{"id":202586,"date":"2025-05-22T09:27:28","date_gmt":"2025-05-22T01:27:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202586\/"},"modified":"2025-05-22T09:27:28","modified_gmt":"2025-05-22T01:27:28","slug":"java-%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e5%ba%93%e5%92%8c%e5%b7%a5%e5%85%b7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202586\/","title":{"rendered":"Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u5e93\u548c\u5de5\u5177"},"content":{"rendered":"

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

Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u5e93\u548c\u5de5\u5177<\/h1>\n

\u4f60\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u5417\uff1f\u672c\u6587\u300aJava \u51fd\u6570\u5f0f\u7f16\u7a0b\u5e93\u548c\u5de5\u5177\u300b<\/span>\uff0c\u4e3b\u8981\u4ecb\u7ecd\u7684\u5185\u5bb9\u5c31\u6d89\u53ca\u5230<\/span>\uff0c\u5982\u679c\u4f60\u60f3\u63d0\u5347\u81ea\u5df1\u7684\u5f00\u53d1\u80fd\u529b\uff0c\u5c31\u4e0d\u8981\u9519\u8fc7\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5927\u5bb6\u8981\u77e5\u9053\u7f16\u7a0b\u7406\u8bba\u57fa\u7840\u548c\u5b9e\u6218\u64cd\u4f5c\u90fd\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u54e6\uff01<\/p>\n

Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u5e93\u548c\u5de5\u5177\uff0c\u5982 java.util.function \u548c java.util.stream\uff0c\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u529f\u80fd\uff0c\u5305\u62ec\u51fd\u6570\u5f0f\u63a5\u53e3\u3001\u6d41 API \u548c\u96c6\u5408\u5b9e\u7528\u7a0b\u5e8f\uff0c\u652f\u6301\u5f00\u53d1\u7b80\u6d01\u3001\u53ef\u91cd\u7528\u7684\u4ee3\u7801\u3002\u6b64\u5916\uff0c\u8fd8\u6709\u67ef\u91cc\u5316\u3001\u7ec4\u5408\u548c\u6a21\u5f0f\u5339\u914d\u7b49\u51fd\u6570\u5f0f\u5de5\u5177\uff0c\u53ef\u8fdb\u4e00\u6b65\u589e\u5f3a\u4ee3\u7801\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u51fd\u6570\u5f0f\u7f16\u7a0b\u5b9e\u8df5\u53ef\u4ee5\u663e\u8457\u7b80\u5316\u590d\u6742\u95ee\u9898\uff0c\u4f8b\u5982\u8ba1\u7b97\u4e00\u4e2a\u6570\u5b57\u5217\u8868\u4e2d\u5947\u6570\u7684\u603b\u548c\uff0c\u901a\u8fc7\u4f7f\u7528\u6d41\u8fc7\u6ee4\u548c\u805a\u5408\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5b9e\u73b0\u9ad8\u6548\u7b80\u6d01\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u5e93\u548c\u5de5\u5177<\/h3>\n

\u51fd\u6570\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u5f0f\uff0c\u5b83\u5173\u6ce8\u4e8e\u4e0d\u53ef\u53d8\u503c\u3001\u51fd\u6570\u4f5c\u4e3a\u4e00\u7b49\u516c\u6c11\u4ee5\u53ca\u8868\u8fbe\u5f0f\u3002\u5b83\u4f7f\u5f00\u53d1\u4eba\u5458\u80fd\u591f\u7f16\u5199\u7b80\u6d01\u3001\u53ef\u91cd\u7528\u4e14\u6613\u4e8e\u7ef4\u62a4\u7684\u4ee3\u7801\u3002Java \u8bed\u8a00\u4e2d\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e93\u548c\u5de5\u5177\uff0c\u53ef\u5e2e\u52a9\u5f00\u53d1\u8005\u5b9e\u73b0\u51fd\u6570\u5f0f\u7f16\u7a0b\u98ce\u683c\u3002<\/p>\n

\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e93<\/strong><\/p>\n

    \n
  • java.util.function<\/strong>\uff1a\u63d0\u4f9b\u5404\u79cd\u51fd\u6570\u5f0f\u63a5\u53e3\uff0c\u7528\u4e8e\u8868\u793a\u901a\u7528\u64cd\u4f5c\uff0c\u5982 Predicate<\/code>\u3001Function<\/code> \u548c Consumer<\/code>\u3002<\/li>\n
  • java.util.stream<\/strong>\uff1a\u63d0\u4f9b\u6d41 API\uff0c\u7528\u4e8e\u6267\u884c\u6d41\u6c34\u7ebf\u64cd\u4f5c\u548c\u5bf9\u96c6\u5408\u5e94\u7528\u51fd\u6570\u3002<\/li>\n
  • com.google.common.collect<\/strong>\uff1aGoogle Guava \u5e93\u63d0\u4f9b\u5404\u79cd\u96c6\u5408\u548c\u5b9e\u7528\u7a0b\u5e8f\u7c7b\uff0c\u652f\u6301\u51fd\u6570\u5f0f\u7f16\u7a0b\uff0c\u5982 ImmutableMap<\/code> \u548c Iterables<\/code>\u3002<\/li>\n<\/ul>\n

    \u51fd\u6570\u5f0f\u5de5\u5177<\/strong><\/p>\n

      \n
    • \u67ef\u91cc\u5316\uff08Currying\uff09<\/strong>\uff1a\u5c06\u4e00\u4e2a\u591a\u53c2\u6570\u51fd\u6570\u8f6c\u6362\u4e3a\u4e00\u4e2a\u7cfb\u5217\u5355\u53c2\u6570\u51fd\u6570\u7684\u6280\u672f\u3002\u53ef\u4ee5\u901a\u8fc7 java.util.function.Function.bind()<\/code> \u65b9\u6cd5\u5b9e\u73b0\u3002<\/li>\n
    • \u7ec4\u5408\uff08Composition\uff09<\/strong>\uff1a\u5c06\u4e24\u4e2a\u6216\u66f4\u591a\u51fd\u6570\u7ec4\u5408\u6210\u4e00\u4e2a\u65b0\u51fd\u6570\u3002\u53ef\u4ee5\u901a\u8fc7 java.util.function.Function.compose()<\/code> \u548c andThen()<\/code> \u65b9\u6cd5\u5b9e\u73b0\u3002<\/li>\n
    • \u6a21\u5f0f\u5339\u914d\uff08Pattern Matching\uff09<\/strong>\uff1a\u6839\u636e\u503c\u7c7b\u578b\u6216\u7ed3\u6784\u5bf9\u503c\u8fdb\u884c\u5206\u652f\u3002Java \u5c1a\u672a\u63d0\u4f9b\u5185\u7f6e\u7684\u6a21\u5f0f\u5339\u914d\u529f\u80fd\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7\u7b2c\u4e09\u65b9\u5e93\uff08\u5982 [match](https:\/\/github.com\/typetools\/match)\uff09\u5b9e\u73b0\u3002<\/li>\n<\/ul>\n

      \u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n

      \u8003\u8651\u8ba1\u7b97\u4e00\u4e2a\u6570\u5b57\u5217\u8868\u4e2d\u5947\u6570\u7684\u603b\u548c\u3002\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e93\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u7b80\u6d01\u9ad8\u6548\u7684\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n

      import java.util.List;\nimport java.util.stream.Collectors;\n\npublic class SumOddNumbers {\n\n    public static int sumOddNumbers(List<Integer> numbers) {\n        return numbers.stream()\n                .filter(n -> n % 2 != 0)\n                .reduce(0, (a, b) -> a + b);\n    }\n\n    public static void main(String[] args) {\n        List<Integer> numbers = List.of(1, 2, 3, 4, 5);\n        int sum = sumOddNumbers(numbers);\n        System.out.println(sum); \/\/ \u8f93\u51fa\uff1a9\n    }\n}<\/pre>\n
      \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cstream()<\/code> \u65b9\u6cd5\u7528\u6765\u521b\u5efa\u6570\u636e\u6d41\uff0cfilter()<\/code> \u65b9\u6cd5\u7528\u8c13\u8bcd\u8fc7\u6ee4\u51fa\u5947\u6570\uff0creduce()<\/code> \u65b9\u6cd5\u7528\u4e8e\u5c06\u5947\u6570\u6c42\u548c\u3002<\/p>\n
      \u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6587\u7ae0\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"
      Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u5e93\u548c\u5de5\u5177 \u4f60...<\/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-202586","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202586","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=202586"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202586\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}