{"id":27151,"date":"2025-11-13T16:05:00","date_gmt":"2025-11-13T08:05:00","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/java-application-troubleshooting-guide\/"},"modified":"2025-11-13T16:16:24","modified_gmt":"2025-11-13T08:16:24","slug":"java-application-troubleshooting-guide","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/java-application-troubleshooting-guide\/","title":{"rendered":"Java\u5e94\u7528\u6545\u969c\u8bca\u65ad\u6307\u5357"},"content":{"rendered":"\n<p>\u5bf9\u4e8e\u5728<a href=\"https:\/\/www.varidata.com\/zh-cn\/server\/los-angeles\/\" target=\"_blank\">\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528<\/a>\u6216\u6258\u7ba1\u73af\u5883\u4e2d\u8fd0\u884c<a href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/optimizing-mysql-connection-pooling-for-java-applications\/\" target=\"_blank\">Java\u5e94\u7528<\/a>\u7684\u5f00\u53d1\u4eba\u5458\u548c\u8fd0\u7ef4\u5de5\u7a0b\u5e08\u800c\u8a00\uff0c\u6545\u969c\u8bca\u65ad\u9700\u8981\u7ed3\u5408Java\u6838\u5fc3\u4e13\u4e1a\u77e5\u8bc6\u4e0e\u5bf9\u7f8e\u56fd\u57fa\u7840\u8bbe\u65bd\u7279\u6027\u7684\u7406\u89e3\u3002\u8de8\u533a\u57df\u670d\u52a1\u5668\u4e0a\u7684Java\u5e94\u7528\u6545\u969c\u8bca\u65ad\u5f80\u5f80\u9762\u4e34\u72ec\u7279\u6311\u6218\u2014\u2014\u4ece\u5168\u7403\u7528\u6237\u4e0e\u7f8e\u56fd\u6570\u636e\u4e2d\u5fc3\u4e4b\u95f4\u7684\u7f51\u7edc\u5ef6\u8fdf\uff0c\u5230\u4e0e\u79df\u7528\u786c\u4ef6\u89c4\u683c\u76f8\u5173\u7684\u8d44\u6e90\u9650\u5236\u3002\u5ffd\u89c6\u8fd9\u4e9b\u7279\u6027\u53ef\u80fd\u5bfc\u81f4\u505c\u673a\u65f6\u95f4\u5ef6\u957f\u3001\u7528\u6237\u4f53\u9a8c\u4e0b\u964d\uff0c\u6216\u6839\u6e90\u95ee\u9898\u88ab\u8bef\u5224\u800c\u53cd\u590d\u51fa\u73b0\u3002\u672c\u6307\u5357\u6452\u5f03\u6cdb\u6cdb\u800c\u8c08\u7684\u5efa\u8bae\uff0c\u63d0\u4f9b\u9488\u5bf9\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u548c\u6258\u7ba1\u73af\u5883\u7684\u53ef\u64cd\u4f5c\u3001\u6781\u5ba2\u53cb\u597d\u578b\u7b56\u7565\uff0c\u52a9\u4f60\u9ad8\u6548\u89e3\u51b3\u95ee\u9898\uff0c\u65e0\u9700\u7b5b\u9009\u65e0\u5173\u7684\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n<h2><strong>1. \u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\/\u6258\u7ba1\u4e0aJava\u5e94\u7528\u7684\u4e3b\u8981\u6545\u969c\u7c7b\u522b<\/strong><\/h2>\n<p>\u7f8e\u56fd\u57fa\u7840\u8bbe\u65bd\u4e0a\u7684Java\u5e94\u7528\u6545\u969c\u4e3b\u8981\u5206\u4e3a\u56db\u7c7b\uff0c\u6bcf\u7c7b\u90fd\u53d7\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\uff08\u5982\u8de8\u533a\u57df\u6d41\u91cf\u3001\u786c\u4ef6\u914d\u7f6e\uff09\u548c\u670d\u52a1\u5668\u6258\u7ba1\uff08\u5982\u5171\u4eab\u8d44\u6e90\u9650\u5236\u3001\u81ea\u5b9a\u4e49\u7f51\u7edc\u8bbe\u7f6e\uff09\u7684\u72ec\u7279\u7279\u6027\u5f71\u54cd\uff1a<\/p>\n<ul>\n<li><strong>\u8d44\u6e90\u74f6\u9888<\/strong>\uff1a\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u5e38\u9700\u5904\u7406\u5168\u7403\u6d41\u91cf\u5cf0\u503c\uff0c\u8fd9\u4f1a\u653e\u5927\u8d44\u6e90\u7ea6\u675f\u95ee\u9898\u3002\u5e38\u89c1\u95ee\u9898\u5305\u62ec\u5728\u7f8e\u6b27\u6d41\u91cf\u91cd\u53e0\u9ad8\u5cf0\u65f6\u6bb5\u52a0\u5267\u7684\u5185\u5b58\u6cc4\u6f0f\u3001\u4e0e\u79df\u7528\u670d\u52a1\u5668CPU\u6838\u5fc3\u6570\u4e0d\u5339\u914d\u7684JVM\u7ebf\u7a0b\u6c60\u8bbe\u7f6e\u5bfc\u81f4\u7684CPU\u8282\u6d41\uff0c\u4ee5\u53ca\u5728\u5b58\u50a8\u5206\u914d\u6709\u9650\u7684\u6258\u7ba1\u73af\u5883\u4e2d\uff0c\u672a\u8f6e\u8f6c\u7684\u65e5\u5fd7\u6216\u7f13\u5b58\u6570\u636e\u9020\u6210\u7684\u78c1\u76d8\u7a7a\u95f4\u8017\u5c3d\u3002<\/li>\n<li><strong>\u8de8\u533a\u57df\u7f51\u7edc\u95ee\u9898<\/strong>\uff1a\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u4ee5\u670d\u52a1\u5168\u7403\u7528\u6237\u4e3a\u4e3b\uff0c\u56e0\u6b64\u7f51\u7edc\u6545\u969c\u662f\u4e3b\u8981\u75db\u70b9\u3002\u5305\u62ec\u4e9a\u6d32\/\u6b27\u6d32\u7528\u6237\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u8fde\u63a5\u8d85\u65f6\u3001\u7279\u5b9a\u4e8e\u7f8e\u56fd\u6570\u636e\u4e2d\u5fc3\u653f\u7b56\u7684\u9632\u706b\u5899\u6216\u5b89\u5168\u7ec4\u62e6\u622a\uff0c\u4ee5\u53ca\u5168\u7403\u4f7f\u7528\u9ad8\u5cf0\u65f6\u6bb5\uff08\u5982\u7f8e\u56fd\u767d\u5929+\u4e9a\u6d32\u591c\u95f4\uff09\u7684\u5e26\u5bbd\u9971\u548c\u3002<\/li>\n<li><strong>\u73af\u5883\u4e0d\u5339\u914d<\/strong>\uff1a\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u4e2d\u7684Java\u5e94\u7528\u5e38\u56e0JVM\u53c2\u6570\u914d\u7f6e\u4e0e\u79df\u7528\u786c\u4ef6\u4e0d\u5339\u914d\u800c\u51fa\u73b0\u95ee\u9898\uff08\u5982\u5806\u5927\u5c0f\u8d85\u8fc7\u5171\u4eab\u670d\u52a1\u5668\u7684\u53ef\u7528\u5185\u5b58\uff09\u3002\u6258\u7ba1\u73af\u5883\u4e2d\uff0c\u82e5Java\u5e93\u4e0e\u670d\u52a1\u5668\u7684Linux\u53d1\u884c\u7248\u6216\u5185\u6838\u7248\u672c\u4e0d\u517c\u5bb9\uff0c\u53ef\u80fd\u5f15\u53d1\u4f9d\u8d56\u51b2\u7a81\uff1b\u800c\u8de8\u533a\u57df\u6570\u636e\u5e93\u8fde\u63a5\uff08\u5982\u7f8e\u56fd\u6258\u7ba1\u7684Java\u5e94\u7528\u94fe\u63a5\u5230\u6b27\u76df\u6570\u636e\u5e93\uff09\u5219\u4f1a\u56e0\u5ef6\u8fdf\u5bfc\u81f4\u8d85\u65f6\u3002<\/li>\n<li><strong>\u5e76\u53d1\u4e0e\u903b\u8f91\u6545\u969c<\/strong>\uff1a\u5168\u7403\u7528\u6237\u8bbf\u95ee\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u5e26\u6765\u7684\u9ad8\u5e76\u53d1\uff0c\u53ef\u80fd\u89e6\u53d1\u4ee3\u7801\u540c\u6b65\u4e0d\u4f73\u5bfc\u81f4\u7684\u7ebf\u7a0b\u6b7b\u9501\u6216\u6d3b\u9501\u3002\u4e1a\u52a1\u903b\u8f91\u6545\u969c\u53ef\u80fd\u8868\u73b0\u4e3a\u8de8\u533a\u57dfAPI\u8c03\u7528\uff08\u5982\u7f8e\u56fdJava\u5e94\u7528\u67e5\u8be2\u4e9a\u6d32\u7b2c\u4e09\u65b9\u670d\u52a1\uff09\u8d85\u8fc7\u5ef6\u8fdf\u9608\u503c\u65f6\u7684\u8d85\u65f6\uff0c\u6216\u5728\u7f8e\u56fd\u4e3b\u8282\u70b9\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\u7684\u6570\u636e\u4e0d\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<h2><strong>2. \u7f8e\u56fd\u57fa\u7840\u8bbe\u65bd\u4e0aJava\u5e94\u7528\u6545\u969c\u8bca\u65ad\u7684\u5fc5\u5907\u5de5\u5177<\/strong><\/h2>\n<p>\u6709\u6548\u7684\u6545\u969c\u8bca\u65ad\u9700\u8981\u80fd\u8854\u63a5Java\u4e13\u5c5e\u8bca\u65ad\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\/\u6258\u7ba1\u73af\u5883\u6d1e\u5bdf\u7684\u5de5\u5177\u3002\u4ee5\u4e0b\u662f\u6309\u8bca\u65ad\u5c42\u7ea7\u5206\u7c7b\u7684\u6781\u5ba2\u8ba4\u53ef\u5de5\u5177\uff0c\u91cd\u70b9\u5173\u6ce8\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\u8bbe\u7f6e\uff08\u5982\u57fa\u4e8eLinux\u7684\u79df\u7528\u670d\u52a1\u5668\u3001\u8fdc\u7a0b\u8bbf\u95ee\u9650\u5236\uff09\u7684\u517c\u5bb9\u6027\uff1a<\/p>\n<h3>\u7cfb\u7edf\u7ea7\u5de5\u5177\uff08\u7f8e\u56fdLinux\u670d\u52a1\u5668\uff09<\/h3>\n<ul>\n<li><code>top\/htop<\/code>\uff1a\u5b9e\u65f6\u76d1\u63a7CPU\u3001\u5185\u5b58\u548c\u8fdb\u7a0b\u5229\u7528\u7387\u2014\u2014\u5bf9\u4e8e\u8bc6\u522b\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u4e2d\u5171\u4eab\u8d44\u6e90\u7684\u7ade\u4e89\u70b9\u81f3\u5173\u91cd\u8981\u3002<\/li>\n<li><code>df\/du<\/code>\uff1a\u78c1\u76d8\u7a7a\u95f4\u5206\u6790\uff0c\u7528\u4e8e\u5b9a\u4f4d\u65e5\u5fd7\u6216\u7f13\u5b58\u81a8\u80c0\uff0c\u8fd9\u662f\u7f8e\u56fd\u6258\u7ba1\u670d\u52a1\u5668\u4e2d\u5e38\u89c1\u7684\u95ee\u9898\uff08\u5b58\u50a8\u6709\u9650\u6216\u6709\u4e25\u683c\u4fdd\u7559\u653f\u7b56\uff09\u3002<\/li>\n<li><code>netstat\/tcpdump<\/code>\uff1a\u7f51\u7edc\u8fde\u63a5\u8ddf\u8e2a\uff0c\u7528\u4e8e\u8bca\u65ad\u8de8\u533a\u57df\u5ef6\u8fdf\uff08\u5982\u8bc6\u522b\u7f8e\u56fd\u670d\u52a1\u5668\u4e0e\u5168\u7403\u5ba2\u6237\u7aef\u4e4b\u95f4\u7684\u4e22\u5305\uff09\u6216\u7f8e\u56fd\u6570\u636e\u4e2d\u5fc3\u9632\u706b\u5899\u7684\u7aef\u53e3\u62e6\u622a\u3002<\/li>\n<li><code>iostat<\/code>\uff1a\u78c1\u76d8I\/O\u76d1\u63a7\uff0c\u7528\u4e8e\u68c0\u6d4b\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u4e2d\u7684\u5b58\u50a8\u7f13\u6162\u95ee\u9898\uff0c\u8fd9\u53ef\u80fd\u6210\u4e3a\u4f9d\u8d56\u9891\u7e41\u6587\u4ef6\u64cd\u4f5c\u7684Java\u5e94\u7528\uff08\u5982\u6570\u636e\u5e93\u652f\u6301\u7684\u670d\u52a1\uff09\u7684\u74f6\u9888\u3002<\/li>\n<\/ul>\n<h3>Java\u4e13\u5c5e\u8bca\u65ad\u5de5\u5177<\/h3>\n<ul>\n<li><code>jps\/jstat<\/code>\uff1a\u8f7b\u91cf\u7ea7\u5de5\u5177\uff0c\u7528\u4e8e\u5217\u51fa\u8fd0\u884c\u4e2d\u7684Java\u8fdb\u7a0b\u548c\u76d1\u63a7JVM\u6307\u6807\uff08\u5982GC\u9891\u7387\u3001\u5806\u4f7f\u7528\u60c5\u51b5\uff09\uff0c\u5f00\u9500\u6781\u5c0f\u2014\u2014\u9002\u7528\u4e8e\u6709\u8d44\u6e90\u9650\u5236\u7684\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u3002<\/li>\n<li><code>jmap\/jhat<\/code>\uff1a\u5806\u8f6c\u50a8\u751f\u6210\u4e0e\u5206\u6790\u5de5\u5177\uff0c\u7528\u4e8e\u8bc6\u522b\u5185\u5b58\u6cc4\u6f0f\uff0c\u8fd9\u662f\u7f8e\u56fd\u6258\u7ba1\u670d\u52a1\u5668\u4e0a\u957f\u671f\u8fd0\u884c\u7684Java\u5e94\u7528\u7684\u4e3b\u8981\u95ee\u9898\u3002<\/li>\n<li><code>jstack<\/code>\uff1a\u7ebf\u7a0b\u5806\u6808\u5206\u6790\u5de5\u5177\uff0c\u7528\u4e8e\u53d1\u73b0\u6b7b\u9501\u3001\u963b\u585e\u7ebf\u7a0b\u6216\u5f02\u5e38\u7684\u7ebf\u7a0b\u6c60\u2014\u2014\u5bf9\u4e8e\u5904\u7406\u5168\u7403\u6d41\u91cf\u7684\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u4e2d\u7684\u9ad8\u5e76\u53d1Java\u5e94\u7528\u5fc5\u4e0d\u53ef\u5c11\u3002<\/li>\n<li><code>jcmd<\/code>\uff1a\u591a\u529f\u80fdJVM\u8bca\u65ad\u5de5\u5177\uff0c\u53ef\u89e6\u53d1GC\u3001\u6355\u83b7\u7ebf\u7a0b\u8f6c\u50a8\u6216\u68c0\u67e5JVM\u53c2\u6570\u2014\u2014\u517c\u5bb9\u5927\u591a\u6570\u5141\u8bb8\u8fdc\u7a0b\u547d\u4ee4\u6267\u884c\u7684\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\u3002<\/li>\n<\/ul>\n<h3>\u805a\u7126\u7f8e\u56fd\u57fa\u7840\u8bbe\u65bd\u7684\u76d1\u63a7\u5de5\u5177<\/h3>\n<ul>\n<li>\u5f00\u6e90\u76d1\u63a7\u6808\uff08Prometheus + Grafana\uff09\uff1a\u53ef\u5b9a\u5236\u4eea\u8868\u677f\uff0c\u7528\u4e8e\u8ddf\u8e2aJava\u5e94\u7528\u6307\u6807\uff08\u5982\u54cd\u5e94\u65f6\u95f4\u3001\u9519\u8bef\u7387\uff09\u548c\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u6307\u6807\uff08\u5982\u5e26\u5bbd\u4f7f\u7528\u3001\u670d\u52a1\u5668 uptime\uff09\u3002<\/li>\n<li>\u65e5\u5fd7\u805a\u5408\u5de5\u5177\uff08ELK\/OpenSearch\uff09\uff1a\u7f8e\u56fd\u6258\u7ba1\u73af\u5883\u4e2dJava\u5e94\u7528\u7684\u96c6\u4e2d\u5f0f\u65e5\u5fd7\uff0c\u652f\u6301\u5c06\u5e94\u7528\u9519\u8bef\u4e0e\u670d\u52a1\u5668\u7ea7\u4e8b\u4ef6\uff08\u5982\u9632\u706b\u5899\u62e6\u622a\u3001\u8d44\u6e90\u8282\u6d41\uff09\u5173\u8054\u5206\u6790\u3002<\/li>\n<li>\u7f51\u7edc\u5ef6\u8fdf\u5de5\u5177\uff08mtr\u3001traceroute\uff09\uff1a\u8de8\u533a\u57df\u8def\u5f84\u5206\u6790\uff0c\u7528\u4e8e\u6d4b\u91cf\u7f8e\u56fd\u670d\u52a1\u5668\u4e0e\u5168\u7403\u5ba2\u6237\u7aef\u4e4b\u95f4\u7684\u5ef6\u8fdf\uff0c\u8bc6\u522b\u4f20\u8f93\u7f51\u7edc\u4e2d\u7684\u74f6\u9888\u3002<\/li>\n<\/ul>\n<h2><strong>3. \u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\/\u6258\u7ba1\u7684\u5206\u6b65\u6545\u969c\u8bca\u65ad\u6d41\u7a0b<\/strong><\/h2>\n<p>\u7f8e\u56fd\u57fa\u7840\u8bbe\u65bd\u4e0a\u7684Java\u5e94\u7528\u6545\u969c\u8bca\u65ad\u9700\u8981\u7ed3\u6784\u5316\u65b9\u6cd5\uff1a\u5148\u4f18\u5148\u68c0\u67e5\u73af\u5883\u7279\u5b9a\u9879\uff0c\u518d\u6df1\u5165Java\u7ea7\u8bca\u65ad\u3002\u9075\u5faa\u4ee5\u4e0b\u6781\u5ba2\u53cb\u597d\u578b\u6d41\u7a0b\uff0c\u53ef\u6700\u5927\u9650\u5ea6\u51cf\u5c11\u505c\u673a\u65f6\u95f4\u5e76\u907f\u514d\u8bef\u5224\uff1a<\/p>\n<ol>\n<li><strong>\u521d\u59cb\u73af\u5883\u9a8c\u8bc1<\/strong>\n<ul>\n<li>\u9a8c\u8bc1\u670d\u52a1\u5668\u53ef\u8fbe\u6027\uff1a\u4f7f\u7528<code>ping<\/code>\u548cSSH\u786e\u8ba4\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\/\u6258\u7ba1\u670d\u52a1\u5668\u53ef\u8bbf\u95ee\u2014\u2014\u6392\u9664\u57fa\u7840\u7f51\u7edc\u4e2d\u65ad\u6216\u6570\u636e\u4e2d\u5fc3\u95ee\u9898\u3002<\/li>\n<li>\u68c0\u67e5\u6838\u5fc3\u7cfb\u7edf\u8d44\u6e90\uff1a\u8fd0\u884c<code>top<\/code>\u3001<code>free -m<\/code>\u548c<code>df -h<\/code>\uff0c\u6392\u9664CPU\u3001\u5185\u5b58\u6216\u78c1\u76d8\u8017\u5c3d\u2014\u2014\u8fd9\u662f\u7f8e\u56fd\u5171\u4eab\u670d\u52a1\u5668\u79df\u7528\u7684\u5e38\u89c1\u5feb\u901f\u4fee\u590d\u70b9\u3002<\/li>\n<li>\u9a8c\u8bc1Java\u8fdb\u7a0b\u72b6\u6001\uff1a\u4f7f\u7528<code>jps<\/code>\u786e\u8ba4Java\u5e94\u7528\u6b63\u5728\u8fd0\u884c\uff0c\u4f7f\u7528<code>netstat -tulpn<\/code>\u68c0\u67e5\u5e94\u7528\u7aef\u53e3\u662f\u5426\u76d1\u542c\uff08\u6392\u9664\u7aef\u53e3\u51b2\u7a81\u6216\u8fdb\u7a0b\u5d29\u6e83\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6545\u969c\u5206\u7c7b<\/strong>\n<ul>\n<li>\u8d44\u6e90\u76f8\u5173\uff1a\u82e5CPU\/\u5185\u5b58\u98d9\u5347\uff0c\u4f7f\u7528<code>jstat<\/code>\u68c0\u67e5GC\u6d3b\u52a8\uff08\u9891\u7e41GC\u8868\u660e\u5806\u914d\u7f6e\u4e0d\u5f53\uff09\uff0c\u6216\u4f7f\u7528<code>jmap<\/code>\u6355\u83b7\u5806\u8f6c\u50a8\uff08\u7528\u4e8e\u6cc4\u6f0f\u5206\u6790\uff09\u3002<\/li>\n<li>\u7f51\u7edc\u76f8\u5173\uff1a\u82e5\u7528\u6237\u62a5\u544a\u8d85\u65f6\uff0c\u4ece\u7f8e\u56fd\u670d\u52a1\u5668\u8fd0\u884c<code>traceroute<\/code>\u5230\u7528\u6237\u6240\u5728\u533a\u57df\uff08\u5982\u4e9a\u6d32\uff09\u4ee5\u8bc6\u522b\u5ef6\u8fdf\u5cf0\u503c\uff0c\u5e76\u9a8c\u8bc1\u9632\u706b\u5899\u89c4\u5219\u662f\u5426\u5141\u8bb8\u5e94\u7528\u7aef\u53e3\u7684\u5165\u7ad9\/\u51fa\u7ad9\u6d41\u91cf\u3002<\/li>\n<li>\u914d\u7f6e\u76f8\u5173\uff1a\u5c06JVM\u53c2\u6570\uff08\u5982<code>-Xms<\/code>\u3001<code>-Xmx<\/code>\uff09\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u786c\u4ef6\u89c4\u683c\uff08\u5982\u53ef\u7528\u5185\u5b58\uff09\u5bf9\u6bd4\uff0c\u4f7f\u7528<code>ldd<\/code>\uff08\u9488\u5bf9\u539f\u751f\u5e93\uff09\u6216\u5e94\u7528\u65e5\u5fd7\u68c0\u67e5\u4f9d\u8d56\u51b2\u7a81\u3002<\/li>\n<li>\u4ee3\u7801\u76f8\u5173\uff1a\u82e5\u65e5\u5fd7\u8bb0\u5f55\u9519\u8bef\uff0c\u4f7f\u7528<code>jstack<\/code>\u68c0\u67e5\u6b7b\u9501\uff0c\u67e5\u770b\u5806\u6808\u8ddf\u8e2a\u4e2d\u7684\u903b\u8f91\u7f3a\u9677\u2014\u2014\u7279\u522b\u5173\u6ce8\u53ef\u80fd\u8d85\u8fc7\u8d85\u65f6\u9608\u503c\u7684\u8de8\u533a\u57dfAPI\u8c03\u7528\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u6839\u6e90\u9a8c\u8bc1<\/strong>\n<ul>\n<li>\u590d\u73b0\u95ee\u9898\uff1a\u6a21\u62df\u5168\u7403\u6d41\u91cf\u6a21\u5f0f\uff08\u5982\u4f7f\u7528<code>ab<\/code>\u6216JMeter\uff09\u5bf9\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u8fdb\u884c\u6d4b\u8bd5\uff0c\u5728\u53d7\u63a7\u73af\u5883\u4e2d\u91cd\u73b0\u6545\u969c\u3002<\/li>\n<li>\u5173\u8054\u6307\u6807\uff1a\u5c06Java\u5e94\u7528\u65e5\u5fd7\u4e0e\u7f8e\u56fd\u670d\u52a1\u5668\u6307\u6807\uff08\u5982\u6545\u969c\u65f6\u6bb5\u7684\u5e26\u5bbd\u4f7f\u7528\uff09\u4ea4\u53c9\u5f15\u7528\uff0c\u786e\u8ba4\u56e0\u679c\u5173\u7cfb\uff08\u5982\u5e26\u5bbd\u9971\u548c\u89e6\u53d1\u8d85\u65f6\uff09\u3002<\/li>\n<li>\u6d4b\u8bd5\u5047\u8bbe\uff1a\u4f8b\u5982\uff0c\u82e5\u6000\u7591\u5806\u5927\u5c0f\u95ee\u9898\uff0c\u53ef\u4e34\u65f6\u8c03\u6574\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u7684JVM\u53c2\u6570\uff08\u5e76\u5236\u5b9a\u56de\u6eda\u8ba1\u5212\uff09\uff0c\u76d1\u63a7\u6539\u8fdb\u60c5\u51b5\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u89e3\u51b3\u4e0e\u9a8c\u8bc1<\/strong>\n<ul>\n<li>\u5e94\u7528\u9488\u5bf9\u6027\u4fee\u590d\uff1a\u8c03\u6574JVM\u53c2\u6570\u4ee5\u5339\u914d\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u786c\u4ef6\uff0c\u66f4\u65b0\u9632\u706b\u5899\u89c4\u5219\u4ee5\u652f\u6301\u8de8\u533a\u57df\u8bbf\u95ee\uff0c\u6216\u4fee\u8865\u4ee3\u7801\u4ee5\u89e3\u51b3\u5e76\u53d1\u95ee\u9898\u3002<\/li>\n<li>\u4fee\u590d\u540e\u76d1\u63a7\uff1a\u4f7f\u7528Prometheus\/Grafana\u8ddf\u8e2a\u5173\u952e\u6307\u6807\uff08\u5982\u54cd\u5e94\u65f6\u95f4\u3001\u9519\u8bef\u7387\uff0924-48\u5c0f\u65f6\uff0c\u786e\u4fdd\u4fee\u590d\u5728\u5168\u7403\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u9ad8\u5cf0\u4f7f\u7528\u671f\u95f4\u6709\u6548\u3002<\/li>\n<li>\u8bb0\u5f55\u73af\u5883\u7279\u5b9a\u6d1e\u5bdf\uff1a\u8bb0\u5f55\u5f71\u54cd\u89e3\u51b3\u65b9\u6848\u7684\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\/\u6258\u7ba1\u7279\u6027\uff08\u5982\u5e26\u5bbd\u9650\u5236\u3001Linux\u53d1\u884c\u7248\uff09\uff0c\u4e3a\u672a\u6765\u8bca\u65ad\u63d0\u4f9b\u53c2\u8003\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h2><strong>4. \u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u7279\u5b9a\u6545\u969c\u573a\u666f\u4e0e\u6781\u5ba2\u89e3\u51b3\u65b9\u6848<\/strong><\/h2>\n<p>\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\/\u6258\u7ba1\u4e0a\u7684Java\u5e94\u7528\u9762\u4e34\u4e0e\u8de8\u533a\u57df\u6d41\u91cf\u3001\u786c\u4ef6\u9650\u5236\u548c\u6570\u636e\u4e2d\u5fc3\u653f\u7b56\u76f8\u5173\u7684\u72ec\u7279\u6545\u969c\u6a21\u5f0f\u3002\u4ee5\u4e0b\u662f\u771f\u5b9e\u573a\u666f\u53ca\u53ef\u64cd\u4f5c\u7684\u6280\u672f\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n<h3>\u573a\u666f1\uff1a\u7f8e\u56fd\u5171\u4eab\u670d\u52a1\u5668\u79df\u7528\u4e2d\u5185\u5b58\u6cc4\u6f0f\u5bfc\u81f4OOM<\/h3>\n<p><strong>\u75c7\u72b6<\/strong>\uff1a\u7f8e\u6b27\u6d41\u91cf\u91cd\u53e0\u9ad8\u5cf0\u671f\u95f4\uff0cJava\u5e94\u7528\u56e0<code>OutOfMemoryError<\/code>\u5d29\u6e83\uff1b<code>free -m<\/code>\u663e\u793a\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u7684\u5185\u5b58\u8017\u5c3d\u3002<\/p>\n<p><strong>\u8bca\u65ad<\/strong>\uff1a\u4f7f\u7528<code>jmap -dump:format=b,file=heap.bin &lt;pid&gt;<\/code>\u4ece\u7f8e\u56fd\u670d\u52a1\u5668\u6355\u83b7\u5806\u8f6c\u50a8\u3002\u901a\u8fc7MAT\uff08\u5185\u5b58\u5206\u6790\u5de5\u5177\uff09\u5206\u6790\uff0c\u8bc6\u522b\u4fdd\u7559\u5bf9\u8c61\uff08\u5982\u672a\u5173\u95ed\u7684\u6570\u636e\u5e93\u8fde\u63a5\u3001\u672a\u9a71\u9010\u7684\u7f13\u5b58\u6570\u636e\uff09\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6848<\/strong>\uff1a<\/p>\n<ul>\n<li>\u4f18\u5316JVM\u5806\u53c2\u6570\uff1a\u5c06<code>-Xmx<\/code>\u8bbe\u7f6e\u4e3a\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u53ef\u7528\u5185\u5b58\u768470%\uff08\u907f\u514d\u4e0e\u5176\u4ed6\u5171\u4eab\u5e94\u7528\u7ade\u4e89\uff09\uff0c\u542f\u7528<code>-XX:+HeapDumpOnOutOfMemoryError<\/code>\u4ee5\u4fbf\u672a\u6765\u5feb\u901f\u8bca\u65ad\u3002<\/li>\n<li>\u4fee\u590d\u6cc4\u6f0f\u4ee3\u7801\uff1a\u5b9e\u73b0\u5e26\u9002\u5f53\u8d85\u65f6\u8bbe\u7f6e\u7684\u8fde\u63a5\u6c60\uff08\u5982HikariCP\u7684maxIdleTime\uff09\uff0c\u4e3a\u7f13\u5b58\u6dfb\u52a0\u9a71\u9010\u7b56\u7565\uff08\u5982\u5e26\u6700\u5927\u5927\u5c0f\u9650\u5236\u7684Caffeine\u7f13\u5b58\uff09\u3002<\/li>\n<li>\u5b9a\u671f\u5806\u68c0\u67e5\uff1a\u5728US\u670d\u52a1\u5668\u79df\u7528\u7684 cron \u4efb\u52a1\u4e2d\u4f7f\u7528<code>jstat -gcutil &lt;pid&gt; 1000 10<\/code>\uff0c\u5728OOM\u53d1\u751f\u524d\u9884\u8b66\u5f02\u5e38GC\u6d3b\u52a8\u3002<\/li>\n<\/ul>\n<h3>\u573a\u666f2\uff1a\u7f8e\u56fd\u6258\u7ba1Java\u5e94\u7528\u7684\u8de8\u533a\u57df\u8fde\u63a5\u8d85\u65f6<\/h3>\n<p><strong>\u75c7\u72b6<\/strong>\uff1a\u4e9a\u6d32\u7528\u6237\u8bbf\u95ee\u7f8e\u56fd\u6258\u7ba1\u7684Java\u5e94\u7528\u65f6\u62a5\u544a\u8d85\u65f6\uff1b<code>tcpdump<\/code>\u663e\u793a\u7f8e\u56fd\u670d\u52a1\u5668\u4e0e\u4e9a\u6d32\u5ba2\u6237\u7aef\u4e4b\u95f4\u7684ACK\u5ef6\u8fdf\u3002<\/p>\n<p><strong>\u8bca\u65ad<\/strong>\uff1a\u4ece\u7f8e\u56fd\u6258\u7ba1\u670d\u52a1\u5668\u8fd0\u884c<code>mtr --report &lt;\u4e9a\u6d32\u5ba2\u6237\u7aefIP&gt;<\/code>\uff0c\u8bc6\u522b\u4f20\u8f93\u4e2d\u7684\u9ad8\u5ef6\u8fdf\u8282\u70b9\u3002\u68c0\u67e5\u5e94\u7528\u65e5\u5fd7\u4e2d\u4e0e\u7f8e\u56fd\u5230\u4e9a\u6d32\u7684\u6570\u636e\u5e93\u6216API\u8c03\u7528\u76f8\u5173\u7684<code>SocketTimeoutException<\/code>\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6848<\/strong>\uff1a<\/p>\n<ul>\n<li>\u4f18\u5316\u7f51\u7edc\u8bbe\u7f6e\uff1a\u5728\u7f8e\u56fd\u670d\u52a1\u5668\u542f\u7528TCP\u4fdd\u6d3b\uff08<code>sysctl -w net.ipv4.tcp_keepalive_time=600<\/code>\uff09\uff0c\u589e\u52a0Java\u5e94\u7528\u4e2d\u7684\u5957\u63a5\u5b57\u8d85\u65f6\u53c2\u6570\uff08\u5982HTTP\u5ba2\u6237\u7aef\u7684<code>setConnectTimeout(5000)<\/code>\uff09\u3002<\/li>\n<li>\u51cf\u5c11\u8de8\u533a\u57df\u4f9d\u8d56\uff1a\u5728\u7f8e\u56fd\u6258\u7ba1\u670d\u52a1\u5668\u4e0a\u7f13\u5b58\u9891\u7e41\u8bbf\u95ee\u7684\u6570\u636e\uff08\u5982Redis\uff09\uff0c\u51cf\u5c11\u5bf9\u4e9a\u6d32\u670d\u52a1\u7684\u8c03\u7528\u3002<\/li>\n<li>\u8c03\u6574\u7f8e\u56fd\u6570\u636e\u4e2d\u5fc3\u5b89\u5168\u89c4\u5219\uff1a\u786e\u4fdd\u9632\u706b\u5899\/\u5b89\u5168\u7ec4\u5141\u8bb8\u6765\u81ea\u7528\u6237\u533a\u57df\u7684\u5165\u7ad9\u6d41\u91cf\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6570\u636e\u5305\u68c0\u67e5\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>\u573a\u666f3\uff1a\u56e0JVM-OS\u4e0d\u5339\u914d\u5bfc\u81f4\u7f8e\u56fdVPS\u7684CPU\u98d9\u5347<\/h3>\n<p><strong>\u75c7\u72b6<\/strong>\uff1a\u7f8e\u56fdVPS\u4e0a\u7684Java\u5e94\u7528CPU\u4f7f\u7528\u7387\u6301\u7eed90%\u4ee5\u4e0a\uff1b<code>top<\/code>\u663e\u793aJava\u8fdb\u7a0b\u662f\u7f6a\u9b41\u7978\u9996\uff0c\u4f46\u5e94\u7528\u8d1f\u8f7d\u8f83\u4f4e\u3002<\/p>\n<p><strong>\u8bca\u65ad<\/strong>\uff1a\u68c0\u67e5JVM\u7ebf\u7a0b\u6c60\u8bbe\u7f6e\uff08\u5982Tomcat\u7684<code>maxThreads<\/code>\uff09\u4e0e\u7f8e\u56fdVPS\u7684CPU\u6838\u5fc3\u6570\uff08<code>lscpu<\/code>\uff09\u662f\u5426\u5339\u914d\u3002\u4f7f\u7528<code>jstack<\/code>\u67e5\u627e\u5904\u4e8e<code>RUNNABLE<\/code>\u72b6\u6001\u7684\u7ebf\u7a0b\u662f\u5426\u9677\u5165\u5faa\u73af\u6216\u4f4e\u6548\u8ba1\u7b97\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6848<\/strong>\uff1a<\/p>\n<ul>\n<li>\u4f7fJVM\u4e0e\u7f8e\u56fdVPS\u786c\u4ef6\u5bf9\u9f50\uff1a\u5c06<code>-XX:ParallelGCThreads<\/code>\u8bbe\u7f6e\u4e3a\u4e0eCPU\u6838\u5fc3\u6570\u5339\u914d\uff08\u59824\u6838\u7f8e\u56fdVPS\u8bbe\u7f6e<code>-XX:ParallelGCThreads=4<\/code>\uff09\uff0c\u8c03\u6574\u7ebf\u7a0b\u6c60\u5927\u5c0f\u4ee5\u907f\u514d\u8fc7\u5ea6\u8ba2\u9605\u3002<\/li>\n<li>\u4f18\u5316GC\u6536\u96c6\u5668\uff1a\u5207\u6362\u5230G1GC\uff08<code>-XX:+UseG1GC<\/code>\uff09\u4ee5\u63d0\u9ad8\u7f8e\u56fdVPS\u7684CPU\u6548\u7387\uff0c\u51cf\u5c11\u6d88\u8017CPU\u7684GC\u6682\u505c\u3002<\/li>\n<li>\u5206\u6790\u4f4e\u6548\u4ee3\u7801\uff1a\u4f7f\u7528<code>jprofiler<\/code>\uff08\u8fdc\u7a0b\u6a21\u5f0f\uff09\u8bc6\u522bCPU\u5bc6\u96c6\u578b\u65b9\u6cd5\uff0c\u4f18\u5316\u7b97\u6cd5\uff08\u5982\u7528\u6d41\u6216\u6279\u5904\u7406\u66ff\u6362\u5d4c\u5957\u5faa\u73af\uff09\u3002<\/li>\n<\/ul>\n<h2><strong>5. \u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\/\u6258\u7ba1\u4e0aJava\u5e94\u7528\u7684\u4e3b\u52a8\u9884\u9632\u63aa\u65bd<\/strong><\/h2>\n<p>\u6545\u969c\u8bca\u65ad\u81f3\u5173\u91cd\u8981\uff0c\u4f46\u9488\u5bf9\u7f8e\u56fd\u57fa\u7840\u8bbe\u65bd\u7684\u4e3b\u52a8\u63aa\u65bd\u53ef\u6d88\u9664\u5927\u591a\u6570\u5e38\u89c1\u6545\u969c\u3002\u4ee5\u4e0b\u662f\u6781\u5ba2\u8ba4\u53ef\u7684\u7b56\u7565\uff0c\u7528\u4e8e\u5f3a\u5316\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u548c\u6258\u7ba1\u73af\u5883\u4e2d\u7684Java\u5e94\u7528\uff1a<\/p>\n<ul>\n<li><strong>\u73af\u5883\u5bf9\u9f50\u914d\u7f6e<\/strong>\uff1a\u57fa\u4e8e\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u89c4\u683c\u81ea\u52a8\u8c03\u6574JVM\u53c2\u6570\uff08\u5982\u4f7f\u7528Ansible\u6839\u636e\u53ef\u7528\u5185\u5b58\u52a8\u6001\u8bbe\u7f6e<code>-Xmx<\/code>\uff09\u3002\u5728US\u670d\u52a1\u5668\u7684Linux\u53d1\u884c\u7248\uff08\u5982Ubuntu 22.04\u3001CentOS Stream\uff09\u4e0a\u6d4b\u8bd5Java\u4f9d\u8d56\uff0c\u907f\u514d\u517c\u5bb9\u6027\u5dee\u8ddd\u3002<\/li>\n<li><strong>\u8de8\u533a\u57df\u4f18\u5316<\/strong>\uff1a\u4e3a\u5168\u7403\u8bbf\u95ee\u8bbe\u8ba1Java\u5e94\u7528\uff0c\u5b9e\u73b0\u8de8\u533a\u57df\u8c03\u7528\u7684\u6307\u6570\u9000\u907f\u91cd\u8bd5\u903b\u8f91\uff0c\u4f7f\u7528CDN\u5c06\u9759\u6001\u8d44\u6e90\u7f13\u5b58\u5230\u79bb\u7528\u6237\u66f4\u8fd1\u7684\u4f4d\u7f6e\uff0c\u9009\u62e9\u5177\u6709\u4f4e\u5ef6\u8fdf\u4f20\u8f93\u7f51\u7edc\uff08\u5982\u4e00\u7ea7ISP\uff09\u7684\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u3002<\/li>\n<li><strong> robust\u76d1\u63a7\u4e0e\u544a\u8b66<\/strong>\uff1a\u90e8\u7f72Prometheus + Grafana\u8ddf\u8e2a\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u6307\u6807\uff08\u5e26\u5bbd\u3001CPU\uff09\u548cJava\u4e13\u5c5e\u6307\u6807\uff08GC\u5ef6\u8fdf\u3001\u7ebf\u7a0b\u6570\uff09\uff0c\u8bbe\u7f6e\u5f02\u5e38\u9608\u503c\u544a\u8b66\u3002\u5efa\u7acb\u65e5\u5fd7\u805a\u5408\u4ee5\u96c6\u4e2d\u7f8e\u56fd\u670d\u52a1\u5668\u548cJava\u5e94\u7528\u65e5\u5fd7\uff0c\u4fbf\u4e8e\u5feb\u901f\u5173\u8054\u5206\u6790\u3002<\/li>\n<li><strong>\u5408\u89c4\u4e0e\u5f39\u6027\u90e8\u7f72<\/strong>\uff1a\u9075\u5faa\u7f8e\u56fd\u6570\u636e\u4e2d\u5fc3\u7684\u6258\u7ba1\u6700\u4f73\u5b9e\u8df5\uff08\u5982\u5197\u4f59\u7535\u6e90\u3001\u7f51\u7edc\u6545\u969c\u8f6c\u79fb\uff09\uff0c\u5728Java\u5e94\u7528\u4e2d\u5b9e\u73b0\u7194\u65ad\u5668\uff08\u5982Resilience4j\uff09\uff0c\u9632\u6b62\u8de8\u533a\u57df\u670d\u52a1\u4e2d\u65ad\u5bfc\u81f4\u7684\u7ea7\u8054\u6545\u969c\u3002\u5b9a\u671f\u6d4b\u8bd5\u6545\u969c\u8f6c\u79fb\u573a\u666f\uff08\u5982\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u4e0a\u7684Java\u5e94\u7528\u91cd\u542f\uff09\uff0c\u786e\u4fdd\u5feb\u901f\u6062\u590d\u3002<\/li>\n<\/ul>\n<h2><strong>\u7ed3\u8bed\uff1a\u7cbe\u901a\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u4e0e\u6258\u7ba1\u7684Java\u6545\u969c\u8bca\u65ad<\/strong><\/h2>\n<p>\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u548c\u6258\u7ba1\u73af\u5883\u4e2d\u7684Java\u5e94\u7528\u6545\u969c\u8bca\u65ad\u9700\u8981\u6df1\u539a\u7684Java\u4e13\u4e1a\u77e5\u8bc6\u4e0e\u5bf9\u7f8e\u56fd\u57fa\u7840\u8bbe\u65bd\u7279\u6027\u7684\u7406\u89e3\u2014\u2014\u4ece\u8de8\u533a\u57df\u5ef6\u8fdf\u5230\u5171\u4eab\u8d44\u6e90\u9650\u5236\u3002\u901a\u8fc7\u6709\u6548\u5206\u7c7b\u6545\u969c\u3001\u5229\u7528\u5408\u9002\u7684\u7cfb\u7edf\u548cJava\u4e13\u5c5e\u5de5\u5177\u3001\u9075\u5faa\u7ed3\u6784\u5316\u6d41\u7a0b\uff0c\u8fd0\u7ef4\u5de5\u7a0b\u5e08\u548c\u5f00\u53d1\u4eba\u5458\u53ef\u5feb\u901f\u89e3\u51b3\u95ee\u9898\uff0c\u540c\u65f6\u6700\u5927\u9650\u5ea6\u51cf\u5c11\u505c\u673a\u65f6\u95f4\u3002\u73af\u5883\u5bf9\u9f50\u914d\u7f6e\u548c\u8de8\u533a\u57df\u4f18\u5316\u7b49\u4e3b\u52a8\u63aa\u65bd\u8fdb\u4e00\u6b65\u964d\u4f4e\u6545\u969c\u53ef\u80fd\u6027\uff0c\u786e\u4fddJava\u5e94\u7528\u5728\u57fa\u4e8e\u7f8e\u56fd\u7684\u670d\u52a1\u5668\u79df\u7528\u6216\u6258\u7ba1\u73af\u5883\u4e2d\u53ef\u9760\u8fd0\u884c\uff0c\u4e3a\u5168\u7403\u7528\u6237\u63d0\u4f9b\u9ad8\u6027\u80fd\u670d\u52a1\u3002\u65e0\u8bba\u4f60\u662f\u5728\u8c03\u8bd5\u5171\u4eab\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\uff0c\u8fd8\u662f\u89e3\u51b3\u6258\u7ba1\u73af\u5883\u4e2d\u7684\u8de8\u533a\u57df\u8d85\u65f6\uff0c\u672c\u6307\u5357\u90fd\u63d0\u4f9b\u4e86\u6781\u5ba2\u53cb\u597d\u7684\u89c1\u89e3\uff0c\u52a9\u4f60\u8bca\u65ad\u548c\u9884\u9632\u5e38\u89c1\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5bf9\u4e8e\u5728\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u6216\u6258\u7ba1\u73af\u5883\u4e2d\u8fd0\u884cJava\u5e94\u7528\u7684\u5f00\u53d1\u4eba\u5458\u548c\u8fd0\u7ef4\u5de5\u7a0b\u5e08\u800c\u8a00\uff0c\u6545\u969c\u8bca\u65ad\u9700\u8981\u7ed3\u5408Java\u6838\u5fc3\u4e13\u4e1a\u77e5\u8bc6\u4e0e\u5bf9\u7f8e\u56fd\u57fa\u7840\u8bbe\u65bd\u7279\u6027\u7684\u7406\u89e3\u3002\u8de8\u533a\u57df\u670d\u52a1\u5668\u4e0a\u7684Java\u5e94\u7528\u6545\u969c\u8bca\u65ad\u5f80\u5f80\u9762\u4e34\u72ec\u7279\u6311\u6218\u2014\u2014\u4ece\u5168\u7403\u7528\u6237\u4e0e\u7f8e\u56fd\u6570\u636e\u4e2d\u5fc3\u4e4b\u95f4\u7684\u7f51\u7edc\u5ef6\u8fdf\uff0c\u5230\u4e0e\u79df\u7528\u786c\u4ef6\u89c4\u683c\u76f8\u5173\u7684\u8d44\u6e90\u9650\u5236\u3002\u5ffd\u89c6\u8fd9\u4e9b\u7279\u6027\u53ef\u80fd\u5bfc\u81f4\u505c\u673a\u65f6\u95f4\u5ef6\u957f\u3001\u7528\u6237\u4f53\u9a8c\u4e0b\u964d\uff0c\u6216\u6839\u6e90\u95ee\u9898\u88ab\u8bef\u5224\u800c\u53cd\u590d\u51fa\u73b0\u3002\u672c\u6307\u5357\u6452\u5f03\u6cdb\u6cdb\u800c\u8c08\u7684\u5efa\u8bae\uff0c\u63d0\u4f9b\u9488\u5bf9\u7f8e\u56fd\u670d\u52a1\u5668\u79df\u7528\u548c\u6258\u7ba1\u73af\u5883\u7684\u53ef\u64cd\u4f5c\u3001\u6781\u5ba2\u53cb\u597d\u578b\u7b56\u7565\uff0c\u52a9\u4f60\u9ad8\u6548\u89e3\u51b3\u95ee\u9898\uff0c\u65e0\u9700\u7b5b\u9009\u65e0\u5173\u7684\u6700\u4f73\u5b9e\u8df5\u3002 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