{"id":203010,"date":"2025-05-22T09:10:14","date_gmt":"2025-05-22T01:10:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203010\/"},"modified":"2025-05-22T09:10:14","modified_gmt":"2025-05-22T01:10:14","slug":"%e5%87%bd%e6%95%b0%e5%bc%8f%e6%8e%a5%e5%8f%a3%e5%9c%a8%e6%94%b9%e5%96%84java%e4%bb%a3%e7%a0%81%e5%8f%af%e8%af%bb%e6%80%a7%e6%96%b9%e9%9d%a2%e7%9a%84%e5%ba%94%e7%94%a8%e5%9c%ba%e6%99%af%e6%9c%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203010\/","title":{"rendered":"\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u6539\u5584Java\u4ee3\u7801\u53ef\u8bfb\u6027\u65b9\u9762\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u6539\u5584Java\u4ee3\u7801\u53ef\u8bfb\u6027\u65b9\u9762\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f<\/h1>\n

\u5404\u4f4d\u5c0f\u4f19\u4f34\u4eec\uff0c\u5927\u5bb6\u597d\u5440\uff01\u770b\u770b\u4eca\u5929\u6211\u53c8\u7ed9\u5404\u4f4d\u5e26\u6765\u4e86\u4ec0\u4e48\u6587\u7ae0\uff1f\u672c\u6587\u6807\u9898\u662f<\/span>\u300a\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u6539\u5584Java\u4ee3\u7801\u53ef\u8bfb\u6027\u65b9\u9762\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f\u300b<\/span>\uff0c\u5f88\u660e\u663e\u662f\u5173\u4e8e\u6587\u7ae0<\/span>\u7684\u6587\u7ae0\u54c8\u54c8\u54c8\uff0c\u5176\u4e2d\u5185\u5bb9\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u80fd\u5e2e\u5230\u4f60\uff0c\u89c9\u5f97\u5f88\u4e0d\u9519\u7684\u8bdd\uff0c\u6b22\u8fce\u5404\u4f4d\u591a\u591a\u70b9\u8bc4\u548c\u5206\u4eab\uff01<\/span><\/p>\n

\u51fd\u6570\u5f0f\u63a5\u53e3\u901a\u8fc7\u5c06\u884c\u4e3a\u53c2\u6570\u5316\u4e3a\u51fd\u6570\uff0c\u7b80\u5316\u6d41\u5f0f\u5904\u7406\uff0c\u63d0\u9ad8\u6d4b\u8bd5\u53ef\u8bfb\u6027\uff0c\u521b\u5efa\u5b9a\u5236\u884c\u4e3a\u548c\u589e\u5f3a\u4ee3\u7801\u7ec4\u7ec7\u6027\uff0c\u6709\u6548\u63d0\u5347 Java \u4ee3\u7801\u53ef\u8bfb\u6027\u3002\u5b9e\u8df5\u4e2d\uff0c\u5b83\u53ef\u7528\u4e8e\u9a8c\u8bc1\u5b57\u7b26\u4e32\u6709\u6548\u6027\uff0c\u4f7f\u4ee3\u7801\u66f4\u6613\u4e8e\u9605\u8bfb\u548c\u7ef4\u62a4\u3002<\/p>\n

<\/p>\n

\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u63d0\u5347 Java \u4ee3\u7801\u53ef\u8bfb\u6027\u7684\u5e94\u7528\u573a\u666f<\/strong><\/p>\n

\u7b80\u4ecb<\/strong><\/p>\n

\u51fd\u6570\u5f0f\u63a5\u53e3\u662f Java \u4e2d\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u5b83\u6709\u52a9\u4e8e\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4e00\u79cd\u53ea\u58f0\u660e\u4e86\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\u3002\u8fd9\u4f7f\u5f97\u4f60\u53ef\u4ee5\u521b\u5efa\u53ef\u4f5c\u4e3a lambda \u8868\u8fbe\u5f0f\u6216\u65b9\u6cd5\u5f15\u7528\u7684\u53ef\u91cd\u7528\u4ee3\u7801\u5757\u3002<\/p>\n

\u5e94\u7528\u573a\u666f<\/strong><\/p>\n

\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u4ee5\u4e0b\u573a\u666f\u4e2d\u6709\u52a9\u4e8e\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\uff1a<\/p>\n

    \n
  1. \u5c06\u884c\u4e3a\u53c2\u6570\u5316\u4e3a\u51fd\u6570\uff1a<\/strong>\u51fd\u6570\u5f0f\u63a5\u53e3\u5141\u8bb8\u4f60\u5c06\u884c\u4e3a\u53c2\u6570\u5316\u4e3a\u51fd\u6570\uff0c\u4ece\u800c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u91cd\u7528\u6027\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3 Predicate<Integer><\/code> \u5728\u5217\u8868\u4e2d\u67e5\u627e\u5076\u6570\uff1a<\/li>\n<\/ol>\n
    List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6);\nPredicate<Integer> isEven = number -> number % 2 == 0;\nList<Integer> evenNumbers = numbers.stream().filter(isEven).collect(Collectors.toList());<\/pre>\n
      \n
    1. \u7b80\u5316\u6d41\u5f0f\u5904\u7406\uff1a<\/strong>\u6d41\u5f0f API \u5927\u91cf\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\u5b83\u4eec\u4f7f\u4f60\u80fd\u591f\u4f7f\u7528\u7b80\u6d01\u4e14\u53ef\u8bfb\u7684\u65b9\u5f0f\u5bf9\u6d41\u8fdb\u884c\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3 Function<Integer, String><\/code> \u5c06\u5217\u8868\u4e2d\u7684\u6570\u5b57\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\uff1a<\/li>\n<\/ol>\n
      List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6);\nFunction<Integer, String> toString = number -> Integer.toString(number);\nList<String> stringNumbers = numbers.stream().map(toString).collect(Collectors.toList());<\/pre>\n
        \n
      1. \u63d0\u9ad8\u6d4b\u8bd5\u53ef\u8bfb\u6027\uff1a<\/strong>\u51fd\u6570\u5f0f\u63a5\u53e3\u53ef\u4ee5\u4f7f\u6d4b\u8bd5\u4ee3\u7801\u66f4\u5177\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u901a\u8fc7\u5c06\u6d4b\u8bd5\u903b\u8f91\u62bd\u8c61\u5230\u51fd\u6570\u5f0f\u63a5\u53e3\u4e2d\uff0c\u4f60\u53ef\u4ee5\u8f7b\u677e\u5730\u91cd\u7528\u548c\u7ec4\u5408\u6d4b\u8bd5\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3\u6765\u6d4b\u8bd5\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\uff1a<\/li>\n<\/ol>\n
        Supplier<Boolean> isNullOrEmpty = () -> name == null || name.isEmpty();<\/pre>\n
          \n
        1. \u521b\u5efa\u5b9a\u5236\u7684\u884c\u4e3a\uff1a<\/strong>\u51fd\u6570\u5f0f\u63a5\u53e3\u5141\u8bb8\u4f60\u521b\u5efa\u81ea\u5df1\u7684\u5b9a\u5236\u884c\u4e3a\uff0c\u800c\u65e0\u9700\u6269\u5c55\u7c7b\u6216\u5b9e\u73b0\u63a5\u53e3\u3002\u8fd9\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u7075\u6d3b\u6027\u5e76\u51cf\u5c11\u6837\u677f\u4ee3\u7801\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3 Comparator<Integer><\/code> \u5bf9\u5217\u8868\u4e2d\u7684\u6570\u5b57\u8fdb\u884c\u6392\u5e8f\uff1a<\/li>\n<\/ol>\n
          List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5, 6);\nComparator<Integer> descendingComparator = Comparator.reverseOrder();\nList<Integer> sortedNumbers = numbers.stream().sorted(descendingComparator).collect(Collectors.toList());<\/pre>\n
            \n
          1. \u589e\u5f3a\u4ee3\u7801\u7ec4\u7ec7\u6027\uff1a<\/strong>\u51fd\u6570\u5f0f\u63a5\u53e3\u53ef\u4ee5\u5e2e\u52a9\u7ec4\u7ec7\u4ee3\u7801\uff0c\u4f7f\u4e4b\u66f4\u6613\u4e8e\u9605\u8bfb\u548c\u7ef4\u62a4\u3002\u901a\u8fc7\u5c06\u76f8\u5173\u884c\u4e3a\u5206\u7ec4\u5230\u5355\u72ec\u7684\u63a5\u53e3\u4e2d\uff0c\u4f60\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u3002<\/li>\n<\/ol>\n
            \u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
            \u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u7684\u5b9e\u6218\u6848\u4f8b\uff1a<\/p>\n
            \/\/ \u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u7528\u4e8e\u9a8c\u8bc1\u5b57\u7b26\u4e32\u662f\u5426\u6709\u6548\ninterface StringValidator {\n    boolean isValid(String str);\n}\n\n\/\/ \u521b\u5efa\u4e00\u4e2a\u9a8c\u8bc1\u5668\u6765\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u975e\u7a7a\u548c\u975e\u7a7a\nStringValidator notNullOrEmpty = str -> str != null && !str.isEmpty();\n\n\/\/ \u521b\u5efa\u4e00\u4e2a\u65b9\u6cd5\u6765\u9a8c\u8bc1\u5b57\u7b26\u4e32\uff0c\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3\u4f5c\u4e3a\u53c2\u6570\nboolean validateString(String str, StringValidator validator) {\n    return validator.isValid(str);\n}\n\n\/\/ \u4f7f\u7528\u9a8c\u8bc1\u5668\u6765\u9a8c\u8bc1\u5b57\u7b26\u4e32\nString input = \"Hello, world!\";\nboolean isValid = validateString(input, notNullOrEmpty);<\/pre>\n
             conclusion<\/strong><\/p>\n
            \u603b\u7684\u6765\u8bf4\uff0c\u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u63d0\u9ad8 Java \u4ee3\u7801\u53ef\u8bfb\u6027\u7684\u5f3a\u5927\u5de5\u5177\u3002\u901a\u8fc7\u5c06\u884c\u4e3a\u53c2\u6570\u5316\u4e3a\u51fd\u6570\u5e76\u7b80\u5316\u6d41\u5f0f\u5904\u7406\uff0c\u4f60\u53ef\u4ee5\u7f16\u5199\u66f4\u7b80\u6d01\u3001\u66f4\u6613\u4e8e\u7406\u89e3\u548c\u7ef4\u62a4\u7684\u4ee3\u7801\u3002<\/p>\n
            \u672c\u7bc7\u5173\u4e8e\u300a\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u6539\u5584Java\u4ee3\u7801\u53ef\u8bfb\u6027\u65b9\u9762\u7684\u5e94\u7528\u573a\u666f\u6709\u54ea\u4e9b\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
            \u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u6539\u5584Java\u4ee3\u7801\u53ef\u8bfb...<\/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-203010","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203010","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=203010"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203010\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203010"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203010"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203010"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}