{"id":10007074,"date":"2023-01-13T13:18:27","date_gmt":"2023-01-13T05:18:27","guid":{"rendered":"https:\/\/ityet.com\/?p=10007074"},"modified":"2023-01-13T13:18:27","modified_gmt":"2023-01-13T05:18:27","slug":"%e6%8e%92%e6%9f%a5%ef%bc%8b%e8%a7%a3%e5%86%b3-java-%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f%ef%bc%8c%e6%9c%80%e5%9f%ba%e6%9c%ac%e7%9a%84%e6%96%b9%e6%b3%95%ef%bc%8c%e4%bd%a0%e5%bf%85%e9%a1%bb%e5%ad%a6","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10007074","title":{"rendered":"\u6392\u67e5\uff0b\u89e3\u51b3 Java \u5185\u5b58\u6cc4\u6f0f\uff0c\u6700\u57fa\u672c\u7684\u65b9\u6cd5\uff0c\u4f60\u5fc5\u987b\u5b66\u4f1a\uff01"},"content":{"rendered":"<p>\u6765\u6e90\uff1azhenbianshu.github.io\/<\/p>\n<p>\u524d\u4e9b\u65e5\u5b50\u5c0f\u7ec4\u5185\u5b89\u6392\u503c\u73ed\uff0c\u8f6e\u6d41\u770b\u987e\u6211\u4eec\u7684\u670d\u52a1\uff0c\u4e3b\u8981\u505a\u4e00\u4e9b\u62a5\u8b66\u90ae\u4ef6\u5904\u7406\u3001Bug \u6392\u67e5\u3001\u8fd0\u8425 issue \u5904\u7406\u7684\u4e8b\u3002\u5de5\u4f5c\u65e5\u8fd8\u597d\uff0c\u65e0\u8bba\u5e72\u4ec0\u4e48\u90fd\u8981\u4e0a\u73ed\u7684\uff0c\u82e5\u662f\u8f6e\u5230\u5468\u672b\uff0c\u90a3\u8fd9\u4e00\u5929\u7b97\u662f\u6bc1\u4e86\u3002<\/p>\n<p>\u4e0d\u77e5\u9053\u662f\u516c\u53f8\u7f51\u7edc\u5e7f\u4e86\u5c31\u8fd9\u6837\u8fd8\u662f\u7f51\u7edc\u8fd0\u7ef4\u7ec4\u4e0d\u7ed9\u529b\uff0c\u7f51\u7edc\u603b\u6709\u95ee\u9898\uff0c\u4e0d\u662f\u8fd9\u8fb9\u4ea4\u6362\u673a\u8131\u7f51\u4e86\u5c31\u662f\u90a3\u8fb9\u8def\u7531\u5668\u574f\u4e86\uff0c\u8fd8\u5076\u53d1\u5730\u5404\u79cd\u8d85\u65f6\uff0c\u800c\u6211\u4eec\u7075\u654f\u5730\u670d\u52a1\u63a2\u6d4b\u670d\u52a1\u603b\u80fd\u51c6\u786e\u5730\u6293\u4f4f\u5076\u73b0\u7684\u5c0f\u95ee\u9898\uff0c\u7ed9\u7f8e\u597d\u7684\u5de5\u4f5c\u52a0\u70b9\u6599\u3002\u597d\u51e0\u6b21\u503c\u73ed\u7ec4\u7684\u5c0f\u4f19\u4f34\u4eec\u4e00\u8d77\u5410\u69fd\uff0c\u5546\u91cf\u7740\u600e\u4e48\u907f\u8fc7\u670d\u52a1\u4fdd\u6d3b\u673a\u5236\uff0c\u5077\u5077\u505c\u4e86\u63a2\u6d4b\u670d\u52a1\u800c\u4e0d\u8ba9\u4eba\u53d1\u73b0\uff08\u867d\u7136\u4e5f\u5e76\u4e0d\u6562\uff09\u3002<\/p>\n<p>\u524d\u4e9b\u5929\u6211\u5c31\u5728\u5468\u672b\u5904\u7406\u4e86\u4e00\u6b21\u63a2\u6d4b\u670d\u52a1\u7684\u9505\u3002<\/p>\n<h3>\u95ee\u9898<\/h3>\n<hr>\n<h4>\u7f51\u7edc\u95ee\u9898\uff1f<\/h4>\n<p>\u665a\u4e0a\u4e03\u70b9\u591a\u5f00\u59cb\uff0c\u6211\u5c31\u5f00\u59cb\u4e0d\u505c\u5730\u6536\u5230\u62a5\u8b66\u90ae\u4ef6\uff0c\u90ae\u4ef6\u663e\u793a\u63a2\u6d4b\u7684\u51e0\u4e2a\u63a5\u53e3\u6709\u8d85\u65f6\u60c5\u51b5\u3002\u591a\u6570\u6267\u884c\u6808\u90fd\u5728\uff1a<\/p>\n<pre><code>java.io.BufferedReader.readLine(BufferedReader.java:371)\njava.io.BufferedReader.readLine(BufferReader.java:389)\njava_io_BufferedReader$readLine.call(Unknown Source)\ncom.domain.detect.http.HttpClient.getResponse(HttpClient.groovy:122)\ncom.domain.detect.http.HttpClient.this$2$getResponse(HttpClient.groovy)<\/code><\/pre>\n<p>\u8fd9\u4e2a\u7ebf\u7a0b\u6808\u7684\u62a5\u9519\u6211\u89c1\u5f97\u591a\u4e86\uff0c\u6211\u4eec\u8bbe\u7f6e\u7684 HTTP DNS \u8d85\u65f6\u662f 1s\uff0c connect \u8d85\u65f6\u662f 2s\uff0c read \u8d85\u65f6\u662f 3s\uff0c\u8fd9\u79cd\u62a5\u9519\u90fd\u662f\u63a2\u6d4b\u670d\u52a1\u6b63\u5e38\u53d1\u9001\u4e86 HTTP \u8bf7\u6c42\uff0c\u670d\u52a1\u5668\u4e5f\u5728\u6536\u5230\u8bf7\u6c42\u6b63\u5e38\u5904\u7406\u540e\u6b63\u5e38\u54cd\u5e94\u4e86\uff0c\u4f46\u6570\u636e\u5305\u5728\u7f51\u7edc\u5c42\u5c42\u8f6c\u53d1\u4e2d\u4e22\u5931\u4e86\uff0c\u6240\u4ee5\u8bf7\u6c42\u7ebf\u7a0b\u7684\u6267\u884c\u6808\u4f1a\u505c\u7559\u5728\u83b7\u53d6\u63a5\u53e3\u54cd\u5e94\u7684\u5730\u65b9\u3002\u8fd9\u79cd\u60c5\u51b5\u7684\u5178\u578b\u7279\u5f81\u5c31\u662f\u80fd\u5728\u670d\u52a1\u5668\u4e0a\u67e5\u627e\u5230\u5bf9\u5e94\u7684\u65e5\u5fd7\u8bb0\u5f55\u3002\u800c\u4e14\u65e5\u5fd7\u4f1a\u663e\u793a\u670d\u52a1\u5668\u54cd\u5e94\u5b8c\u5168\u6b63\u5e38\u3002\u4e0e\u5b83\u76f8\u5bf9\u7684\u8fd8\u6709\u7ebf\u7a0b\u6808\u505c\u7559\u5728 Socket connect \u5904\u7684\uff0c\u8fd9\u662f\u5728\u5efa\u8fde\u65f6\u5c31\u5931\u8d25\u4e86\uff0c\u670d\u52a1\u7aef\u5b8c\u5168\u65e0\u611f\u77e5\u3002<\/p>\n<p>\u6211\u6ce8\u610f\u5230\u5176\u4e2d\u4e00\u4e2a\u63a5\u53e3\u62a5\u9519\u66f4\u9891\u7e41\u4e00\u4e9b\uff0c\u8fd9\u4e2a\u63a5\u53e3\u9700\u8981\u4e0a\u4f20\u4e00\u4e2a 4M \u7684\u6587\u4ef6\u5230\u670d\u52a1\u5668\uff0c\u7136\u540e\u7ecf\u8fc7\u4e00\u8fde\u4e32\u7684\u4e1a\u52a1\u903b\u8f91\u5904\u7406\uff0c\u518d\u8fd4\u56de 2M \u7684\u6587\u672c\u6570\u636e\uff0c\u800c\u5176\u4ed6\u7684\u63a5\u53e3\u5219\u662f\u7b80\u5355\u7684\u4e1a\u52a1\u903b\u8f91\uff0c\u6211\u731c\u6d4b\u53ef\u80fd\u662f\u9700\u8981\u4e0a\u4f20\u4e0b\u8f7d\u7684\u6570\u636e\u592a\u591a\uff0c\u6240\u4ee5\u8d85\u65f6\u5bfc\u81f4\u4e22\u5305\u7684\u6982\u7387\u4e5f\u66f4\u5927\u5427\u3002<\/p>\n<p>\u6839\u636e\u8fd9\u4e2a\u731c\u60f3\uff0c\u7fa4\u767b\u4e0a\u670d\u52a1\u5668\uff0c\u4f7f\u7528\u8bf7\u6c42\u7684 request_id \u5728\u8fd1\u671f\u670d\u52a1\u65e5\u5fd7\u4e2d\u641c\u7d22\u4e00\u4e0b\uff0c\u679c\u4e0d\u5176\u7136\uff0c\u5c31\u662f\u7f51\u7edc\u4e22\u5305\u95ee\u9898\u5bfc\u81f4\u7684\u63a5\u53e3\u8d85\u65f6\u4e86\u3002<\/p>\n<p>\u5f53\u7136\u8fd9\u6837 leader \u662f\u4e0d\u4f1a\u6ee1\u610f\u7684\uff0c\u8fd9\u4e2a\u7ed3\u8bba\u8fd8\u5f97\u6709\u4eba\u63a5\u9505\u624d\u884c\u3002\u4e8e\u662f\u8d76\u7d27\u8054\u7cfb\u8fd0\u7ef4\u548c\u7f51\u7edc\u7ec4\uff0c\u5411\u4ed6\u4eec\u786e\u8ba4\u4e00\u4e0b\u5f53\u65f6\u7684\u7f51\u7edc\u72b6\u6001\u3002\u7f51\u7edc\u7ec4\u540c\u5b66\u56de\u590d\u8bf4\u662f\u6211\u4eec\u63a2\u6d4b\u670d\u52a1\u6240\u5728\u673a\u623f\u7684\u4ea4\u6362\u673a\u8001\u65e7\uff0c\u5b58\u5728\u672a\u77e5\u7684\u8f6c\u53d1\u74f6\u9888\uff0c\u6b63\u5728\u4f18\u5316\uff0c\u8fd9\u8ba9\u6211\u66f4\u653e\u5fc3\u4e86\uff0c\u4e8e\u662f\u5728\u90e8\u95e8\u7fa4\u91cc\u7b80\u5355\u4ea4\u5f85\u4e00\u4e0b\uff0c\u7b97\u662f\u5b8c\u6210\u4efb\u52a1\u3002<\/p>\n<h4>\u95ee\u9898\u7206\u53d1<\/h4>\n<p>\u672c\u4ee5\u4e3a\u8fd9\u6b21\u503c\u73ed\u5c31\u8d77\u8fd9\u4e48\u4e00\u4e2a\u5c0f\u6ce2\u6d6a\uff0c\u7ed3\u679c\u5728\u665a\u4e0a\u516b\u70b9\u591a\uff0c\u5404\u79cd\u63a5\u53e3\u7684\u62a5\u8b66\u90ae\u4ef6\u8702\u62e5\u800c\u81f3\uff0c\u6253\u5f97\u51c6\u5907\u6536\u62fe\u4e1c\u897f\u8fc7\u5468\u65e5\u5355\u4f11\u7684\u6211\u63aa\u624b\u4e0d\u53ca\u3002<\/p>\n<p>\u8fd9\u6b21\u51e0\u4e4e\u6240\u6709\u7684\u63a5\u53e3\u90fd\u5728\u8d85\u65f6\uff0c\u800c\u6211\u4eec\u90a3\u4e2a\u5927\u91cf\u7f51\u7edc I\/O \u7684\u63a5\u53e3\u5219\u662f\u6bcf\u6b21\u63a2\u6d4b\u5fc5\u8d85\u65f6\uff0c\u96be\u9053\u662f\u6574\u4e2a\u673a\u623f\u6545\u969c\u4e86\u4e48\u3002<\/p>\n<p>\u6211\u518d\u6b21\u901a\u8fc7\u670d\u52a1\u5668\u548c\u76d1\u63a7\u770b\u5230\u5404\u4e2a\u63a5\u53e3\u7684\u6307\u6807\u90fd\u5f88\u6b63\u5e38\uff0c\u81ea\u5df1\u6d4b\u8bd5\u4e86\u4e0b\u63a5\u53e3\u4e5f\u5b8c\u5168 OK\uff0c\u65e2\u7136\u4e0d\u5f71\u54cd\u7ebf\u4e0a\u670d\u52a1\uff0c\u6211\u51c6\u5907\u5148\u901a\u8fc7\u63a2\u6d4b\u670d\u52a1\u7684\u63a5\u53e3\u628a\u63a2\u6d4b\u4efb\u52a1\u505c\u6389\u518d\u6162\u6162\u6392\u67e5\u3002<\/p>\n<p>\u7ed3\u679c\u7ed9\u6682\u505c\u63a2\u6d4b\u4efb\u52a1\u7684\u63a5\u53e3\u53d1\u8bf7\u6c42\u597d\u4e45\u4e5f\u6ca1\u6709\u54cd\u5e94\uff0c\u8fd9\u65f6\u5019\u6211\u624d\u77e5\u9053\u6ca1\u8fd9\u4e48\u7b80\u5355\u3002<\/p>\n<h3>\u89e3\u51b3<\/h3>\n<hr>\n<h4>\u5185\u5b58\u6cc4\u6f0f<\/h4>\n<p>\u4e8e\u662f\u8d76\u5feb\u767b\u9646\u63a2\u6d4b\u670d\u52a1\u5668\uff0c\u9996\u5148\u662f <code>top free df<\/code> \u4e09\u8fde\uff0c\u7ed3\u679c\u8fd8\u771f\u53d1\u73b0\u4e86\u4e9b\u5f02\u5e38\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc5Yld\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u6211\u4eec\u7684\u63a2\u6d4b\u8fdb\u7a0b CPU \u5360\u7528\u7387\u7279\u522b\u9ad8\uff0c\u8fbe\u5230\u4e86 900%\u3002\u53e6\u5916\uff0cJVM \u7cfb\u5217\u9762\u8bd5\u9898\u548c\u7b54\u6848\u5168\u90e8\u6574\u7406\u597d\u4e86\uff0c\u5fae\u4fe1\u641c\u7d22\u200bJava\u6280\u672f\u6808\uff0c\u5728\u540e\u53f0\u53d1\u9001\uff1a\u9762\u8bd5\uff0c\u200b\u53ef\u4ee5\u5728\u7ebf\u9605\u8bfb\u3002<\/p>\n<p>\u6211\u4eec\u7684 Java \u8fdb\u7a0b\uff0c\u5e76\u4e0d\u505a\u5927\u91cf CPU \u8fd0\u7b97\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0cCPU \u5e94\u8be5\u5728 100~200% \u4e4b\u95f4\uff0c\u51fa\u73b0\u8fd9\u79cd CPU \u98d9\u5347\u7684\u60c5\u51b5\uff0c\u8981\u4e48\u8d70\u5230\u4e86\u6b7b\u5faa\u73af\uff0c\u8981\u4e48\u5c31\u662f\u5728\u505a\u5927\u91cf\u7684 GC\u3002<\/p>\n<p>\u4f7f\u7528 <code>jstat -gc pid [interval]<\/code> \u547d\u4ee4\u67e5\u770b\u4e86 java \u8fdb\u7a0b\u7684 GC \u72b6\u6001\uff0c\u679c\u7136\uff0cFULL GC \u8fbe\u5230\u4e86\u6bcf\u79d2\u4e00\u6b21\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc5Yle\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u8fd9\u4e48\u591a\u7684 FULL GC\uff0c\u5e94\u8be5\u662f\u5185\u5b58\u6cc4\u6f0f\u6ca1\u8dd1\u4e86\uff0c\u4e8e\u662f \u4f7f\u7528 <code>jstack pid &gt; jstack.log<\/code> \u4fdd\u5b58\u4e86\u7ebf\u7a0b\u6808\u7684\u73b0\u573a\uff0c\u4f7f\u7528 <code>jmap -dump:format=b,file=heap.log pid<\/code> \u4fdd\u5b58\u4e86\u5806\u73b0\u573a\uff0c\u7136\u540e\u91cd\u542f\u4e86\u63a2\u6d4b\u670d\u52a1\uff0c\u62a5\u8b66\u90ae\u4ef6\u7ec8\u4e8e\u505c\u6b62\u4e86\u3002<\/p>\n<h4>jstat<\/h4>\n<p>jstat \u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684 JVM \u76d1\u63a7\u5de5\u5177\uff0c\u4e00\u822c\u7528\u6cd5\u662f\uff1a <code>jstat [-options] pid interval<\/code><\/p>\n<p>\u5b83\u652f\u6301\u7684\u67e5\u770b\u9879\u6709\uff1a<\/p>\n<ul>\n<li>-class \u67e5\u770b\u7c7b\u52a0\u8f7d\u4fe1\u606f<\/li>\n<li>-compile \u7f16\u8bd1\u7edf\u8ba1\u4fe1\u606f<\/li>\n<li>-gc \u5783\u573e\u56de\u6536\u4fe1\u606f<\/li>\n<li>-gcXXX \u5404\u533a\u57df GC \u7684\u8be6\u7ec6\u4fe1\u606f \u5982 -gcold<\/li>\n<\/ul>\n<p>\u4f7f\u7528\u5b83\uff0c\u5bf9\u5b9a\u4f4d JVM \u7684\u5185\u5b58\u95ee\u9898\u5f88\u6709\u5e2e\u52a9\u3002<\/p>\n<h3>\u6392\u67e5<\/h3>\n<hr>\n<p>\u95ee\u9898\u867d\u7136\u89e3\u51b3\u4e86\uff0c\u4f46\u4e3a\u4e86\u9632\u6b62\u5b83\u518d\u6b21\u53d1\u751f\uff0c\u8fd8\u662f\u8981\u628a\u6839\u6e90\u63ea\u51fa\u6765\u3002<\/p>\n<h4>\u5206\u6790\u6808<\/h4>\n<p>\u6808\u7684\u5206\u6790\u5f88\u7b80\u5355\uff0c\u770b\u4e00\u4e0b\u7ebf\u7a0b\u6570\u662f\u4e0d\u662f\u8fc7\u591a\uff0c\u591a\u6570\u6808\u90fd\u5728\u5e72\u561b\u3002<\/p>\n<pre><code>&gt; grep 'java.lang.Thread.State' jstack.log  | wc -l\n&gt; 464<\/code><\/pre>\n<p>\u624d\u56db\u767e\u591a\u7ebf\u7a0b\uff0c\u5e76\u65e0\u5f02\u5e38\u3002<\/p>\n<pre><code>&gt; grep -A 1 'java.lang.Thread.State' jstack.log  | grep -v 'java.lang.Thread.State' | sort | uniq -c |sort -n\n\n     10  at java.lang.Class.forName0(Native Method)\n     10  at java.lang.Object.wait(Native Method)\n     16  at java.lang.ClassLoader.loadClass(ClassLoader.java:404)\n     44  at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)\n    344  at sun.misc.Unsafe.park(Native Method)<\/code><\/pre>\n<p>\u7ebf\u7a0b\u72b6\u6001\u597d\u50cf\u4e5f\u65e0\u5f02\u5e38\uff0c\u63a5\u4e0b\u6765\u5206\u6790\u5806\u6587\u4ef6\u3002<\/p>\n<h4>\u4e0b\u8f7d\u5806 dump \u6587\u4ef6<\/h4>\n<p>\u5806\u6587\u4ef6\u90fd\u662f\u4e00\u4e9b\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u5728\u547d\u4ee4\u884c\u67e5\u770b\u975e\u5e38\u9ebb\u70e6\uff0cJava \u4e3a\u6211\u4eec\u63d0\u4f9b\u7684\u5de5\u5177\u90fd\u662f\u53ef\u89c6\u5316\u7684\uff0cLinux \u670d\u52a1\u5668\u4e0a\u53c8\u6ca1\u6cd5\u67e5\u770b\uff0c\u90a3\u4e48\u9996\u5148\u8981\u628a\u6587\u4ef6\u4e0b\u8f7d\u5230\u672c\u5730\u3002<\/p>\n<p>\u7531\u4e8e\u6211\u4eec\u8bbe\u7f6e\u7684\u5806\u5185\u5b58\u4e3a 4G\uff0c\u6240\u4ee5 dump \u51fa\u6765\u7684\u5806\u6587\u4ef6\u4e5f\u5f88\u5927\uff0c\u4e0b\u8f7d\u5b83\u786e\u5b9e\u975e\u5e38\u8d39\u4e8b\uff0c\u4e0d\u8fc7\u6211\u4eec\u53ef\u4ee5\u5148\u5bf9\u5b83\u8fdb\u884c\u4e00\u6b21\u538b\u7f29\u3002<\/p>\n<p><code>gzip<\/code> \u662f\u4e2a\u529f\u80fd\u5f88\u5f3a\u5927\u7684\u538b\u7f29\u547d\u4ee4\uff0c\u7279\u522b\u662f\u6211\u4eec\u53ef\u4ee5\u8bbe\u7f6e <code>-1 ~ -9<\/code> \u6765\u6307\u5b9a\u5b83\u7684\u538b\u7f29\u7ea7\u522b\uff0c\u6570\u636e\u8d8a\u5927\u538b\u7f29\u6bd4\u7387\u8d8a\u5927\uff0c\u8017\u65f6\u4e5f\u5c31\u8d8a\u957f\uff0c\u63a8\u8350\u4f7f\u7528 -6~7\uff0c -9 \u5b9e\u5728\u662f\u592a\u6162\u4e86\uff0c\u4e14\u6536\u76ca\u4e0d\u5927\uff0c\u6709\u8fd9\u4e2a\u538b\u7f29\u7684\u65f6\u95f4\uff0c\u591a\u51fa\u6765\u7684\u6587\u4ef6\u4e5f\u4e0b\u8f7d\u597d\u4e86\u3002<\/p>\n<h4>\u4f7f\u7528 MAT \u5206\u6790 jvm heap<\/h4>\n<p>MAT \u662f\u5206\u6790 Java \u5806\u5185\u5b58\u7684\u5229\u5668\uff0c\u4f7f\u7528\u5b83\u6253\u5f00\u6211\u4eec\u7684\u5806\u6587\u4ef6\uff08\u5c06\u6587\u4ef6\u540e\u7f00\u6539\u4e3a <code>.hprof<\/code>\uff09, \u5b83\u4f1a\u63d0\u793a\u6211\u4eec\u8981\u5206\u6790\u7684\u79cd\u7c7b\uff0c\u5bf9\u4e8e\u8fd9\u6b21\u5206\u6790\uff0c\u679c\u65ad\u9009\u62e9 <code>memory leak suspect<\/code>\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc5Ylf\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<p>\u4ece\u4e0a\u9762\u7684\u997c\u56fe\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u7edd\u5927\u591a\u6570\u5806\u5185\u5b58\u90fd\u88ab\u540c\u4e00\u4e2a\u5185\u5b58\u5360\u7528\u4e86\uff0c\u518d\u67e5\u770b\u5806\u5185\u5b58\u8be6\u60c5\uff0c\u5411\u4e0a\u5c42\u8ffd\u6eaf\uff0c\u5f88\u5feb\u5c31\u53d1\u73b0\u4e86\u7f6a\u9b41\u7978\u9996\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc5Ylg\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h4>\u5206\u6790\u4ee3\u7801<\/h4>\n<p>\u627e\u5230\u5185\u5b58\u6cc4\u6f0f\u7684\u5bf9\u8c61\u4e86\uff0c\u5728\u9879\u76ee\u91cc\u5168\u5c40\u641c\u7d22\u5bf9\u8c61\u540d\uff0c\u5b83\u662f\u4e00\u4e2a Bean \u5bf9\u8c61\uff0c\u7136\u540e\u5b9a\u4f4d\u5230\u5b83\u7684\u4e00\u4e2a\u7c7b\u578b\u4e3a Map \u7684\u5c5e\u6027\u3002<\/p>\n<p>\u8fd9\u4e2a Map \u6839\u636e\u7c7b\u578b\u7528 ArrayList \u5b58\u50a8\u4e86\u6bcf\u6b21\u63a2\u6d4b\u63a5\u53e3\u54cd\u5e94\u7684\u7ed3\u679c\uff0c\u6bcf\u6b21\u63a2\u6d4b\u5b8c\u90fd\u585e\u5230 ArrayList \u91cc\u53bb\u5206\u6790\uff0c\u7531\u4e8e Bean \u5bf9\u8c61\u4e0d\u4f1a\u88ab\u56de\u6536\uff0c\u8fd9\u4e2a\u5c5e\u6027\u53c8\u6ca1\u6709\u6e05\u9664\u903b\u8f91\uff0c\u6240\u4ee5\u5728\u670d\u52a1\u5341\u6765\u5929\u6ca1\u6709\u4e0a\u7ebf\u91cd\u542f\u7684\u60c5\u51b5\u4e0b\uff0c\u8fd9\u4e2a Map \u8d8a\u6765\u8d8a\u5927\uff0c\u76f4\u81f3\u5c06\u5185\u5b58\u5360\u6ee1\u3002<\/p>\n<p>\u5185\u5b58\u6ee1\u4e86\u4e4b\u540e\uff0c\u65e0\u6cd5\u518d\u7ed9 HTTP \u54cd\u5e94\u7ed3\u679c\u5206\u914d\u5185\u5b58\u4e86\uff0c\u6240\u4ee5\u4e00\u76f4\u5361\u5728 readLine \u90a3\u3002\u800c\u6211\u4eec\u90a3\u4e2a\u5927\u91cf I\/O \u7684\u63a5\u53e3\u62a5\u8b66\u6b21\u6570\u7279\u522b\u591a\uff0c\u4f30\u8ba1\u8ddf\u54cd\u5e94\u592a\u5927\u9700\u8981\u66f4\u591a\u5185\u5b58\u6709\u5173\u3002<\/p>\n<p>\u7ed9\u4ee3\u7801 owner \u63d0\u4e86 PR\uff0c\u95ee\u9898\u5706\u6ee1\u89e3\u51b3\u3002<\/p>\n<h2>\u5c0f\u7ed3<\/h2>\n<hr>\n<p>\u5176\u5b9e\u8fd8\u662f\u8981\u53cd\u7701\u4e00\u4e0b\u81ea\u5df1\u7684\uff0c\u4e00\u5f00\u59cb\u62a5\u8b66\u90ae\u4ef6\u91cc\u8fd8\u6709\u8fd9\u6837\u7684\u7ebf\u7a0b\u6808\uff1a<\/p>\n<pre><code>groovy.json.internal.JsonParserCharArray.decodeValueInternal(JsonParserCharArray.java:166)\ngroovy.json.internal.JsonParserCharArray.decodeJsonObject(JsonParserCharArray.java:132)\ngroovy.json.internal.JsonParserCharArray.decodeValueInternal(JsonParserCharArray.java:186)\ngroovy.json.internal.JsonParserCharArray.decodeJsonObject(JsonParserCharArray.java:132)\ngroovy.json.internal.JsonParserCharArray.decodeValueInternal(JsonParserCharArray.java:186)<\/code><\/pre>\n<p>\u770b\u5230\u8fd9\u79cd\u62a5\u9519\u7ebf\u7a0b\u6808\u5374\u6ca1\u6709\u7ec6\u60f3\uff0c\u8981\u77e5\u9053 TCP \u662f\u80fd\u4fdd\u8bc1\u6d88\u606f\u5b8c\u6574\u6027\u7684\uff0c\u51b5\u4e14\u6d88\u606f\u6ca1\u6709\u63a5\u6536\u5b8c\u4e5f\u4e0d\u4f1a\u628a\u503c\u8d4b\u7ed9\u53d8\u91cf\uff0c\u8fd9\u79cd\u5f88\u660e\u663e\u7684\u662f\u5185\u90e8\u9519\u8bef\uff0c\u5982\u679c\u7559\u610f\u540e\u7ec6\u67e5\u662f\u80fd\u63d0\u524d\u67e5\u51fa\u95ee\u9898\u6240\u5728\u7684\uff0c\u67e5\u95ee\u9898\u771f\u662f\u5dee\u4e86\u54ea\u4e00\u73af\u90fd\u4e0d\u884c\u554a\u3002<\/p>\n<p><strong>\u8fd1\u671f\u70ed\u6587\u63a8\u8350\uff1a<\/strong><\/p>\n<p>1.<a href=\"https:\/\/link.segmentfault.com\/?enc=wr0ytL9gzw%2BaBblVdRIJmg%3D%3D.AZ5NS4R%2FIi7DF1GlCoxj5iWSjg6JSIa8hz7c9O5GSvs%3D\" rel=\"nofollow\">1,000+ \u9053 Java\u9762\u8bd5\u9898\u53ca\u7b54\u6848\u6574\u7406(2022\u6700\u65b0\u7248)<\/a><\/p>\n<p>2.<a href=\"https:\/\/link.segmentfault.com\/?enc=pt80nlthJs8cBhuFBJCEJA%3D%3D.FIpbP4JBzBhQ1tKT0YYSog%2BAsF7AxbUWszHhJNl1rLr1JHeMS3inBvWVUrCCI%2BS6uYIy8fwa0c3r0DSZ1%2FBf7Q%3D%3D\" rel=\"nofollow\">\u52b2\u7206\uff01Java \u534f\u7a0b\u8981\u6765\u4e86\u3002\u3002\u3002<\/a><\/p>\n<p>3.<a href=\"https:\/\/link.segmentfault.com\/?enc=hLOvk6HKUCywg5voaE%2B%2Fdg%3D%3D.yXEmdlcg%2BWNwUmvp3rul%2BpybCb6BzF%2FMnPToKYyp%2B%2F2Momt5frUVP6OuW0vw5v1c\" rel=\"nofollow\">Spring Boot 2.x \u6559\u7a0b\uff0c\u592a\u5168\u4e86\uff01<\/a><\/p>\n<p>4.<a href=\"https:\/\/link.segmentfault.com\/?enc=yaqWAavUSkM5MtTPxJeH4A%3D%3D.oIGHHjFSMmSBhORIm8EqkrRPd59qBxUZ8LKvtxgMt95XIYzulrqTE7%2B5qEnaOlgP00Z21PwuQbQGg%2FOgErQxYw%3D%3D\" rel=\"nofollow\">\u522b\u518d\u5199\u6ee1\u5c4f\u7684\u7206\u7206\u7206\u70b8\u7c7b\u4e86\uff0c\u8bd5\u8bd5\u88c5\u9970\u5668\u6a21\u5f0f\uff0c\u8fd9\u624d\u662f\u4f18\u96c5\u7684\u65b9\u5f0f\uff01\uff01<\/a><\/p>\n<p>5.<a href=\"https:\/\/link.segmentfault.com\/?enc=paOU%2BPcUKMhG7QdG2sQAZg%3D%3D.arokkOHb1%2FOzj%2B4Y97A9jkWahVrK0z1cTZqW%2FqMrhtl2qYYWqg6%2BHEJdZHZLgvGQgRAJD1VB9oDJBi2tKoHfOUD68raZvV78FvM%2FII0r2IE%3D\" rel=\"nofollow\">\u300aJava\u5f00\u53d1\u624b\u518c\uff08\u5d69\u5c71\u7248\uff09\u300b\u6700\u65b0\u53d1\u5e03\uff0c\u901f\u901f\u4e0b\u8f7d\uff01<\/a><\/p>\n<p>\u89c9\u5f97\u4e0d\u9519\uff0c\u522b\u5fd8\u4e86\u968f\u624b\u70b9\u8d5e+\u8f6c\u53d1\u54e6\uff01<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000043330257\">https:\/\/segmentfault.com\/a\/1190000043330257<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6765\u6e90\uff1azhenbianshu.github.io\/ \u524d\u4e9b\u65e5\u5b50\u5c0f\u7ec4\u5185\u5b89\u6392\u503c\u73ed\uff0c\u8f6e\u6d41\u770b\u987e\u6211\u4eec\u7684\u670d\u52a1\uff0c\u4e3b\u8981\u505a\u4e00\u4e9b\u62a5\u8b66 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10007074","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10007074","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10007074"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10007074\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10007074"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10007074"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10007074"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}