{"id":65438,"date":"2026-01-24T23:57:45","date_gmt":"2026-01-24T15:57:45","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/65438.html"},"modified":"2026-01-24T23:57:45","modified_gmt":"2026-01-24T15:57:45","slug":"%e6%b7%b1%e5%85%a5%e8%a7%a3%e6%9e%90-java-%e8%99%9a%e6%8b%9f%e6%9c%ba%e5%86%85%e5%ad%98%e6%a8%a1%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/65438.html","title":{"rendered":"\u6df1\u5165\u89e3\u6790 Java \u865a\u62df\u673a\u5185\u5b58\u6a21\u578b"},"content":{"rendered":"<h2>\u5f15\u8a00<\/h2>\n<p>\u5728 Java \u5f00\u53d1\u4e2d&#xff0c;\u7406\u89e3\u00a0Java \u865a\u62df\u673a&#xff08;JVM&#xff09;\u5185\u5b58\u6a21\u578b\u00a0\u5bf9\u4e8e\u5f00\u53d1\u8005\u4f18\u5316\u6027\u80fd\u3001\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u548c\u9ad8\u6548\u7ba1\u7406\u5185\u5b58\u81f3\u5173\u91cd\u8981\u3002JVM \u5185\u5b58\u6a21\u578b\u4e3b\u8981\u7531\u591a\u4e2a\u533a\u57df\u7ec4\u6210&#xff0c;\u6db5\u76d6\u4e86\u4ece\u7a0b\u5e8f\u8ba1\u6570\u5668\u5230\u76f4\u63a5\u5185\u5b58\u7b49\u591a\u4e2a\u65b9\u9762\u3002\u6bcf\u4e2a\u533a\u57df\u6709\u5176\u7279\u5b9a\u7684\u4f5c\u7528\u3001\u7ba1\u7406\u65b9\u5f0f\u548c\u751f\u547d\u5468\u671f\u3002<\/p>\n<\/p>\n<p>\u672c\u6587\u5c06\u8be6\u7ec6\u63a2\u8ba8 JVM \u5185\u5b58\u6a21\u578b\u7684\u5404\u4e2a\u90e8\u5206&#xff0c;\u5206\u6790\u5806\u548c\u6808\u7684\u533a\u522b&#xff0c;\u4ecb\u7ecd JVM \u5185\u5b58\u533a\u57df\u7684\u5212\u5206&#xff0c;\u5e2e\u52a9\u5f00\u53d1\u8005\u6df1\u5165\u7406\u89e3 Java \u7a0b\u5e8f\u7684\u5185\u5b58\u7ba1\u7406\u3002<\/p>\n<h2>JVM \u7684\u5185\u5b58\u6a21\u578b<\/h2>\n<p>JVM \u5185\u5b58\u6a21\u578b\u662f Java \u7a0b\u5e8f\u8fd0\u884c\u65f6\u6240\u4f7f\u7528\u7684\u5185\u5b58\u7ed3\u6784&#xff0c;\u5b83\u4e3a Java \u5e94\u7528\u7a0b\u5e8f\u7684\u6267\u884c\u63d0\u4f9b\u4e86\u4e00\u4e2a\u6e05\u6670\u7684\u5185\u5b58\u7ba1\u7406\u6846\u67b6\u3002\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u90e8\u5206&#xff1a;<\/p>\n<p>\u7a0b\u5e8f\u8ba1\u6570\u5668&#xff08;Program Counter Register&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u7a0b\u5e8f\u8ba1\u6570\u5668\u662f\u4e00\u5757\u5f88\u5c0f\u7684\u5185\u5b58\u533a\u57df&#xff0c;\u7528\u6765\u5b58\u50a8\u5f53\u524d\u7ebf\u7a0b\u6240\u6267\u884c\u7684\u5b57\u8282\u7801\u7684\u5730\u5740\u3002\u5b83\u662f\u7ebf\u7a0b\u79c1\u6709\u7684&#xff0c;\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6709\u81ea\u5df1\u7684\u7a0b\u5e8f\u8ba1\u6570\u5668\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f5c\u7528&#xff1a;\u7ebf\u7a0b\u5207\u6362\u65f6&#xff0c;\u7a0b\u5e8f\u8ba1\u6570\u5668\u53ef\u4ee5\u4fdd\u5b58\u5f53\u524d\u7ebf\u7a0b\u6267\u884c\u7684\u4f4d\u7f6e&#xff0c;\u4ee5\u4fbf\u6062\u590d\u6267\u884c\u3002<\/p>\n<\/li>\n<\/ul>\n<p>Java \u865a\u62df\u673a\u6808&#xff08;JVM Stack&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u6bcf\u4e2a\u7ebf\u7a0b\u5728\u521b\u5efa\u65f6\u90fd\u4f1a\u5206\u914d\u4e00\u4e2a\u865a\u62df\u673a\u6808&#xff0c;\u7528\u4e8e\u5b58\u50a8\u65b9\u6cd5\u8c03\u7528\u65f6\u7684\u6808\u5e27\u3002\u6808\u5e27\u5305\u542b\u4e86\u5c40\u90e8\u53d8\u91cf\u3001\u64cd\u4f5c\u6570\u6808\u3001\u52a8\u6001\u94fe\u63a5\u548c\u65b9\u6cd5\u51fa\u53e3\u7b49\u4fe1\u606f\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f5c\u7528&#xff1a;\u6bcf\u4e2a\u65b9\u6cd5\u8c03\u7528\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u6808\u5e27&#xff0c;\u6808\u5e27\u4f1a\u5728\u65b9\u6cd5\u8c03\u7528\u7ed3\u675f\u65f6\u9500\u6bc1\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u672c\u5730\u65b9\u6cd5\u6808&#xff08;Native Method Stack&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u672c\u5730\u65b9\u6cd5\u6808\u4e13\u95e8\u7528\u4e8e\u5904\u7406\u672c\u5730\u65b9\u6cd5&#xff08;\u5373\u7531 JNI \u8c03\u7528\u7684 C \u6216 C&#043;&#043; \u65b9\u6cd5&#xff09;\u3002\u5b83\u548c Java \u865a\u62df\u673a\u6808\u7c7b\u4f3c&#xff0c;\u4f46\u4e13\u95e8\u7528\u4e8e\u652f\u6301 Native \u65b9\u6cd5\u7684\u8c03\u7528\u3002<\/p>\n<\/li>\n<\/ul>\n<p>Java \u5806&#xff08;Heap&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>Java \u5806\u662f JVM \u5185\u5b58\u7ba1\u7406\u7684\u6838\u5fc3\u90e8\u5206&#xff0c;\u4e3b\u8981\u7528\u4e8e\u5b58\u50a8\u5bf9\u8c61\u5b9e\u4f8b\u548c\u6570\u7ec4\u3002\u6240\u6709\u7684\u7c7b\u5b9e\u4f8b\u548c\u6570\u7ec4\u90fd\u5728\u5806\u4e2d\u5206\u914d\u5185\u5b58\u3002\u5806\u662f\u6240\u6709\u7ebf\u7a0b\u5171\u4eab\u7684\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f5c\u7528&#xff1a;\u5783\u573e\u56de\u6536\u5668\u4f1a\u5728\u5806\u5185\u8fdb\u884c\u5783\u573e\u56de\u6536&#xff0c;\u56de\u6536\u4e0d\u518d\u88ab\u5f15\u7528\u7684\u5bf9\u8c61\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u65b9\u6cd5\u533a&#xff08;Method Area&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u65b9\u6cd5\u533a\u7528\u4e8e\u5b58\u50a8\u00a0\u7c7b\u4fe1\u606f\u3001\u5e38\u91cf\u3001\u9759\u6001\u53d8\u91cf\u3001\u5373\u65f6\u7f16\u8bd1\u5668\u7f16\u8bd1\u540e\u7684\u4ee3\u7801\u00a0\u7b49\u6570\u636e\u3002\u65b9\u6cd5\u533a\u88ab\u6240\u6709\u7ebf\u7a0b\u5171\u4eab\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f5c\u7528&#xff1a;\u5b83\u76f8\u5f53\u4e8e\u7a0b\u5e8f\u7684\u00a0\u6c38\u4e45\u4ee3&#xff08;\u5728 JDK 1.8 \u4e4b\u524d&#xff09;&#xff0c;\u5b83\u5728 JDK 1.8 \u4e2d\u88ab\u79f0\u4e3a\u00a0\u5143\u7a7a\u95f4\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60&#xff08;Runtime Constant Pool&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60\u662f\u65b9\u6cd5\u533a\u7684\u4e00\u90e8\u5206&#xff0c;\u4e3b\u8981\u7528\u4e8e\u5b58\u50a8\u00a0\u7c7b\u7684\u5e38\u91cf\u00a0\u548c\u00a0\u9759\u6001\u53d8\u91cf\u3002\u5e38\u91cf\u6c60\u4e2d\u7684\u6570\u636e\u4f1a\u88ab\u6bcf\u4e2a\u7c7b\u5171\u4eab\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u76f4\u63a5\u5185\u5b58&#xff08;Direct Memory&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u76f4\u63a5\u5185\u5b58\u5e76\u4e0d\u662f JVM \u5185\u5b58\u6a21\u578b\u7684\u4e00\u90e8\u5206&#xff0c;\u4f46\u5b83\u662f\u901a\u8fc7\u00a0NIO&#xff08;New IO&#xff09;\u00a0\u5e93\u4e2d\u7684\u00a0ByteBuffer\u00a0\u6765\u5206\u914d\u7684\u5185\u5b58\u533a\u57df&#xff0c;\u7528\u4e8e\u76f4\u63a5\u4e0e OS \u7684 I\/O \u7cfb\u7edf\u8fdb\u884c\u4ea4\u4e92\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f5c\u7528&#xff1a;\u901a\u8fc7\u76f4\u63a5\u5185\u5b58&#xff0c;Java \u53ef\u4ee5\u76f4\u63a5\u4e0e\u64cd\u4f5c\u7cfb\u7edf\u7684\u5185\u5b58\u8fdb\u884c\u4ea4\u4e92&#xff0c;\u51cf\u5c11\u4e86\u5185\u5b58\u590d\u5236\u7684\u5f00\u9500\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u5806\u548c\u6808\u7684\u533a\u522b<\/h2>\n<p>\u5806\u548c\u6808\u662f JVM \u5185\u5b58\u6a21\u578b\u4e2d\u7684\u4e24\u4e2a\u4e3b\u8981\u533a\u57df&#xff0c;\u5b83\u4eec\u5728\u7528\u9014\u3001\u751f\u547d\u5468\u671f\u3001\u5b58\u53d6\u901f\u5ea6\u7b49\u65b9\u9762\u6709\u663e\u8457\u7684\u533a\u522b\u3002<\/p>\n<table>\n<tr>\u533a\u57df\u5806\u6808<\/tr>\n<tbody>\n<tr>\n<td>\u7528\u9014<\/td>\n<td>\u5b58\u50a8\u5bf9\u8c61\u5b9e\u4f8b\u548c\u6570\u7ec4<\/td>\n<td>\u5b58\u50a8\u65b9\u6cd5\u8c03\u7528\u65f6\u7684\u5c40\u90e8\u53d8\u91cf\u548c\u6808\u5e27<\/td>\n<\/tr>\n<tr>\n<td>\u751f\u547d\u5468\u671f<\/td>\n<td>\u5bf9\u8c61\u751f\u547d\u5468\u671f\u7531\u5783\u573e\u56de\u6536\u5668\u7ba1\u7406<\/td>\n<td>\u968f\u7740\u65b9\u6cd5\u8c03\u7528\u7684\u7ed3\u675f\u800c\u9500\u6bc1<\/td>\n<\/tr>\n<tr>\n<td>\u5b58\u53d6\u901f\u5ea6<\/td>\n<td>\u8f83\u6162&#xff0c;\u56e0\u4e3a\u9700\u8981\u8fdb\u884c\u5783\u573e\u56de\u6536\u548c\u5bf9\u8c61\u7ba1\u7406<\/td>\n<td>\u8f83\u5feb&#xff0c;\u64cd\u4f5c\u5c40\u90e8\u53d8\u91cf\u548c\u65b9\u6cd5\u8c03\u7528\u65f6\u7684\u5806\u6808<\/td>\n<\/tr>\n<tr>\n<td>\u5b58\u50a8\u7a7a\u95f4<\/td>\n<td>\u8f83\u5927&#xff0c;\u9002\u5408\u5b58\u50a8\u5927\u91cf\u6570\u636e<\/td>\n<td>\u8f83\u5c0f&#xff0c;\u6bcf\u4e2a\u7ebf\u7a0b\u7684\u6808\u5927\u5c0f\u662f\u56fa\u5b9a\u7684<\/td>\n<\/tr>\n<tr>\n<td>\u53ef\u89c1\u6027<\/td>\n<td>\u5171\u4eab\u533a\u57df&#xff0c;\u6240\u6709\u7ebf\u7a0b\u90fd\u53ef\u4ee5\u8bbf\u95ee<\/td>\n<td>\u6bcf\u4e2a\u7ebf\u7a0b\u79c1\u6709&#xff0c;\u7ebf\u7a0b\u95f4\u4e0d\u53ef\u89c1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u6808\u4e2d\u5b58\u7684\u662f\u6307\u9488\u8fd8\u662f\u5bf9\u8c61<\/h2>\n<p>\u5728\u6808\u4e2d&#xff0c;\u5b58\u50a8\u7684\u4e3b\u8981\u662f\u65b9\u6cd5\u8c03\u7528\u8fc7\u7a0b\u4e2d\u7684\u00a0\u5c40\u90e8\u53d8\u91cf\u00a0\u548c\u00a0\u6808\u5e27&#xff0c;\u800c\u4e0d\u662f\u5b9e\u9645\u7684\u5bf9\u8c61\u3002\u5bf9\u8c61\u5b9e\u4f8b\u662f\u5b58\u50a8\u5728\u00a0\u5806\u00a0\u4e2d\u7684&#xff0c;\u800c\u6808\u4e2d\u5b58\u50a8\u7684\u662f\u6307\u5411\u8fd9\u4e9b\u5bf9\u8c61\u7684\u00a0\u5f15\u7528\u00a0\u6216\u00a0\u6307\u9488\u3002<\/p>\n<p>\u5177\u4f53\u6765\u8bf4&#xff0c;\u5f53\u6211\u4eec\u5728\u65b9\u6cd5\u4e2d\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u65f6&#xff0c;\u6808\u4e2d\u4f1a\u5206\u914d\u5185\u5b58\u6765\u5b58\u50a8\u8be5\u5bf9\u8c61\u7684\u00a0\u5f15\u7528&#xff08;\u6307\u9488&#xff09;&#xff0c;\u800c\u5bf9\u8c61\u7684\u5b9e\u9645\u6570\u636e\u5b58\u50a8\u5728\u5806\u4e2d\u3002\u6808\u4e2d\u6ca1\u6709\u5b9e\u9645\u5b58\u50a8\u5bf9\u8c61\u7684\u5185\u5bb9&#xff0c;\u53ea\u662f\u6307\u5411\u5806\u4e2d\u5bf9\u8c61\u7684\u5185\u5b58\u4f4d\u7f6e\u3002<\/p>\n<h2>\u5806\u7684\u4e0d\u540c\u90e8\u5206<\/h2>\n<p>\u5806\u5185\u5b58\u901a\u5e38\u88ab\u5212\u5206\u4e3a\u591a\u4e2a\u4e0d\u540c\u7684\u533a\u57df&#xff0c;\u7528\u6765\u4f18\u5316\u00a0\u5783\u573e\u56de\u6536&#xff08;GC&#xff09;\u548c\u5185\u5b58\u5206\u914d\u3002\u4e3b\u8981\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u65b0\u751f\u4ee3&#xff08;Young Generation&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u65b0\u751f\u4ee3\u7528\u4e8e\u5b58\u50a8\u65b0\u521b\u5efa\u7684\u5bf9\u8c61\u3002\u7531\u4e8e\u5927\u90e8\u5206\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u8f83\u77ed&#xff0c;\u56e0\u6b64\u65b0\u751f\u4ee3\u7684\u5783\u573e\u56de\u6536\u4f1a\u66f4\u9891\u7e41\u3002<\/p>\n<\/li>\n<li>\n<p>\u65b0\u751f\u4ee3\u53c8\u53ef\u4ee5\u5212\u5206\u4e3a\u00a0Eden \u533a\u00a0\u548c\u00a0\u4e24\u4e2a Survivor \u533a\u3002\u65b0\u5bf9\u8c61\u5148\u5206\u914d\u5728 Eden \u533a&#xff0c;\u5f53 Eden \u533a\u6ee1\u65f6&#xff0c;\u5bf9\u8c61\u4f1a\u79fb\u52a8\u5230 Survivor \u533a&#xff0c;\u6700\u7ec8\u79fb\u52a8\u5230\u8001\u5e74\u4ee3\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u8001\u5e74\u4ee3&#xff08;Old Generation&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u8001\u5e74\u4ee3\u7528\u4e8e\u5b58\u50a8\u957f\u65f6\u95f4\u5b58\u6d3b\u7684\u5bf9\u8c61\u3002\u4e00\u822c\u6765\u8bf4&#xff0c;\u5f53\u4e00\u4e2a\u5bf9\u8c61\u5728\u65b0\u751f\u4ee3\u7ecf\u8fc7\u591a\u6b21\u5783\u573e\u56de\u6536\u540e\u8fd8\u5b58\u6d3b&#xff0c;\u5c31\u4f1a\u88ab\u79fb\u5230\u8001\u5e74\u4ee3\u3002<\/p>\n<\/li>\n<li>\n<p>\u8001\u5e74\u4ee3\u7684\u5783\u573e\u56de\u6536\u9891\u7387\u8f83\u4f4e&#xff0c;\u56de\u6536\u5f00\u9500\u8f83\u5927\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u5143\u7a7a\u95f4&#xff08;Metaspace&#xff09;&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u5728 JDK 1.8 \u4e4b\u524d&#xff0c;\u65b9\u6cd5\u533a\u548c\u6c38\u4e45\u4ee3&#xff08;PermGen&#xff09;\u662f\u5806\u7684\u4e00\u90e8\u5206&#xff0c;\u5b58\u50a8\u7c7b\u7684\u5143\u6570\u636e\u3002JDK 1.8 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