{"id":202847,"date":"2025-05-22T09:11:09","date_gmt":"2025-05-22T01:11:09","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202847\/"},"modified":"2025-05-22T09:11:09","modified_gmt":"2025-05-22T01:11:09","slug":"%e5%9c%a8-java-%e4%b8%ad%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%ef%bc%9a%e6%98%a0%e5%b0%84%e5%92%8c%e8%bf%87%e6%bb%a4","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202847\/","title":{"rendered":"\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u6620\u5c04\u548c\u8fc7\u6ee4"},"content":{"rendered":"

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

\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u6620\u5c04\u548c\u8fc7\u6ee4<\/h1>\n

\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u662f\u7ed3\u5408\u6211\u4e4b\u524d\u9762\u8bd5\u7684\u5404\u79cd\u7ecf\u5386\u548c\u5b9e\u6218\u5f00\u53d1\u4e2d\u9047\u5230\u7684\u95ee\u9898\u89e3\u51b3\u7ecf\u9a8c\u6574\u7406\u7684\uff0c\u5e0c\u671b\u8fd9\u7bc7\u300a\u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u6620\u5c04\u548c\u8fc7\u6ee4\u300b\u5bf9\u4f60\u6709\u5f88\u5927\u5e2e\u52a9\uff01\u6b22\u8fce\u6536\u85cf\uff0c\u5206\u4eab\u7ed9\u66f4\u591a\u7684\u9700\u8981\u7684\u670b\u53cb\u5b66\u4e60~<\/p>\n

\u5728 Java \u4e2d\uff0c\u6620\u5c04\u51fd\u6570\u5e94\u7528\u4e8e\u6bcf\u4e2a\u5143\u7d20\uff0c\u521b\u5efa\u65b0\u7684\u5217\u8868\uff1b\u8fc7\u6ee4\u51fd\u6570\u9009\u51fa\u6ee1\u8db3\u6761\u4ef6\u7684\u5143\u7d20\uff0c\u521b\u5efa\u66f4\u5c0f\u5217\u8868\u3002\u8fd9\u4e9b\u51fd\u6570\u53ef\u7528\u4e8e\u8f6c\u6362\u6570\u636e\u3001\u63d0\u53d6\u5b50\u96c6\u4ee5\u53ca\u7b80\u5316\u73b0\u5b9e\u4e16\u754c\u7684\u95ee\u9898\uff0c\u4f8b\u5982\u5904\u7406\u5ba2\u6237\u6570\u636e\u3002<\/p>\n

<\/p>\n

\u5728 Java \u4e2d\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\uff1a\u6620\u5c04\u548c\u8fc7\u6ee4<\/strong><\/p>\n

\u51fd\u6570\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u7f16\u7a0b\u8303\u4f8b\uff0c\u5b83\u5f3a\u8c03\u51fd\u6570\u7684\u4f7f\u7528\u4ee5\u53ca\u907f\u514d\u72b6\u6001\u53d8\u5316\u3002\u6620\u5c04\u548c\u8fc7\u6ee4\u662f\u51fd\u6570\u5f0f\u7f16\u7a0b\u4e2d\u5e38\u89c1\u7684\u4e24\u4e2a\u64cd\u4f5c\uff0c\u5b83\u4eec\u53ef\u4ee5\u5e2e\u52a9\u7b80\u5316\u548c\u4f18\u5316\u4ee3\u7801\u3002<\/p>\n

\u6620\u5c04<\/strong><\/p>\n

\u6620\u5c04\u64cd\u4f5c\u5c06\u4e00\u4e2a\u5143\u7d20\u5217\u8868\u8f6c\u6362\u4e3a\u53e6\u4e00\u4e2a\u5217\u8868\uff0c\u5176\u4e2d\u6bcf\u4e2a\u65b0\u5143\u7d20\u90fd\u662f\u901a\u8fc7\u5c06\u7ed9\u5b9a\u7684\u51fd\u6570\u5e94\u7528\u4e8e\u539f\u59cb\u5217\u8868\u4e2d\u7684\u76f8\u5e94\u5143\u7d20\u800c\u521b\u5efa\u7684\u3002\u5b83\u7ecf\u5e38\u7528\u4e8e\u5c06\u6570\u636e\u4ece\u4e00\u79cd\u683c\u5f0f\u8f6c\u6362\u5230\u53e6\u4e00\u79cd\u683c\u5f0f\u3002<\/p>\n

\u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n

import java.util.List;\nimport java.util.stream.Collectors;\n\npublic class Mapping {\n\n    public static void main(String[] args) {\n        List<Integer> numbers = List.of(1, 2, 3, 4, 5);\n\n        \/\/\u5c06\u6bcf\u4e2a\u6570\u5b57\u4e58\u4ee5 2\n        List<Integer> doubledNumbers = numbers.stream()\n                .map(number -> number * 2)\n                .collect(Collectors.toList());\n\n        System.out.println(doubledNumbers);\n        \/\/ \u8f93\u51fa\uff1a[2, 4, 6, 8, 10]\n    }\n}<\/pre>\n
\u8fc7\u6ee4<\/strong><\/p>\n
\u8fc7\u6ee4\u64cd\u4f5c\u5c06\u4e00\u4e2a\u5143\u7d20\u5217\u8868\u7f29\u5c0f\u4e3a\u53e6\u4e00\u4e2a\u5217\u8868\uff0c\u5176\u4e2d\u5305\u542b\u6ee1\u8db3\u7ed9\u5b9a\u6761\u4ef6\u7684\u6240\u6709\u5143\u7d20\u3002\u5b83\u7ecf\u5e38\u7528\u4e8e\u4ece\u6570\u636e\u96c6\u4e2d\u63d0\u53d6\u7279\u5b9a\u5143\u7d20\u5b50\u96c6\u3002<\/p>\n
\u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n
import java.util.List;\nimport java.util.stream.Collectors;\n\npublic class Filtering {\n\n    public static void main(String[] args) {\n        List<Integer> numbers = List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);\n\n        \/\/\u8fc7\u6ee4\u51fa\u5076\u6570\n        List<Integer> evenNumbers = numbers.stream()\n                .filter(number -> number % 2 == 0)\n                .collect(Collectors.toList());\n\n        System.out.println(evenNumbers);\n        \/\/ \u8f93\u51fa\uff1a[2, 4, 6, 8, 10]\n    }\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u51fd\u6570\u5f0f\u7f16\u7a0b\u8fd8\u53ef\u4ee5\u7528\u4e8e\u89e3\u51b3\u5404\u79cd\u73b0\u5b9e\u4e16\u754c\u7684\u95ee\u9898\uff0c\u4f8b\u5982\uff1a<\/p>\n
    \n
  • \u5904\u7406\u5927\u578b\u6570\u636e\u96c6<\/li>\n
  • \u4f18\u5316\u7b97\u6cd5<\/li>\n
  • \u7b80\u5316\u4ee3\u7801<\/li>\n<\/ul>\n
    \u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u6620\u5c04\u548c\u8fc7\u6ee4\u6765\u4ece\u5ba2\u6237\u5217\u8868\u4e2d\u63d0\u53d6\u7b26\u5408\u7279\u5b9a\u5e74\u9f84\u8303\u56f4\u7684\u6240\u6709 VIP \u5ba2\u6237\u3002<\/p>\n
    \u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n
    import java.util.List;\nimport java.util.stream.Collectors;\n\npublic class RealWorldExample {\n\n    public static void main(String[] args) {\n        List<Customer> customers = getCustomers();\n\n        \/\/\u8fc7\u6ee4\u51fa\u7b26\u5408 VIP \u6807\u51c6\u7684\u5ba2\u6237\n        List<Customer> vipCustomers = customers.stream()\n                .filter(customer -> customer.isVip())\n                \/\/\u63d0\u53d6\u5ba2\u6237\u5e74\u9f84\n                .map(customer -> customer.getAge())\n                \/\/\u8fc7\u6ee4\u51fa\u5e74\u9f84\u5728 25 \u5230 40 \u4e4b\u95f4\u7684 VIP \u5ba2\u6237\n                .filter(age -> age >= 25 && age <= 40)\n                .collect(Collectors.toList());\n\n        System.out.println(vipCustomers);\n        \/\/ \u8f93\u51fa\uff1a[Customer{id=123, name=\"John Doe\", age=30, isVip=true}, Customer{id=456, name=\"Jane Smith\", age=35, isVip=true}]\n    }\n\n    private static List<Customer> getCustomers() {\n        \/\/ \u6a21\u62df\u4e00\u4e2a\u5ba2\u6237\u5217\u8868\n        return List.of(\n                new Customer(123, \"John Doe\", 30, true),\n                new Customer(456, \"Jane Smith\", 35, true),\n                new Customer(789, \"Bob Smith\", 25, false)\n        );\n    }\n\n    private static class Customer {\n        private int id;\n        private String name;\n        private int age;\n        private boolean isVip;\n\n        \/\/ \u6784\u9020\u51fd\u6570\u3001getter \u548c setter \u65b9\u6cd5\u7701\u7565\n    }\n}<\/pre>\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":"
    \u5728 Java \u4e2d\u5982\u4f55\u4f7f\u7528\u51fd\u6570\u5f0f\u7f16...<\/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-202847","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202847","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=202847"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202847\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}