{"id":73870,"date":"2026-02-08T14:49:38","date_gmt":"2026-02-08T06:49:38","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/73870.html"},"modified":"2026-02-08T14:49:38","modified_gmt":"2026-02-08T06:49:38","slug":"2026%e6%9c%80%e6%96%b0java%e9%9d%a2%e8%af%95%e5%85%ab%e8%82%a1%e6%96%87%ef%bc%8c%e4%b8%87%e5%ad%97%e9%95%bf%e6%96%87%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/73870.html","title":{"rendered":"2026\u6700\u65b0JAVA\u9762\u8bd5\u516b\u80a1\u6587\uff0c\u4e07\u5b57\u957f\u6587\uff01"},"content":{"rendered":"<h3 id=\"%C2%A0%E4%B8%80%E3%80%81%E5%9F%BA%E7%A1%80%E7%AF%87\">\u00a0\u4e00\u3001\u57fa\u7840\u7bc7<\/h3>\n<h4 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call()&#xff09;\u3002\u72d7\u7c7b\u548c\u732b\u7c7b\u90fd\u7ee7\u627f\u81ea\u52a8\u7269\u7c7b&#xff0c;\u5e76\u4e14\u90fd\u8986\u76d6\u4e86\u53eb\u7684\u65b9\u6cd5\u3002\u72d7\u7c7b\u7684\u53eb\u65b9\u6cd5\u662f\u6c6a\u6c6a\u53eb&#xff0c;\u732b\u7c7b\u7684\u53eb\u65b9\u6cd5\u662f\u55b5\u55b5\u53eb\u3002\u5f53\u6709\u4e00\u4e2a\u52a8\u7269\u7c7b\u578b\u7684\u5f15\u7528\u6307\u5411\u72d7\u5bf9\u8c61\u65f6&#xff0c;\u8c03\u7528animal.call()\u5c31\u4f1a\u53d1\u51fa\u6c6a\u6c6a\u7684\u53eb\u58f0&#xff1b;\u5f53\u8fd9\u4e2a\u5f15\u7528\u6307\u5411\u732b\u5bf9\u8c61\u65f6&#xff0c;\u8c03\u7528animal.call()\u5c31\u4f1a\u53d1\u51fa\u55b5\u55b5\u7684\u53eb\u58f0\u3002\u8fd9\u5c31\u662f\u8fd0\u884c\u65f6\u591a\u6001&#xff0c;\u5177\u4f53\u8c03\u7528\u54ea\u4e2a\u7c7b\u7684\u53eb\u65b9\u6cd5\u662f\u5728\u8fd0\u884c\u65f6\u6839\u636e\u5bf9\u8c61\u7684\u5b9e\u9645\u7c7b\u578b&#xff08;\u72d7\u6216\u732b&#xff09;\u52a8\u6001\u786e\u5b9a\u7684\u3002<\/p>\n<\/li>\n<\/ul>\n<h4 id=\"2%E3%80%81%E6%A0%87%E8%AF%86%E7%AC%A6%E7%9A%84%E5%91%BD%E5%90%8D%E8%A7%84%E5%88%99\">3\u3001\u6807\u8bc6\u7b26\u7684\u547d\u540d\u89c4\u5219<\/h4>\n<p>\u6807\u8bc6\u7b26\u7684\u542b\u4e49&#xff1a;\u00a0\u00a0\u662f\u6307\u5728\u7a0b\u5e8f\u4e2d&#xff0c;\u6211\u4eec\u81ea\u5df1\u5b9a\u4e49\u7684\u5185\u5bb9&#xff0c;\u8b6c\u5982&#xff0c;\u7c7b\u7684\u540d\u5b57&#xff0c;\u65b9\u6cd5\u540d\u79f0\u4ee5\u53ca\u53d8\u91cf\u540d\u79f0\u7b49 \u7b49&#xff0c;\u90fd\u662f\u6807\u8bc6\u7b26\u3002<\/p>\n<p>\u547d\u540d\u89c4\u5219&#xff1a;&#xff08;\u786c\u6027\u8981\u6c42&#xff09;\u00a0\u00a0\u6807\u8bc6\u7b26\u53ef\u4ee5\u5305\u542b\u82f1\u6587\u5b57\u6bcd&#xff0c;0-9\u7684\u6570\u5b57&#xff0c;$\u4ee5\u53ca_ \u6807\u8bc6\u7b26\u4e0d\u80fd\u4ee5\u6570\u5b57\u5f00\u5934 \u6807 \u8bc6\u7b26\u4e0d\u662f\u5173\u952e\u5b57<\/p>\n<p>\u547d\u540d\u89c4\u8303&#xff1a;&#xff08;\u975e\u786c\u6027\u8981\u6c42&#xff09;\u00a0\u00a0\u7c7b\u540d\u89c4\u8303&#xff1a;\u9996\u5b57\u7b26\u5927\u5199&#xff0c;\u540e\u9762\u6bcf\u4e2a\u5355\u8bcd\u9996\u5b57\u6bcd\u5927\u5199&#xff08;\u5927\u9a7c\u5cf0\u5f0f&#xff09;\u3002\u00a0\u00a0 \u53d8\u91cf<\/p>\n<p>\u540d\u89c4\u8303&#xff1a;\u9996\u5b57\u6bcd\u5c0f\u5199&#xff0c;\u540e\u9762\u6bcf\u4e2a\u5355\u8bcd\u9996\u5b57\u6bcd\u5927\u5199&#xff08;\u5c0f\u9a7c\u5cf0\u5f0f&#xff09;\u3002\u00a0\u00a0 \u65b9\u6cd5\u540d\u89c4\u8303&#xff1a;\u540c\u53d8\u91cf\u540d\u3002<\/p>\n<\/p>\n<h4 id=\"3%E3%80%81Java%E8%87%AA%E5%8A%A8%E8%A3%85%E7%AE%B1%E4%B8%8E%E6%8B%86%E7%AE%B1\">4\u3001Java\u81ea\u52a8\u88c5\u7bb1\u4e0e\u62c6\u7bb1<\/h4>\n<p>\u88c5\u7bb1\u5c31\u662f\u81ea\u52a8\u5c06\u57fa\u672c\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u4e3a\u5305\u88c5\u5668\u7c7b\u578b&#xff08;int&#8211;&gt;Integer&#xff09;&#xff1b;\u8c03\u7528\u65b9\u6cd5&#xff1a;Integer\u7684\u00a0valueOf(int) \u65b9\u6cd5<\/p>\n<p>\u62c6\u7bb1\u5c31\u662f\u81ea\u52a8\u5c06\u5305\u88c5\u5668\u7c7b\u578b\u8f6c\u6362\u4e3a\u57fa\u672c\u6570\u636e\u7c7b\u578b&#xff08;Integer&#8211;&gt;int&#xff09;\u3002\u8c03\u7528\u65b9\u6cd5&#xff1a;Integer\u7684\u00a0intValue\u65b9\u6cd5<\/p>\n<\/p>\n<h4 id=\"4%E3%80%81%20%E6%96%B9%E6%B3%95%E9%87%8D%E8%BD%BD%E5%92%8C%E6%96%B9%E6%B3%95%E9%87%8D%E5%86%99%E7%9A%84%E5%8C%BA%E5%88%AB\">5\u3001 \u65b9\u6cd5\u91cd\u8f7d\u548c\u65b9\u6cd5\u91cd\u5199\u7684\u533a\u522b<\/h4>\n<p>\u91cd\u5199(Override)<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4ece\u5b57\u9762\u4e0a\u770b&#xff0c;\u91cd\u5199\u5c31\u662f\u91cd\u65b0\u5199\u4e00\u904d\u7684\u610f\u601d\u3002\u5176\u5b9e\u5c31\u662f\u5728\u5b50\u7c7b\u4e2d\u628a\u7236\u7c7b\u672c\u8eab\u6709\u7684\u65b9\u6cd5\u91cd\u65b0\u5199\u4e00\u904d\u3002\u5b50 \u7c7b\u7ee7\u627f\u4e86\u7236\u7c7b\u539f\u6709\u7684\u65b9\u6cd5&#xff0c;\u4f46\u6709\u65f6\u5b50\u7c7b\u5e76\u4e0d\u60f3\u539f\u5c01\u4e0d\u52a8\u7684\u7ee7\u627f\u7236\u7c7b\u4e2d\u7684\u67d0\u4e2a\u65b9\u6cd5&#xff0c;\u6240\u4ee5\u5728\u65b9\u6cd5\u540d&#xff0c;\u00a0 \u53c2\u6570\u5217\u8868&#xff0c;\u8fd4\u56de\u7c7b\u578b(\u9664\u8fc7\u5b50\u7c7b\u4e2d\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u662f\u7236\u7c7b\u4e2d\u65b9\u6cd5\u8fd4\u56de\u503c\u7684\u5b50\u7c7b\u65f6)\u90fd\u76f8\u540c\u7684\u60c5\u51b5\u4e0b&#xff0c;\u00a0 \u5bf9\u65b9\u6cd5\u4f53\u8fdb\u884c\u4fee\u6539\u6216\u91cd\u5199&#xff0c;\u8fd9\u5c31\u662f\u91cd\u5199\u3002\u4f46\u8981\u6ce8\u610f\u5b50\u7c7b\u51fd\u6570\u7684\u8bbf\u95ee\u4fee\u9970\u6743\u9650\u4e0d\u80fd\u5c11\u4e8e\u7236\u7c7b\u7684\u3002<\/p>\n<p>\u91cd\u8f7d&#xff08;Overload &#xff09;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5728\u4e00\u4e2a\u7c7b\u4e2d&#xff0c;\u540c\u540d\u7684\u65b9\u6cd5\u5982\u679c\u6709\u4e0d\u540c\u7684\u53c2\u6570\u5217\u8868&#xff08;\u53c2\u6570\u7c7b\u578b\u4e0d\u540c\u3001\u53c2\u6570\u4e2a\u6570\u4e0d\u540c\u751a\u81f3\u662f\u53c2\u6570\u987a\u5e8f\u4e0d\u540c&#xff09;\u5219\u89c6\u4e3a\u91cd\u8f7d\u3002\u540c\u65f6&#xff0c;\u91cd\u8f7d\u5bf9\u8fd4\u56de\u7c7b\u578b\u6ca1\u6709\u8981\u6c42&#xff0c;\u53ef\u4ee5\u76f8\u540c\u4e5f\u53ef\u4ee5\u4e0d\u540c&#xff0c;\u4f46\u4e0d\u80fd\u901a\u8fc7\u8fd4\u56de\u7c7b\u578b\u662f\u5426\u76f8\u540c\u6765\u5224\u65ad\u91cd\u8f7d\u3002<\/p>\n<\/p>\n<h4 id=\"5%E3%80%81%20equals%E4%B8%8E%C2%A0%3D%3D%C2%A0%E7%9A%84%E5%8C%BA%E5%88%AB\">6\u3001 equals\u4e0e\u00a0&#061;&#061;\u00a0\u7684\u533a\u522b<\/h4>\n<p>&#061;&#061; \u6bd4\u8f83\u7684\u662f\u53d8\u91cf(\u6808)\u5185\u5b58\u4e2d\u5b58\u653e\u7684\u5bf9\u8c61\u7684(\u5806)\u5185\u5b58\u5730\u5740&#xff0c;\u7528\u6765\u5224\u65ad\u4e24\u4e2a\u5bf9\u8c61\u7684\u5730\u5740\u662f\u5426\u76f8\u540c&#xff0c;\u5373\u662f \u5426\u662f\u6307\u76f8\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002\u6bd4\u8f83\u7684\u662f\u771f\u6b63\u610f\u4e49\u4e0a\u7684\u6307\u9488\u64cd\u4f5c\u3002<\/p>\n<p>equals\u7528\u6765\u6bd4\u8f83\u7684\u662f\u4e24\u4e2a\u5bf9\u8c61\u7684\u5185\u5bb9\u662f\u5426\u76f8\u7b49&#xff0c;\u7531\u4e8e\u6240\u6709\u7684\u7c7b\u90fd\u662f\u7ee7\u627f\u81eajava.lang.Object\u7c7b\u7684&#xff0c;\u6240 \u4ee5\u9002\u7528\u4e8e\u6240\u6709\u5bf9\u8c61&#xff0c;\u5982\u679c\u6ca1\u6709\u5bf9\u8be5\u65b9\u6cd5\u8fdb\u884c\u91cd\u5199\u7684\u8bdd&#xff0c;\u8c03\u7528\u7684\u4ecd\u7136\u662fObject\u7c7b\u4e2d\u7684\u65b9\u6cd5&#xff0c;\u800cObject\u00a0 \u4e2d\u7684equals\u65b9\u6cd5\u8fd4\u56de\u7684\u5374\u662f&#061;&#061;\u7684\u5224\u65ad\u3002<\/p>\n<p>\u7bc7\u5e45\u9650\u5236\u4e0b\u9762\u5c31\u53ea\u80fd\u7ed9\u5927\u5bb6\u5c55\u793a\u5c0f\u518c\u90e8\u5206\u5185\u5bb9\u4e86\u3002\u6574\u7406\u4e86\u4e00\u4efd\u6838\u5fc3\u9762\u8bd5\u7b14\u8bb0\u5305\u62ec\u4e86&#xff1a;Java\u9762\u8bd5\u3001Spring\u3001JVM\u3001MyBatis\u3001Redis\u3001MySQL\u3001\u5e76\u53d1\u7f16\u7a0b\u3001\u5fae\u670d\u52a1\u3001Linux\u3001Springboot\u3001SpringCloud\u3001MQ\u3001Kafc<\/p>\n<p>\u9700\u8981\u5168\u5957\u9762\u8bd5\u7b14\u8bb0\u53ca\u7b54\u6848<span class=\"link-card-box\"><span class=\"link-title\">\u3010\u70b9\u51fb\u6b64\u5904\u5373\u53ef\/\u514d\u8d39\u83b7\u53d6\u3011<\/span><span class=\"link-link\"><img decoding=\"async\" class=\"link-link-icon\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260208064934-698831fe84504.png\" \/>https:\/\/docs.qq.com\/doc\/DQXdYWE9LZ2ZHZ1ho<\/span><\/span><\/p>\n<h4 id=\"6%E3%80%81%20Hashcode%E7%9A%84%E4%BD%9C%E7%94%A8\">7\u3001\u00a0Hashcode\u7684\u4f5c\u7528<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0java\u7684\u96c6\u5408\u6709\u4e24\u7c7b&#xff0c;\u4e00\u7c7b\u662fList&#xff0c;\u8fd8\u6709\u4e00\u7c7b\u662fSet\u3002\u524d\u8005\u6709\u5e8f\u53ef\u91cd\u590d&#xff0c;\u540e\u8005\u65e0\u5e8f\u4e0d\u91cd\u590d\u3002\u5f53\u6211\u4eec\u5728set \u4e2d\u63d2\u5165\u7684\u65f6\u5019\u600e\u4e48\u5224\u65ad\u662f\u5426\u5df2\u7ecf\u5b58\u5728\u8be5\u5143\u7d20\u5462&#xff0c;\u53ef\u4ee5\u901a\u8fc7equals\u65b9\u6cd5\u3002\u4f46\u662f\u5982\u679c\u5143\u7d20\u592a\u591a&#xff0c;\u7528\u8fd9\u6837\u00a0 \u7684\u65b9\u6cd5\u5c31\u4f1a\u6bd4\u8f83\u6ee1\u3002<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e8e\u662f\u6709\u4eba\u53d1\u660e\u4e86\u54c8\u5e0c\u7b97\u6cd5\u6765\u63d0\u9ad8\u96c6\u5408\u4e2d\u67e5\u627e\u5143\u7d20\u7684\u6548\u7387\u3002\u8fd9\u79cd\u65b9\u5f0f\u5c06\u96c6\u5408\u5206\u6210\u82e5\u5e72\u4e2a\u5b58\u50a8\u533a\u57df&#xff0c;\u6bcf\u4e2a\u5bf9\u8c61\u53ef\u4ee5\u8ba1\u7b97\u51fa\u4e00\u4e2a\u54c8\u5e0c\u7801&#xff0c;\u53ef\u4ee5\u5c06\u54c8\u5e0c\u7801\u5206\u7ec4&#xff0c;\u6bcf\u7ec4\u5206\u522b\u5bf9\u5e94\u67d0\u4e2a\u5b58\u50a8\u533a\u57df&#xff0c;\u6839\u636e\u4e00\u4e2a\u5bf9\u8c61\u7684\u54c8\u5e0c\u7801\u5c31\u53ef\u4ee5\u786e\u5b9a\u8be5\u5bf9\u8c61\u5e94\u8be5\u5b58\u50a8\u7684\u90a3\u4e2a\u533a\u57df\u3002<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0hashCode\u65b9\u6cd5\u53ef\u4ee5\u8fd9\u6837\u7406\u89e3&#xff1a;\u5b83\u8fd4\u56de\u7684\u5c31\u662f\u6839\u636e\u5bf9\u8c61\u7684\u5185\u5b58\u5730\u5740\u6362\u7b97\u51fa\u7684\u4e00\u4e2a\u503c\u3002\u8fd9\u6837\u4e00\u6765&#xff0c;\u5f53\u96c6\u5408\u8981\u6dfb\u52a0\u65b0\u7684\u5143\u7d20\u65f6&#xff0c;\u5148\u8c03\u7528\u8fd9\u4e2a\u5143\u7d20\u7684hashCode\u65b9\u6cd5&#xff0c;\u5c31\u4e00\u4e0b\u5b50\u80fd\u5b9a\u4f4d\u5230\u5b83\u5e94\u8be5\u653e\u7f6e\u7684\u7269\u7406\u4f4d\u7f6e\u4e0a\u3002\u5982\u679c\u8fd9\u4e2a\u4f4d\u7f6e\u4e0a\u6ca1\u6709\u5143\u7d20&#xff0c;\u5b83\u5c31\u53ef\u4ee5\u76f4\u63a5\u5b58\u50a8\u5728\u8fd9\u4e2a\u4f4d\u7f6e\u4e0a&#xff0c;\u4e0d\u7528\u518d\u8fdb\u884c\u4efb\u4f55\u6bd4\u8f83\u4e86&#xff1b;\u5982\u679c\u8fd9\u4e2a\u4f4d\u7f6e\u4e0a\u5df2\u7ecf\u6709\u5143\u7d20\u4e86&#xff0c;\u5c31\u8c03\u7528\u5b83\u7684equals\u65b9\u6cd5\u4e0e\u65b0\u5143\u7d20\u8fdb\u884c\u6bd4\u8f83&#xff0c;\u76f8\u540c\u7684\u8bdd\u5c31\u4e0d\u5b58\u4e86&#xff0c;\u4e0d\u76f8\u540c\u5c31\u6563\u5217\u5176\u5b83\u7684\u5730\u5740\u3002\u8fd9\u6837\u4e00\u6765\u5b9e\u9645\u8c03\u7528equals\u65b9\u6cd5\u7684\u6b21\u6570\u5c31\u5927\u5927\u964d\u4f4e\u4e86&#xff0c;\u51e0\u4e4e\u53ea\u9700\u8981\u4e00\u4e24\u6b21\u3002<\/p>\n<\/p>\n<h4 id=\"7%E3%80%81%20String%E3%80%81StringBu%EF%AC%80er%20%E5%92%8C%20StringBuilder%20%E7%9A%84%E5%8C%BA%E5%88%AB%E6%98%AF%E4%BB%80%E4%B9%88%3F\">8\u3001\u00a0String\u3001StringBu\ufb00er\u00a0\u548c\u00a0StringBuilder\u00a0\u7684\u533a\u522b\u662f\u4ec0\u4e48?<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0String\u662f\u53ea\u8bfb\u5b57\u7b26\u4e32&#xff0c;\u5b83\u5e76\u4e0d\u662f\u57fa\u672c\u6570\u636e\u7c7b\u578b&#xff0c;\u800c\u662f\u4e00\u4e2a\u5bf9\u8c61\u3002\u4ece\u5e95\u5c42\u6e90\u7801\u6765\u770b\u662f\u4e00\u4e2a\ufb01nal\u7c7b\u578b\u7684 \u5b57\u7b26\u6570\u7ec4&#xff0c;\u6240\u5f15\u7528\u7684\u5b57\u7b26\u4e32\u4e0d\u80fd\u88ab\u6539\u53d8&#xff0c;\u4e00\u7ecf\u5b9a\u4e49&#xff0c;\u65e0\u6cd5\u518d\u589e\u5220\u6539\u3002\u6bcf\u6b21\u5bf9String\u7684\u64cd\u4f5c\u90fd\u4f1a\u751f\u6210 \u65b0\u7684String\u5bf9\u8c61\u3002<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0StringBuilder\u00a0\u548c\u00a0StringBuffer&#xff1a;\u90fd\u662f\u53ef\u53d8\u7684&#xff08;mutable&#xff09;\u3002\u5b83\u4eec\u53ef\u4ee5\u88ab\u591a\u6b21\u4fee\u6539&#xff0c;\u800c\u4e0d\u4f1a\u521b\u5efa\u65b0\u7684\u5bf9\u8c61.StringBuffer&#xff1a;\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u3002\u5b83\u63d0\u4f9b\u4e86\u540c\u6b65\u65b9\u6cd5&#xff0c;\u786e\u4fdd\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u5bf9\u5b57\u7b26\u4e32\u7684\u4fee\u6539\u662f\u5b89\u5168\u7684\u3002\u4f46\u662f&#xff0c;\u8fd9\u79cd\u540c\u6b65\u673a\u5236\u4f1a\u5e26\u6765\u6027\u80fd\u5f00\u9500\u3002StringBuilder&#xff1a;\u662f\u7ebf\u7a0b\u4e0d\u5b89\u5168\u7684\u3002\u5b83\u6ca1\u6709\u63d0\u4f9b\u540c\u6b65\u65b9\u6cd5&#xff0c;\u56e0\u6b64\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u4f7f\u7528\u65f6\u9700\u8981\u624b\u52a8\u540c\u6b65\u3002\u7531\u4e8e\u6ca1\u6709\u540c\u6b65\u5f00\u9500&#xff0c;StringBuilder\u5728\u5355\u7ebf\u7a0b\u73af\u5883\u4e0b\u7684\u6027\u80fd\u4f18\u4e8eStringBuffer\u3002<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u64cd\u4f5c\u5c11\u91cf\u5b57\u7b26\u6570\u636e\u7528 String&#xff1b;\u5355\u7ebf\u7a0b\u64cd\u4f5c\u5927\u91cf\u6570\u636e\u7528 StringBuilder&#xff1b;\u591a\u7ebf\u7a0b\u64cd\u4f5c\u5927\u91cf\u6570\u636e\u7528 StringBuffer\u3002<\/p>\n<\/p>\n<h4 id=\"8%E3%80%81ArrayList%E5%92%8ClinkedList%E7%9A%84%E5%8C%BA%E5%88%AB\">9\u3001ArrayList\u548clinkedList\u7684\u533a\u522b<\/h4>\n<p>ArrayList&#xff1a;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u57fa\u4e8e\u52a8\u6001\u6570\u7ec4\u5b9e\u73b0\u3002\u5e95\u5c42\u662f\u4e00\u4e2a\u6570\u7ec4&#xff0c;\u5f53\u6570\u7ec4\u6ee1\u4e86\u4e4b\u540e&#xff0c;\u4f1a\u81ea\u52a8\u6269\u5bb9&#xff0c;\u901a\u5e38\u6269\u5bb9\u4e3a\u539f\u6570\u7ec4\u7684 1.5 \u500d&#xff08;\u5177\u4f53\u6269\u5bb9\u7b56\u7565\u5728\u4e0d\u540c\u7248\u672c\u7684 JDK \u4e2d\u53ef\u80fd\u6709\u6240\u4e0d\u540c&#xff09;\u3002<\/p>\n<li>\n<p>ArrayList&lt;Integer&gt; list &#061; new ArrayList&lt;&gt;();<\/p>\n<\/li>\n<li>\n<p>list.add(1); \/\/ \u5e95\u5c42\u4f1a\u521b\u5efa\u4e00\u4e2a\u6570\u7ec4&#xff0c;\u5e76\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u4e2d<\/p>\n<\/li>\n<li>\n<p>list.add(2);<\/p>\n<\/li>\n<p>\u8fd0\u884c\u9879\u76ee\u5e76\u4e0b\u8f7d\u6e90\u7801<\/p>\n<p>LinkedList&#xff1a;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u57fa\u4e8e\u53cc\u5411\u94fe\u8868\u5b9e\u73b0\u3002\u6bcf\u4e2a\u5143\u7d20\u662f\u4e00\u4e2a\u8282\u70b9&#xff0c;\u6bcf\u4e2a\u8282\u70b9\u5305\u542b\u6570\u636e\u90e8\u5206\u548c\u6307\u5411\u524d\u540e\u8282\u70b9\u7684\u6307\u9488\u3002<\/p>\n<li>\n<p>LinkedList&lt;Integer&gt; list &#061; new LinkedList&lt;&gt;();<\/p>\n<\/li>\n<li>\n<p>list.add(1); \/\/ \u5e95\u5c42\u4f1a\u521b\u5efa\u4e00\u4e2a\u8282\u70b9&#xff0c;\u5e76\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u8282\u70b9\u4e2d<\/p>\n<\/li>\n<li>\n<p>list.add(2);<\/p>\n<\/li>\n<p>\u8fd0\u884c\u9879\u76ee\u5e76\u4e0b\u8f7d\u6e90\u7801<\/p>\n<\/p>\n<h4 id=\"9%E3%80%81%20HashMap%E5%92%8CHashTable%E7%9A%84%E5%8C%BA%E5%88%AB%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%20%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0\">10\u3001\u00a0HashMap\u548cHashTable\u7684\u533a\u522b\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/h4>\n<p>1\u3001\u4e24\u8005\u7236\u7c7b\u4e0d\u540c<\/p>\n<p>HashMap\u662f\u7ee7\u627f\u81eaAbstractMap\u7c7b&#xff0c;\u800cHashtable\u662f\u7ee7\u627f\u81eaDictionary\u7c7b\u3002\u4e0d\u8fc7\u5b83\u4eec\u90fd\u5b9e\u73b0\u4e86\u540c\u65f6 \u5b9e\u73b0\u4e86map\u3001Cloneable&#xff08;\u53ef\u590d\u5236&#xff09;\u3001\u00a0 Serializable&#xff08;\u53ef\u5e8f\u5217\u5316&#xff09;\u8fd9\u4e09\u4e2a\u63a5\u53e3\u3002<\/p>\n<p>2\u3001\u5bf9\u5916\u63d0\u4f9b\u7684\u63a5\u53e3\u4e0d\u540c<\/p>\n<p>Hashtable\u6bd4HashMap\u591a\u63d0\u4f9b\u4e86elments() \u548ccontains() \u4e24\u4e2a\u65b9\u6cd5\u3002\u00a0\u00a0 elments() \u65b9\u6cd5\u7ee7\u627f\u81ea Hashtable\u7684\u7236\u7c7bDictionnary\u3002elements() \u65b9\u6cd5\u7528\u4e8e\u8fd4\u56de\u6b64Hashtable\u4e2d\u7684value\u7684\u679a\u4e3e\u3002<\/p>\n<p>contains()\u65b9\u6cd5\u5224\u65ad\u8be5Hashtable\u662f\u5426\u5305\u542b\u4f20\u5165\u7684value\u3002\u5b83\u7684\u4f5c\u7528\u4e0econtainsValue()\u4e00\u81f4\u3002\u4e8b\u5b9e \u4e0a&#xff0c;contansValue() \u5c31\u53ea\u662f\u8c03\u7528\u4e86\u4e00\u4e0bcontains() \u65b9\u6cd5\u3002<\/p>\n<p>3\u3001\u5bf9null\u7684\u652f\u6301\u4e0d\u540c<\/p>\n<p>Hashtable&#xff1a;key\u548cvalue\u90fd\u4e0d\u80fd\u4e3anull\u3002<\/p>\n<p>HashMap &#xff1a;key\u53ef\u4ee5\u4e3anull&#xff0c;\u4f46\u662f\u8fd9\u6837\u7684key\u53ea\u80fd\u6709\u4e00\u4e2a&#xff0c;\u56e0\u4e3a\u5fc5\u987b\u4fdd\u8bc1key\u7684\u552f\u4e00\u6027&#xff1b;\u53ef\u4ee5\u6709\u591a\u4e2a key\u503c\u5bf9\u5e94\u7684value\u4e3anull\u3002<\/p>\n<p>4\u3001\u5b89\u5168\u6027\u4e0d\u540c<\/p>\n<p>HashMap\u662f\u7ebf\u7a0b\u4e0d\u5b89\u5168\u7684&#xff0c;\u5728\u591a\u7ebf\u7a0b\u5e76\u53d1\u7684\u73af\u5883\u4e0b&#xff0c;\u53ef\u80fd\u4f1a\u4ea7\u751f\u6b7b\u9501\u7b49\u95ee\u9898&#xff0c;\u56e0\u6b64\u9700\u8981\u5f00\u53d1\u4eba\u5458\u81ea \u5df1\u5904\u7406\u591a\u7ebf\u7a0b\u7684\u5b89\u5168\u95ee\u9898\u3002<\/p>\n<p>Hashtable\u662f\u7ebf\u7a0b\u5b89\u5168\u7684&#xff0c;\u5b83\u7684\u6bcf\u4e2a\u65b9\u6cd5\u4e0a\u90fd\u6709synchronized \u5173\u952e\u5b57&#xff0c;\u56e0\u6b64\u53ef\u76f4\u63a5\u7528\u4e8e\u591a\u7ebf\u7a0b\u4e2d\u3002<\/p>\n<p>\u867d\u7136HashMap\u662f\u7ebf\u7a0b\u4e0d\u5b89\u5168\u7684&#xff0c;\u4f46\u662f\u5b83\u7684\u6548\u7387\u8fdc\u8fdc\u9ad8\u4e8eHashtable&#xff0c;\u8fd9\u6837\u8bbe\u8ba1\u662f\u5408\u7406\u7684&#xff0c;\u56e0\u4e3a\u5927\u90e8 \u5206\u7684\u4f7f\u7528\u573a\u666f\u90fd\u662f\u5355\u7ebf\u7a0b\u3002\u5f53\u9700\u8981\u591a\u7ebf\u7a0b\u64cd\u4f5c\u7684\u65f6\u5019\u53ef\u4ee5\u4f7f\u7528\u7ebf\u7a0b\u5b89\u5168\u7684ConcurrentHashMap\u3002<\/p>\n<p>ConcurrentHashMap\u867d\u7136\u4e5f\u662f\u7ebf\u7a0b\u5b89\u5168\u7684&#xff0c;\u4f46\u662f\u5b83\u7684\u6548\u7387\u6bd4Hashtable\u8981\u9ad8\u597d\u591a\u500d\u3002\u56e0\u4e3a ConcurrentHashMap\u4f7f\u7528\u4e86\u5206\u6bb5\u9501&#xff0c;\u5e76\u4e0d\u5bf9\u6574\u4e2a\u6570\u636e\u8fdb\u884c\u9501\u5b9a\u3002<\/p>\n<p>5\u3001\u521d\u59cb\u5bb9\u91cf\u5927\u5c0f\u548c\u6bcf\u6b21\u6269\u5145\u5bb9\u91cf\u5927\u5c0f\u4e0d\u540c<\/p>\n<p>6\u3001\u8ba1\u7b97hash\u503c\u7684\u65b9\u6cd5\u4e0d\u540c<\/p>\n<\/p>\n<h4 id=\"10%E3%80%81%20Collection%E5%8C%85%E7%BB%93%E6%9E%84%EF%BC%8C%E4%B8%8ECollections%E7%9A%84%E5%8C%BA%E5%88%AB%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%20%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0%C2%A0\">11\u3001\u00a0Collection\u5305\u7ed3\u6784&#xff0c;\u4e0eCollections\u7684\u533a\u522b\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Collection\u662f\u96c6\u5408\u7c7b\u7684\u4e0a\u7ea7\u63a5\u53e3&#xff0c;\u5b50\u63a5\u53e3\u6709 Set\u3001 List\u3001 LinkedList\u3001ArrayList\u3001Vector\u3001Stack\u3001 Set&#xff1b; \u662f\u96c6\u5408\u7c7b\u7684\u4e00\u4e2a\u5e2e\u52a9\u7c7b&#xff0c;\u00a0 \u5b83\u5305\u542b\u6709\u5404\u79cd\u6709\u5173\u96c6\u5408\u64cd\u4f5c\u7684\u9759\u6001\u591a\u6001\u65b9\u6cd5&#xff0c;\u7528\u4e8e\u5b9e\u73b0\u5bf9\u5404\u79cd\u96c6\u5408\u7684\u641c\u7d22\u3001\u6392\u5e8f\u3001\u7ebf\u7a0b\u5b89\u5168\u5316\u7b49\u64cd\u4f5c\u3002\u6b64\u7c7b\u4e0d\u80fd\u5b9e\u4f8b\u5316&#xff0c;\u5c31\u50cf\u4e00\u4e2a\u5de5\u5177\u7c7b&#xff0c;\u670d\u52a1\u4e8eJava\u7684 Collection\u6846\u67b6\u3002<\/p>\n<\/p>\n<h4 id=\"11%E3%80%81%E6%B7%B1%E6%8B%B7%E8%B4%9D%E5%92%8C%E6%B5%85%E6%8B%B7%E8%B4%9D%E7%9A%84%E5%8C%BA%E5%88%AB%E6%98%AF%E4%BB%80%E4%B9%88%3F\">12\u3001\u6df1\u62f7\u8d1d\u548c\u6d45\u62f7\u8d1d\u7684\u533a\u522b\u662f\u4ec0\u4e48?<\/h4>\n<p>\u00a0 \u6d45\u62f7\u8d1d:\u88ab\u590d\u5236\u5bf9\u8c61\u7684\u6240\u6709\u53d8\u91cf\u90fd\u542b\u6709\u4e0e\u539f\u6765\u7684\u5bf9\u8c61\u76f8\u540c\u7684\u503c,\u800c\u6240\u6709\u7684\u5bf9\u5176\u4ed6\u5bf9\u8c61\u7684\u5f15\u7528\u4ecd\u7136\u6307 \u5411\u539f\u6765\u7684\u5bf9\u8c61.\u6362\u8a00\u4e4b,\u6d45\u62f7\u8d1d\u4ec5\u4ec5\u590d\u5236\u6240\u8003\u8651\u7684\u5bf9\u8c61,\u800c\u4e0d\u590d\u5236\u5b83\u6240\u5f15\u7528\u7684\u5bf9\u8c61.<\/p>\n<p>\u00a0 \u6df1\u62f7\u8d1d:\u88ab\u590d\u5236\u5bf9\u8c61\u7684\u6240\u6709\u53d8\u91cf\u90fd\u542b\u6709\u4e0e\u539f\u6765\u7684\u5bf9\u8c61\u76f8\u540c\u7684\u503c.\u800c\u90a3\u4e9b\u5f15\u7528\u5176\u4ed6\u5bf9\u8c61\u7684\u53d8\u91cf\u5c06\u6307\u5411 \u88ab\u590d\u5236\u8fc7\u7684\u65b0\u5bf9\u8c61.\u800c\u4e0d\u518d\u662f\u539f\u6709\u7684\u90a3\u4e9b\u88ab\u5f15\u7528\u7684\u5bf9\u8c61.\u6362\u8a00\u4e4b.\u6df1\u62f7\u8d1d\u628a\u8981\u590d\u5236\u7684\u5bf9\u8c61\u6240\u5f15\u7528\u7684\u00a0\u00a0 \u5bf9\u8c61\u90fd\u590d\u5236\u4e86\u4e00\u904d.<\/p>\n<\/p>\n<h4 id=\"12%E3%80%81%EF%AC%81nal%E6%9C%89%E5%93%AA%E4%BA%9B%E7%94%A8%E6%B3%95%3F\">13\u3001\ufb01nal\u6709\u54ea\u4e9b\u7528\u6cd5?<\/h4>\n<p>\ufb01nal\u4e5f\u662f\u5f88\u591a\u9762\u8bd5\u559c\u6b22\u95ee\u7684\u5730\u65b9,\u4f46\u6211\u89c9\u5f97\u8fd9\u4e2a\u95ee\u9898\u5f88\u65e0\u804a,\u901a\u5e38\u80fd\u56de\u7b54\u4e0b\u4ee5\u4e0b5\u70b9\u5c31\u4e0d\u9519\u4e86:<\/p>\n<p>\u00a0 \u88ab\ufb01nal\u4fee\u9970\u7684\u7c7b\u4e0d\u53ef\u4ee5\u88ab\u7ee7\u627f<\/p>\n<p>\u00a0 \u88ab\ufb01nal\u4fee\u9970\u7684\u65b9\u6cd5\u4e0d\u53ef\u4ee5\u88ab\u91cd\u5199<\/p>\n<p>\u00a0 \u88ab\ufb01nal\u4fee\u9970\u7684\u53d8\u91cf\u4e0d\u53ef\u4ee5\u88ab\u6539\u53d8.\u5982\u679c\u4fee\u9970\u5f15\u7528,\u90a3\u4e48\u8868\u793a\u5f15\u7528\u4e0d\u53ef\u53d8,\u5f15\u7528\u6307\u5411\u7684\u5185\u5bb9\u53ef\u53d8.<\/p>\n<p>\u00a0\u00a0\u88ab\ufb01nal\u4fee\u9970\u7684\u65b9\u6cd5,JVM\u4f1a\u5c1d\u8bd5\u5c06\u5176\u5185\u8054,\u4ee5\u63d0\u9ad8\u8fd0\u884c\u6548\u7387<\/p>\n<p>\u00a0 \u88ab\ufb01nal\u4fee\u9970\u7684\u5e38\u91cf,\u5728\u7f16\u8bd1\u9636\u6bb5\u4f1a\u5b58\u5165\u5e38\u91cf\u6c60\u4e2d.<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9664\u6b64\u4e4b\u5916,\u7f16\u8bd1\u5668\u5bf9\ufb01nal\u57df\u8981\u9075\u5b88\u7684\u4e24\u4e2a\u91cd\u6392\u5e8f\u89c4\u5219\u66f4\u597d:\u5728\u6784\u9020\u51fd\u6570\u5185\u5bf9\u4e00\u4e2a\ufb01nal\u57df\u7684\u5199\u5165,\u4e0e\u968f\u540e\u628a\u8fd9\u4e2a\u88ab\u6784\u9020\u5bf9\u8c61\u7684\u5f15\u7528\u8d4b\u503c\u7ed9\u4e00\u4e2a\u5f15\u7528\u53d8\u91cf,\u8fd9\u4e24\u4e2a\u64cd\u4f5c\u4e4b\u95f4\u4e0d\u80fd\u91cd\u6392\u5e8f \u521d\u6b21\u8bfb\u4e00\u4e2a\u5305\u542b\ufb01nal\u57df\u7684\u5bf9\u8c61\u7684\u5f15\u7528,\u4e0e\u968f\u540e\u521d\u6b21\u8bfb\u8fd9\u4e2a\ufb01nal\u57df,\u8fd9\u4e24\u4e2a\u64cd\u4f5c\u4e4b\u95f4\u4e0d\u80fd\u91cd\u6392\u5e8f.<\/p>\n<\/p>\n<h4 id=\"13%E3%80%81%20static%E9%83%BD%E6%9C%89%E5%93%AA%E4%BA%9B%E7%94%A8%E6%B3%95%3F\">14\u3001\u00a0static\u90fd\u6709\u54ea\u4e9b\u7528\u6cd5?<\/h4>\n<p>\u6240\u6709\u7684\u4eba\u90fd\u77e5\u9053static\u5173\u952e\u5b57\u8fd9\u4e24\u4e2a\u57fa\u672c\u7684\u7528\u6cd5&#xff1a;\u9759\u6001\u53d8\u91cf\u548c\u9759\u6001\u65b9\u6cd5.\u4e5f\u5c31\u662f\u88abstatic\u6240\u4fee\u9970\u7684\u53d8\u91cf\/ \u65b9\u6cd5\u90fd\u5c5e\u4e8e\u7c7b\u7684\u9759\u6001\u8d44\u6e90,\u7c7b\u5b9e\u4f8b\u6240\u5171\u4eab.<\/p>\n<p>\u9664\u4e86\u9759\u6001\u53d8\u91cf\u548c\u9759\u6001\u65b9\u6cd5\u4e4b\u5916,static\u4e5f\u7528\u4e8e\u9759\u6001\u5757,\u591a\u7528\u4e8e\u521d\u59cb\u5316\u64cd\u4f5c:<\/p>\n<table border=\"1\" cellspacing=\"0\">\n<tbody>\n<tr>\n<td>\n<p>public calss PreCache{<\/p>\n<p>static{<\/p>\n<p>\/\/\u6267\u884c\u76f8\u5173\u64cd\u4f5c<\/p>\n<p>}<\/p>\n<p>}<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6b64\u5916static\u4e5f\u591a\u7528\u4e8e\u4fee\u9970\u5185\u90e8\u7c7b,\u6b64\u65f6\u79f0\u4e4b\u4e3a\u9759\u6001\u5185\u90e8\u7c7b.<\/p>\n<p>\u6700\u540e\u4e00\u79cd\u7528\u6cd5\u5c31\u662f\u9759\u6001\u5bfc\u5305,\u5373 import static .import static\u662f\u5728JDK 1.5\u4e4b\u540e\u5f15\u5165\u7684\u65b0\u7279\u6027,\u53ef\u4ee5\u7528\u6765\u6307\u5b9a\u5bfc\u5165\u67d0\u4e2a\u7c7b\u4e2d\u7684\u9759\u6001\u8d44\u6e90,\u5e76\u4e14\u4e0d\u9700\u8981\u4f7f\u7528\u7c7b\u540d,\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u8d44\u6e90\u540d\u3002<\/p>\n<\/p>\n<h4 id=\"14%E3%80%81try%20catch%20%EF%AC%81nally%20%EF%BC%8Ctry%E9%87%8C%E6%9C%89return%20%EF%BC%8C%EF%AC%81nally%E8%BF%98%E6%89%A7%E8%A1%8C%E4%B9%88%EF%BC%9F\">15\u3001try catch \ufb01nally\u00a0&#xff0c;try\u91cc\u6709return\u00a0&#xff0c;\ufb01nally\u8fd8\u6267\u884c\u4e48&#xff1f;<\/h4>\n<p>\u6267\u884c&#xff0c;\u5e76\u4e14\ufb01nally\u7684\u6267\u884c\u65e9\u4e8etry\u91cc\u9762\u7684return<\/p>\n<p>\u7ed3\u8bba&#xff1a;<\/p>\n<p>1\u3001\u4e0d\u7ba1\u6709\u6728\u6709\u51fa\u73b0\u5f02\u5e38&#xff0c;\ufb01nally\u5757\u4e2d\u4ee3\u7801\u90fd\u4f1a\u6267\u884c&#xff1b;<\/p>\n<p>2\u3001\u5f53try\u548ccatch\u4e2d\u6709return\u65f6&#xff0c;\ufb01nally\u4ecd\u7136\u4f1a\u6267\u884c&#xff1b;<\/p>\n<p>3\u3001\ufb01nally\u662f\u5728return\u540e\u9762\u7684\u8868\u8fbe\u5f0f\u8fd0\u7b97\u540e\u6267\u884c\u7684&#xff08;\u6b64\u65f6\u5e76\u6ca1\u6709\u8fd4\u56de\u8fd0\u7b97\u540e\u7684\u503c&#xff0c;\u800c\u662f\u5148\u628a\u8981\u8fd4\u56de\u7684 \u503c\u4fdd\u5b58\u8d77\u6765&#xff0c;\u7ba1\ufb01nally\u4e2d\u7684\u4ee3\u7801\u600e\u4e48\u6837&#xff0c;\u8fd4\u56de\u7684\u503c\u90fd\u4e0d\u4f1a\u6539\u53d8&#xff0c;\u4efb\u7136\u662f\u4e4b\u524d\u4fdd\u5b58\u7684\u503c&#xff09;&#xff0c;\u6240\u4ee5\u51fd\u6570\u00a0\u00a0 \u8fd4\u56de\u503c\u662f\u5728\ufb01nally\u6267\u884c\u524d\u786e\u5b9a\u7684&#xff1b;<\/p>\n<p>4\u3001\ufb01nally\u4e2d\u6700\u597d\u4e0d\u8981\u5305\u542breturn&#xff0c;\u5426\u5219\u7a0b\u5e8f\u4f1a\u63d0\u524d\u9000\u51fa&#xff0c;\u8fd4\u56de\u503c\u4e0d\u662ftry\u6216catch\u4e2d\u4fdd\u5b58\u7684\u8fd4\u56de\u503c\u3002<\/p>\n<\/p>\n<h4 id=\"15.%E5%A4%9A%E6%80%81%E7%9A%84%E4%BD%9C%E7%94%A8\">16\u3001\u591a\u6001\u7684\u4f5c\u7528<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u591a\u6001\u7684\u5b9e\u73b0\u8981\u6709\u7ee7\u627f\u3001\u91cd\u5199&#xff0c;\u7236\u7c7b\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61\u3002\u5b83\u7684\u597d\u5904\u662f\u53ef\u4ee5\u6d88\u9664\u7c7b\u578b\u4e4b\u95f4\u7684\u8026\u5408\u5173\u7cfb&#xff0c;\u589e\u52a0\u7c7b\u7684\u53ef\u6269\u5145\u6027\u548c\u7075\u6d3b\u6027\u3002<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u591a\u6001\u5141\u8bb8\u4f60\u901a\u8fc7\u7edf\u4e00\u7684\u63a5\u53e3\u6765\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u5bf9\u8c61&#xff0c;\u8fd9\u6837\u5728\u6dfb\u52a0\u65b0\u7684\u7c7b\u578b\u65f6&#xff0c;\u4e0d\u9700\u8981\u4fee\u6539\u73b0\u6709\u7684\u4ee3\u7801&#xff0c;\u53ea\u9700\u8981\u5b9e\u73b0\u76f8\u540c\u7684\u63a5\u53e3\u6216\u7ee7\u627f\u76f8\u540c\u7684\u7236\u7c7b\u5373\u53ef\u3002\u8fd9\u4f7f\u5f97\u4ee3\u7801\u7684\u6269\u5c55\u6027\u5927\u5927\u589e\u5f3a\u3002<\/p>\n<\/p>\n<h4 id=\"16.%E4%BB%80%E4%B9%88%E6%98%AF%E5%8F%8D%E5%B0%84%EF%BC%9F\">17\u3001\u4ec0\u4e48\u662f\u53cd\u5c04&#xff1f;<\/h4>\n<p>\u00a0 \u00a0 \u00a0\u00a0\u00a0<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53cd\u5c04\u673a\u5236\u662f\u5728\u8fd0\u884c\u65f6&#xff0c;\u5bf9\u4e8e\u4efb\u610f\u4e00\u4e2a\u7c7b&#xff0c;\u90fd\u80fd\u591f\u77e5\u9053\u8fd9\u4e2a\u7c7b\u7684\u6240\u6709\u5c5e\u6027\u548c\u65b9\u6cd5&#xff1b;\u5bf9\u4e8e\u4efb\u610f\u4e2a\u5bf9\u8c61&#xff0c;\u00a0\u90fd\u80fd\u591f\u8c03\u7528\u5b83\u7684\u4efb\u610f\u4e00\u4e2a\u65b9\u6cd5\u3002\u5728java\u4e2d&#xff0c;\u53ea\u8981\u7ed9\u5b9a\u7c7b\u7684\u540d\u5b57&#xff0c;\u5c31\u53ef\u4ee5\u901a\u8fc7\u53cd\u5c04\u673a\u5236\u6765\u83b7\u5f97\u7c7b\u7684\u6240 \u6709\u4fe1\u606f\u3002<\/p>\n<p>I\u00a0\u00a0 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\u51e0\u4e2a\u65b9\u9762\u53bb\u56de\u7b54&#xff1a;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Java \u96c6\u5408\u6846\u67b6\u4e2d\u7684\u4e00\u79cd\u5b58\u653e\u76f8\u540c\u7c7b\u578b\u7684\u5143\u7d20\u6570\u636e&#xff0c;\u662f\u4e00\u79cd\u53d8\u957f\u7684\u96c6\u5408\u7c7b&#xff0c;\u57fa\u4e8e\u5b9a\u957f\u6570\u7ec4\u5b9e\u73b0&#xff0c;\u5f53\u52a0\u5165\u6570\u636e\u8fbe\u5230\u4e00\u5b9a\u7a0b\u5ea6\u540e&#xff0c;\u4f1a\u5b9e\u884c\u81ea\u52a8\u6269\u5bb9&#xff0c;\u5373\u6269\u5927\u6570\u7ec4\u5927\u5c0f\u3002\u5e95\u5c42\u662f\u4f7f\u7528\u6570\u7ec4\u5b9e\u73b0&#xff0c;\u6dfb\u52a0\u5143\u7d20\u3002<\/p>\n<p>\u5982\u679c add(o)&#xff0c;\u6dfb\u52a0\u5230\u7684\u662f\u6570\u7ec4\u7684\u5c3e\u90e8&#xff0c;\u5982\u679c\u8981\u589e\u52a0\u7684\u6570\u636e\u91cf\u5f88\u5927&#xff0c;\u5e94\u8be5\u4f7f\u7528ensureCapacity() \u65b9\u6cd5&#xff0c;\u8be5\u65b9\u6cd5\u7684\u4f5c\u7528\u662f\u9884\u5148\u8bbe\u7f6e ArrayList \u7684\u5927\u5c0f&#xff0c;\u8fd9\u6837\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u521d\u59cb\u5316\u901f\u5ea6\u3002<\/p>\n<p>\u5982\u679c\u4f7f\u7528 add(int,o)&#xff0c;\u6dfb\u52a0\u5230\u67d0\u4e2a\u4f4d\u7f6e&#xff0c;\u90a3\u4e48\u53ef\u80fd\u4f1a\u632a\u52a8\u5927\u91cf\u7684\u6570\u7ec4\u5143\u7d20&#xff0c;\u5e76\u4e14\u53ef\u80fd\u4f1a\u89e6\u53d1\u6269 \u5bb9\u673a\u5236\u3002<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u9ad8\u5e76\u53d1\u7684\u60c5\u51b5\u4e0b&#xff0c;\u7ebf\u7a0b\u4e0d\u5b89\u5168\u3002\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u64cd\u4f5c ArrayList &#xff0c;\u4f1a\u5f15\u53d1\u4e0d\u53ef\u9884\u77e5\u7684\u5f02\u5e38\u6216\u9519\u8bef\u3002ArrayList \u5b9e\u73b0\u4e86 Cloneable \u63a5\u53e3&#xff0c;\u6807\u8bc6\u7740\u5b83\u53ef\u4ee5\u88ab\u590d\u5236\u3002\u6ce8\u610f&#xff1a;ArrayList \u91cc\u9762\u7684 clone() \u590d\u5236\u5176\u5b9e\u662f\u6d45\u590d\u5236\u3002<\/p>\n<\/p>\n<h4 id=\"20%E3%80%81%E6%9C%89%E6%95%B0%E7%BB%84%E4%BA%86%E4%B8%BA%E4%BB%80%E4%B9%88%E8%BF%98%E8%A6%81%E6%90%9E%E4%B8%AA%20ArrayList%20%E5%91%A2%EF%BC%9F\">21\u3001\u6709\u6570\u7ec4\u4e86\u4e3a\u4ec0\u4e48\u8fd8\u8981\u641e\u4e2a\u00a0ArrayList\u00a0\u5462&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u901a\u5e38\u6211\u4eec\u5728\u4f7f\u7528\u7684\u65f6\u5019&#xff0c;\u5982\u679c\u5728\u4e0d\u660e\u786e\u8981\u63d2\u5165\u591a\u5c11\u6570\u636e\u7684\u60c5\u51b5\u4e0b&#xff0c;\u666e\u901a\u6570\u7ec4\u5c31\u5f88\u5c34\u5c2c\u4e86&#xff0c;\u56e0\u4e3a\u4f60\u4e0d\u77e5\u9053\u9700\u8981\u521d\u59cb\u5316\u6570\u7ec4\u5927\u5c0f\u4e3a\u591a\u5c11&#xff0c;\u800c ArrayList \u53ef\u4ee5\u4f7f\u7528\u9ed8\u8ba4\u7684\u5927\u5c0f&#xff0c;\u5f53\u5143\u7d20\u4e2a\u6570\u5230\u8fbe\u4e00\u5b9a\u7a0b\u5ea6\u540e&#xff0c;\u4f1a\u81ea\u52a8\u6269\u5bb9\u3002<\/p>\n<p>\u53ef\u4ee5\u8fd9\u4e48\u6765\u7406\u89e3&#xff1a;\u6211\u4eec\u5e38\u8bf4\u7684\u6570\u7ec4\u662f\u5b9a\u6b7b\u7684\u6570\u7ec4&#xff0c;ArrayList \u5374\u662f\u52a8\u6001\u6570\u7ec4\u3002<\/p>\n<\/p>\n<h4 id=\"21%E3%80%81%E8%AF%B4%E8%AF%B4Hashtable%20%E4%B8%8E%20HashMap%20%E7%9A%84%E5%8C%BA%E5%88%AB\">22\u3001\u8bf4\u8bf4Hashtable\u00a0\u4e0e\u00a0HashMap\u00a0\u7684\u533a\u522b<\/h4>\n<p>\u672c\u6765\u4e0d\u60f3\u8fd9\u4e48\u5199\u6807\u9898\u7684&#xff0c;\u4f46\u662f\u65e0\u5948&#xff0c;\u9762\u8bd5\u5b98\u90fd\u559c\u6b22\u8fd9\u4e48\u95ee HashMap\u3002<\/p>\n<p>1. \u51fa\u751f\u7684\u7248\u672c\u4e0d\u4e00\u6837&#xff0c;Hashtable \u51fa\u751f\u4e8e Java \u53d1\u5e03\u7684\u7b2c\u4e00\u7248\u672c JDK 1.0 &#xff0c;HashMap \u51fa\u751f\u4e8e JDK 1.2\u3002<\/p>\n<p>2. \u90fd\u5b9e\u73b0\u4e86 Map\u3001Cloneable\u3001Serializable&#xff08;\u5f53\u524d JDK \u7248\u672c 1.8 &#xff09;\u3002<\/p>\n<p>3. HashMap \u7ee7\u627f\u7684\u662f AbstractMap&#xff0c;\u5e76\u4e14 AbstractMap \u4e5f\u5b9e\u73b0\u4e86 Map \u63a5\u53e3\u3002 Hashtable \u7ee7\u627f<\/p>\n<p>Dictionary\u3002<\/p>\n<p>4. Hashtable \u4e2d\u5927\u90e8\u5206 public \u4fee\u9970\u666e\u901a\u65b9\u6cd5\u90fd\u662f synchronized \u5b57\u6bb5\u4fee\u9970\u7684&#xff0c;\u662f\u7ebf\u7a0b\u5b89\u5168\u7684&#xff0c; HashMap \u662f\u975e\u7ebf\u7a0b\u5b89\u5168\u7684\u3002<\/p>\n<p>5. Hashtable \u7684 key \u4e0d\u80fd\u4e3a null &#xff0c;value \u4e5f\u4e0d\u80fd\u4e3a null&#xff0c;\u8fd9\u4e2a\u53ef\u4ee5\u4ece Hashtable \u6e90\u7801\u4e2d\u7684 put \u65b9 \u6cd5\u770b\u5230&#xff0c;\u5224\u65ad\u5982\u679c value \u4e3a null \u5c31\u76f4\u63a5\u629b\u51fa\u7a7a\u6307\u9488\u5f02\u5e38&#xff0c;\u5728 put \u65b9\u6cd5\u4e2d\u8ba1\u7b97 key \u7684 hash \u503c\u4e4b \u524d\u5e76\u6ca1\u6709\u5224\u65ad key \u4e3a null \u7684\u60c5\u51b5&#xff0c;\u90a3\u8bf4\u660e&#xff0c;\u8fd9\u65f6\u5019\u5982\u679c key \u4e3a\u7a7a&#xff0c;\u7167\u6837\u4f1a\u629b\u51fa\u7a7a\u6307\u9488\u5f02\u5e38\u3002<\/p>\n<p>6. HashMap \u7684 key \u548c value \u90fd\u53ef\u4ee5\u4e3a null\u3002\u5728\u8ba1\u7b97 hash \u503c\u7684\u65f6\u5019&#xff0c;\u6709\u5224\u65ad&#xff0c;\u5982\u679c key&#061;&#061;null \u00a0&#xff0c;\u5219\u5176\u00a0 hash&#061;0 &#xff1b;\u81f3\u4e8e value \u662f\u5426\u4e3a null &#xff0c;\u6839\u672c\u6ca1\u6709\u5224\u65ad\u8fc7\u3002<\/p>\n<p>7. Hashtable \u76f4\u63a5\u4f7f\u7528\u5bf9\u8c61\u7684 hash \u503c\u3002hash \u503c\u662f JDK \u6839\u636e\u5bf9\u8c61\u7684\u5730\u5740\u6216\u8005\u5b57\u7b26\u4e32\u6216\u8005\u6570\u5b57\u7b97\u51fa \u6765\u7684 int \u7c7b\u578b\u7684\u6570\u503c\u3002\u7136\u540e\u518d\u4f7f\u7528\u9664\u7559\u4f59\u6570\u6cd5\u6765\u83b7\u5f97\u6700\u7ec8\u7684\u4f4d\u7f6e\u3002\u7136\u800c\u9664\u6cd5\u8fd0\u7b97\u662f\u975e\u5e38\u8017\u8d39\u65f6\u00a0\u00a0 \u95f4\u7684&#xff0c;\u6548\u7387\u5f88\u4f4e\u3002\u00a0 HashMap \u4e3a\u4e86\u63d0\u9ad8\u8ba1\u7b97\u6548\u7387&#xff0c;\u5c06\u54c8\u5e0c\u8868\u7684\u5927\u5c0f\u56fa\u5b9a\u4e3a\u4e86 2 \u7684\u5e42&#xff0c;\u8fd9\u6837\u5728\u53d6\u00a0\u00a0 \u6a21\u9884\u7b97\u65f6&#xff0c;\u4e0d\u9700\u8981\u505a\u9664\u6cd5&#xff0c;\u53ea\u9700\u8981\u505a\u4f4d\u8fd0\u7b97\u3002\u4f4d\u8fd0\u7b97\u6bd4\u9664\u6cd5\u7684\u6548\u7387\u8981\u9ad8\u5f88\u591a\u3002<\/p>\n<p>8. Hashtable\u3001 HashMap \u90fd\u4f7f\u7528\u4e86 Iterator\u3002\u800c\u7531\u4e8e\u5386\u53f2\u539f\u56e0&#xff0c;Hashtable \u8fd8\u4f7f\u7528\u4e86 Enumeration \u7684\u65b9\u5f0f\u3002<\/p>\n<p>9. \u9ed8\u8ba4\u60c5\u51b5\u4e0b&#xff0c;\u521d\u59cb\u5bb9\u91cf\u4e0d\u540c&#xff0c;Hashtable \u7684\u521d\u59cb\u957f\u5ea6\u662f 11&#xff0c;\u4e4b\u540e\u6bcf\u6b21\u6269\u5145\u5bb9\u91cf\u53d8\u4e3a\u4e4b\u524d\u7684\u00a0\u00a0\u00a0 2n&#043;1&#xff08; n \u4e3a\u4e0a\u4e00\u6b21\u7684\u957f\u5ea6&#xff09;\u800c HashMap \u7684\u521d\u59cb\u957f\u5ea6\u4e3a 16 &#xff0c;\u4e4b\u540e\u6bcf\u6b21\u6269\u5145\u53d8\u4e3a\u539f\u6765\u7684\u4e24\u500d\u3002<\/p>\n<p>\u00a0\u7bc7\u5e45\u9650\u5236\u4e0b\u9762\u5c31\u53ea\u80fd\u7ed9\u5927\u5bb6\u5c55\u793a\u5c0f\u518c\u90e8\u5206\u5185\u5bb9\u4e86\u3002\u6574\u7406\u4e86\u4e00\u4efd\u6838\u5fc3\u9762\u8bd5\u7b14\u8bb0\u5305\u62ec\u4e86&#xff1a;Java\u9762\u8bd5\u3001Spring\u3001JVM\u3001MyBatis\u3001Redis\u3001MySQL\u3001\u5e76\u53d1\u7f16\u7a0b\u3001\u5fae\u670d\u52a1\u3001Linux\u3001Springboot\u3001SpringCloud\u3001MQ\u3001Kafc<\/p>\n<p>\u9700\u8981\u5168\u5957\u9762\u8bd5\u7b14\u8bb0\u53ca\u7b54\u6848<span class=\"link-card-box\"><span class=\"link-title\">\u3010\u70b9\u51fb\u6b64\u5904\u5373\u53ef\/\u514d\u8d39\u83b7\u53d6\u3011<\/span><span class=\"link-link\"><img decoding=\"async\" class=\"link-link-icon\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260208064934-698831fe84504.png\" \/>https:\/\/docs.qq.com\/doc\/DQXdYWE9LZ2ZHZ1ho<\/span><\/span><\/p>\n<\/p>\n<h4 id=\"22%E3%80%81%E7%BA%A2%E9%BB%91%E6%A0%91%E6%9C%89%E5%93%AA%E5%87%A0%E4%B8%AA%E7%89%B9%E5%BE%81%EF%BC%9F\">23\u3001\u7ea2\u9ed1\u6811\u6709\u54ea\u51e0\u4e2a\u7279\u5f81&#xff1f;<\/h4>\n<p>\u7d27\u63a5\u4e0a\u4e2a\u95ee\u9898&#xff0c;\u9762\u8bd5\u5b98\u5f88\u6709\u53ef\u80fd\u4f1a\u95ee\u7ea2\u9ed1\u6811&#xff0c;\u4e0b\u9762\u628a\u7ea2\u9ed1\u6811\u7684\u51e0\u4e2a\u7279\u5f81\u5217\u51fa\u6765&#xff1a;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"438\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260208064934-698831fea42b2.png\" width=\"1021\" \/><\/p>\n<\/p>\n<h4 id=\"23%E3%80%81%E8%AF%B4%E8%AF%B4%E4%BD%A0%E5%B9%B3%E6%97%B6%E6%98%AF%E6%80%8E%E4%B9%88%E5%A4%84%E7%90%86%20Java%20%E5%BC%82%E5%B8%B8%E7%9A%84\">24\u3001\u8bf4\u8bf4\u4f60\u5e73\u65f6\u662f\u600e\u4e48\u5904\u7406\u00a0Java\u00a0\u5f02\u5e38\u7684<\/h4>\n<p>try-catch-\ufb01nally<\/p>\n<p>\u00a0\u00a0try \u5757\u8d1f\u8d23\u76d1\u63a7\u53ef\u80fd\u51fa\u73b0\u5f02\u5e38\u7684\u4ee3\u7801<\/p>\n<p>\u00a0\u00a0 catch \u5757\u8d1f\u8d23\u6355\u83b7\u53ef\u80fd\u51fa\u73b0\u7684\u5f02\u5e38&#xff0c;\u5e76\u8fdb\u884c\u5904\u7406<\/p>\n<p>\u00a0 \ufb01nally \u5757\u8d1f\u8d23\u6e05\u7406\u5404\u79cd\u8d44\u6e90&#xff0c;\u4e0d\u7ba1\u662f\u5426\u51fa\u73b0\u5f02\u5e38\u90fd\u4f1a\u6267\u884c<\/p>\n<p>\u00a0 \u5176\u4e2d try \u5757\u662f\u5fc5\u987b\u7684&#xff0c;catch \u548c \ufb01nally \u81f3\u5c11\u5b58\u5728\u4e00\u4e2a\u6807\u51c6\u5f02\u5e38\u5904\u7406\u6d41\u7a0b<\/p>\n<\/p>\n<h3 id=\"%E4%BA%8C%E3%80%81JVM%E7%AF%87\">\u4e8c\u3001JVM\u7bc7<\/h3>\n<\/p>\n<h4 id=\"1%E3%80%81%E7%9F%A5%E8%AF%86%E7%82%B9%E6%B1%87%E6%80%BB\">1\u3001\u77e5\u8bc6\u70b9\u6c47\u603b<\/h4>\n<p>JVM\u662fJava\u8fd0\u884c\u57fa\u7840,\u9762\u8bd5\u65f6\u4e00\u5b9a\u4f1a\u9047\u5230JVM\u7684\u6709\u5173\u95ee\u9898,\u5185\u5bb9\u76f8\u5bf9\u96c6\u4e2d,\u4f46\u5bf9\u53ea\u662f\u6df1\u5ea6\u8981\u6c42\u8f83\u9ad8.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"813\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260208064934-698831fed30b6.png\" width=\"1021\" \/><\/p>\n<p>\u5176\u4e2d\u5185\u5b58\u6a21\u578b,\u7c7b\u52a0\u8f7d\u673a\u5236,GC\u662f\u91cd\u70b9\u65b9\u9762.\u6027\u80fd\u8c03\u4f18\u90e8\u5206\u66f4\u504f\u5411\u5e94\u7528,\u91cd\u70b9\u7a81\u51fa\u5b9e\u8df5\u80fd\u529b.\u7f16\u8bd1\u5668\u4f18\u5316<\/p>\n<p>\u548c\u6267\u884c\u6a21\u5f0f\u90e8\u5206\u504f\u5411\u4e8e\u7406\u8bba\u57fa\u7840,\u91cd\u70b9\u638c\u63e1\u77e5\u8bc6\u70b9.<\/p>\n<p>\u9700\u4e86\u89e3\u00a0\u5185\u5b58\u6a21\u578b\u5404\u90e8\u5206\u4f5c\u7528,\u4fdd\u5b58\u54ea\u4e9b\u6570\u636e.<\/p>\n<p>\u7c7b\u52a0\u8f7d\u53cc\u4eb2\u59d4\u6d3e\u52a0\u8f7d\u673a\u5236,\u5e38\u7528\u52a0\u8f7d\u5668\u5206\u522b\u52a0\u8f7d\u54ea\u79cd\u7c7b\u578b\u7684\u7c7b.<\/p>\n<p>GC\u5206\u4ee3\u56de\u6536\u7684\u601d\u60f3\u548c\u4f9d\u636e\u4ee5\u53ca\u4e0d\u540c\u5783\u573e\u56de\u6536\u7b97\u6cd5\u7684\u56de\u6536\u601d\u8def\u548c\u9002\u5408\u573a\u666f.<\/p>\n<p>\u6027\u80fd\u8c03\u4f18\u5e38\u6709JVM\u4f18\u5316\u53c2\u6570\u4f5c\u7528,\u53c2\u6570\u8c03\u4f18\u7684\u4f9d\u636e,\u5e38\u7528\u7684JVM\u5206\u6790\u5de5\u5177\u80fd\u5206\u6790\u54ea\u4e9b\u95ee\u9898\u4ee5\u53ca\u4f7f\u7528\u65b9\u6cd5.<\/p>\n<p>\u6267\u884c\u6a21\u5f0f\u89e3\u91ca\/\u7f16\u8bd1\/\u6df7\u5408\u6a21\u5f0f\u7684\u4f18\u7f3a\u70b9,Java7\u63d0\u4f9b\u7684\u5206\u5c42\u7f16\u8bd1\u6280\u672f,JIT\u5373\u65f6\u7f16\u8bd1\u6280\u672f,OSR\u6808\u4e0a\u66ff<\/p>\n<p>\u6362,C1\/C2\u7f16\u8bd1\u5668\u9488\u5bf9\u7684\u573a\u666f,C2\u9488\u5bf9\u7684\u662fserver\u6a21\u5f0f,\u4f18\u5316\u66f4\u6fc0\u8fdb.\u65b0\u6280\u672f\u65b9\u9762Java10\u7684graal\u7f16\u8bd1\u5668<\/p>\n<p>\u7f16\u8bd1\u5668\u4f18\u5316javac\u7684\u7f16\u8bd1\u8fc7\u7a0b,ast\u62bd\u8c61\u8bed\u6cd5\u6811,\u7f16\u8bd1\u5668\u4f18\u5316\u548c\u8fd0\u884c\u5668\u4f18\u5316.<\/p>\n<\/p>\n<h4 id=\"2%E3%80%81%E7%9F%A5%E8%AF%86%E7%82%B9%E8%AF%A6%E8%A7%A3%EF%BC%9A\">2\u3001\u77e5\u8bc6\u70b9\u8be6\u89e3&#xff1a;<\/h4>\n<p>1\u3001JVM\u5185\u5b58\u6a21\u578b&#xff1a;<\/p>\n<p>\u7ebf\u7a0b\u72ec\u5360:\u6808,\u672c\u5730\u65b9\u6cd5\u6808,\u7a0b\u5e8f\u8ba1\u6570\u5668 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\u533a\u57df\u4e0d\u8fde\u7eed&#xff0c;\u4f1a\u6709\u788e\u7247\u3002<\/p>\n<p>1\u3001\u529f\u80fd\u4e0d\u540c<\/p>\n<p>\u6808\u5185\u5b58\u7528\u6765\u5b58\u50a8\u5c40\u90e8\u53d8\u91cf\u548c\u65b9\u6cd5\u8c03\u7528&#xff0c;\u800c\u5806\u5185\u5b58\u7528\u6765\u5b58\u50a8Java\u4e2d\u7684\u5bf9\u8c61\u3002\u65e0\u8bba\u662f\u6210\u5458\u53d8\u91cf&#xff0c;\u5c40\u90e8\u53d8\u00a0\u91cf&#xff0c;\u8fd8\u662f\u7c7b\u53d8\u91cf&#xff0c;\u5b83\u4eec\u6307\u5411\u7684\u5bf9\u8c61\u90fd\u5b58\u50a8\u5728\u5806\u5185\u5b58\u4e2d\u3002<\/p>\n<p>2\u3001\u5171\u4eab\u6027\u4e0d\u540c<\/p>\n<p>\u6808\u5185\u5b58\u662f\u7ebf\u7a0b\u79c1\u6709\u7684\u3002\u00a0\u00a0 \u5806\u5185\u5b58\u662f\u6240\u6709\u7ebf\u7a0b\u5171\u6709\u7684\u3002<\/p>\n<p>3\u3001\u5f02\u5e38\u9519\u8bef\u4e0d\u540c<\/p>\n<p>\u5982\u679c\u6808\u5185\u5b58\u6216\u8005\u5806\u5185\u5b58\u4e0d\u8db3\u90fd\u4f1a\u629b\u51fa\u5f02\u5e38\u3002\u00a0\u00a0 \u6808\u7a7a\u95f4\u4e0d\u8db3&#xff1a;java.lang.StackOverFlowError\u3002 \u5806\u7a7a\u95f4\u00a0\u4e0d\u8db3&#xff1a;java.lang.OutOfMemoryError\u3002<\/p>\n<p>4\u3001\u7a7a\u95f4\u5927\u5c0f<\/p>\n<p>\u6808\u7684\u7a7a\u95f4\u5927\u5c0f\u8fdc\u8fdc\u5c0f\u4e8e\u5806\u7684\u3002<\/p>\n<\/p>\n<h4 id=\"6%E3%80%81%E4%BB%80%E4%B9%88%E6%98%AFJava%E8%99%9A%E6%8B%9F%E6%9C%BA%EF%BC%9F%E4%B8%BA%E4%BB%80%E4%B9%88Java%E8%A2%AB%E7%A7%B0%E4%BD%9C%E6%98%AF%E2%80%9C%E5%B9%B3%E5%8F%B0%E6%97%A0%E5%85%B3%E7%9A%84%E7%BC%96%E7%A8%8B%E8%AF%AD%E8%A8%80%E2%80%9D%20%EF%BC%9F\">6\u3001\u4ec0\u4e48\u662fJava\u865a\u62df\u673a&#xff1f;\u4e3a\u4ec0\u4e48Java\u88ab\u79f0\u4f5c\u662f\u201c\u5e73\u53f0\u65e0\u5173\u7684\u7f16\u7a0b\u8bed\u8a00\u201d\u00a0&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Java\u865a\u62df\u673a\u662f\u4e00\u4e2a\u53ef\u4ee5\u6267\u884cJava\u5b57\u8282\u7801\u7684\u865a\u62df\u673a\u8fdb\u7a0b\u3002Java\u6e90\u6587\u4ef6\u88ab\u7f16\u8bd1\u6210\u80fd\u88abJava\u865a\u62df\u673a\u6267\u884c\u7684\u5b57 \u8282\u7801\u6587\u4ef6\u00a0 \u00a0Java\u88ab\u8bbe\u8ba1\u6210\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u8fd0\u884c\u5728\u4efb\u610f\u7684\u5e73\u53f0&#xff0c;\u800c\u4e0d\u9700\u8981\u7a0b\u5e8f\u5458\u4e3a\u6bcf\u4e00\u4e2a\u5e73\u53f0\u5355\u72ec\u91cd\u5199\u6216\u8005\u662f\u91cd\u65b0\u7f16\u8bd1\u3002Java\u865a\u62df\u673a\u8ba9\u8fd9\u4e2a\u53d8\u4e3a\u53ef\u80fd&#xff0c;\u56e0\u4e3a\u5b83\u77e5\u9053\u5e95\u5c42\u786c\u4ef6\u5e73\u53f0\u7684\u6307\u4ee4\u957f\u5ea6\u548c\u5176\u4ed6\u7279\u6027\u3002<\/p>\n<p>\u00a0\u7bc7\u5e45\u9650\u5236\u4e0b\u9762\u5c31\u53ea\u80fd\u7ed9\u5927\u5bb6\u5c55\u793a\u5c0f\u518c\u90e8\u5206\u5185\u5bb9\u4e86\u3002\u6574\u7406\u4e86\u4e00\u4efd\u6838\u5fc3\u9762\u8bd5\u7b14\u8bb0\u5305\u62ec\u4e86&#xff1a;Java\u9762\u8bd5\u3001Spring\u3001JVM\u3001MyBatis\u3001Redis\u3001MySQL\u3001\u5e76\u53d1\u7f16\u7a0b\u3001\u5fae\u670d\u52a1\u3001Linux\u3001Springboot\u3001SpringCloud\u3001MQ\u3001Kafc<\/p>\n<p>\u9700\u8981\u5168\u5957\u9762\u8bd5\u7b14\u8bb0\u53ca\u7b54\u6848<span class=\"link-card-box\"><span class=\"link-title\">\u3010\u70b9\u51fb\u6b64\u5904\u5373\u53ef\/\u514d\u8d39\u83b7\u53d6\u3011<\/span><span class=\"link-link\"><img decoding=\"async\" class=\"link-link-icon\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260208064934-698831fe84504.png\" \/>https:\/\/docs.qq.com\/doc\/DQXdYWE9LZ2ZHZ1ho<\/span><\/span><\/p>\n<\/p>\n<h4 id=\"7%E3%80%81%E5%A6%82%E4%BD%95%E5%88%A4%E6%96%AD%E5%AF%B9%E8%B1%A1%E5%8F%AF%E4%BB%A5%E8%A2%AB%E5%9B%9E%E6%94%B6%EF%BC%9F\">7\u3001\u5982\u4f55\u5224\u65ad\u5bf9\u8c61\u53ef\u4ee5\u88ab\u56de\u6536&#xff1f;<\/h4>\n<p>\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u5b58\u6d3b\u4e00\u822c\u6709\u4e24\u79cd\u65b9\u5f0f&#xff1a;<\/p>\n<p>\u00a0\u00a0\u5f15\u7528\u8ba1\u6570&#xff1a;\u6bcf\u4e2a\u5bf9\u8c61\u6709\u4e00\u4e2a\u5f15\u7528\u8ba1\u6570\u5c5e\u6027&#xff0c;\u65b0\u589e\u4e00\u4e2a\u5f15\u7528\u65f6\u8ba1\u6570\u52a01&#xff0c;\u5f15\u7528\u91ca\u653e\u65f6\u8ba1\u6570\u51cf1&#xff0c;\u8ba1\u00a0\u6570\u4e3a0\u65f6\u53ef\u4ee5\u56de\u6536\u3002\u6b64\u65b9\u6cd5\u7b80\u5355&#xff0c;\u65e0\u6cd5\u89e3\u51b3\u5bf9\u8c61\u76f8\u4e92\u5faa\u73af\u5f15\u7528\u7684\u95ee\u9898\u3002<\/p>\n<p>\u00a0\u00a0\u53ef\u8fbe\u6027\u5206\u6790&#xff08;Reachability Analysis&#xff09;&#xff1a;\u4eceGC Roots\u5f00\u59cb\u5411\u4e0b\u641c\u7d22&#xff0c;\u641c\u7d22\u6240\u8d70\u8fc7\u7684\u8def\u5f84\u79f0\u4e3a\u5f15\u00a0\u7528\u94fe\u3002\u5f53\u4e00\u4e2a\u5bf9\u8c61\u5230GC Roots\u6ca1\u6709\u4efb\u4f55\u5f15\u7528\u94fe\u76f8\u8fde\u65f6&#xff0c;\u5219\u8bc1\u660e\u6b64\u5bf9\u8c61\u662f\u4e0d\u53ef\u7528\u7684&#xff0c;\u4e0d\u53ef\u8fbe\u5bf9\u00a0\u00a0 \u8c61\u3002<\/p>\n<\/p>\n<h4 id=\"8%E3%80%81%E8%AF%B4%E4%B8%80%E4%B8%8B%20JVM%20%E6%9C%89%E5%93%AA%E4%BA%9B%E5%9E%83%E5%9C%BE%E5%9B%9E%E6%94%B6%E5%99%A8%EF%BC%9F\">8\u3001\u8bf4\u4e00\u4e0b\u00a0JVM\u00a0\u6709\u54ea\u4e9b\u5783\u573e\u56de\u6536\u5668&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5982\u679c\u8bf4\u5783\u573e\u6536\u96c6\u7b97\u6cd5\u662f\u5185\u5b58\u56de\u6536\u7684\u65b9\u6cd5\u8bba&#xff0c;\u90a3\u4e48\u5783\u573e\u6536\u96c6\u5668\u5c31\u662f\u5185\u5b58\u56de\u6536\u7684\u5177\u4f53\u5b9e\u73b0\u3002\u4e0b\u56fe\u5c55\u793a\u4e86\u00a07\u79cd\u4f5c\u7528\u4e8e\u4e0d\u540c\u5206\u4ee3\u7684\u6536\u96c6\u5668&#xff0c;\u5176\u4e2d\u7528\u4e8e\u56de\u6536\u65b0\u751f\u4ee3\u7684\u6536\u96c6\u5668\u5305\u62ecSerial\u3001\u00a0PraNew\u3001\u00a0Parallel\u3001Scavenge&#xff0c;\u56de\u6536\u8001\u5e74\u4ee3\u7684\u6536\u96c6\u5668\u5305\u62ecSerial Old\u3001\u00a0Parallel Old\u3001CMS&#xff0c;\u8fd8\u6709\u7528\u4e8e\u56de\u6536\u6574\u4e2aJava\u5806\u7684\u00a0G1\u6536\u96c6\u5668\u3002\u4e0d\u540c\u6536\u96c6\u5668\u4e4b\u95f4\u7684\u8fde\u7ebf\u8868\u793a\u5b83\u4eec\u53ef\u4ee5\u642d\u914d\u4f7f\u7528\u3002<\/p>\n<p>JVM \u4e2d\u6709\u4ee5\u4e0b\u51e0\u79cd\u5e38\u89c1\u7684\u5783\u573e\u56de\u6536\u5668&#xff1a;<\/p>\n<p>Serial \u6536\u96c6\u5668 \u00a0 \u00a0&#8211; \u5b83\u662f\u4e00\u4e2a\u5355\u7ebf\u7a0b\u7684\u6536\u96c6\u5668&#xff0c;\u53ea\u4f7f\u7528\u4e00\u4e2a\u7ebf\u7a0b\u53bb\u6267\u884c\u5783\u573e\u56de\u6536\u4efb\u52a1\u3002\u5728\u5783\u573e\u56de\u6536\u671f\u95f4&#xff0c;\u6240\u6709\u7528\u6237\u7ebf\u7a0b\u90fd\u4f1a\u88ab\u6682\u505c&#xff08;Stop &#8211; The &#8211; World&#xff0c;STW&#xff09;\u3002\u4f8b\u5982&#xff0c;\u5728\u65b0\u751f\u4ee3\u56de\u6536\u8fc7\u7a0b\u4e2d&#xff0c;\u5b83\u4f1a\u9010\u4e2a\u68c0\u67e5\u65b0\u751f\u4ee3\u4e2d\u7684\u5bf9\u8c61&#xff0c;\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u8fd8\u5b58\u6d3b\u3002\u5982\u679c\u5bf9\u8c61\u4e0d\u518d\u88ab\u4efb\u4f55\u5f15\u7528\u94fe\u6240\u8fde\u63a5&#xff0c;\u5c31\u5c06\u5176\u6807\u8bb0\u4e3a\u53ef\u56de\u6536\u5bf9\u8c61&#xff0c;\u7136\u540e\u8fdb\u884c\u56de\u6536\u3002 \u00a0 \u00a0&#8211; \u4e3b\u8981\u91c7\u7528\u6807\u8bb0 &#8211; \u590d\u5236\u7b97\u6cd5\u3002\u65b0\u751f\u4ee3\u88ab\u5212\u5206\u4e3a Eden \u533a\u548c\u4e24\u4e2a Survivor \u533a&#xff08;From \u548c To&#xff09;\u3002\u5728\u5783\u573e\u56de\u6536\u65f6&#xff0c;\u5c06 Eden \u533a\u548c From Survivor \u533a\u4e2d\u5b58\u6d3b\u7684\u5bf9\u8c61\u590d\u5236\u5230 To Survivor \u533a&#xff0c;\u7136\u540e\u6e05\u7406 Eden \u533a\u548c From Survivor \u533a\u3002\u4e4b\u540e\u4ea4\u6362 From \u548c To Survivor \u533a\u7684\u89d2\u8272\u3002 \u00a0<\/p>\n<p>ParNew \u6536\u96c6\u5668 \u00a0 \u00a0&#8211; \u5b83\u662f Serial \u6536\u96c6\u5668\u7684\u591a\u7ebf\u7a0b\u7248\u672c\u3002\u5728\u65b0\u751f\u4ee3\u56de\u6536\u65f6&#xff0c;\u53ef\u4ee5\u542f\u52a8\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8fdb\u884c\u5783\u573e\u56de\u6536\u3002\u5b83\u4e5f\u662f\u57fa\u4e8e\u6807\u8bb0 &#8211; \u590d\u5236\u7b97\u6cd5\u3002\u4e0e Serial \u6536\u96c6\u5668\u7c7b\u4f3c&#xff0c;\u5b83\u4f1a\u5148\u6807\u8bb0\u65b0\u751f\u4ee3\u4e2d\u7684\u5b58\u6d3b\u5bf9\u8c61&#xff0c;\u7136\u540e\u5c06\u5b58\u6d3b\u5bf9\u8c61\u590d\u5236\u5230 Survivor \u533a\u3002\u4e0d\u8fc7&#xff0c;\u7531\u4e8e\u591a\u7ebf\u7a0b\u7684\u7279\u6027&#xff0c;\u5728\u590d\u5236\u5bf9\u8c61\u7684\u8fc7\u7a0b\u4e2d&#xff0c;\u591a\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u5e76\u884c\u5730\u4ece Eden \u533a\u548c From Survivor \u533a\u590d\u5236\u5bf9\u8c61\u5230 To Survivor \u533a&#xff0c;\u4ece\u800c\u63d0\u9ad8\u56de\u6536\u6548\u7387\u3002 \u00a0<\/p>\n<p>Parallel Scavenge \u6536\u96c6\u5668 \u00a0 \u00a0&#8211; \u548c ParNew \u6536\u96c6\u5668\u4e00\u6837&#xff0c;\u5b83\u4e5f\u662f\u591a\u7ebf\u7a0b\u7684\u65b0\u751f\u4ee3\u6536\u96c6\u5668\u3002\u4e0d\u8fc7&#xff0c;\u5b83\u7684\u76ee\u6807\u662f\u8fbe\u5230\u4e00\u4e2a\u53ef\u63a7\u5236\u7684\u541e\u5410\u91cf\u3002\u5b83\u91c7\u7528\u6807\u8bb0 &#8211; \u590d\u5236\u7b97\u6cd5\u3002\u5728\u5783\u573e\u56de\u6536\u8fc7\u7a0b\u4e2d&#xff0c;\u5b83\u4f1a\u6839\u636e\u7cfb\u7edf\u7684\u914d\u7f6e&#xff08;\u5982 -XX:GCTimeRatio \u53c2\u6570\u8bbe\u7f6e\u5783\u573e\u56de\u6536\u65f6\u95f4\u5360\u603b\u8fd0\u884c\u65f6\u95f4\u7684\u6bd4\u4f8b&#xff09;\u6765\u8c03\u6574\u65b0\u751f\u4ee3\u7684\u5927\u5c0f\u548c\u5783\u573e\u56de\u6536\u7684\u9891\u7387\u3002\u4f8b\u5982&#xff0c;\u5982\u679c\u8bbe\u7f6e -XX:GCTimeRatio&#061;9&#xff0c;\u610f\u5473\u7740\u5783\u573e\u56de\u6536\u65f6\u95f4\u5360\u603b\u8fd0\u884c\u65f6\u95f4\u7684 1\/10&#xff0c;\u5b83\u4f1a\u901a\u8fc7\u8c03\u6574\u65b0\u751f\u4ee3\u7684\u5927\u5c0f\u6765\u5c3d\u91cf\u6ee1\u8db3\u8fd9\u4e2a\u6bd4\u4f8b\u8981\u6c42\u3002 \u00a0<\/p>\n<p>Serial Old \u6536\u96c6\u5668 1. **\u5de5\u4f5c\u539f\u7406** \u00a0 \u00a0&#8211; \u5b83\u662f Serial \u6536\u96c6\u5668\u7684\u8001\u5e74\u4ee3\u7248\u672c\u3002\u5b83\u662f\u5355\u7ebf\u7a0b\u7684&#xff0c;\u91c7\u7528\u6807\u8bb0 &#8211; \u6574\u7406\u7b97\u6cd5\u3002\u5728\u5783\u573e\u56de\u6536\u65f6&#xff0c;\u5148\u6807\u8bb0\u8001\u5e74\u4ee3\u4e2d\u7684\u5b58\u6d3b\u5bf9\u8c61&#xff0c;\u7136\u540e\u5c06\u5b58\u6d3b\u5bf9\u8c61\u5411\u5185\u5b58\u7684\u4e00\u7aef\u8fdb\u884c\u6574\u7406&#xff0c;\u6e05\u7406\u6389\u4e2d\u95f4\u7684\u7a7a\u767d\u533a\u57df\u3002\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u907f\u514d\u5185\u5b58\u788e\u7247\u5316\u7684\u95ee\u9898&#xff0c;\u56e0\u4e3a\u8001\u5e74\u4ee3\u7684\u5bf9\u8c61\u76f8\u5bf9\u6bd4\u8f83\u7a33\u5b9a&#xff0c;\u4e0d\u4f1a\u9891\u7e41\u5730\u521b\u5efa\u548c\u9500\u6bc1\u3002 2. **\u9002\u7528\u573a\u666f** \u00a0 \u00a0&#8211; \u901a\u5e38\u548c Serial \u6536\u96c6\u5668\u6216\u8005 ParNew \u6536\u96c6\u5668\u914d\u5408\u4f7f\u7528\u3002\u5f53\u65b0\u751f\u4ee3\u7684\u5bf9\u8c61\u664b\u5347\u5230\u8001\u5e74\u4ee3\u540e&#xff0c;\u53ef\u4ee5\u4f7f\u7528 Serial Old \u6536\u96c6\u5668\u6765\u56de\u6536\u8001\u5e74\u4ee3\u3002\u5b83\u9002\u7528\u4e8e\u5bf9\u8001\u5e74\u4ee3\u5783\u573e\u56de\u6536\u8981\u6c42\u4e0d\u9ad8\u7684\u573a\u666f&#xff0c;\u6bd4\u5982\u4e00\u4e9b\u5c0f\u578b\u5e94\u7528\u6216\u8005\u5355\u6838\u5904\u7406\u5668\u7684\u7cfb\u7edf&#xff0c;\u56e0\u4e3a\u5355\u7ebf\u7a0b\u7684\u7279\u6027&#xff0c;\u5b83\u7684\u8d44\u6e90\u6d88\u8017\u76f8\u5bf9\u8f83\u5c0f\u3002<\/p>\n<p>Parallel Old \u6536\u96c6\u5668 \u00a0 \u00a0&#8211; \u5b83\u662f Parallel Scavenge \u6536\u96c6\u5668\u7684\u8001\u5e74\u4ee3\u7248\u672c&#xff0c;\u91c7\u7528\u591a\u7ebf\u7a0b\u7684\u6807\u8bb0 &#8211; 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id=\"10.%E5%AF%B9%E8%B1%A1%E7%9A%84%E5%88%9B%E5%BB%BA%E8%BF%87%E7%A8%8B\">10\u3001\u5bf9\u8c61\u7684\u521b\u5efa\u8fc7\u7a0b<\/h4>\n<p>&#xff08;1&#xff09;\u68c0\u67e5\u7c7b\u662f\u5426\u5df2\u88ab\u52a0\u8f7d&#xff0c;\u6ca1\u6709\u52a0\u8f7d\u5c31\u5148\u52a0\u8f7d\u7c7b<\/p>\n<p>&#xff08;2&#xff09;\u4e3a\u5bf9\u8c61\u5728\u5806\u4e2d\u5206\u914d\u5185\u5b58&#xff0c;\u4f7f\u7528CAS\u65b9\u5f0f\u5206\u914d&#xff0c;\u9632\u6b62\u5728\u4e3aA\u5206\u914d\u5185\u5b58\u65f6&#xff0c;\u6267\u884c\u5f53\u524d\u5730\u5740\u7684\u6307\u9488\u8fd8\u6ca1\u6709\u6765\u5f97\u53ca\u4fee\u6539&#xff0c;\u5bf9\u8c61B\u5c31\u62ff\u6765\u5206\u914d\u5185\u5b58\u3002<\/p>\n<p>&#xff08;3&#xff09;\u521d\u59cb\u5316&#xff0c;\u5c06\u5bf9\u8c61\u4e2d\u7684\u5c5e\u6027\u90fd\u5206\u914d0\u503c\u6216null<\/p>\n<p>&#xff08;4&#xff09;\u8bbe\u7f6e\u5bf9\u8c61\u5934<\/p>\n<p>&#xff08;5&#xff09;\u4e3a\u5c5e\u6027\u8d4b\u503c\u548c\u6267\u884c\u6784\u9020\u65b9\u6cd5<\/p>\n<\/p>\n<h4 id=\"13.GC%E7%9A%84%E5%9B%9E%E6%94%B6%E6%9C%BA%E5%88%B6%E5%92%8C%E5%8E%9F%E7%90%86\">11\u3001\u8bf4\u8bf4\u4ec0\u4e48\u662f\u5783\u573e\u56de\u6536GC&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0GC \u662f Garbage Collection \u7684\u7f29\u5199&#xff0c;\u5373\u5783\u573e\u56de\u6536\u3002\u5b83\u662f Java \u865a\u62df\u673a&#xff08;JVM&#xff09;\u81ea\u52a8\u7ba1\u7406\u5185\u5b58\u7684\u4e00\u79cd\u673a\u5236\u3002\u5728 Java \u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d&#xff0c;\u4f1a\u4e0d\u65ad\u521b\u5efa\u5bf9\u8c61&#xff0c;\u5f53\u8fd9\u4e9b\u5bf9\u8c61\u4e0d\u518d\u88ab\u4f7f\u7528\u65f6&#xff0c;\u5982\u679c\u4e0d\u8fdb\u884c\u56de\u6536&#xff0c;\u5c31\u4f1a\u5360\u7528\u5185\u5b58\u7a7a\u95f4&#xff0c;\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u7b49\u95ee\u9898\u3002GC 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id=\"12.GC%E5%A6%82%E4%BD%95%E5%88%A4%E6%96%AD%E5%AF%B9%E8%B1%A1%E5%8F%AF%E4%BB%A5%E8%A2%AB%E5%9B%9E%E6%94%B6%EF%BC%9F\">12\u3001GC\u5982\u4f55\u5224\u65ad\u5bf9\u8c61\u53ef\u4ee5\u88ab\u56de\u6536&#xff1f;<\/h4>\n<p>&#xff08;1&#xff09;\u5f15\u7528\u8ba1\u6570\u6cd5&#xff1a;\u5df2\u6dd8\u6c70&#xff0c;\u4e3a\u6bcf\u4e2a\u5bf9\u8c61\u6dfb\u52a0\u5f15\u7528\u8ba1\u6570\u5668&#xff0c;\u5f15\u7528\u4e3a0\u65f6\u5224\u5b9a\u53ef\u4ee5\u56de\u6536&#xff0c;\u4f1a\u6709\u4e24\u4e2a\u5bf9\u8c61\u76f8\u4e92\u5f15\u7528\u65e0\u6cd5\u56de\u6536\u7684\u95ee\u9898<\/p>\n<p>&#xff08;2&#xff09;\u53ef\u8fbe\u6027\u5206\u6790\u6cd5&#xff1a;\u4eceGCRoot\u5f00\u59cb\u5f80\u4e0b\u641c\u7d22&#xff0c;\u641c\u7d22\u8fc7\u7684\u8def\u5f84\u79f0\u4e3a\u5f15\u7528\u94fe&#xff0c;\u82e5\u4e00\u4e2a\u5bf9\u8c61GCRoot\u6ca1\u6709\u4efb\u4f55\u7684\u5f15\u7528\u94fe&#xff0c;\u5219\u5224\u5b9a\u53ef\u4ee5\u56de\u6536<\/p>\n<p>\u00a0 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id=\"2%E3%80%81%E8%AF%B4%E8%AF%B4%E7%BA%BF%E7%A8%8B%E4%B8%8E%E8%BF%9B%E7%A8%8B%E7%9A%84%E5%8C%BA%E5%88%AB\">2\u3001\u8bf4\u8bf4\u7ebf\u7a0b\u4e0e\u8fdb\u7a0b\u7684\u533a\u522b<\/h4>\n<p>\u8fdb\u7a0b&#xff1a;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u8fdb\u7a0b\u662f\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u884c\u8d44\u6e90\u5206\u914d\u548c\u8c03\u5ea6\u7684\u4e00\u4e2a\u72ec\u7acb\u5355\u4f4d\u3002\u5b83\u5305\u542b\u4e86\u7a0b\u5e8f\u8fd0\u884c\u6240\u9700\u7684\u6240\u6709\u8d44\u6e90&#xff0c;\u5982\u5185\u5b58\u7a7a\u95f4\u3001\u6587\u4ef6\u63cf\u8ff0\u7b26\u7b49\u3002\u4e00\u4e2a Java \u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u65f6\u5c31\u662f\u4e00\u4e2a\u8fdb\u7a0b&#xff0c;\u6bd4\u5982\u542f\u52a8\u4e00\u4e2a Java Web \u670d\u52a1&#xff0c;\u5b83\u5c31\u662f\u4e00\u4e2a\u72ec\u7acb\u7684\u8fdb\u7a0b\u3002<\/p>\n<p>\u7ebf\u7a0b&#xff1a;<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7ebf\u7a0b\u662f\u8fdb\u7a0b\u4e2d\u7684\u4e00\u4e2a\u6267\u884c\u5355\u5143&#xff0c;\u4e00\u4e2a\u8fdb\u7a0b\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u7ebf\u7a0b\u3002\u7ebf\u7a0b\u5171\u4eab\u6240\u5c5e\u8fdb\u7a0b\u7684\u8d44\u6e90&#xff0c;\u5982\u5185\u5b58\u7a7a\u95f4\u3002\u5728 Java \u4e2d&#xff0c;\u7ebf\u7a0b\u7684\u521b\u5efa\u548c\u7ba1\u7406\u662f\u7531 Java \u865a\u62df\u673a&#xff08;JVM&#xff09;\u548c\u64cd\u4f5c\u7cfb\u7edf\u5171\u540c\u5b8c\u6210\u7684\u3002\u4f8b\u5982&#xff0c;\u5728\u4e00\u4e2a Java Web \u670d\u52a1\u8fdb\u7a0b\u4e2d&#xff0c;\u53ef\u4ee5\u6709\u591a\u4e2a\u7ebf\u7a0b\u5904\u7406\u4e0d\u540c\u7684 HTTP \u8bf7\u6c42&#xff0c;\u8fd9\u4e9b\u7ebf\u7a0b\u5171\u4eab\u8fdb\u7a0b\u7684\u5185\u5b58\u7a7a\u95f4&#xff0c;\u5305\u62ec\u7c7b\u52a0\u8f7d\u5668\u52a0\u8f7d\u7684\u7c7b\u4fe1\u606f\u3001\u9759\u6001\u53d8\u91cf\u7b49\u3002<\/p>\n<\/p>\n<h4 id=\"3%E3%80%81Java%20%E4%B8%AD%E5%88%9B%E5%BB%BA%E7%BA%BF%E7%A8%8B%E7%9A%84%E6%96%B9%E5%BC%8F\">3\u3001Java \u4e2d\u521b\u5efa\u7ebf\u7a0b\u7684\u65b9\u5f0f<\/h4>\n<p>&#xff08;\u4e00&#xff09;\u7ee7\u627f Thread \u7c7b<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u521b\u5efa\u4e00\u4e2a\u7ee7\u627f\u81ea Thread \u7c7b\u7684\u5b50\u7c7b\u3002\u91cd\u5199 run() \u65b9\u6cd5&#xff0c;\u5728 run() \u65b9\u6cd5\u4e2d\u7f16\u5199\u7ebf\u7a0b\u8981\u6267\u884c\u7684\u4efb\u52a1\u4ee3\u7801\u3002\u521b\u5efa Thread \u5b50\u7c7b\u7684\u5b9e\u4f8b\u5bf9\u8c61\u3002\u8c03\u7528 start() \u65b9\u6cd5\u542f\u52a8\u7ebf\u7a0b\u3002<\/p>\n<p>&#xff08;\u4e8c&#xff09;\u5b9e\u73b0 Runnable \u63a5\u53e3<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u521b\u5efa\u4e00\u4e2a\u5b9e\u73b0\u4e86 Runnable \u63a5\u53e3\u7684\u7c7b\u3002\u5b9e\u73b0 run() \u65b9\u6cd5&#xff0c;\u5728 run() \u65b9\u6cd5\u4e2d\u7f16\u5199\u7ebf\u7a0b\u8981\u6267\u884c\u7684\u4efb\u52a1\u4ee3\u7801\u3002\u521b\u5efa Runnable \u5b9e\u73b0\u7c7b\u7684\u5b9e\u4f8b\u5bf9\u8c61\u3002\u521b\u5efa Thread \u7c7b\u7684\u5b9e\u4f8b\u5bf9\u8c61&#xff0c;\u5e76\u5c06 Runnable \u5b9e\u73b0\u7c7b\u7684\u5b9e\u4f8b\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9 Thread \u7c7b\u7684\u6784\u9020\u65b9\u6cd5\u3002\u8c03\u7528 Thread \u7c7b\u5b9e\u4f8b\u5bf9\u8c61\u7684 start() \u65b9\u6cd5\u542f\u52a8\u7ebf\u7a0b\u3002<\/p>\n<p>&#xff08;\u4e09&#xff09;\u4f7f\u7528 Callable \u548c Future<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u521b\u5efa\u4e00\u4e2a\u5b9e\u73b0\u4e86 Callable \u63a5\u53e3\u7684\u7c7b\u3002\u5b9e\u73b0 call() \u65b9\u6cd5&#xff0c;\u5728 call() \u65b9\u6cd5\u4e2d\u7f16\u5199\u7ebf\u7a0b\u8981\u6267\u884c\u7684\u4efb\u52a1\u4ee3\u7801&#xff0c;\u5e76\u4e14\u53ef\u4ee5\u8fd4\u56de\u4e00\u4e2a\u7ed3\u679c\u3002\u521b\u5efa Callable \u5b9e\u73b0\u7c7b\u7684\u5b9e\u4f8b\u5bf9\u8c61\u3002\u4f7f\u7528 Executors \u5de5\u5177\u7c7b\u521b\u5efa\u4e00\u4e2a ExecutorService \u7ebf\u7a0b\u6c60\u3002\u8c03\u7528 ExecutorService \u7684 submit() \u65b9\u6cd5\u63d0\u4ea4 Callable \u4efb\u52a1&#xff0c;\u8be5\u65b9\u6cd5\u4f1a\u8fd4\u56de\u4e00\u4e2a Future \u5bf9\u8c61\u3002\u901a\u8fc7 Future \u5bf9\u8c61\u7684 get() \u65b9\u6cd5\u83b7\u53d6\u7ebf\u7a0b\u6267\u884c\u7684\u7ed3\u679c\u3002<\/p>\n<\/p>\n<h4 id=\"2.%20%E4%BB%80%E4%B9%88%E6%98%AF%E7%BA%BF%E7%A8%8B%E4%B8%8A%E4%B8%8B%E6%96%87%E5%88%87%E6%8D%A2\">4\u3001\u4ec0\u4e48\u662f\u7ebf\u7a0b\u4e0a\u4e0b\u6587\u5207\u6362<\/h4>\n<p>\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u88ab\u5265\u593acpu\u4f7f\u7528\u6743\u65f6&#xff0c;\u5207\u6362\u5230\u53e6\u5916\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c<\/p>\n<\/p>\n<h4 id=\"%C2%A03.%E4%BB%80%E4%B9%88%E6%98%AF%E6%AD%BB%E9%94%81\">5\u3001\u4ec0\u4e48\u662f\u6b7b\u9501<\/h4>\n<p>\u6b7b\u9501\u6307\u591a\u4e2a\u7ebf\u7a0b\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d&#xff0c;\u56e0\u4e89\u593a\u8d44\u6e90\u9020\u6210\u7684\u4e00\u79cd\u76f8\u4e92\u7b49\u5f85\u7684\u50f5\u5c40<\/p>\n<\/p>\n<h4 id=\"6%E3%80%81%E4%BB%80%E4%B9%88%E6%98%AFAQS%E9%94%81%3F\">6\u3001\u4ec0\u4e48\u662fAQS\u9501?<\/h4>\n<p> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0AQS\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b&#xff0c;\u53ef\u4ee5\u7528\u6765\u6784\u9020\u9501\u548c\u540c\u6b65\u7c7b&#xff0c;\u5982ReentrantLock&#xff0c;Semaphore&#xff0c;CountDownLatch&#xff0c;CyclicBarrier\u3002<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0AQS\u7684\u539f\u7406\u662f&#xff0c;AQS\u5185\u90e8\u6709\u4e09\u4e2a\u6838\u5fc3\u7ec4\u4ef6&#xff0c;\u4e00\u4e2a\u662fstate\u4ee3\u8868\u52a0\u9501\u72b6\u6001\u521d\u59cb\u503c\u4e3a0&#xff0c;\u4e00\u4e2a\u662f\u83b7\u53d6\u5230\u9501\u7684\u7ebf\u7a0b&#xff0c;\u8fd8\u6709\u4e00\u4e2a\u963b\u585e\u961f\u5217\u3002\u5f53\u6709\u7ebf\u7a0b\u60f3\u83b7\u53d6\u9501\u65f6&#xff0c;\u4f1a\u4ee5CAS\u7684\u5f62\u5f0f\u5c06state\u53d8\u4e3a1&#xff0c;CAS\u6210\u529f\u540e\u4fbf\u5c06\u52a0\u9501\u7ebf\u7a0b\u8bbe\u4e3a\u81ea\u5df1\u3002\u5f53\u5176\u4ed6\u7ebf\u7a0b\u6765\u7ade\u4e89\u9501\u65f6\u4f1a\u5224\u65adstate\u662f\u4e0d\u662f0&#xff0c;\u4e0d\u662f0\u518d\u5224\u65ad\u52a0\u9501\u7ebf\u7a0b\u662f\u4e0d\u662f\u81ea\u5df1&#xff0c;\u4e0d\u662f\u7684\u8bdd\u5c31\u628a\u81ea\u5df1\u653e\u5165\u963b\u585e\u961f\u5217\u3002\u8fd9\u4e2a\u963b\u585e\u961f\u5217\u662f\u7528\u53cc\u5411\u94fe\u8868\u5b9e\u73b0\u7684<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53ef\u91cd\u5165\u9501\u7684\u539f\u7406\u5c31\u662f\u6bcf\u6b21\u52a0\u9501\u65f6\u5224\u65ad\u4e00\u4e0b\u52a0\u9501\u7ebf\u7a0b\u662f\u4e0d\u662f\u81ea\u5df1&#xff0c;\u662f\u7684\u8bddstate&#043;1&#xff0c;\u91ca\u653e\u9501\u7684\u65f6\u5019\u5c31\u5c06state-1\u3002\u5f53state\u51cf\u52300\u7684\u65f6\u5019\u5c31\u53bb\u5524\u9192\u963b\u585e\u961f\u5217\u7684\u7b2c\u4e00\u4e2a\u7ebf\u7a0b\u3002<\/p>\n<\/p>\n<h4 id=\"7%E3%80%81%E6%9C%89%E5%93%AA%E4%BA%9B%E5%B8%B8%E8%A7%81%E7%9A%84AQS%E9%94%81\">7\u3001\u6709\u54ea\u4e9b\u5e38\u89c1\u7684AQS\u9501<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0AQS&#xff08;AbstractQueuedSynchronizer&#xff09;\u662f Java \u5e76\u53d1\u5305 &#096;java.util.concurrent.locks&#096; \u4e2d\u7684\u4e00\u4e2a\u6838\u5fc3\u7c7b&#xff0c;\u7528\u4e8e\u6784\u5efa\u9501\u548c\u5176\u4ed6\u540c\u6b65\u7ec4\u4ef6\u3002AQS \u63d0\u4f9b\u4e86\u4e00\u79cd\u57fa\u4e8e FIFO \u7b49\u5f85\u961f\u5217\u7684\u673a\u5236&#xff0c;\u7528\u4e8e\u7ba1\u7406\u7ebf\u7a0b\u7684\u83b7\u53d6\u548c\u91ca\u653e\u8d44\u6e90\u7684\u987a\u5e8f&#xff0c;\u5e76\u63d0\u4f9b\u4e86\u4e00\u4e9b\u6a21\u677f\u65b9\u6cd5\u4f9b\u5b50\u7c7b\u5b9e\u73b0\u5177\u4f53\u7684\u540c\u6b65\u7b56\u7565\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u57fa\u4e8e AQS \u5b9e\u73b0\u7684\u9501&#xff1a;<\/p>\n<p>ReentrantLock&#xff08;\u53ef\u91cd\u5165\u9501&#xff09; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5141\u8bb8\u540c\u4e00\u4e2a\u7ebf\u7a0b\u591a\u6b21\u83b7\u53d6\u9501&#xff0c;\u6bcf\u6b21\u83b7\u53d6\u9501\u65f6\u8ba1\u6570\u5668\u52a0\u4e00&#xff0c;\u6bcf\u6b21\u91ca\u653e\u9501\u65f6\u8ba1\u6570\u5668\u51cf\u4e00&#xff0c;\u76f4\u5230\u8ba1\u6570\u5668\u4e3a 0 \u65f6\u624d\u5b8c\u5168\u91ca\u653e\u9501\u3002\u652f\u6301\u516c\u5e73\u9501&#xff08;\u6309\u7167\u8bf7\u6c42\u987a\u5e8f\u5206\u914d\u9501&#xff09;\u548c\u975e\u516c\u5e73\u9501&#xff08;\u5141\u8bb8\u63d2\u961f&#xff09;\u3002 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f7f\u7528\u573a\u666f&#xff1a;\u66ff\u4ee3 &#096;synchronized&#096; \u5173\u952e\u5b57&#xff0c;\u63d0\u4f9b\u66f4\u7075\u6d3b\u7684\u9501\u5b9a\u673a\u5236\u3002\u00a0<\/p>\n<p>ReentrantReadWriteLock&#xff08;\u53ef\u91cd\u5165\u8bfb\u5199\u9501&#xff09; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5c06\u8bfb\u64cd\u4f5c\u4e0e\u5199\u64cd\u4f5c\u5206\u79bb&#xff0c;\u5141\u8bb8\u591a\u4e2a\u8bfb\u64cd\u4f5c\u5e76\u53d1\u6267\u884c&#xff0c;\u4f46\u5199\u64cd\u4f5c\u662f\u6392\u4ed6\u7684&#xff0c;\u5373\u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u8fdb\u884c\u5199\u64cd\u4f5c&#xff0c;\u5e76\u4e14\u5199\u64cd\u4f5c\u4f1a\u963b\u585e\u6240\u6709\u5176\u4ed6\u8bfb\u5199\u64cd\u4f5c\u3002 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f7f\u7528\u573a\u666f&#xff1a;\u9002\u7528\u4e8e\u8bfb\u591a\u5199\u5c11\u7684\u60c5\u51b5&#xff0c;\u63d0\u9ad8\u5e76\u53d1\u6027\u80fd\u3002\u00a0<\/p>\n<p>Semaphore&#xff08;\u4fe1\u53f7\u91cf&#xff09; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7528\u4e8e\u63a7\u5236\u540c\u65f6\u8bbf\u95ee\u67d0\u4e2a\u8d44\u6e90\u7684\u7ebf\u7a0b\u6570\u91cf\u3002\u5b83\u53ef\u4ee5\u7528\u6765\u9650\u5236\u540c\u65f6\u6267\u884c\u7684\u7ebf\u7a0b\u6570&#xff0c;\u6216\u8005\u5b9e\u73b0\u8d44\u6e90\u6c60\u7684\u7ba1\u7406\u3002 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f7f\u7528\u573a\u666f&#xff1a;\u9650\u5236\u8d44\u6e90\u7684\u5e76\u53d1\u8bbf\u95ee&#xff0c;\u4f8b\u5982\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u3001\u7ebf\u7a0b\u6c60\u7b49\u3002\u00a0<\/p>\n<p>CountDownLatch \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5141\u8bb8\u4e00\u4e2a\u6216\u591a\u4e2a\u7ebf\u7a0b\u7b49\u5f85\u5176\u4ed6\u7ebf\u7a0b\u5b8c\u6210\u4e00\u7ec4\u64cd\u4f5c\u540e\u518d\u7ee7\u7eed\u6267\u884c\u3002\u521d\u59cb\u5316\u65f6\u8bbe\u5b9a\u4e00\u4e2a\u8ba1\u6570\u503c&#xff0c;\u6bcf\u4e2a\u4e8b\u4ef6\u5b8c\u6210\u540e\u8c03\u7528 &#096;countDown()&#096; \u65b9\u6cd5\u4f7f\u8ba1\u6570\u9012\u51cf&#xff0c;\u5f53\u8ba1\u6570\u8fbe\u5230\u96f6\u65f6&#xff0c;\u6240\u6709\u56e0\u8c03\u7528 &#096;await()&#096; \u65b9\u6cd5\u800c\u7b49\u5f85\u7684\u7ebf\u7a0b\u88ab\u91ca\u653e\u3002 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f7f\u7528\u573a\u666f&#xff1a;\u786e\u4fdd\u67d0\u4e9b\u64cd\u4f5c\u5728\u7ee7\u7eed\u4e4b\u524d\u5b8c\u6210&#xff0c;\u6bd4\u5982\u7b49\u5f85\u6240\u6709\u5b50\u7ebf\u7a0b\u5b8c\u6210\u4efb\u52a1\u540e\u4e3b\u7ebf\u7a0b\u518d\u7ee7\u7eed\u3002\u00a0<\/p>\n<p>CyclicBarrier&#xff08;\u5faa\u73af\u5c4f\u969c&#xff09; \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5141\u8bb8\u4e00\u7ec4\u7ebf\u7a0b\u76f8\u4e92\u7b49\u5f85&#xff0c;\u76f4\u5230\u6240\u6709\u7ebf\u7a0b\u90fd\u8fbe\u5230\u67d0\u4e2a\u516c\u5171\u5c4f\u969c\u70b9\u540e\u518d\u7ee7\u7eed\u6267\u884c\u3002\u5b83\u5e38\u7528\u4e8e\u5206\u9636\u6bb5\u7684\u4efb\u52a1\u5e76\u884c\u6267\u884c\u3002 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4f7f\u7528\u573a\u666f&#xff1a;\u5206\u9636\u6bb5\u7684\u4efb\u52a1\u5e76\u884c\u6267\u884c&#xff0c;\u4f8b\u5982\u591a\u7ebf\u7a0b\u8ba1\u7b97\u4efb\u52a1\u7684\u6bcf\u4e2a\u9636\u6bb5\u90fd\u9700\u8981\u6240\u6709\u7ebf\u7a0b\u5b8c\u6210\u540e\u518d\u8fdb\u5165\u4e0b\u4e00\u4e2a\u9636\u6bb5\u3002\u00a0<\/p>\n<\/p>\n<h4 id=\"8%E3%80%81Thread%E7%B1%BB%E4%B8%AD%E7%9A%84yield%E6%96%B9%E6%B3%95%E6%9C%89%E4%BB%80%E4%B9%88%E4%BD%9C%E7%94%A8%EF%BC%9F\">8\u3001Thread\u7c7b\u4e2d\u7684yield\u65b9\u6cd5\u6709\u4ec0\u4e48\u4f5c\u7528&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Yield\u65b9\u6cd5\u53ef\u4ee5\u6682\u505c\u5f53\u524d\u6b63\u5728\u6267\u884c\u7684\u7ebf\u7a0b\u5bf9\u8c61&#xff0c;\u8ba9\u5176\u5b83\u6709\u76f8\u540c\u4f18\u5148\u7ea7\u7684\u7ebf\u7a0b\u6267\u884c\u3002\u5b83\u662f\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\u00a0\u800c\u4e14\u53ea\u4fdd\u8bc1\u5f53\u524d\u7ebf\u7a0b\u653e\u5f03CPU\u5360\u7528\u800c\u4e0d\u80fd\u4fdd\u8bc1\u4f7f\u5176\u5b83\u7ebf\u7a0b\u4e00\u5b9a\u80fd\u5360\u7528CPU&#xff0c;\u6267\u884cyield()\u7684\u7ebf\u7a0b\u6709\u53ef\u00a0\u00a0\u00a0\u80fd\u5728\u8fdb\u5165\u5230\u6682\u505c\u72b6\u6001\u540e\u9a6c\u4e0a\u53c8\u88ab\u6267\u884c\u3002<\/p>\n<\/p>\n<h4 id=\"9%E3%80%81Java%E7%BA%BF%E7%A8%8B%E6%B1%A0%E4%B8%ADsubmit()%20%E5%92%8C%20execute()%E6%96%B9%E6%B3%95%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%EF%BC%9F\">9\u3001Java\u7ebf\u7a0b\u6c60\u4e2dsubmit()\u00a0\u548c\u00a0execute()\u65b9\u6cd5\u6709\u4ec0\u4e48\u533a\u522b&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e24\u4e2a\u65b9\u6cd5\u90fd\u53ef\u4ee5\u5411\u7ebf\u7a0b\u6c60\u63d0\u4ea4\u4efb\u52a1&#xff0c;\u00a0execute()\u65b9\u6cd5\u7684\u8fd4\u56de\u7c7b\u578b\u662fvoid&#xff0c;\u5b83\u5b9a\u4e49\u5728Executor\u63a5\u53e3\u4e2d,\u00a0\u00a0\u00a0\u00a0\u800csubmit()\u65b9\u6cd5\u53ef\u4ee5\u8fd4\u56de\u6301\u6709\u8ba1\u7b97\u7ed3\u679c\u7684Future\u5bf9\u8c61&#xff0c;\u5b83\u5b9a\u4e49\u5728ExecutorService\u63a5\u53e3\u4e2d&#xff0c;\u5b83\u6269\u5c55\u4e86\u00a0Executor\u63a5\u53e3&#xff0c;\u5176\u5b83\u7ebf\u7a0b\u6c60\u7c7b\u50cfThreadPoolExecutor\u548cScheduledThreadPoolExecutor\u90fd\u6709\u8fd9\u4e9b\u00a0\u00a0\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<h4 id=\"10%E3%80%81%E8%AF%B4%E4%B8%80%E8%AF%B4%E8%87%AA%E5%B7%B1%E5%AF%B9%E4%BA%8E%20synchronized%20%E5%85%B3%E9%94%AE%E5%AD%97%E7%9A%84%E4%BA%86%E8%A7%A3\">10\u3001\u8bf4\u4e00\u8bf4\u81ea\u5df1\u5bf9\u4e8e\u00a0synchronized\u00a0\u5173\u952e\u5b57\u7684\u4e86\u89e3<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0synchronized\u5173\u952e\u5b57\u89e3\u51b3\u7684\u662f\u591a\u4e2a\u7ebf\u7a0b\u4e4b\u95f4\u8bbf\u95ee\u8d44\u6e90\u7684\u540c\u6b65\u6027&#xff0c;synchronized\u5173\u952e\u5b57\u53ef\u4ee5\u4fdd\u8bc1\u88ab\u5b83\u4fee\u9970\u7684\u65b9\u6cd5\u6216\u8005\u4ee3\u7801\u5757\u5728\u4efb\u610f\u65f6\u523b\u53ea\u80fd\u6709\u4e00\u4e2a\u7ebf\u7a0b\u6267\u884c\u3002<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u53e6\u5916&#xff0c;\u5728\u00a0Java 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Lock\u00a0\u6765\u5b9e\u73b0\u7684&#xff0c;Java\u00a0\u7684\u7ebf\u7a0b\u662f\u6620\u5c04\u5230\u64cd\u4f5c\u7cfb\u7edf\u7684\u539f\u751f\u7ebf\u7a0b\u4e4b\u4e0a\u7684\u3002\u5982\u679c\u8981\u6302\u8d77\u6216\u8005\u5524\u9192\u4e00\u00a0\u4e2a\u7ebf\u7a0b&#xff0c;\u90fd\u9700\u8981\u64cd\u4f5c\u7cfb\u7edf\u5e2e\u5fd9\u5b8c\u6210&#xff0c;\u800c\u64cd\u4f5c\u7cfb\u7edf\u5b9e\u73b0\u7ebf\u7a0b\u4e4b\u95f4\u7684\u5207\u6362\u65f6\u9700\u8981\u4ece\u7528\u6237\u6001\u8f6c\u6362\u5230\u5185\u6838\u6001&#xff0c;\u8fd9\u4e2a\u72b6\u6001\u4e4b\u95f4\u7684\u8f6c\u6362\u9700\u8981\u76f8\u5bf9\u6bd4\u8f83\u957f\u7684\u65f6\u95f4&#xff0c;\u65f6\u95f4\u6210\u672c\u76f8\u5bf9\u8f83\u9ad8&#xff0c;\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u65e9\u671f\u7684synchronized \u6548\u7387\u4f4e\u7684\u539f\u56e0\u3002\u5e86\u5e78\u7684\u662f\u5728\u00a0Java 6\u00a0\u4e4b\u540e\u00a0Java\u00a0\u5b98\u65b9\u5bf9\u4ece\u00a0JVM\u00a0\u5c42\u9762\u5bf9synchronized\u00a0\u8f83\u5927\u4f18\u5316&#xff0c;\u6240\u4ee5\u73b0\u5728\u7684\u00a0synchronized\u00a0\u9501\u6548\u7387\u4e5f\u4f18\u5316\u5f97\u5f88\u4e0d\u9519\u4e86\u3002JDK1.6\u5bf9\u9501\u7684\u5b9e\u73b0\u5f15\u5165\u4e86\u5927\u91cf\u7684\u4f18\u00a0\u5316&#xff0c;\u5982\u81ea\u65cb\u9501\u3001\u9002\u5e94\u6027\u81ea\u65cb\u9501\u3001\u9501\u6d88\u9664\u3001\u9501\u7c97\u5316\u3001\u504f\u5411\u9501\u3001\u8f7b\u91cf\u7ea7\u9501\u7b49\u6280\u672f\u6765\u51cf\u5c11\u9501\u64cd\u4f5c\u7684\u5f00\u9500\u3002<\/p>\n<\/p>\n<h4 id=\"11.sleep()%E5%92%8Cwait()%E7%9A%84%E5%8C%BA%E5%88%AB\">11\u3001sleep()\u548cwait()\u7684\u533a\u522b<\/h4>\n<p>\u00a0(1)wait()\u662fObject\u7684\u65b9\u6cd5&#xff0c;sleep()\u662fThread\u7c7b\u7684\u65b9\u6cd5<\/p>\n<p>(2)wait()\u4f1a\u91ca\u653e\u9501&#xff0c;sleep()\u4e0d\u4f1a\u91ca\u653e\u9501<\/p>\n<p>(3)wait()\u8981\u5728\u540c\u6b65\u65b9\u6cd5\u6216\u8005\u540c\u6b65\u4ee3\u7801\u5757\u4e2d\u6267\u884c&#xff0c;sleep()\u6ca1\u6709\u9650\u5236<\/p>\n<p>(4)wait()\u8981\u8c03\u7528notify()\u6216notifyall()\u5524\u9192,sleep()\u81ea\u52a8\u5524\u9192<\/p>\n<\/p>\n<h4 id=\"12%E3%80%81volatile%E5%85%B3%E9%94%AE%E5%AD%97%E7%9A%84%E4%BD%9C%E7%94%A8%EF%BC%9F\">12\u3001volatile\u5173\u952e\u5b57\u7684\u4f5c\u7528&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0volatile\u00a0\u662f Java 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id=\"%E5%9B%9B%E3%80%81Mysql%E7%AF%87\">\u56db\u3001Mysql\u7bc7<\/h3>\n<h4 id=\"1%E3%80%81%E6%95%B0%E6%8D%AE%E5%BA%93%E7%9A%84%E4%B8%89%E8%8C%83%E5%BC%8F%E6%98%AF%E4%BB%80%E4%B9%88\">1\u3001\u6570\u636e\u5e93\u7684\u4e09\u8303\u5f0f\u662f\u4ec0\u4e48<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7b2c\u4e00\u8303\u5f0f&#xff1a;\u5217\u4e0d\u53ef\u518d\u5206<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7b2c\u4e8c\u8303\u5f0f&#xff1a;\u884c\u53ef\u4ee5\u552f\u4e00\u533a\u5206&#xff0c;\u4e3b\u952e\u7ea6\u675f<\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u7b2c\u4e09\u8303\u5f0f&#xff1a;\u8868\u7684\u975e\u4e3b\u5c5e\u6027\u4e0d\u80fd\u4f9d\u8d56\u4e0e \u5176\u4ed6\u8868\u7684\u975e\u4e3b\u5c5e\u6027\u5916\u952e\u7ea6\u675f\u4e14\u4e09\u5927\u8303\u5f0f\u662f\u4e00\u7ea7\u4e00\u7ea7\u4f9d\u8d56\u7684&#xff0c;\u7b2c\u4e8c\u8303\u5f0f\u5efa\u7acb\u5728\u7b2c\u4e00\u8303\u5f0f\u4e0a&#xff0c;\u7b2c\u4e09\u8303\u5f0f\u5efa\u7acb\u7b2c\u4e00\u7b2c\u4e8c\u8303\u5f0f\u4e0a\u3002<\/p>\n<\/p>\n<h4 id=\"2%E3%80%81%E4%BB%80%E4%B9%88%E6%98%AF%E4%BA%8B%E5%8A%A1%EF%BC%9F\">2\u3001\u4ec0\u4e48\u662f\u4e8b\u52a1&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u4e8b\u52a1\u662f\u4e00\u7cfb\u5217\u64cd\u4f5c&#xff0c;\u8fd9\u4e9b\u64cd\u4f5c\u8981\u4e48\u5168\u90e8\u6210\u529f&#xff0c;\u8981\u4e48\u5168\u90e8\u5931\u8d25\u3002\u4e8b\u52a1\u786e\u4fdd\u6570\u636e\u5e93\u7684\u5b8c\u6574\u6027\u3002<\/p>\n<p>\u00a0\u00a0\u539f\u5b50\u6027&#xff1a;\u7ec4\u6210\u4e00\u4e2a\u4e8b\u52a1\u7684\u591a\u4e2a\u6570\u636e\u5e93\u64cd\u4f5c\u662f\u4e00\u4e2a\u4e0d\u53ef\u5206\u5272\u7684\u539f\u5b50\u5355\u5143&#xff0c;\u53ea\u6709\u6240\u6709\u64cd\u4f5c\u90fd\u6210\u529f&#xff0c;\u00a0\u6574\u4e2a\u4e8b\u52a1\u624d\u4f1a\u63d0\u4ea4\u3002\u4efb\u4f55\u4e00\u4e2a\u64cd\u4f5c\u5931\u8d25&#xff0c;\u5df2\u7ecf\u6267\u884c\u7684\u4efb\u4f55\u64cd\u4f5c\u90fd\u5fc5\u987b\u64a4\u9500&#xff0c;\u8ba9\u6570\u636e\u5e93\u8fd4\u56de\u521d\u59cb\u00a0\u72b6\u6001\u3002<\/p>\n<p>\u00a0\u00a0\u4e00\u81f4\u6027&#xff1a;\u4e8b\u52a1\u64cd\u4f5c\u6210\u529f\u540e&#xff0c;\u6570\u636e\u5e93\u6240\u5904\u7684\u72b6\u6001\u548c\u5b83\u7684\u4e1a\u52a1\u89c4\u5219\u662f\u4e00\u81f4\u7684\u3002\u5373\u6570\u636e\u4e0d\u4f1a\u88ab\u7834\u574f\u3002\u00a0\u5982A\u8f6c\u8d26100\u5143\u7ed9B&#xff0c;\u4e0d\u7ba1\u64cd\u4f5c\u662f\u5426\u6210\u529f&#xff0c;A\u548cB\u7684\u8d26\u6237\u603b\u989d\u662f\u4e0d\u53d8\u7684\u3002<\/p>\n<p>\u00a0\u00a0\u9694\u79bb\u6027&#xff1a;\u5728\u5e76\u53d1\u6570\u636e\u64cd\u4f5c\u65f6&#xff0c;\u4e0d\u540c\u7684\u4e8b\u52a1\u62e5\u6709\u5404\u81ea\u7684\u6570\u636e\u7a7a\u95f4&#xff0c;\u5b83\u4eec\u7684\u64cd\u4f5c\u4e0d\u4f1a\u5bf9\u5f7c\u6b64\u4ea7\u751f\u5e72\u00a0\u6270<\/p>\n<p>\u00a0\u00a0\u6301\u4e45\u6027&#xff1a;\u4e00\u65e6\u4e8b\u52a1\u63d0\u4ea4\u6210\u529f&#xff0c;\u4e8b\u52a1\u4e2d\u7684\u6240\u6709\u64cd\u4f5c\u90fd\u5fc5\u987b\u6301\u4e45\u5316\u5230\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n<\/p>\n<h4 id=\"3%E3%80%81%E4%BA%8B%E5%8A%A1%E7%9A%84%E9%9A%94%E7%A6%BB%E7%BA%A7%E5%88%AB%E6%9C%89%E5%93%AA%E4%BA%9B%EF%BC%9F\">3\u3001\u4e8b\u52a1\u7684\u9694\u79bb\u7ea7\u522b\u6709\u54ea\u4e9b&#xff1f;<\/h4>\n<p>\u4e8b\u52a1\u7684\u9694\u79bb\u7ea7\u522b\u6709\u4ee5\u4e0b\u51e0\u79cd&#xff1a;<\/p>\n<p>READ UNCOMMITTED&#xff1a;\u8bfb\u53d6\u672a\u63d0\u4ea4&#xff0c;\u5141\u8bb8\u8bfb\u53d6\u672a\u63d0\u4ea4\u7684\u4e8b\u52a1\u6570\u636e&#xff0c;\u53ef\u80fd\u4f1a\u51fa\u73b0\u810f\u8bfb\u3002<\/p>\n<p>READ COMMITTED&#xff1a;\u8bfb\u53d6\u5df2\u63d0\u4ea4&#xff0c;\u53ea\u80fd\u8bfb\u53d6\u5df2\u63d0\u4ea4\u7684\u4e8b\u52a1\u6570\u636e&#xff0c;\u907f\u514d\u4e86\u810f\u8bfb&#xff0c;\u4f46\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e0d\u53ef\u91cd\u590d\u8bfb\u3002<\/p>\n<p>REPEATABLE READ&#xff1a;\u53ef\u91cd\u590d\u8bfb&#xff0c;\u786e\u4fdd\u5728\u540c\u4e00\u4e2a\u4e8b\u52a1\u4e2d\u591a\u6b21\u8bfb\u53d6\u540c\u4e00\u6570\u636e\u65f6&#xff0c;\u7ed3\u679c\u4e00\u81f4&#xff0c;\u907f\u514d\u4e86\u4e0d\u53ef\u91cd\u590d\u8bfb&#xff0c;\u4f46\u53ef\u80fd\u4f1a\u51fa\u73b0\u5e7b\u8bfb\u3002<\/p>\n<p>SERIALIZABLE&#xff1a;\u53ef\u4e32\u884c\u5316&#xff0c;\u6700\u9ad8\u7684\u9694\u79bb\u7ea7\u522b&#xff0c;\u907f\u514d\u4e86\u810f\u8bfb\u3001\u4e0d\u53ef\u91cd\u590d\u8bfb\u548c\u5e7b\u8bfb&#xff0c;\u4f46\u6027\u80fd\u5f00\u9500\u6700\u5927\u3002<\/p>\n<table border=\"1\" cellspacing=\"0\">\n<tbody>\n<tr>\n<td>\n<p>\u9694\u79bb\u7ea7\u522b<\/p>\n<\/td>\n<td>\n<p>\u810f\u8bfb<\/p>\n<\/td>\n<td>\n<p>\u4e0d\u53ef\u91cd\u590d\u8bfb<\/p>\n<\/td>\n<td>\n<p>\u5e7b\u5f71\u8bfb<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u8bfb\u672a\u63d0\u4ea4\u00a0\u00a0READ-UNCOMMITTED<\/p>\n<\/td>\n<td>\n<p>\u221a<\/p>\n<\/td>\n<td>\n<p>\u221a<\/p>\n<\/td>\n<td>\n<p>\u221a<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u8bfb\u63d0\u4ea4\u00a0\u00a0READ-COMMITTED<\/p>\n<\/td>\n<td>\n<p>\u00d7<\/p>\n<\/td>\n<td>\n<p>\u221a<\/p>\n<\/td>\n<td>\n<p>\u221a<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u53ef\u91cd\u590d\u8bfb\u00a0\u00a0REPEATABLE-READ<\/p>\n<\/td>\n<td>\n<p>\u00d7<\/p>\n<\/td>\n<td>\n<p>\u00d7<\/p>\n<\/td>\n<td>\n<p>\u221a<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>\u4e32\u884c\u5316\u00a0\u00a0SERIALIZABLE<\/p>\n<\/td>\n<td>\n<p>\u00d7<\/p>\n<\/td>\n<td>\n<p>\u00d7<\/p>\n<\/td>\n<td>\n<p>\u00d7<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4 id=\"4%E3%80%81%E5%A6%82%E4%BD%95%E4%BC%98%E5%8C%96%20SQL%20%E6%9F%A5%E8%AF%A2%EF%BC%9F\">4\u3001\u5982\u4f55\u4f18\u5316 SQL \u67e5\u8be2&#xff1f;<\/h4>\n<p>\u7d22\u5f15&#xff1a;\u4e3a\u7ecf\u5e38\u67e5\u8be2\u7684\u5217\u521b\u5efa\u7d22\u5f15&#xff0c;\u53ef\u4ee5\u52a0\u5feb\u67e5\u8be2\u901f\u5ea6\u3002<\/p>\n<p>\u67e5\u8be2\u4f18\u5316&#xff1a;\u907f\u514d\u4f7f\u7528\u00a0SELECT *&#xff0c;\u53ea\u67e5\u8be2\u9700\u8981\u7684\u5217&#xff1b;\u4f7f\u7528\u00a0EXPLAIN\u00a0\u5206\u6790\u67e5\u8be2\u8ba1\u5212&#xff0c;\u4f18\u5316\u590d\u6742\u7684\u67e5\u8be2\u3002<\/p>\n<p>\u5206\u9875\u67e5\u8be2&#xff1a;\u4f7f\u7528\u00a0LIMIT\u00a0\u548c\u00a0OFFSET\u00a0\u8fdb\u884c\u5206\u9875\u67e5\u8be2&#xff0c;\u51cf\u5c11\u6570\u636e\u4f20\u8f93\u91cf\u3002<\/p>\n<p>\u907f\u514d\u5b50\u67e5\u8be2&#xff1a;\u5c3d\u91cf\u4f7f\u7528\u00a0JOIN\u00a0\u66ff\u4ee3\u5b50\u67e5\u8be2&#xff0c;\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u3002<\/p>\n<\/p>\n<h4 id=\"5%E3%80%81%E5%A6%82%E4%BD%95%E4%BC%98%E5%8C%96%E6%95%B0%E6%8D%AE%E5%BA%93%E8%A1%A8%E7%BB%93%E6%9E%84%EF%BC%9F\">5\u3001\u5982\u4f55\u4f18\u5316\u6570\u636e\u5e93\u8868\u7ed3\u6784&#xff1f;<\/h4>\n<p>\u8303\u5f0f\u5316&#xff1a;\u9075\u5faa\u6570\u636e\u5e93\u8303\u5f0f&#xff0c;\u51cf\u5c11\u6570\u636e\u5197\u4f59&#xff0c;\u63d0\u9ad8\u6570\u636e\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u53cd\u8303\u5f0f\u5316&#xff1a;\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b&#xff0c;\u9002\u5f53\u7684\u6570\u636e\u5197\u4f59\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd&#xff0c;\u4f46\u9700\u8981\u6743\u8861\u3002<\/p>\n<p>\u5206\u533a&#xff1a;\u5bf9\u5927\u8868\u8fdb\u884c\u5206\u533a&#xff0c;\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8be2\u548c\u7ef4\u62a4\u6548\u7387\u3002<\/p>\n<\/p>\n<h4 id=\"6%E3%80%81%E5%A6%82%E4%BD%95%E4%BC%98%E5%8C%96%E6%95%B0%E6%8D%AE%E5%BA%93%E8%BF%9E%E6%8E%A5%EF%BC%9F\">6\u3001\u5982\u4f55\u4f18\u5316\u6570\u636e\u5e93\u8fde\u63a5&#xff1f;<\/h4>\n<p>\u8fde\u63a5\u6c60&#xff1a;\u4f7f\u7528\u8fde\u63a5\u6c60&#xff08;\u5982 HikariCP\u3001DBCP\u3001C3P0&#xff09;\u7ba1\u7406\u6570\u636e\u5e93\u8fde\u63a5&#xff0c;\u51cf\u5c11\u8fde\u63a5\u7684\u521b\u5efa\u548c\u9500\u6bc1\u5f00\u9500\u3002<\/p>\n<p>\u8fde\u63a5\u590d\u7528&#xff1a;\u5408\u7406\u914d\u7f6e\u8fde\u63a5\u6c60\u53c2\u6570&#xff0c;\u786e\u4fdd\u8fde\u63a5\u7684\u590d\u7528\u3002<\/p>\n<\/p>\n<h4 id=\"7%E3%80%81%E5%A6%82%E4%BD%95%E5%A4%84%E7%90%86%E6%95%B0%E6%8D%AE%E5%BA%93%E7%9A%84%E9%AB%98%E5%B9%B6%E5%8F%91%E9%97%AE%E9%A2%98%EF%BC%9F\">7\u3001\u5982\u4f55\u5904\u7406\u6570\u636e\u5e93\u7684\u9ad8\u5e76\u53d1\u95ee\u9898&#xff1f;<\/h4>\n<p>\u8bfb\u5199\u5206\u79bb&#xff1a;\u5c06\u8bfb\u64cd\u4f5c\u548c\u5199\u64cd\u4f5c\u5206\u79bb\u5230\u4e0d\u540c\u7684\u6570\u636e\u5e93\u5b9e\u4f8b&#xff0c;\u63d0\u9ad8\u8bfb\u5199\u6027\u80fd\u3002<\/p>\n<p>\u7f13\u5b58&#xff1a;\u4f7f\u7528\u7f13\u5b58&#xff08;\u5982\u00a0Redis&#xff09;\u51cf\u5c11\u6570\u636e\u5e93\u7684\u8bfb\u53d6\u538b\u529b\u3002<\/p>\n<p>\u5206\u5e93\u5206\u8868&#xff1a;\u5c06\u6570\u636e\u5206\u6563\u5230\u591a\u4e2a\u6570\u636e\u5e93\u6216\u8868\u4e2d&#xff0c;\u63d0\u9ad8\u5e76\u53d1\u5904\u7406\u80fd\u529b\u3002<\/p>\n<p>\u6d88\u606f\u961f\u5217&#xff1a;\u4f7f\u7528\u6d88\u606f\u961f\u5217&#xff08;\u5982 Kafka&#xff09;\u5f02\u6b65\u5904\u7406\u6570\u636e&#xff0c;\u51cf\u5c11\u6570\u636e\u5e93\u7684\u5199\u5165\u538b\u529b\u3002<\/p>\n<\/p>\n<h4 id=\"8%E3%80%81%C2%A0SQL%E4%BC%98%E5%8C%96%E6%89%8B%E6%AE%B5%E6%9C%89%E5%93%AA%E4%BA%9B\">8\u3001\u00a0SQL\u4f18\u5316\u624b\u6bb5\u6709\u54ea\u4e9b<\/h4>\n<p>1\u3001\u67e5\u8be2\u8bed\u53e5\u4e2d\u4e0d\u8981\u4f7f\u7528select *<\/p>\n<p>2\u3001\u5c3d\u91cf\u51cf\u5c11\u5b50\u67e5\u8be2&#xff0c;\u4f7f\u7528\u5173\u8054\u67e5\u8be2&#xff08;left join,right join,inner join&#xff09;\u66ff\u4ee3<\/p>\n<p>3\u3001\u51cf\u5c11\u4f7f\u7528IN\u6216\u8005NOT IN ,\u4f7f\u7528exists\u00a0&#xff0c;not exists\u6216\u8005\u5173\u8054\u67e5\u8be2\u8bed\u53e5\u66ff\u4ee3<\/p>\n<p>4\u3001or\u00a0\u7684\u67e5\u8be2\u5c3d\u91cf\u7528\u00a0union\u6216\u8005union all\u00a0\u4ee3\u66ff(\u5728\u786e\u8ba4\u6ca1\u6709\u91cd\u590d\u6570\u636e\u6216\u8005\u4e0d\u7528\u5254\u9664\u91cd\u590d\u6570\u636e\u65f6&#xff0c;\u00a0union all\u4f1a\u66f4\u597d)<\/p>\n<p>5\u3001\u5e94\u5c3d\u91cf\u907f\u514d\u5728\u00a0where\u00a0\u5b50\u53e5\u4e2d\u4f7f\u7528!&#061;\u6216&lt;&gt;\u64cd\u4f5c\u7b26&#xff0c;\u5426\u5219\u5c06\u5f15\u64ce\u653e\u5f03\u4f7f\u7528\u7d22\u5f15\u800c\u8fdb\u884c\u5168\u8868\u626b\u63cf\u3002<\/p>\n<p>6\u3001\u5e94\u5c3d\u91cf\u907f\u514d\u5728\u00a0where\u00a0\u5b50\u53e5\u4e2d\u5bf9\u5b57\u6bb5\u8fdb\u884c\u00a0null\u00a0\u503c\u5224\u65ad&#xff0c;\u5426\u5219\u5c06\u5bfc\u81f4\u5f15\u64ce\u653e\u5f03\u4f7f\u7528\u7d22\u5f15\u800c\u8fdb\u884c\u5168\u8868\u00a0\u626b\u63cf&#xff0c;\u5982&#xff1a;\u00a0\u00a0select id from t where num is null\u00a0\u53ef\u4ee5\u5728num\u4e0a\u8bbe\u7f6e\u9ed8\u8ba4\u503c0&#xff0c;\u786e\u4fdd\u8868\u4e2dnum\u5217\u6ca1\u6709\u00a0\u00a0null\u503c&#xff0c;\u7136\u540e\u8fd9\u6837\u67e5\u8be2&#xff1a;\u00a0\u00a0select id from t where num&#061;0<\/p>\n<\/p>\n<h4 id=\"9%E3%80%81%E7%AE%80%E5%8D%95%E8%AF%B4%E4%B8%80%E8%AF%B4drop%E3%80%81%20delete%E4%B8%8Etruncate%E7%9A%84%E5%8C%BA%E5%88%AB\">9\u3001\u7b80\u5355\u8bf4\u4e00\u8bf4drop\u3001\u00a0delete\u4e0etruncate\u7684\u533a\u522b<\/h4>\n<p>SQL\u4e2d\u7684drop\u3001delete\u3001truncate\u90fd\u8868\u793a\u5220\u9664&#xff0c;\u4f46\u662f\u4e09\u8005\u6709\u4e00\u4e9b\u5dee\u522b<\/p>\n<p>delete\u548ctruncate\u53ea\u5220\u9664\u8868\u7684\u6570\u636e\u4e0d\u5220\u9664\u8868\u7684\u7ed3\u6784 \u901f\u5ea6,\u4e00\u822c\u6765\u8bf4:\u00a0drop&gt; truncate &gt;delete delete\u00a0\u8bed\u53e5\u662fdml,\u8fd9\u4e2a\u64cd\u4f5c\u4f1a\u653e\u5230rollback segement\u4e2d,\u4e8b\u52a1\u63d0\u4ea4\u4e4b\u540e\u624d\u751f\u6548;\u00a0\u5982\u679c\u6709\u76f8\u5e94\u7684trigger,\u6267\u884c\u00a0\u7684\u65f6\u5019\u5c06\u88ab\u89e6\u53d1.\u00a0truncate,drop\u662fddl,\u00a0\u64cd\u4f5c\u7acb\u5373\u751f\u6548,\u539f\u6570\u636e\u4e0d\u653e\u5230rollback segment\u4e2d,\u4e0d\u80fd\u56de\u6eda.\u00a0\u64cd\u4f5c\u4e0d\u89e6\u53d1trigger\u3002<\/p>\n<\/p>\n<h4 id=\"10%E3%80%81%E4%BB%80%E4%B9%88%E6%98%AF%E8%A7%86%E5%9B%BE%EF%BC%9F\">10\u3001\u4ec0\u4e48\u662f\u89c6\u56fe&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u89c6\u56fe\u662f\u4e00\u79cd\u865a\u62df\u7684\u8868&#xff0c;\u5177\u6709\u548c\u7269\u7406\u8868\u76f8\u540c\u7684\u529f\u80fd\u3002\u53ef\u4ee5\u5bf9\u89c6\u56fe\u8fdb\u884c\u589e&#xff0c;\u6539&#xff0c;\u67e5&#xff0c;\u64cd\u4f5c&#xff0c;\u8bd5\u56fe\u901a\u5e38\u662f \u6709\u4e00\u4e2a\u8868\u6216\u8005\u591a\u4e2a\u8868\u7684\u884c\u6216\u5217\u7684\u5b50\u96c6\u3002\u5bf9\u89c6\u56fe\u7684\u4fee\u6539\u4e0d\u5f71\u54cd\u57fa\u672c\u8868\u3002\u5b83\u4f7f\u5f97\u6211\u4eec\u83b7\u53d6\u6570\u636e\u66f4\u5bb9\u6613&#xff0c; \u76f8\u6bd4\u591a\u8868\u67e5\u8be2\u3002<\/p>\n<\/p>\n<h4 id=\"11%E3%80%81%20%E4%BB%80%E4%B9%88%E6%98%AF%E5%86%85%E8%81%94%E6%8E%A5%E3%80%81%E5%B7%A6%E5%A4%96%E8%81%94%E6%8E%A5%E3%80%81%E5%8F%B3%E5%A4%96%E8%81%94%E6%8E%A5%EF%BC%9F\">11\u3001 \u4ec0\u4e48\u662f\u5185\u8054\u63a5\u3001\u5de6\u5916\u8054\u63a5\u3001\u53f3\u5916\u8054\u63a5&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u5185\u8054\u63a5&#xff08;Inner Join&#xff09;&#xff1a;\u5339\u914d2\u5f20\u8868\u4e2d\u76f8\u5173\u8054\u7684\u8bb0\u5f55\u3002<\/p>\n<p>\u00a0\u00a0\u5de6\u5916\u8054\u63a5&#xff08;Left Outer Join&#xff09;&#xff1a;\u9664\u4e86\u5339\u914d2\u5f20\u8868\u4e2d\u76f8\u5173\u8054\u7684\u8bb0\u5f55\u5916&#xff0c;\u8fd8\u4f1a\u5339\u914d\u5de6\u8868\u4e2d\u5269\u4f59\u7684\u8bb0\u00a0\u5f55&#xff0c;\u53f3\u8868\u4e2d\u672a\u5339\u914d\u5230\u7684\u5b57\u6bb5\u7528NULL\u8868\u793a\u3002<\/p>\n<p>\u00a0\u00a0\u53f3\u5916\u8054\u63a5&#xff08;Right Outer Join&#xff09;&#xff1a;\u9664\u4e86\u5339\u914d2\u5f20\u8868\u4e2d\u76f8\u5173\u8054\u7684\u8bb0\u5f55\u5916&#xff0c;\u8fd8\u4f1a\u5339\u914d\u53f3\u8868\u4e2d\u5269\u4f59\u7684\u8bb0\u00a0 \u5f55&#xff0c;\u5de6\u8868\u4e2d\u672a\u5339\u914d\u5230\u7684\u5b57\u6bb5\u7528NULL\u8868\u793a\u3002\u5728\u5224\u5b9a\u5de6\u8868\u548c\u53f3\u8868\u65f6&#xff0c;\u8981\u6839\u636e\u8868\u540d\u51fa\u73b0\u5728Outer Join\u00a0\u7684\u5de6\u53f3\u4f4d\u7f6e\u5173\u7cfb\u3002<\/p>\n<\/p>\n<h4 id=\"12%E3%80%81%E5%A4%A7%E8%A1%A8%E5%A6%82%E4%BD%95%E4%BC%98%E5%8C%96%EF%BC%9F\">12\u3001\u5927\u8868\u5982\u4f55\u4f18\u5316&#xff1f;<\/h4>\n<p>\u5f53MySQL\u5355\u8868\u8bb0\u5f55\u6570\u8fc7\u5927\u65f6&#xff0c;\u6570\u636e\u5e93\u7684CRUD\u6027\u80fd\u4f1a\u660e\u663e\u4e0b\u964d&#xff0c;\u4e00\u4e9b\u5e38\u89c1\u7684\u4f18\u5316\u63aa\u65bd\u5982\u4e0b&#xff1a;<\/p>\n<p>1.\u00a0\u9650\u5b9a\u6570\u636e\u7684\u8303\u56f4<\/p>\n<p>\u52a1\u5fc5\u7981\u6b62\u4e0d\u5e26\u4efb\u4f55\u9650\u5236\u6570\u636e\u8303\u56f4\u6761\u4ef6\u7684\u67e5\u8be2\u8bed\u53e5\u3002\u6bd4\u5982&#xff1a;\u6211\u4eec\u5f53\u7528\u6237\u5728\u67e5\u8be2\u8ba2\u5355\u5386\u53f2\u7684\u65f6\u5019&#xff0c;\u6211\u4eec\u00a0\u53ef\u4ee5\u63a7\u5236\u5728\u4e00\u4e2a\u6708\u7684\u8303\u56f4\u5185&#xff1b;<\/p>\n<p>2.\u00a0\u8bfb\/\u5199\u5206\u79bb<\/p>\n<p>\u7ecf\u5178\u7684\u6570\u636e\u5e93\u62c6\u5206\u65b9\u6848&#xff0c;\u4e3b\u5e93\u8d1f\u8d23\u5199&#xff0c;\u4ece\u5e93\u8d1f\u8d23\u8bfb&#xff1b;<\/p>\n<p>3.\u00a0\u5782\u76f4\u5206\u533a<\/p>\n<p>\u6839\u636e\u6570\u636e\u5e93\u91cc\u9762\u6570\u636e\u8868\u7684\u76f8\u5173\u6027\u8fdb\u884c\u62c6\u5206\u3002\u00a0\u00a0\u00a0\u4f8b\u5982&#xff0c;\u7528\u6237\u8868\u4e2d\u65e2\u6709\u7528\u6237\u7684\u767b\u5f55\u4fe1\u606f\u53c8\u6709\u7528\u6237\u7684\u57fa\u672c\u4fe1\u00a0\u606f&#xff0c;\u53ef\u4ee5\u5c06\u7528\u6237\u8868\u62c6\u5206\u6210\u4e24\u4e2a\u5355\u72ec\u7684\u8868&#xff0c;\u751a\u81f3\u653e\u5230\u5355\u72ec\u7684\u5e93\u505a\u5206\u5e93\u3002<\/p>\n<p>\u7b80\u5355\u6765\u8bf4\u5782\u76f4\u62c6\u5206\u662f\u6307\u6570\u636e\u8868\u5217\u7684\u62c6\u5206&#xff0c;\u628a\u4e00\u5f20\u5217\u6bd4\u8f83\u591a\u7684\u8868\u62c6\u5206\u4e3a\u591a\u5f20\u8868\u3002<\/p>\n<p>4.\u00a0\u6c34\u5e73\u5206\u533a<\/p>\n<p>\u4fdd\u6301\u6570\u636e\u8868\u7ed3\u6784\u4e0d\u53d8&#xff0c;\u901a\u8fc7\u67d0\u79cd\u7b56\u7565\u5b58\u50a8\u6570\u636e\u5206\u7247\u3002\u8fd9\u6837\u6bcf\u4e00\u7247\u6570\u636e\u5206\u6563\u5230\u4e0d\u540c\u7684\u8868\u6216\u8005\u5e93\u4e2d&#xff0c;\u8fbe\u00a0\u5230\u4e86\u5206\u5e03\u5f0f\u7684\u76ee\u7684\u3002\u00a0\u00a0 \u6c34\u5e73\u62c6\u5206\u53ef\u4ee5\u652f\u6491\u975e\u5e38\u5927\u7684\u6570\u636e\u91cf\u3002<\/p>\n<\/p>\n<h4 id=\"18.char%E5%92%8Cvarchar%E7%9A%84%E5%8C%BA%E5%88%AB\">13\u3001char\u548cvarchar\u7684\u533a\u522b<\/h4>\n<p>char\u662f\u4e0d\u53ef\u53d8\u7684&#xff0c;\u6700\u5927\u957f\u5ea6\u4e3a255&#xff0c;varchar\u662f\u53ef\u53d8\u7684\u5b57\u7b26\u4e32&#xff0c;\u6700\u5927\u957f\u5ea6\u4e3a2^16<\/p>\n<\/p>\n<h3 id=\"%E4%BA%94%E3%80%81SpringBoot%E7%AF%87\">\u4e94\u3001SpringBoot\u7bc7<\/h3>\n<\/p>\n<h4 id=\"1%E3%80%81%E7%AE%80%E5%8D%95%E8%AF%B4%E8%AF%B4%E4%BB%80%E4%B9%88%E6%98%AF%20Spring%20Boot%EF%BC%9F\">1\u3001\u7b80\u5355\u8bf4\u8bf4\u4ec0\u4e48\u662f Spring Boot&#xff1f;<\/h4>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Spring Boot \u662f\u7531 Pivotal \u56e2\u961f\u63d0\u4f9b\u7684\u57fa\u4e8e Spring \u6846\u67b6\u7684\u5168\u65b0\u6846\u67b6&#xff0c;\u65e8\u5728\u7b80\u5316 Spring \u5e94\u7528\u7684\u521d\u59cb\u642d\u5efa\u4ee5\u53ca\u5f00\u53d1\u8fc7\u7a0b\u3002\u5b83\u901a\u8fc7\u63d0\u4f9b\u4e00\u7cfb\u5217\u9ed8\u8ba4\u914d\u7f6e\u6765\u5feb\u901f\u542f\u52a8\u548c\u8fd0\u884c Spring \u5e94\u7528&#xff0c;\u540c\u65f6\u5141\u8bb8\u5f00\u53d1\u8005\u901a\u8fc7\u5c11\u91cf\u7684\u914d\u7f6e\u6765\u8986\u76d6\u9ed8\u8ba4\u8bbe\u7f6e\u3002<\/p>\n<p>\u4e3b\u8981\u4f18\u70b9&#xff1a;<\/p>\n<p>\u5feb\u901f\u642d\u5efa&#xff1a;\u63d0\u4f9b\u4e86\u5927\u91cf\u81ea\u52a8\u914d\u7f6e&#xff0c;\u53ef\u4ee5\u5feb\u901f\u542f\u52a8\u548c\u8fd0\u884c Spring \u5e94\u7528\u3002<\/p>\n<p>\u72ec\u7acb\u8fd0\u884c&#xff1a;\u5185\u5d4cTomcat\u3001Jetty \u7b49\u5bb9\u5668&#xff0c;\u65e0\u9700\u90e8\u7f72 WAR \u6587\u4ef6\u3002<\/p>\n<p>\u7b80\u5316\u914d\u7f6e&#xff1a;\u901a\u8fc7\u00a0application.properties\u00a0\u6216\u00a0application.yml\u00a0\u6587\u4ef6\u7b80\u5316\u914d\u7f6e\u7ba1\u7406\u3002<\/p>\n<p>\u81ea\u52a8\u914d\u7f6e&#xff1a;\u6839\u636e\u7c7b\u8def\u5f84\u4e2d\u7684\u5e93\u81ea\u52a8\u914d\u7f6e Spring \u5e94\u7528\u3002<\/p>\n<p>\u751f\u4ea7\u5c31\u7eea&#xff1a;\u63d0\u4f9b\u751f\u4ea7\u5c31\u7eea\u7684\u529f\u80fd&#xff0c;\u5982\u6027\u80fd\u6307\u6807\u3001\u5065\u5eb7\u68c0\u67e5\u548c\u5916\u90e8\u5316\u914d\u7f6e\u3002<\/p>\n<\/p>\n<h4 id=\"2%E3%80%81springboot%E8%87%AA%E5%8A%A8%E9%85%8D%E7%BD%AE%E5%8E%9F%E7%90%86\">2\u3001springboot\u81ea\u52a8\u914d\u7f6e\u539f\u7406<\/h4>\n<p> \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5728spring\u2014boot\u2014autoconfigura\u5305\u4e0b\u5b58\u653e\u4e86spring\u5185\u7f6e\u7684\u81ea\u52a8\u914d\u7f6e\u7c7b\u548cspring.factories\u6587\u4ef6&#xff0c;\u8fd9\u4e2a\u6587\u4ef6\u4e2d\u5b58\u653e\u4e86\u8fd9\u4e9b\u914d\u7f6e\u7c7b\u7684\u5168\u7c7b\u540d &#xff1b;<\/p>\n<p>\u542f\u52a8\u7c7b&#064;SpringbootApplication\u6ce8\u89e3\u4e0b&#xff0c;\u6709\u4e09\u4e2a\u5173\u952e\u6ce8\u89e3<\/p>\n<p>&#xff08;1&#xff09;&#064;springbootConfiguration:\u8868\u793a\u542f\u52a8\u7c7b\u662f\u4e00\u4e2a\u81ea\u52a8\u914d\u7f6e\u7c7b<\/p>\n<p>&#xff08;2&#xff09;&#064;CompontScan:\u626b\u63cf\u542f\u52a8\u7c7b\u6240\u5728\u5305\u4e0b\u53ca\u5b50\u5305\u7684\u7ec4\u4ef6\u5230\u5bb9\u5668\u4e2d<\/p>\n<p>&#xff08;3&#xff09;&#064;EnableConfigutarion&#xff0c;\u4e0b\u9762\u6709\u4e2a\u5b50\u6ce8\u89e3&#064;Import\u4f1a\u5bfc\u5165\u4e0a\u9762\u6240\u8bf4\u7684\u81ea\u52a8\u914d\u7f6e\u7c7b&#xff0c;\u8fd9\u4e9b\u914d\u7f6e\u7c7b\u4f1a\u6839\u636e\u5143\u6ce8\u89e3\u7684\u88c5\u914d\u6761\u4ef6\u751f\u6548&#xff0c;\u751f\u6548\u7684\u7c7b\u5c31\u4f1a\u88ab\u5b9e\u4f8b\u5316&#xff0c;\u52a0\u8f7d\u5230ioc\u5bb9\u5668\u4e2d&#xff1b;\u8fd9\u4e9b\u81ea\u52a8\u914d\u7f6e\u7c7b\u8fd8\u4f1a\u901a\u8fc7xxxProperties\u6587\u4ef6\u91cc\u914d\u7f6e\u6765\u8fdb\u884c\u5c5e\u6027\u8bbe\u503c\u3002<\/p>\n<\/p>\n<h4 id=\"3%E3%80%81springboot%E5%B8%B8%E7%94%A8%E6%B3%A8%E8%A7%A3\">3\u3001springboot\u5e38\u7528\u6ce8\u89e3<\/h4>\n<p> &#064;RestController \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0&#xff1a;\u4fee\u9970\u7c7b&#xff0c;\u8be5\u63a7\u5236\u5668\u4f1a\u8fd4\u56deJson\u6570\u636e\u00a0<\/p>\n<p>&#064;RequestMapping(&#034;\/path&#034;) &#xff1a;\u4fee\u9970\u7c7b&#xff0c;\u8be5\u63a7\u5236\u5668\u7684\u8bf7\u6c42\u8def\u5f84<\/p>\n<p>&#064;Autowired \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 : \u00a0\u4fee\u9970\u5c5e\u6027&#xff0c;\u6309\u7167\u7c7b\u578b\u8fdb\u884c\u4f9d\u8d56\u6ce8\u5165<\/p>\n<p>&#064;PathVariable \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 : \u00a0\u4fee\u9970\u53c2\u6570&#xff0c;\u5c06\u8def\u5f84\u503c\u6620\u5c04\u5230\u53c2\u6570\u4e0a<\/p>\n<p>&#064;ResponseBody \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 :\u4fee\u9970\u65b9\u6cd5&#xff0c;\u8be5\u65b9\u6cd5\u4f1a\u8fd4\u56deJson\u6570\u636e<\/p>\n<p>&#064;RequestBody&#xff08;\u9700\u8981\u4f7f\u7528Post\u63d0\u4ea4\u65b9\u5f0f&#xff09; :\u4fee\u9970\u53c2\u6570&#xff0c;\u5c06Json\u6570\u636e\u5c01\u88c5\u5230\u5bf9\u5e94\u53c2\u6570\u4e2d &#064;Controller&#064;Service&#064;Compont: \u00a0\u5c06\u7c7b\u6ce8\u518c\u5230ioc\u5bb9\u5668<\/p>\n<p>&#064;Transaction&#xff1a;\u5f00\u542f\u4e8b\u52a1<\/p>\n<\/p>\n<h4 id=\"4%E3%80%81Actuator%20%E7%9A%84%E4%BD%9C%E7%94%A8%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F%E5%B8%B8%E7%94%A8%E7%9A%84%E7%AB%AF%E7%82%B9%E6%9C%89%E5%93%AA%E4%BA%9B%EF%BC%9F\">4\u3001Actuator \u7684\u4f5c\u7528\u662f\u4ec0\u4e48&#xff1f;\u5e38\u7528\u7684\u7aef\u70b9\u6709\u54ea\u4e9b&#xff1f; 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id=\"6%E3%80%81Spring%20Boot%20%E5%92%8C%20Spring%20MVC%20%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%EF%BC%9F\">6\u3001Spring Boot \u548c Spring MVC \u6709\u4ec0\u4e48\u533a\u522b&#xff1f; \u00a0<\/h4>\n<ul>\n<li>\n<p>Spring MVC\u00a0\u662f\u4e00\u4e2a Web \u6846\u67b6&#xff0c;\u9700\u624b\u52a8\u914d\u7f6e DispatcherServlet\u3001\u89c6\u56fe\u89e3\u6790\u5668\u7b49\u3002<\/p>\n<\/li>\n<li>\n<p>Spring Boot\u00a0\u662f Spring \u7684\u6269\u5c55&#xff0c;\u901a\u8fc7\u81ea\u52a8\u914d\u7f6e\u548c\u5185\u5d4c\u670d\u52a1\u5668\u7b80\u5316 Spring 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cellspacing=\"0\">\n<tbody>\n<tr>\n<td>\n<p>string<\/p>\n<\/td>\n<td>\n<p>\u5b57\u7b26\u4e32&#xff08;\u4e00\u4e2a\u5b57\u7b26\u4e32\u7c7b\u578b\u6700\u5927\u5b58\u50a8\u5bb9\u91cf\u4e3a512M&#xff09;<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>list<\/p>\n<\/td>\n<td>\n<p>\u53ef\u4ee5\u91cd\u590d\u7684\u96c6\u5408<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>set<\/p>\n<\/td>\n<td>\n<p>\u4e0d\u53ef\u4ee5\u91cd\u590d\u7684\u96c6\u5408<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>hash<\/p>\n<\/td>\n<td>\n<p>\u7c7b\u4f3c\u4e8eMap&lt;String,String&gt;<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td>\n<p>zset(sorted set&#xff09;<\/p>\n<\/td>\n<td>\n<p>\u5e26\u5206\u6570\u7684set<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4 id=\"12.Redis%E5%86%85%E5%AD%98%E6%B7%98%E6%B1%B0%E7%AD%96%E7%95%A5\">3\u3001Redis\u5185\u5b58\u6dd8\u6c70\u7b56\u7565<\/h4>\n<p>\u5f53\u5185\u5b58\u4e0d\u8db3\u65f6\u6309\u8bbe\u5b9a\u597d\u7684\u7b56\u7565\u8fdb\u884c\u6dd8\u6c70&#xff0c;\u7b56\u7565\u6709<\/p>\n<p>Redis \u63d0\u4f9b 6 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