{"id":202782,"date":"2025-05-22T08:22:39","date_gmt":"2025-05-22T00:22:39","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202782\/"},"modified":"2025-05-22T08:22:39","modified_gmt":"2025-05-22T00:22:39","slug":"%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e8%8c%83%e5%bc%8f%e5%9c%a8-java-%e4%bc%81%e4%b8%9a%e7%ba%a7%e5%ba%94%e7%94%a8%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202782\/","title":{"rendered":"\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5728 Java \u4f01\u4e1a\u7ea7\u5e94\u7528\u4e2d\u7684\u5e94\u7528"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5728 Java \u4f01\u4e1a\u7ea7\u5e94\u7528\u4e2d\u7684\u5e94\u7528<\/h1>\n<p>\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5728 Java \u4f01\u4e1a\u7ea7\u5e94\u7528\u4e2d\u7684\u5e94\u7528\u300b<\/span>\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n<p>\u95ee\u9898\uff1a \u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5728 Java \u4f01\u4e1a\u7ea7\u5e94\u7528\u4e2d\u7684\u5e94\u7528\u4f18\u52bf\uff1f\u57fa\u672c\u6982\u5ff5\uff1a\u7eaf\u51fd\u6570\uff1a\u4e0d\u4ea7\u751f\u526f\u4f5c\u7528\u4e0d\u53ef\u53d8\u6027\uff1a\u6570\u636e\u7ed3\u6784\u4e00\u7ecf\u521b\u5efa\u4e0d\u53ef\u4fee\u6539\u9ad8\u9636\u51fd\u6570\uff1a\u53ef\u4ee5\u5c06\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u6216\u8fd4\u56de\u51fd\u6570\u5b9e\u6218\u6848\u4f8b\uff1a\u4ece\u5305\u542b\u7528\u6237\u6570\u636e\u7684\u5217\u8868\u4e2d\u83b7\u53d6\u552f\u4e00\u5e76\u8f6c\u6362\u4e3a\u5927\u5199\u7684\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u9762\u5411\u5bf9\u8c61\u89e3\u51b3\u65b9\u6848\uff1a FOR \u5faa\u73af\u548c\u6761\u4ef6\u8bed\u53e5\u51fd\u6570\u5f0f\u89e3\u51b3\u65b9\u6848\uff1a Stream API\uff08\u6620\u5c04\u3001\u53bb\u91cd\u3001\u8f6c\u6362\u3001\u6536\u96c6\uff09\u51fd\u6570\u5f0f\u89e3\u51b3\u65b9\u6848\u7684\u4f18\u52bf\uff1a\u66f4\u7b80\u6d01\u53ef\u7ef4\u62a4\u6027\u66f4\u9ad8\u5e76\u53d1\u53cb\u597d<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729941265671ccf11422f5.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5728 Java \u4f01\u4e1a\u7ea7\u5e94\u7528\u4e2d\u7684\u5e94\u7528<\/strong><\/p>\n<p><strong>\u5f15\u8a00<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5f3a\u8c03\u4e0d\u6539\u53d8\u72b6\u6001\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u7f16\u5199\u53ef\u7ef4\u62a4\u3001\u53ef\u6d4b\u8bd5\u548c\u53ef\u7ec4\u5408\u7684\u4ee3\u7801\u7684\u5f3a\u5927\u65b9\u6cd5\u3002\u8fd1\u5e74\u6765\uff0c\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u4f01\u4e1a\u7ea7\u5e94\u7528\u5f00\u53d1\u4e2d\u8d8a\u6765\u8d8a\u6d41\u884c\u3002<\/p>\n<p><strong>\u57fa\u672c\u6982\u5ff5<\/strong><\/p>\n<ul>\n<li><strong>\u7eaf\u51fd\u6570\uff1a<\/strong>\u4e0d\u4ea7\u751f\u526f\u4f5c\u7528\u6216\u6539\u53d8\u72b6\u6001\u7684\u51fd\u6570<\/li>\n<li><strong>\u4e0d\u53ef\u53d8\u6027\uff1a<\/strong>\u4e00\u7ecf\u521b\u5efa\u5c31\u4e0d\u80fd\u4fee\u6539\u7684\u6570\u636e\u7ed3\u6784<\/li>\n<li><strong>\u9ad8\u9636\u51fd\u6570\uff1a<\/strong>\u53ef\u4ee5\u5c06\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u6216\u8fd4\u56de\u51fd\u6570\u7684\u51fd\u6570<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8ba9\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u7b80\u5355\u7684 Java \u4f01\u4e1a\u7ea7\u7528\u4f8b\u6765\u5c55\u793a\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u4f18\u52bf\uff1a<\/p>\n<p><strong>\u95ee\u9898\uff1a<\/strong>\u4ece\u4e00\u4e2a\u5305\u542b\u7528\u6237\u6570\u636e\u7684\u5217\u8868\u4e2d\u83b7\u53d6\u6240\u6709\u552f\u4e00\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u5e76\u5c06\u5176\u8f6c\u6362\u4e3a\u5927\u5199\u3002<\/p>\n<p><strong>\u9762\u5411\u5bf9\u8c61\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n<pre>import java.util.ArrayList;\nimport java.util.List;\n\npublic class EmailExtraction {\n\n    public static void main(String[] args) {\n        List&lt;User&gt; users = new ArrayList&lt;&gt;();\n        \/\/Populate the 'users' list with user data\n\n        List&lt;String&gt; emails = new ArrayList&lt;&gt;();\n        for (User user : users) {\n            if (!emails.contains(user.getEmail())) {\n                emails.add(user.getEmail().toUpperCase());\n            }\n        }\n    }\n\n    static class User {\n        private String email;\n\n        \/\/Getters and setters\n    }\n}<\/pre>\n<p><strong>\u51fd\u6570\u5f0f\u89e3\u51b3\u65b9\u6848\uff1a<\/strong><\/p>\n<pre>import java.util.List;\nimport java.util.stream.Collectors;\n\npublic class EmailExtraction {\n\n    public static void main(String[] args) {\n        List&lt;User&gt; users = new ArrayList&lt;&gt;();\n        \/\/Populate the 'users' list with user data\n\n        List&lt;String&gt; emails = users.stream()\n                .map(User::getEmail)\n                .distinct()\n                .map(String::toUpperCase)\n                .collect(Collectors.toList());\n    }\n\n    static class User {\n        private String email;\n\n        \/\/Getters and setters\n    }\n}<\/pre>\n<p><strong>\u51fd\u6570\u5f0f\u89e3\u51b3\u65b9\u6848\u7684\u4f18\u52bf\uff1a<\/strong><\/p>\n<ul>\n<li><strong>\u66f4\u7b80\u6d01\uff1a<\/strong>\u51fd\u6570\u5f0f\u89e3\u51b3\u65b9\u6848\u66f4\u7b80\u6d01\uff0c\u6613\u4e8e\u9605\u8bfb\u548c\u7406\u89e3\u3002<\/li>\n<li><strong>\u53ef\u7ef4\u62a4\u6027\u66f4\u9ad8\uff1a<\/strong>\u5b83\u907f\u514d\u4e86\u72b6\u6001\u4fee\u6539\uff0c\u7b80\u5316\u4e86\u9519\u8bef\u5904\u7406\u3002<\/li>\n<li><strong>\u5e76\u53d1\u53cb\u597d\uff1a<\/strong>\u51fd\u6570\u662f\u65e0\u72b6\u6001\u7684\uff0c\u53ef\u4ee5\u5728\u5e76\u53d1\u73af\u5883\u4e2d\u5b89\u5168\u4f7f\u7528\u3002<\/li>\n<\/ul>\n<p>\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5728 Java \u4f01\u4e1a\u7ea7\u5e94\u7528\u4e2d\u7684\u5e94\u7528\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u8303\u5f0f\u5728 Java \u4f01\u4e1a&#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-202782","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202782","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=202782"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202782\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202782"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202782"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202782"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}