{"id":202857,"date":"2025-05-22T12:13:11","date_gmt":"2025-05-22T04:13:11","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202857\/"},"modified":"2025-05-22T12:13:11","modified_gmt":"2025-05-22T04:13:11","slug":"%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e5%af%b9-java-%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%e7%9a%84%e5%bd%b1%e5%93%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202857\/","title":{"rendered":"\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9 Java \u8bbe\u8ba1\u6a21\u5f0f\u7684\u5f71\u54cd"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9 Java \u8bbe\u8ba1\u6a21\u5f0f\u7684\u5f71\u54cd<\/h1>\n<p>\u54c8\u55bd\uff01\u5927\u5bb6\u597d\uff0c\u5f88\u9ad8\u5174\u53c8\u89c1\u9762\u4e86\uff0c\u6211\u662f\u7684\u4e00\u540d\u4f5c\u8005\uff0c\u4eca\u5929\u7531\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9 Java \u8bbe\u8ba1\u6a21\u5f0f\u7684\u5f71\u54cd\u300b<\/span>\uff0c\u672c\u6587\u4e3b\u8981\u4f1a\u8bb2\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5927\u5bb6\u4e00\u8d77\u5b66\u4e60\u8fdb\u6b65\uff0c\u4e5f\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u3001\u70b9\u8d5e\u3001\u6536\u85cf\u3001\u8f6c\u53d1! \u4e0b\u9762\u5c31\u4e00\u8d77\u6765\u770b\u770b\u5427\uff01<\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9 Java \u8bbe\u8ba1\u6a21\u5f0f\u7684\u5f71\u54cd\u663e\u8457\uff1a\u4e0d\u53ef\u53d8\u6027\u964d\u4f4e\u5e76\u53d1\u95ee\u9898\uff0c\u7b80\u5316\u8c03\u8bd5\u3002\u7eaf\u51c0\u51fd\u6570\u7b80\u5316\u6d4b\u8bd5\u548c\u5e76\u884c\u5316\uff0c\u63d0\u9ad8\u53ef\u91cd\u7528\u6027\u3002\u58f0\u660e\u5f0f\u7f16\u7a0b\u589e\u5f3a\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729951969671cf8e10055a.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9 Java \u8bbe\u8ba1\u6a21\u5f0f\u7684\u5f71\u54cd<\/strong><\/p>\n<p>\u968f\u7740\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u7684\u5174\u8d77\uff0cJava \u8bbe\u8ba1\u6a21\u5f0f\u6b63\u7ecf\u5386\u7740\u91cd\u5927\u7684\u8f6c\u53d8\u3002\u51fd\u6570\u5f0f\u7f16\u7a0b\u5f3a\u8c03\u4e0d\u53ef\u53d8\u6027\u3001\u7eaf\u51c0\u51fd\u6570\u548c\u58f0\u660e\u5f0f\u4ee3\u7801\uff0c\u8fd9\u4e9b\u7279\u6027\u5bf9\u4f20\u7edf\u9762\u5411\u5bf9\u8c61\u6a21\u5f0f\u4ea7\u751f\u7740\u6df1\u8fdc\u7684\u5f71\u54cd\u3002<\/p>\n<p><strong>\u4e0d\u53ef\u53d8\u6027\uff1a<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\uff0c\u5bf9\u8c61\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u8fd9\u610f\u5473\u7740\u4e00\u65e6\u521b\u5efa\u540e\uff0c\u5b83\u4eec\u7684\u72b6\u6001\u5c31\u4e0d\u80fd\u6539\u53d8\u3002\u8fd9\u79cd\u4e0d\u53ef\u53d8\u6027\u964d\u4f4e\u4e86\u591a\u7ebf\u7a0b\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684\u5e76\u53d1\u95ee\u9898\uff0c\u5e76\u7b80\u5316\u4e86\u8c03\u8bd5\u3002<\/p>\n<p><strong>\u4f8b\u5982\uff1a<\/strong><\/p>\n<p>\u5728\u4f20\u7edf Java \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>StringBuilder<\/code> \u7c7b\u6765\u6784\u5efa\u53ef\u53d8\u5b57\u7b26\u4e32\u3002\u7136\u800c\uff0c\u5728\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0d\u53ef\u53d8\u7684 <code>String<\/code> \u7c7b\u548c <code>Collectors.joining()<\/code> \u65b9\u6cd5\u6765\u8fde\u63a5\u5b57\u7b26\u4e32\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>String message = collectors.joining(\"; \");<\/pre>\n<p><strong>\u7eaf\u51c0\u51fd\u6570\uff1a<\/strong><\/p>\n<p>\u7eaf\u51c0\u51fd\u6570\u662f\u4e0d\u4ea7\u751f\u526f\u4f5c\u7528\u7684\uff0c\u5e76\u4e14\u53ea\u4f9d\u8d56\u4e8e\u5176\u8f93\u5165\u3002\u7eaf\u51c0\u51fd\u6570\u7b80\u5316\u4e86\u6d4b\u8bd5\u548c\u5e76\u884c\u5316\uff0c\u56e0\u4e3a\u5b83\u4eec\u53ef\u4ee5\u5728\u4efb\u4f55\u65f6\u95f4\u548c\u987a\u5e8f\u6267\u884c\uff0c\u800c\u4e0d\u4f1a\u5f71\u54cd\u5e94\u7528\u7a0b\u5e8f\u7684\u72b6\u6001\u3002<\/p>\n<p><strong>\u4f8b\u5982\uff1a<\/strong><\/p>\n<p>\u4f20\u7edf Java \u4e2d\u7684 <code>substring()<\/code> \u65b9\u6cd5\u4f1a\u4fee\u6539\u539f\u59cb\u5b57\u7b26\u4e32\u3002\u5728\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 <code>substring()<\/code> \u7684\u4e0d\u53d8\u7248\u672c\uff0c\u5b83\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u800c\u4e0d\u662f\u4fee\u6539\u539f\u59cb\u5b57\u7b26\u4e32\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>String substring = originalString.substring(0, 10);<\/pre>\n<p><strong>\u58f0\u660e\u5f0f\u7f16\u7a0b\uff1a<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u4f7f\u7528\u66f4\u58f0\u660e\u5f0f\u7684\u7f16\u7a0b\u98ce\u683c\uff0c\u91cd\u70b9\u5173\u6ce8\u6240\u8981\u5b8c\u6210\u7684\u4efb\u52a1\uff0c\u800c\u4e0d\u662f\u5982\u4f55\u5b8c\u6210\u3002\u8fd9\u4f7f\u5f97\u4ee3\u7801\u66f4\u5bb9\u6613\u7406\u89e3\u548c\u7ef4\u62a4\u3002<\/p>\n<p><strong>\u4f8b\u5982\uff1a<\/strong><\/p>\n<p>\u5728\u4f20\u7edf Java \u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5faa\u73af\u548c\u6761\u4ef6\u8bed\u53e5\u6765\u8fc7\u6ee4\u548c\u6536\u96c6\u6570\u636e\u3002\u5728\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u7c7b\u4f3c\u4e8e SQL \u7684\u5f3a\u5927\u6d41 API \u6765\u6267\u884c\u8fd9\u4e9b\u64cd\u4f5c\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>List&lt;String&gt; filteredList = list.stream()\n                             .filter(s -&gt; s.startsWith(\"J\"))\n                             .collect(Collectors.toList());<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n<p>\u5728\u4ee5\u4e0b\u5b9e\u6218\u6848\u4f8b\u4e2d\uff0c\u89c2\u5bdf\u51fd\u6570\u5f0f\u7f16\u7a0b\u5982\u4f55\u5f71\u54cd Java \u8bbe\u8ba1\u6a21\u5f0f\uff1a<\/p>\n<ul>\n<li><strong>\u547d\u4ee4\u6a21\u5f0f\uff1a<\/strong> \u51fd\u6570\u5316\u547d\u4ee4\u6a21\u5f0f\u4f7f\u7528\u4e0d\u53ef\u53d8\u7684\u547d\u4ee4\u5bf9\u8c61\uff0c\u7b80\u5316\u4e86\u591a\u7ebf\u7a0b\u5904\u7406\u548c\u6d4b\u8bd5\u3002<\/li>\n<li><strong>\u7b56\u7565\u6a21\u5f0f\uff1a<\/strong> \u51fd\u6570\u5316\u7b56\u7565\u6a21\u5f0f\u4f7f\u7528\u7eaf\u51c0\u7b56\u7565\u51fd\u6570\uff0c\u5b9e\u73b0\u4e86\u66f4\u58f0\u660e\u5f0f\u548c\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002<\/li>\n<li><strong>\u5efa\u9020\u8005\u6a21\u5f0f\uff1a<\/strong> \u51fd\u6570\u5316\u5efa\u9020\u8005\u6a21\u5f0f\u5229\u7528\u4e0d\u53ef\u53d8\u7684\u5efa\u9020\u5668\u7c7b\uff0c\u964d\u4f4e\u4e86\u590d\u6742\u5bf9\u8c61\u6784\u9020\u4e2d\u7684\u9519\u8bef\u53ef\u80fd\u6027\u3002<\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba\uff1a<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9 Java \u8bbe\u8ba1\u6a21\u5f0f\u7684\u5f71\u54cd\u662f\u5de8\u5927\u7684\u3002\u4e0d\u53ef\u53d8\u6027\u3001\u7eaf\u51c0\u51fd\u6570\u548c\u58f0\u660e\u5f0f\u7f16\u7a0b\u7279\u6027\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u548c\u5e76\u53d1\u6027\u3002\u968f\u7740\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5174\u8d77\uff0cJava \u5f00\u53d1\u4eba\u5458\u5fc5\u987b\u9002\u5e94\u8fd9\u4e9b\u65b0\u8303\u5f0f\uff0c\u4ee5\u521b\u5efa\u66f4\u5065\u58ee\u3001\u66f4\u53ef\u6269\u5c55\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9 Java \u8bbe\u8ba1\u6a21\u5f0f\u7684\u5f71\u54cd\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5bf9 Java \u8bbe\u8ba1\u6a21\u5f0f&#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-202857","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202857","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=202857"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202857\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}