{"id":202819,"date":"2025-05-22T11:30:25","date_gmt":"2025-05-22T03:30:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202819\/"},"modified":"2025-05-22T11:30:25","modified_gmt":"2025-05-22T03:30:25","slug":"%e9%ab%98%e9%98%b6%e5%87%bd%e6%95%b0%e5%9c%a8-java-%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202819\/","title":{"rendered":"\u9ad8\u9636\u51fd\u6570\u5728 Java \u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u7684\u5e94\u7528"},"content":{"rendered":"

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\u9ad8\u9636\u51fd\u6570\u5728 Java \u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u7684\u5e94\u7528<\/h1>\n

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\u9ad8\u9636\u51fd\u6570\u5728 Java \u4e2d\u7528\u4e8e\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u7075\u6d3b\u6027\u3001\u53ef\u6269\u5c55\u6027\u548c\u7b80\u6d01\u6027\u30021.\u7b56\u7565\u6a21\u5f0f\uff1a\u9ad8\u9636\u51fd\u6570\u5141\u8bb8\u591a\u7b97\u6cd5\u52a8\u6001\u5207\u6362\uff0c\u4f7f\u4ee3\u7801\u66f4\u5177\u9002\u5e94\u6027\uff1b2.\u53ef\u6269\u5c55\u6027\uff1a\u8f7b\u677e\u6dfb\u52a0\u65b0\u7b97\u6cd5\uff0c\u65e0\u9700\u4fee\u6539\u73b0\u6709\u4ee3\u7801\uff1b3.\u4ee3\u7801\u7b80\u6d01\uff1a\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\u7b80\u5316\u7b56\u7565\u6a21\u5f0f\u5b9e\u73b0\uff0c\u4ee3\u7801\u66f4\u52a0\u6e05\u6670\u3002<\/p>\n

<\/p>\n

\u9ad8\u9636\u51fd\u6570\u5728 Java \u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u7684\u5e94\u7528<\/strong><\/p>\n

\u5f15\u8a00<\/strong><\/p>\n

\u9ad8\u9636\u51fd\u6570\u662f\u6307\u53ef\u4ee5\u63a5\u53d7\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u51fd\u6570\u7684\u51fd\u6570\u3002\u5b83\u4eec\u5728 Java \u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\uff0c\u63d0\u4f9b\u4e86\u66f4\u7b80\u6d01\u548c\u53ef\u6269\u5c55\u7684\u4ee3\u7801\u3002<\/p>\n

\u5b9e\u6218\u6848\u4f8b\uff1a\u7b56\u7565\u6a21\u5f0f<\/strong><\/p>\n

\u7b56\u7565\u6a21\u5f0f\u5b9a\u4e49\u4e86\u4e00\u7ec4\u7b97\u6cd5\uff0c\u5141\u8bb8\u5ba2\u6237\u7aef\u5728\u8fd0\u884c\u65f6\u9009\u62e9\u7b97\u6cd5\u3002\u4f7f\u7528\u9ad8\u9636\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u7075\u6d3b\u7684\u7b56\u7565\u6a21\u5f0f\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

interface Strategy {\n    int doOperation(int num1, int num2);\n}\n\nclass AddStrategy implements Strategy {\n    @Override\n    public int doOperation(int num1, int num2) {\n        return num1 + num2;\n    }\n}\n\nclass SubtractStrategy implements Strategy {\n    @Override\n    public int doOperation(int num1, int num2) {\n        return num1 - num2;\n    }\n}\n\nclass StrategyContext {\n    private Strategy strategy;\n\n    public StrategyContext(Strategy strategy) {\n        this.strategy = strategy;\n    }\n\n    public int executeOperation(int num1, int num2) {\n        return strategy.doOperation(num1, num2);\n    }\n}\n\npublic class Main {\n    public static void main(String[] args) {\n        StrategyContext context = new StrategyContext(new AddStrategy());\n        System.out.println(context.executeOperation(10, 5)); \/\/ \u8f93\u51fa: 15\n\n        context.setStrategy(new SubtractStrategy());\n        System.out.println(context.executeOperation(10, 5)); \/\/ \u8f93\u51fa: 5\n    }\n}<\/pre>\n
\u4f18\u52bf<\/strong><\/p>\n
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  • \u7075\u6d3b\u6027\uff1a<\/strong>\u9ad8\u9636\u51fd\u6570\u5141\u8bb8\u52a8\u6001\u66f4\u6539\u7b97\u6cd5\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u9002\u5e94\u6027\u3002<\/li>\n
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    • \u547d\u4ee4\u6a21\u5f0f\uff1a<\/strong>\u5c06\u8bf7\u6c42\u5c01\u88c5\u6210\u5bf9\u8c61\u5e76\u5c06\u5176\u4f20\u9012\u7ed9\u6267\u884c\u8005\u3002<\/li>\n
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      \u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u9ad8\u9636\u51fd\u6570\u5728 Java \u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u7684\u5e94\u7528\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u9ad8\u9636\u51fd\u6570\u5728 Java \u8bbe\u8ba1\u6a21\u5f0f\u4e2d...<\/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-202819","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202819","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=202819"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202819\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202819"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202819"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202819"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}