{"id":202711,"date":"2025-05-22T09:15:33","date_gmt":"2025-05-22T01:15:33","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202711\/"},"modified":"2025-05-22T09:15:33","modified_gmt":"2025-05-22T01:15:33","slug":"%e5%89%96%e6%9e%90-java-%e5%87%bd%e6%95%b0%e6%80%a7%e8%83%bd%e7%93%b6%e9%a2%88%e7%9a%84%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202711\/","title":{"rendered":"\u5256\u6790 Java \u51fd\u6570\u6027\u80fd\u74f6\u9888\u7684\u6307\u5357"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5256\u6790 Java \u51fd\u6570\u6027\u80fd\u74f6\u9888\u7684\u6307\u5357<\/h1>\n<p>\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u8981\u52aa\u529b\uff0c\u4f46\u662f\u4e0d\u8981\u6025\uff01\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u5256\u6790 Java \u51fd\u6570\u6027\u80fd\u74f6\u9888\u7684\u6307\u5357\u300b<\/span>\u5c06\u4f1a\u4ecb\u7ecd\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u60f3\u6df1\u5165\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\uff0c\u53ef\u4ee5\u5173\u6ce8\u6211\uff01\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\u7684\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u80fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<p>Java \u51fd\u6570\u6027\u80fd\u74f6\u9888\u4f18\u5316\u6307\u5357\uff1a\u8bc6\u522b\u74f6\u9888\uff1a\u4f7f\u7528\u5de5\u5177\u5206\u6790\u6267\u884c\u3001\u76d1\u63a7\u6307\u6807\u548c\u5ba1\u67e5\u4ee3\u7801\u3002\u4f18\u5316\u4ee3\u7801\uff1a\u907f\u514d\u5bf9\u8c61\u521b\u5efa\u3001\u4f7f\u7528\u9ad8\u6548\u6570\u636e\u7ed3\u6784\u3001\u907f\u514d\u5d4c\u5957\u3001\u4f7f\u7528\u5e76\u884c\u5904\u7406\u3002\u5b9e\u6218\u6848\u4f8b\uff1a\u4f18\u5316\u5b57\u7b26\u4e32\u8fde\u63a5\uff0c\u4f7f\u7528 StringBuilder \u800c\u4e0d\u662f +=\u3002\u5176\u4ed6\u6280\u672f\uff1a\u7f13\u5b58\u3001\u51fd\u6570\u7f29\u5c0f\u3001\u4f18\u5316 I\/O \u64cd\u4f5c\u3002\u6301\u7eed\u76d1\u63a7\u548c\u8c03\u6574\uff1a\u5b9a\u671f\u68c0\u67e5\u51fd\u6570\u6027\u80fd\u5e76\u8fdb\u884c\u4f18\u5316\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729935810671cb9c27bb23.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5256\u6790 Java \u51fd\u6570\u6027\u80fd\u74f6\u9888\u7684\u6307\u5357<\/strong><\/p>\n<p>\u4f18\u5316 Java \u51fd\u6570\u7684\u6027\u80fd\u5bf9\u4e8e\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u54cd\u5e94\u65f6\u95f4\u548c\u6574\u4f53\u6548\u7387\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u5c06\u63d0\u4f9b\u4e00\u4e2a\u9010\u6b65\u6307\u5357\uff0c\u5e2e\u52a9\u4f60\u8bc6\u522b\u548c\u89e3\u51b3 Java \u51fd\u6570\u4e2d\u5e38\u89c1\u7684\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<p><strong>1. \u8bc6\u522b\u6027\u80fd\u74f6\u9888<\/strong><\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u6027\u80fd\u5206\u6790\u5de5\u5177\uff1a<\/strong> \u4f7f\u7528 Java Profiler \u6216 JMeter \u7b49\u5de5\u5177\u6765\u5256\u6790\u51fd\u6570\u7684\u6267\u884c\u5e76\u8bc6\u522b\u8017\u65f6\u7684\u90e8\u5206\u3002<\/li>\n<li><strong>\u76d1\u63a7\u6307\u6807\uff1a<\/strong> \u8ddf\u8e2a\u51fd\u6570\u7684\u6267\u884c\u65f6\u95f4\u3001\u5185\u5b58\u4f7f\u7528\u548c\u541e\u5410\u91cf\u7b49\u6307\u6807\uff0c\u4ee5\u8bc6\u522b\u8d8b\u52bf\u548c\u5f02\u5e38\u503c\u3002<\/li>\n<li><strong>\u5ba1\u67e5\u4ee3\u7801\uff1a<\/strong> \u4ed4\u7ec6\u5ba1\u67e5\u4f60\u7684\u4ee3\u7801\uff0c\u5bfb\u627e\u53ef\u80fd\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\u7684\u533a\u57df\uff0c\u4f8b\u5982\u4e0d\u5fc5\u8981\u7684\u5faa\u73af\u6216\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784\u3002<\/li>\n<\/ul>\n<p><strong>2. \u4f18\u5316\u4ee3\u7801<\/strong><\/p>\n<ul>\n<li><strong>\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5bf9\u8c61\u521b\u5efa\uff1a<\/strong> \u5c3d\u53ef\u80fd\u91cd\u7528\u5bf9\u8c61\uff0c\u800c\u4e0d\u662f\u521b\u5efa\u65b0\u5bf9\u8c61\u3002<\/li>\n<li><strong>\u4f7f\u7528\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784\uff1a<\/strong> \u6839\u636e\u51fd\u6570\u7684\u7279\u5b9a\u9700\u8981\u9009\u62e9\u9002\u5f53\u7684\u6570\u636e\u7ed3\u6784\uff08\u4f8b\u5982\uff0cMap\u3001Set \u6216 List\uff09\u3002<\/li>\n<li><strong>\u907f\u514d\u6df1\u5c42\u5d4c\u5957\uff1a<\/strong> \u5d4c\u5957\u8fc7\u591a\u4f1a\u4f7f\u4ee3\u7801\u96be\u4ee5\u8bfb\u53d6\u548c\u7ef4\u62a4\uff0c\u5e76\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\u3002<\/li>\n<li><strong>\u4f7f\u7528\u5e76\u884c\u5904\u7406\uff1a<\/strong> \u8003\u8651\u4f7f\u7528\u591a\u7ebf\u7a0b\u6216\u5e76\u884c\u6d41\u6765\u5145\u5206\u5229\u7528\u591a\u6838\u5904\u7406\u5668\u3002<\/li>\n<\/ul>\n<p><strong>3. \u5b9e\u6218\u6848\u4f8b\uff1a\u4f18\u5316 Java \u51fd\u6570\u7684\u5b57\u7b26\u4e32\u8fde\u63a5<\/strong><\/p>\n<p>\u5b57\u7b26\u4e32\u8fde\u63a5\u5728 Java \u4e2d\u7ecf\u5e38\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\uff0c\u7279\u522b\u662f\u5f53\u5b57\u7b26\u4e32\u957f\u5ea6\u8f83\u957f\u6216\u6d89\u53ca\u591a\u6b21\u8fde\u63a5\u65f6\u3002\u4ee5\u4e0b\u662f\u4f18\u5316\u6b64\u64cd\u4f5c\u7684\u51e0\u4e2a\u793a\u4f8b\uff1a<\/p>\n<pre>\/\/ \u7cdf\u7cd5\u7684\u4ee3\u7801\uff08\u4e0d\u63a8\u8350\uff09\nString result = \"\";\nfor (String s : strings) {\n  result += s;\n}<\/pre>\n<pre>\/\/ \u4f18\u5316\u540e\u7684\u4ee3\u7801\uff08\u63a8\u8350\uff09\nStringBuilder result = new StringBuilder();\nfor (String s : strings) {\n  result.append(s);\n}<\/pre>\n<p><strong>4. \u5176\u4ed6\u4f18\u5316\u6280\u672f<\/strong><\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u7f13\u5b58\uff1a<\/strong> \u5b58\u50a8\u5e38\u89c1\u6570\u636e\u6216\u67e5\u8be2\u7ed3\u679c\u4ee5\u63d0\u9ad8\u8bbf\u95ee\u901f\u5ea6\u3002<\/li>\n<li><strong>\u7f29\u5c0f\u51fd\u6570\uff1a<\/strong> \u79fb\u9664\u672a\u4f7f\u7528\u7684\u4ee3\u7801\u6216\u7b2c\u4e09\u65b9\u5e93\u4ee5\u51cf\u5c0f\u51fd\u6570\u7684\u5927\u5c0f\u3002<\/li>\n<li><strong>\u4f18\u5316 I\/O \u64cd\u4f5c\uff1a<\/strong> \u6709\u6548\u5730\u4f7f\u7528 I\/O Stream \u548c\u7f13\u51b2\u533a\u6765\u51cf\u5c11 I\/O \u64cd\u4f5c\u7684\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<p><strong>5. \u6301\u7eed\u76d1\u63a7\u548c\u8c03\u6574<\/strong><\/p>\n<p>\u6027\u80fd\u4f18\u5316\u662f\u4e00\u4e2a\u6301\u7eed\u7684\u8fc7\u7a0b\u3002\u5b9a\u671f\u76d1\u63a7\u4f60\u7684\u51fd\u6570\u5e76\u6839\u636e\u9700\u8981\u8fdb\u884c\u8c03\u6574\u4ee5\u786e\u4fdd\u5b83\u4eec\u4fdd\u6301\u6700\u4f73\u6027\u80fd\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5256\u6790 Java \u51fd\u6570\u6027\u80fd\u74f6\u9888\u7684\u6307\u5357\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5256\u6790 Java \u51fd\u6570\u6027\u80fd\u74f6\u9888\u7684\u6307&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-202711","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202711","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=202711"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202711\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202711"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202711"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}