\u5f15\u4e0b\u63a8<\/p>\n<p>\u65b0\u7248\u672c\u7684 MySql\uff085.6\u4ee5\u4e0a\uff09\u4e2d\u5f15\u5165\u4e86\u7d22\u5f15\u4e0b\u63a8\u7684\u673a\u5236\uff1a\u53ef\u4ee5\u5728\u7d22\u5f15\u904d\u5386\u8fc7\u7a0b\u4e2d\uff0c\u5bf9\u7d22\u5f15\u4e2d\u5305\u542b\u7684\u5b57\u6bb5\u5148\u505a\u5224\u65ad\uff0c\u76f4\u63a5\u8fc7\u6ee4\u6389\u4e0d\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\uff0c\u51cf\u5c11\u56de\u8868\u6b21\u6570\u3002<\/p>\n<p>\u4f8b\u5982\u9488\u5bf9\u4e0a\u9762\u8868\u4e2d\u7684\uff08name\u3001age\uff09\u505a\u8054\u5408\u7d22\u5f15\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\u7684\u67e5\u8be2\u903b\u8f91\uff1a<\/p>\n<p>\u901a\u8fc7 name \u627e\u5230\u5bf9\u5e94\u7684\u4e3b\u952e ID\uff1b<br \/>\u6839\u636e id \u8bb0\u5f55\u7684\u5217\u5339\u914d age \u6761\u4ef6\u3002<br \/>\u8fd9\u79cd\u505a\u6cd5\u4f1a\u5bfc\u81f4\u5f88\u591a\u4e0d\u5fc5\u8981\u7684\u56de\u8868\uff0c\u4f8b\u5982\u8868\u4e2d\u5b58\u5728\uff08\u5f20\u4e09\u300110\uff09\u548c\uff08\u5f20\u4e09\u300115\uff09\u4e24\u6761\u8bb0\u5f55\uff0c\u6b64\u523b\u8981\u67e5\u8be2\uff08\u5f20\u4e09\u300120\uff09\u7684\u8bb0\u5f55\u3002\u67e5\u8be2\u65f6\u5148\u901a\u8fc7\u5f20\u4e09\u5b9a\u4f4d\u5230\u6240\u6709\u7b26\u5408\u6761\u4ef6\u7684\u4e3b\u952e ID\uff0c\u7136\u540e\u5728\u805a\u7c07\u7d22\u5f15\u4e2d\u904d\u5386\u6ee1\u8db3\u6761\u4ef6\u7684\u884c\uff0c\u770b\u662f\u5426\u6709\u7b26\u5408 age = 20 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