{"id":202722,"date":"2025-05-22T10:31:34","date_gmt":"2025-05-22T02:31:34","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202722\/"},"modified":"2025-05-22T10:31:34","modified_gmt":"2025-05-22T02:31:34","slug":"%e6%9c%89%e5%93%aa%e4%ba%9b%e5%b7%a5%e5%85%b7%e5%8f%af%e4%bb%a5%e5%88%86%e6%9e%90-java-%e5%87%bd%e6%95%b0%e7%9a%84%e6%89%a7%e8%a1%8c%e6%95%88%e7%8e%87%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202722\/","title":{"rendered":"\u6709\u54ea\u4e9b\u5de5\u5177\u53ef\u4ee5\u5206\u6790 Java \u51fd\u6570\u7684\u6267\u884c\u6548\u7387\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u6709\u54ea\u4e9b\u5de5\u5177\u53ef\u4ee5\u5206\u6790 Java \u51fd\u6570\u7684\u6267\u884c\u6548\u7387\uff1f<\/h1>\n<p>\u7f16\u7a0b\u5e76\u4e0d\u662f\u4e00\u4e2a\u673a\u68b0\u6027\u7684\u5de5\u4f5c\uff0c\u800c\u662f\u9700\u8981\u6709\u601d\u8003\uff0c\u6709\u521b\u65b0\u7684\u5de5\u4f5c\uff0c\u8bed\u6cd5\u662f\u56fa\u5b9a\u7684\uff0c\u4f46\u89e3\u51b3\u95ee\u9898\u7684\u601d\u8def\u5219\u662f\u4f9d\u9760\u4eba\u7684\u601d\u7ef4\uff0c\u8fd9\u5c31\u9700\u8981\u6211\u4eec\u575a\u6301\u5b66\u4e60\u548c\u66f4\u65b0\u81ea\u5df1\u7684\u77e5\u8bc6\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300a\u6709\u54ea\u4e9b\u5de5\u5177\u53ef\u4ee5\u5206\u6790 Java \u51fd\u6570\u7684\u6267\u884c\u6548\u7387\uff1f\u300b\uff0c\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\uff0c\u5982\u679c\u4f60\u5bf9\u6587\u7ae0\u65b9\u9762\u7684\u77e5\u8bc6\u70b9\u611f\u5174\u8da3\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\uff0c\u5728\u8fd9\u53ef\u4ee5\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5f00\u53d1\u80fd\u529b\u7684\u63d0\u5347\u3002<\/p>\n<p>\u5206\u6790 Java \u51fd\u6570\u6267\u884c\u6548\u7387\uff0c\u53ef\u4f7f\u7528 Java \u6027\u80fd\u76d1\u89c6\u5668 (JMC)\u3001visualVM \u7b49\u5de5\u5177\u3002\u4f7f\u7528\u65b9\u6cd5\u4e3a\uff1a\u542f\u52a8\u5de5\u5177\uff0c\u9009\u62e9\u8981\u76d1\u63a7\u7684\u8fdb\u7a0b\uff0c\u5bfc\u822a\u5230\u5206\u6790\u9009\u9879\u5361\uff0c\u4f7f\u7528\u706b\u7130\u56fe\u6216\u5176\u4ed6\u5206\u6790\u5de5\u5177\u8bc6\u522b\u6162\u901f\u65b9\u6cd5\u3002\u5b9e\u6218\u6848\u4f8b\u4e2d\uff0c\u901a\u8fc7\u5bf9 findByUsername() \u65b9\u6cd5\u8fdb\u884c\u7d22\u5f15\uff0c\u5927\u5e45\u5ea6\u63d0\u9ad8\u4e86\u767b\u5f55\u529f\u80fd\u7684\u6267\u884c\u6548\u7387\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729936400671cbc102c433.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5982\u4f55\u5206\u6790 Java \u51fd\u6570\u7684\u6267\u884c\u6548\u7387<\/strong><\/p>\n<p><strong>\u5f15\u8a00<\/strong><\/p>\n<p>\u5206\u6790 Java \u51fd\u6570\u7684\u6267\u884c\u6548\u7387\u81f3\u5173\u91cd\u8981\uff0c\u53ef\u4ee5\u5e2e\u52a9\u60a8\u8bc6\u522b\u74f6\u9888\u5e76\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\u3002\u672c\u6587\u4ecb\u7ecd\u4e86\u53ef\u7528\u4e8e\u5206\u6790 Java \u51fd\u6570\u6267\u884c\u6548\u7387\u7684\u5de5\u5177\u548c\u6280\u672f\u3002<\/p>\n<p><strong>\u5de5\u5177<\/strong><\/p>\n<ul>\n<li><strong>Java \u6027\u80fd\u76d1\u89c6\u5668 (JMC)<\/strong>\uff1a\u63d0\u4f9b\u56fe\u5f62\u5316\u754c\u9762\u6765\u5206\u6790 Java \u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u8bca\u65ad\u95ee\u9898\u3002<\/li>\n<li><strong>visualVM<\/strong>\uff1a\u4e00\u4e2a\u8de8\u5e73\u53f0\u7684 Java \u6027\u80fd\u5206\u6790\u548c\u76d1\u63a7\u5de5\u5177\u3002<\/li>\n<li><strong>jProfiler<\/strong>\uff1a\u4e00\u4e2a\u5546\u7528\u5de5\u5177\uff0c\u63d0\u4f9b\u5bf9 Java \u4ee3\u7801\u7684\u6df1\u5165\u5206\u6790\u3002<\/li>\n<li><strong>YourKit Java Profiler<\/strong>\uff1a\u53e6\u4e00\u4e2a\u5546\u7528\u5de5\u5177\uff0c\u4e13\u6ce8\u4e8e Java \u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u5206\u6790\u3002<\/li>\n<\/ul>\n<p><strong>\u7528\u6cd5<\/strong><\/p>\n<p><strong>\u4f7f\u7528 JMC<\/strong><\/p>\n<ol>\n<li>\u542f\u52a8 JMC\uff0c\u9009\u62e9\u8981\u76d1\u63a7\u7684 Java \u8fdb\u7a0b\u3002<\/li>\n<li>\u5bfc\u822a\u5230\u201c\u5206\u6790\u201d\u9009\u9879\u5361\uff0c\u7136\u540e\u9009\u62e9\u201c\u542f\u52a8\u8bca\u65ad\u4f1a\u8bdd\u201d\u3002<\/li>\n<li>\u7b49\u5f85\u8bca\u65ad\u4f1a\u8bdd\u5b8c\u6210\uff0c\u7136\u540e\u67e5\u770b\u6536\u96c6\u7684\u6570\u636e\u3002<\/li>\n<li>\u4f7f\u7528\u706b\u7130\u56fe\u6216\u5176\u4ed6\u5206\u6790\u5de5\u5177\u8bc6\u522b\u6162\u901f\u65b9\u6cd5\u3002<\/li>\n<\/ol>\n<p><strong>\u4f7f\u7528 visualVM<\/strong><\/p>\n<ol>\n<li>\u542f\u52a8 visualVM\uff0c\u7136\u540e\u8fde\u63a5\u5230\u8981\u76d1\u63a7\u7684 Java \u8fdb\u7a0b\u3002<\/li>\n<li>\u5bfc\u822a\u5230\u201c\u76d1\u89c6\u5668\u201d\u9009\u9879\u5361\uff0c\u7136\u540e\u9009\u62e9\u201c\u5206\u6790\u201d\u3002<\/li>\n<li>\u9009\u62e9\u201cCPU \u8c03\u7528\u6811\u201d\u6216\u201cCPU \u4f7f\u7528\u201d\u89c6\u56fe\u3002<\/li>\n<li>\u5206\u6790\u6570\u636e\u4ee5\u8bc6\u522b\u8017\u65f6\u7684\u51fd\u6570\u3002<\/li>\n<\/ol>\n<p><strong>\u4f7f\u7528 jProfiler<\/strong><\/p>\n<ol>\n<li>\u5bfc\u5165 Java \u9879\u76ee\u5230 jProfiler \u4e2d\u3002<\/li>\n<li>\u4f7f\u7528\u201c\u5206\u6790\u201d\u9009\u9879\u5361\uff0c\u7136\u540e\u9009\u62e9\u201cCPU\u201d\u6216\u201c\u5185\u5b58\u201d\u89c6\u56fe\u3002<\/li>\n<li>\u4f7f\u7528\u706b\u7130\u56fe\u6216\u8868\u89c6\u56fe\u5206\u6790\u51fd\u6570\u7684\u6267\u884c\u65f6\u95f4\u3002<\/li>\n<\/ol>\n<p><strong>\u4f7f\u7528 YourKit Java Profiler<\/strong><\/p>\n<ol>\n<li>\u6253\u5f00 Java \u9879\u76ee\u5e76\u5728 yourKit Java Profiler \u4e2d\u542f\u52a8\u5206\u6790\u3002<\/li>\n<li>\u4f7f\u7528\u201c\u5206\u6790\u201d\u9009\u9879\u5361\uff0c\u7136\u540e\u9009\u62e9\u201cCPU\u201d\u6216\u201c\u5185\u5b58\u201d\u89c6\u56fe\u3002<\/li>\n<li>\u5206\u6790\u6570\u636e\u4ee5\u8bc6\u522b\u8017\u65f6\u7684\u51fd\u6570\u3002<\/li>\n<\/ol>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u5728\u4e00\u4e2a\u7535\u5b50\u5546\u52a1\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u6211\u4eec\u5e0c\u671b\u5206\u6790\u7528\u6237\u767b\u5f55\u529f\u80fd\u7684\u6267\u884c\u6548\u7387\u3002<\/p>\n<pre>public boolean login(String username, String password) {\n    try {\n        \/\/ \u9a8c\u8bc1\u7528\u6237\u662f\u5426\u5b58\u5728\n        User user = userRepository.findByUsername(username);\n        if (user == null) {\n            return false;\n        }\n\n        \/\/ \u9a8c\u8bc1\u5bc6\u7801\n        return passwordMatcher.matches(password, user.getPassword());\n    } catch (Exception e) {\n        \/\/ \u5904\u7406\u5f02\u5e38\n        return false;\n    }\n}<\/pre>\n<p>\u4f7f\u7528\u4e0a\u8ff0\u5de5\u5177\u4e4b\u4e00\uff0c\u6211\u4eec\u53d1\u73b0 <code>findByUsername()<\/code> \u65b9\u6cd5\u975e\u5e38\u8017\u65f6\u3002\u901a\u8fc7\u5bf9\u6570\u636e\u5e93\u8fdb\u884c\u7d22\u5f15\uff0c\u6211\u4eec\u80fd\u591f\u5927\u5e45\u5ea6\u63d0\u9ad8\u51fd\u6570\u7684\u6267\u884c\u6548\u7387\u3002<\/p>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>\u901a\u8fc7\u4f7f\u7528 Java \u6027\u80fd\u5206\u6790\u5de5\u5177\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u5206\u6790 Java \u51fd\u6570\u7684\u6267\u884c\u6548\u7387\u5e76\u8bc6\u522b\u74f6\u9888\u3002\u8fd9\u53ef\u4ee5\u5e2e\u52a9\u60a8\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\uff0c\u5e76\u786e\u4fdd\u9ad8\u6548\u548c\u54cd\u5e94\u8fc5\u901f\u7684\u7cfb\u7edf\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u6709\u54ea\u4e9b\u5de5\u5177\u53ef\u4ee5\u5206\u6790 Java \u51fd\u6570\u7684\u6267\u884c\u6548\u7387\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6709\u54ea\u4e9b\u5de5\u5177\u53ef\u4ee5\u5206\u6790 Java \u51fd&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-202722","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202722","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202722"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202722\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}