{"id":1132,"date":"2020-09-09T20:05:02","date_gmt":"2020-09-09T12:05:02","guid":{"rendered":"http:\/\/www.rain1024.com\/?p=1132"},"modified":"2023-08-07T20:57:24","modified_gmt":"2023-08-07T12:57:24","slug":"java%e6%80%a7%e8%83%bd%e8%b0%83%e4%bc%98%e5%88%86%e4%ba%ab","status":"publish","type":"post","link":"http:\/\/rain1024.com\/index.php\/2020\/09\/09\/java%e6%80%a7%e8%83%bd%e8%b0%83%e4%bc%98%e5%88%86%e4%ba%ab\/","title":{"rendered":"Java\u6027\u80fd\u8c03\u4f18\u5206\u4eab"},"content":{"rendered":"

Java\u6027\u80fd\u8c03\u4f18\u5206\u4eab<\/h1>\n

\u8fd9\u6b21\u5206\u4eab\u8fd8\u662f\u4e4b\u524d\u5728\u516c\u53f8\u5bf9\u9879\u76ee\u8fdb\u884c\u6027\u80fd\u8c03\u4f18\u65f6\uff0c\u524d\u671f\u7684\u8c03\u7814\uff0c\u4ee5\u53ca\u79ef\u7d2f\u7684\u4e00\u4e9b\u7ecf\u9a8c\uff0c\u4e4b\u524d\u516c\u53f8\u4ea7\u54c1\u9762\u5bf9\u7684\u7528\u6237\u5e76\u53d1\u91cf\u8f83\u5c0f\uff0c\u6240\u4ee5\u6d4b\u8bd5\u901a\u8fc7\u540e\u76f4\u63a5\u4e0a\u7ebf\uff0c\u4e0d\u9700\u8981\u6839\u636e\u5176\u4ed6\u7ef4\u5ea6\u6765\u8fdb\u884c\u5206\u6790\u4f18\u5316\uff0c\u540e\u6765\u9886\u5bfc\u5bf9\u6211\u8d1f\u8d23\u7684\u7cfb\u7edf\u63d0\u51fa\u4e86\u5e76\u53d1\u7684\u8981\u6c42\uff0c\u60f3\u77e5\u9053\u7cfb\u7edf\u80fd\u627f\u53d7\u7684\u5e76\u53d1\u91cf\u662f\u591a\u5c11\uff0c\u65f6\u5ef6\u4f1a\u8fbe\u5230\u591a\u957f\uff0c\u6839\u636e\u8fd9\u4e9b\u9700\u6c42\uff0c\u8fdb\u884c\u4e00\u7cfb\u5217\u538b\u6d4b\u3002<\/h3>\n

1.\u4e3a\u4ec0\u4e48\u8981\u505a\u6027\u80fd\u4f18\u5316<\/h3>\n
    \n
  1. #### \u7cfb\u7edf\u89d2\u5ea6<\/li>\n<\/ol>\n

    \u4e00\u6b3e\u7ebf\u4e0a\u4ea7\u54c1\u5982\u679c\u6ca1\u6709\u7ecf\u8fc7\u6027\u80fd\u6d4b\u8bd5\uff0c\u90a3\u5b83\u5c31\u597d\u6bd4\u662f\u4e00\u9897\u5b9a\u65f6\u70b8\u5f39\uff0c\u4f60\u4e0d\u77e5\u9053\u5b83\u4ec0\u4e48\u65f6\u5019\u4f1a\u51fa\u73b0\u95ee\u9898\uff0c\u4f60\u4e5f\u4e0d\u6e05\u695a\u5b83\u80fd\u627f\u53d7\u7684\u6781\u9650\u5728\u54ea\u513f\u3002\u6709\u4e9b\u6027\u80fd\u95ee\u9898\u662f\u65f6\u95f4\u7d2f\u79ef\u6162\u6162\u4ea7\u751f\u7684\uff0c\u5230\u4e86\u4e00\u5b9a\u65f6\u95f4\u81ea\u7136\u5c31\u7206\u70b8\u4e86\uff1b\u800c\u66f4\u591a\u7684\u6027\u80fd\u95ee\u9898\u662f\u7531\u8bbf\u95ee\u91cf\u7684\u6ce2\u52a8\u5bfc\u81f4\u7684\uff0c\u7b49\u5230\u7528\u6237\u91cf\u4e0a\u6765\u5c31\u4f1a\u5954\u6e83\u3002
    \n\u6240\u6709\u7684\u7cfb\u7edf\u5728\u5f00\u53d1\u5b8c\u4e4b\u540e\uff0c\u591a\u591a\u5c11\u5c11\u90fd\u4f1a\u6709\u6027\u80fd\u95ee\u9898\uff0c\u6211\u4eec\u9996\u5148\u8981\u505a\u7684\u5c31\u662f\u60f3\u529e\u6cd5\u628a\u95ee\u9898\u66b4\u9732\u51fa\u6765\uff0c\u4f8b\u5982\u8fdb\u884c\u538b\u529b\u6d4b\u8bd5\u3001\u6a21\u62df\u53ef\u80fd\u7684\u64cd\u4f5c\u573a\u666f\u7b49\u7b49\uff0c\u518d\u901a\u8fc7\u6027\u80fd\u8c03\u4f18\u53bb\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\u3002<\/p>\n

      \n
    1. #### \u4e2a\u4eba\u89d2\u5ea6<\/li>\n<\/ol>\n

      \u5bf9\u6280\u672f\u80fd\u529b\u7684\u63d0\u5347\uff0c\u5f3a\u5316\u601d\u7ef4\u65b9\u5f0f
      \n\u8c03\u4f18\u7684\u5bf9\u8c61\u4e0d\u662f\u5355\u4e00\u7684\u5e94\u7528\u670d\u52a1\uff0c\u6027\u80fd\u53ef\u80fd\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u3001\u7f51\u7edc\u3001\u6570\u636e\u5e93\u7b49\u7ec4\u4ef6\u76f8\u5173\uff0c\u6240\u4ee5\u6211\u4eec\u9700\u8981\u50a8\u5907\u64cd\u4f5c\u7cfb\u7edf\u3001\u7f51\u7edc\u534f\u8bae\u4ee5\u53ca\u6570\u636e\u5e93\u7b49\u57fa\u7840\u77e5\u8bc6\u3002\u5177\u4f53\u7684\u6027\u80fd\u95ee\u9898\u5f80\u5f80\u8fd8\u4e0e\u4f20\u8f93\u3001\u8ba1\u7b97\u3001\u5b58\u50a8\u6570\u636e\u7b49\u76f8\u5173\uff0c\u90a3\u6211\u4eec\u8fd8\u9700\u8981\u50a8\u5907\u6570\u636e\u7ed3\u6784\u3001\u7b97\u6cd5\u4ee5\u53ca\u6570\u5b66\u7b49\u57fa\u7840\u77e5\u8bc6\u3002<\/p>\n

        \n
      1. \n

        \u4ece\u66f4\u9ad8\u7684\u89d2\u5ea6\u601d\u8003\u548c\u603b\u7ed3<\/h4>\n

        \u6211\u4eec\u5728\u4f7f\u7528\u4e00\u9879\u6280\u672f\u65f6\uff0c\u4ece\u6765\u4e0d\u95ee\u81ea\u5df1\uff1a\u4e3a\u4ec0\u4e48\u8fd9\u9879\u6280\u672f\u53ef\u4ee5\u63d0\u5347\u7cfb\u7edf\u6027\u80fd\uff1f\u5bf9\u6bd4\u5176\u4ed6\u6280\u672f\u5b83\u597d\u5728\u54ea\u513f\uff1f\u5b9e\u73b0\u7684\u539f\u7406\u53c8\u662f\u4ec0\u4e48\u5462\uff1f\u53ea\u6709\u6df1\u5165\u6e90\u7801\uff0c\u901a\u8fc7\u5206\u6790\u6765\u5b66\u4e60\u3001\u603b\u7ed3\u4e00\u9879\u6280\u672f\u7684\u5b9e\u73b0\u539f\u7406\u548c\u4f18\u7f3a\u70b9\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u80fd\u66f4\u5ba2\u89c2\u5730\u53bb\u5b66\u4e60\u4e00\u9879\u6280\u672f\uff0c\u624d\u80fd\u5728\u9047\u5230\u6027\u80fd\u95ee\u9898\u65f6\uff0c\u505a\u5230\u89e6\u7c7b\u65c1\u901a\u3002<\/p>\n<\/li>\n<\/ol>\n

        2. \u6027\u80fd\u4f53\u73b0\u5728\u54ea\u91cc<\/h3>\n

        \u54ea\u4e9b\u8ba1\u7b97\u673a\u8d44\u6e90\u4f1a\u6210\u4e3a\u7cfb\u7edf\u7684\u6027\u80fd\u74f6\u9888<\/h4>\n
          \n
        1. CPU
          \n\u5f53CPU\u5360\u7528\u7387\u592a\u9ad8\u65f6\uff0c\u9700\u8981\u53bb\u5206\u6790\u4ee3\u7801\u9012\u5f52\u5bfc\u81f4\u7684\u65e0\u9650\u5faa\u73af\uff0c\u6b63\u5219\u8868\u8fbe\u5f0f\u5f15\u8d77\u7684\u56de\u6eaf\uff0cJVM \u9891\u7e41\u7684 FULL GC\uff0c\u4ee5\u53ca\u591a\u7ebf\u7a0b\u9020\u6210\u7684\u5927\u91cf\u4e0a\u4e0b\u6587\u5207\u6362\u7b49\uff0c\u8fd9\u4e9b\u90fd\u6709\u53ef\u80fd\u5bfc\u81f4 CPU \u8d44\u6e90\u7e41\u5fd9\u3002<\/li>\n
        2. \u5185\u5b58
          \nJava\u4e00\u822c\u901a\u8fc7 JVM \u5bf9\u5185\u5b58\u8fdb\u884c\u5206\u914d\u7ba1\u7406\uff0c\u4e3b\u8981\u4f7f\u7528JVM\u4e2d\u7684\u5806\u6765\u5b58\u50a8\u521b\u5efa\u7684\u5bf9\u8c61\u3002\u5f53\u5185\u5b58\u7a7a\u95f4\u88ab\u5360\u6ee1\uff0c\u5bf9\u8c61\u65e0\u6cd5\u56de\u6536\u65f6\uff0c\u5c31\u4f1a\u5bfc\u81f4\u5185\u5b58\u6ea2\u51fa\u3001\u5185\u5b58\u6cc4\u9732\u7b49\u95ee\u9898<\/li>\n
        3. \u78c1\u76d8 I\/O
          \n\u78c1\u76d8\u8bfb\u5199\u6027\u80fd\u5f71\u54cd<\/li>\n
        4. \u7f51\u7edc
          \n\u5e26\u5bbd\u8fc7\u4f4e\u7684\u8bdd\uff0c\u5bf9\u4e8e\u4f20\u8f93\u6570\u636e\u6bd4\u8f83\u5927\uff0c\u6216\u8005\u662f\u5e76\u53d1\u91cf\u6bd4\u8f83\u5927\u7684\u7cfb\u7edf\uff0c\u7f51\u7edc\u5c31\u5f88\u5bb9\u6613\u6210\u4e3a\u6027\u80fd\u74f6\u9888\u3002<\/li>\n
        5. \u6570\u636e\u5e93
          \n\u6570\u636e\u5e93\u7684\u64cd\u4f5c\u5f80\u5f80\u662f\u6d89\u53ca\u5230\u78c1\u76d8 I\/O \u7684\u8bfb\u5199\u3002\u5927\u91cf\u7684\u6570\u636e\u5e93\u8bfb\u5199\u64cd\u4f5c\uff0c\u4f1a\u5bfc\u81f4\u78c1\u76d8 I\/O \u6027\u80fd\u74f6\u9888\uff0c\u8fdb\u800c\u5bfc\u81f4\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u5ef6\u8fdf\u6027\uff0c\u7531\u4e8eGateway\u4e0d\u6d89\u53ca\u6570\u636e\u5e93\u7684\u64cd\u4f5c\uff0c\u672c\u6b21\u4e0d\u4f5c\u4e3a\u5206\u6790\u91cd\u70b9<\/li>\n
        6. \u9501\u7ade\u4e89
          \n\u5728\u5e76\u53d1\u7f16\u7a0b\u4e2d\uff0c\u7ecf\u5e38\u9700\u8981\u591a\u4e2a\u7ebf\u7a0b\u5171\u4eab\u8bfb\u5199\u64cd\u4f5c\u540c\u4e00\u4e2a\u8d44\u6e90\uff0c\u8fd9\u4e2a\u65f6\u5019\u4e3a\u4e86\u4fdd\u6301\u6570\u636e\u7684\u539f\u5b50\u6027\uff0c\u5c31\u4f1a\u8fdb\u884c\u52a0\u9501\u64cd\u4f5c\u3002\u9501\u7684\u4f7f\u7528\u53ef\u80fd\u4f1a\u5e26\u6765\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u4ece\u800c\u7ed9\u7cfb\u7edf\u5e26\u6765\u6027\u80fd\u5f00\u9500\u3002<\/li>\n
        7. \u5f02\u5e38\u5904\u7406
          \nJava \u5e94\u7528\u4e2d\uff0c\u629b\u51fa\u5f02\u5e38\u9700\u8981\u6784\u5efa\u5f02\u5e38\u6808\uff0c\u5bf9\u6808\u8fdb\u884c\u5feb\u7167\uff0c\u4ee5\u4fbf\u5bf9\u5f02\u5e38\u8fdb\u884c\u6355\u83b7\u548c\u5904\u7406\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u975e\u5e38\u6d88\u8017\u7cfb\u7edf\u6027\u80fd\u3002\u5982\u679c\u5728\u9ad8\u5e76\u53d1\u7684\u60c5\u51b5\u4e0b\u5f15\u53d1\u5f02\u5e38\uff0c\u6301\u7eed\u5730\u8fdb\u884c\u5f02\u5e38\u5904\u7406\uff0c\u90a3\u4e48\u7cfb\u7edf\u7684\u6027\u80fd\u5c31\u4f1a\u660e\u663e\u5730\u53d7\u5230\u5f71\u54cd\u3002<\/li>\n<\/ol>\n

          3. \u6211\u4eec\u5e38\u8bf4\u7684\u7528\u6765\u8861\u91cf\u7cfb\u7edf\u6027\u80fd\u7684\u6307\u6807\u5230\u5e95\u662f\u6307\u4ec0\u4e48\uff0c<\/h3>\n
            \n
          1. \u54cd\u5e94\u65f6\u95f4
            \n\u54cd\u5e94\u65f6\u95f4\u662f\u8861\u91cf\u7cfb\u7edf\u6027\u80fd\u7684\u91cd\u8981\u6307\u6807\u4e4b\u4e00\uff0c\u54cd\u5e94\u65f6\u95f4\u8d8a\u77ed\uff0c\u6027\u80fd\u8d8a\u597d
            \n\u6570\u636e\u5e93\u54cd\u5e94\u65f6\u95f4
            \n\u670d\u52a1\u7aef\u54cd\u5e94\u65f6\u95f4
            \n\u7f51\u7edc\u54cd\u5e94\u65f6\u95f4<\/li>\n
          2. \u541e\u5410\u91cf
            \nTPS\uff08\u6bcf\u79d2\u4e8b\u52a1\u5904\u7406\u91cf\uff09 \u4f53\u73b0\u4e86\u63a5\u53e3\u7684\u6027\u80fd\uff0cTPS \u8d8a\u5927\uff0c\u6027\u80fd\u8d8a\u597d
            \n\u78c1\u76d8\u541e\u5410\u91cf<\/strong>
            \n\u7f51\u7edc\u541e\u5410\u91cf<\/strong><\/li>\n
          3. \u8d44\u6e90\u5360\u7528\u7387
            \nCPU \u5360\u7528\u7387\u3001\u5185\u5b58\u4f7f\u7528\u7387\u3001\u78c1\u76d8 I\/O\u3001\u7f51\u7edc I\/O \u6765\u8868\u793a\u8d44\u6e90\u4f7f\u7528\u7387<\/li>\n<\/ol>\n

            4. \u9047\u5230\u7684\u5751<\/h3>\n
              \n
            1. \n

              \u538b\u6d4b\u5de5\u5177\u7684\u9009\u62e9<\/p>\n<\/li>\n

            2. \n

              \u670d\u52a1\u5668\u7684\u9009\u62e9<\/p>\n<\/li>\n

            3. \n

              \u4ee3\u7801\u903b\u8f91\u7684\u95ee\u9898<\/p>\n<\/li>\n<\/ol>\n

              5. \u4e0d\u597d\u6d4b\u8bd5<\/h3>\n
                \n
              1. \n

                \u6d4b\u8bd5\u5de5\u5177\u548c\u670d\u52a1\u5668\u7684\u9009\u62e9<\/p>\n

                \u6027\u80fd\u6d4b\u8bd5\u7ed3\u679c\u4e0d\u7a33\u5b9a\uff0c\u6211\u4eec\u5728\u505a\u6027\u80fd\u6d4b\u8bd5\u65f6\u53d1\u73b0\uff0c\u6bcf\u6b21\u6d4b\u8bd5\u5904\u7406\u7684\u6570\u636e\u96c6\u90fd\u662f\u4e00\u6837\u7684\uff0c\u4f46\u6d4b\u8bd5\u7ed3\u679c\u5374\u6709\u5dee\u5f02\u3002\u8fd9\u662f\u56e0\u4e3a\u6d4b\u8bd5\u65f6\uff0c\u4f34\u968f\u7740\u5f88\u591a\u4e0d\u7a33\u5b9a\u56e0\u7d20\uff0c\u6bd4\u5982\u673a\u5668\u5176\u4ed6\u8fdb\u7a0b\u7684\u5f71\u54cd\u3001\u7f51\u7edc\u6ce2\u52a8\u4ee5\u53ca\u6bcf\u4e2a\u9636\u6bb5 JVM \u5783\u573e\u56de\u6536\u7684\u4e0d\u540c\u7b49\u7b49\u3002
                \n\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u591a\u6b21\u6d4b\u8bd5\uff0c\u5c06\u6d4b\u8bd5\u7ed3\u679c\u6c42\u5e73\u5747\uff0c\u6216\u8005\u7edf\u8ba1\u4e00\u4e2a\u66f2\u7ebf\u56fe\uff0c\u53ea\u8981\u4fdd\u8bc1\u6211\u4eec\u7684\u5e73\u5747\u503c\u662f\u5728\u5408\u7406\u8303\u56f4\u4e4b\u5185\uff0c\u800c\u4e14\u6ce2\u52a8\u4e0d\u662f\u5f88\u5927\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6027\u80fd\u6d4b\u8bd5\u5c31\u662f\u901a\u8fc7\u7684<\/p>\n<\/li>\n

              2. \n

                \u591a JVM \u60c5\u51b5\u4e0b\u7684\u5f71\u54cd<\/p>\n

                \u5982\u679c\u6211\u4eec\u7684\u670d\u52a1\u5668\u6709\u591a\u4e2a Java \u5e94\u7528\u670d\u52a1\uff0c\u90e8\u7f72\u5728\u4e0d\u540c\u7684 Tomcat \u4e0b\uff0c\u8fd9\u5c31\u610f\u5473\u7740\u6211\u4eec\u7684\u670d\u52a1\u5668\u4f1a\u6709\u591a\u4e2a JVM\u3002\u4efb\u610f\u4e00\u4e2a JVM \u90fd\u62e5\u6709\u6574\u4e2a\u7cfb\u7edf\u7684\u8d44\u6e90\u4f7f\u7528\u6743\u3002\u5982\u679c\u4e00\u53f0\u673a\u5668\u4e0a\u53ea\u90e8\u7f72\u5355\u72ec\u7684\u4e00\u4e2a JVM\uff0c\u5728\u505a\u6027\u80fd\u6d4b\u8bd5\u65f6\uff0c\u6d4b\u8bd5\u7ed3\u679c\u5f88\u597d\uff0c\u6216\u8005\u4f60\u8c03\u4f18\u7684\u6548\u679c\u5f88\u597d\uff0c\u4f46\u5728\u4e00\u53f0\u673a\u5668\u591a\u4e2a JVM \u7684\u60c5\u51b5\u4e0b\u5c31\u4e0d\u4e00\u5b9a\u4e86\u3002\u6240\u4ee5\u6211\u4eec\u5e94\u8be5\u5c3d\u91cf\u907f\u514d\u7ebf\u4e0a\u73af\u5883\u4e2d\u4e00\u53f0\u673a\u5668\u90e8\u7f72\u591a\u4e2a JVM \u7684\u60c5\u51b5\u3002<\/p>\n<\/li>\n<\/ol>\n

                6.\u4e0d\u597d\u5206\u6790<\/h3>\n

                \u541e\u5410\u91cf\u548c\u5ef6\u65f6\u662f\u5171\u540c\u51fa\u73b0\u7684\uff0c\u5f80\u5f80\u538b\u6d4b\u7684\u65f6\u5019\u6ca1\u6709\u6807\u51c6\u53ef\u8a00\uff0c\u6211\u4eec\u4e0d\u77e5\u9053\u6027\u80fd\u7684\u5cf0\u503c\u662f\u591a\u5c11\uff0c\u8fd9\u6b21Gateway\u56e0\u4e3a\u4f7f\u7528\u7684\u5b98\u65b9\u6846\u67b6\uff0c\u6240\u4ee5\u6709\u4e86\u53ef\u4ee5\u53c2\u8003\u7684\u6807\u51c6\u3002<\/p>\n

                  \n
                1. \u4e0d\u77e5\u9053\u5177\u4f53\u54ea\u91cc\u51fa\u73b0\u95ee\u9898\uff0c\u53ea\u80fd\u4e00\u6b65\u4e00\u6b65\u6253\u5370\u8017\u65f6<\/li>\n
                2. \u4e0d\u597d\u8c03\u4f18<\/li>\n
                3. \u4f18\u5316\u4ee3\u7801<\/li>\n
                4. \u4f18\u5316\u8bbe\u8ba1<\/li>\n
                5. \u4f18\u5316\u7b97\u6cd5<\/li>\n
                6. \u4f18\u5316\u53c2\u6570<\/li>\n
                7. \u4fdd\u5e95\u505a\u6cd5\uff1a\u9650\u6d41<\/li>\n<\/ol>\n

                  7.Linux\u547d\u4ee4\u7684\u4f7f\u7528<\/h3>\n

                  top\u5b9e\u65f6\u663e\u793a\u6b63\u5728\u6267\u884c\u8fdb\u7a0b\u7684 CPU \u4f7f\u7528\u7387\u3001\u5185\u5b58\u4f7f\u7528\u7387\u4ee5\u53ca\u7cfb\u7edf\u8d1f\u8f7d\u7b49\u4fe1\u606f
                  \nmpstat -P ALL \u67e5\u770b\u591a\u6838CPU\u5206\u6838\u6027\u80fd
                  \nvmstat \u662f\u4e00\u6b3e\u6307\u5b9a\u91c7\u6837\u5468\u671f\u548c\u6b21\u6570\u7684\u529f\u80fd\u6027\u76d1\u6d4b\u5de5\u5177\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5b83\u76d1\u63a7\u8fdb\u7a0b\u4e0a\u4e0b\u6587\u5207\u6362\u7684\u60c5\u51b5\u3002
                  \npidstat \u547d\u4ee4\u53ef\u4ee5\u76d1\u6d4b\u5230\u5177\u4f53\u7ebf\u7a0b\u7684\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u76d1\u6d4b\u7ebf\u7a0b\u7684\u6027\u80fd\u3002<\/p>\n

                  8.\u4f18\u5316\u7684\u65b9\u5411<\/h3>\n

                  8.1 Java\u7f16\u7a0b<\/h4>\n
                    \n
                  1. \u4ece\u7ebf\u7a0b\u5b89\u5168\uff0c\u6570\u636e\u53d8\u66f4\u7684\u89d2\u5ea6\u53bb\u9009\u62e9String\uff0cStringBuffer\uff0cStringBuilder\uff0c\u91cd\u590d\u6027\u6570\u636e\u53ef\u4f7f\u7528String.intern \u8282\u7701\u5185\u5b58\u7a7a\u95f4\uff0c\u614e\u7528Split()\uff0c\u9632\u6b62\u6b63\u5219\u8868\u8fbe\u5f0f\u5e26\u6765\u7684\u56de\u6eaf\u95ee\u9898\u3002<\/li>\n
                  2. \u5904\u7406\u5927\u6570\u636e\u7684\u96c6\u5408\u65f6\uff0c\u5c3d\u91cf\u4f7f\u7528 Stream \u7684\u8fed\u4ee3\u65b9\u5f0f\u8fdb\u884c\u5904\u7406\u3002<\/li>\n
                  3. \u4f7f\u7528 HashMap \u65f6\uff0c\u53ef\u4ee5\u7ed3\u5408\u81ea\u5df1\u7684\u573a\u666f\u6765\u8bbe\u7f6e\u521d\u59cb\u5bb9\u91cf\u548c\u52a0\u8f7d\u56e0\u5b50\u4e24\u4e2a\u53c2\u6570<\/li>\n
                  4. try-catch \u4ee3\u7801\u6bb5\u4f1a\u4ea7\u751f\u989d\u5916\u7684\u6027\u80fd\u5f00\u9500\uff0c\u4f1a\u5f71\u54cd JVM \u5bf9\u4ee3\u7801\u8fdb\u884c\u4f18\u5316\uff0c\u5efa\u8bae\u4ec5\u6355\u83b7\u6709\u5fc5\u8981\u7684\u4ee3\u7801\u6bb5<\/li>\n
                  5. Java \u6bcf\u5b9e\u4f8b\u5316\u4e00\u4e2a Exception\uff0c\u90fd\u4f1a\u5bf9\u5f53\u65f6\u7684\u6808\u8fdb\u884c\u5feb\u7167\uff0c\u8fd9\u662f\u4e00\u4e2a\u76f8\u5bf9\u6bd4\u8f83\u91cd\u7684\u64cd\u4f5c\uff0c\u5c3d\u91cf\u76f4\u63a5\u629b\u51fa\u5f02\u5e38<\/li>\n<\/ol>\n

                    8.2 \u591a\u7ebf\u7a0b\u6027\u80fd\u8c03\u4f18<\/h4>\n
                      \n
                    1. \u51cf\u5c11\u9501\u7684\u6301\u6709\u65f6\u95f4<\/li>\n
                    2. \u964d\u4f4e\u9501\u7684\u7c92\u5ea6\uff08\u8bfb\u5199\u9501\u5206\u79bb\uff0c\u7f29\u5c0f\u9501\u4f4f\u7684\u4ee3\u7801\u6bb5\uff09<\/li>\n
                    3. volatile\u5173\u952e\u5b57\u53ef\u4ee5\u4fdd\u969c\u53ef\u89c1\u6027\u53ca\u6709\u5e8f\u6027\uff0c\u4e0d\u4f1a\u5bfc\u81f4\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u5f00\u9500\u6bd4\u8f83\u5c0f\u3002<\/li>\n
                    4. \u5408\u7406\u5730\u8bbe\u7f6e\u7ebf\u7a0b\u6c60\u5927\u5c0f\uff0c\u907f\u514d\u521b\u5efa\u8fc7\u591a\u7ebf\u7a0b<\/li>\n
                    5. \u51cf\u5c11 Java \u865a\u62df\u673a\u7684\u5783\u573e\u56de\u6536<\/li>\n
                    6. \u5e76\u53d1\u5bb9\u5668\u7684\u4f7f\u7528\uff0c\u5982Hashtable\u548cConcurrentHashMap\uff0cArrayList\u548cCopyOnWriteArrayList<\/li>\n<\/ol>\n

                      8.3 JVM\u6027\u80fd\u76d1\u6d4b\u53ca\u8c03\u4f18<\/h4>\n

                      GC \u8c03\u4f18\u7b56\u7565<\/p>\n

                        \n
                      1. \u8c03\u6574\u5806\u5185\u5b58\u964d\u4f4e Full GC \u7684\u9891\u7387<\/li>\n
                      2. \u8c03\u6574\u5e74\u8f7b\u4ee3\u964d\u4f4e Minor GC \u9891\u7387<\/li>\n
                      3. \u9009\u62e9\u5408\u9002\u7684 GC \u56de\u6536\u5668<\/li>\n<\/ol>\n

                        JVM\u547d\u4ee4
                        \njstack \u547d\u4ee4\u67e5\u770b\u7ebf\u7a0b\u5806\u6808\u7684\u8fd0\u884c\u60c5\u51b5\uff0c\u5bfc\u51fa Java \u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u7ebf\u7a0b\u5806\u6808\u4fe1\u606f\uff0c\u6392\u67e5\u4e00\u4e9b\u6b7b\u9501\u7684\u5f02\u5e38\u3002
                        \njstat \u53ef\u4ee5\u76d1\u6d4b Java \u5e94\u7528\u7a0b\u5e8f\u7684\u5b9e\u65f6\u8fd0\u884c\u60c5\u51b5\uff0c\u5305\u62ec\u5806\u5185\u5b58\u4fe1\u606f\u4ee5\u53ca\u5783\u573e\u56de\u6536\u4fe1\u606f\u3002
                        \njmap \u67e5\u770b\u5806\u5185\u5b58\u521d\u59cb\u5316\u914d\u7f6e\u4fe1\u606f\u4ee5\u53ca\u5806\u5185\u5b58\u7684\u4f7f\u7528\u60c5\u51b5\uff0c\u8f93\u51fa\u5806\u5185\u5b58\u4e2d\u7684\u5bf9\u8c61\u4fe1\u606f\uff0c\u5305\u62ec\u4ea7\u751f\u4e86\u54ea\u4e9b\u5bf9\u8c61\uff0c\u5bf9\u8c61\u6570\u91cf\u591a\u5c11\u7b49\u3002<\/p>\n

                        8.4 \u8bbe\u8ba1\u6a21\u5f0f\u8c03\u4f18<\/h4>\n

                        8.5 \u6570\u636e\u5e93\u6027\u80fd\u8c03\u4f18\uff08\u53ea\u4ee5Redis\u4e3a\u4f8b\uff0c\u7f3a\u5931\u4e86\u4f20\u7edf\u6570\u636e\u5e93\u7684\u5206\u6790\uff09<\/h4>\n

                        9.Java\u547d\u4ee4\u7684\u53c2\u6570<\/h3>\n

                        \"20200622105620377\"<\/p>\n","protected":false},"excerpt":{"rendered":"

                        Java\u6027\u80fd\u8c03\u4f18\u5206\u4eab \u8fd9\u6b21\u5206\u4eab\u8fd8\u662f\u4e4b\u524d\u5728\u516c\u53f8\u5bf9\u9879\u76ee\u8fdb\u884c\u6027\u80fd\u8c03\u4f18\u65f6\uff0c\u524d\u671f\u7684\u8c03\u7814\uff0c\u4ee5\u53ca\u79ef\u7d2f\u7684\u4e00\u4e9b\u7ecf\u9a8c\uff0c\u4e4b\u524d\u516c\u53f8\u4ea7\u54c1\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31],"tags":[],"class_list":["post-1132","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1132","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/comments?post=1132"}],"version-history":[{"count":1,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1132\/revisions"}],"predecessor-version":[{"id":1354,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/posts\/1132\/revisions\/1354"}],"wp:attachment":[{"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/media?parent=1132"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/categories?post=1132"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/rain1024.com\/index.php\/wp-json\/wp\/v2\/tags?post=1132"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}