{"id":202952,"date":"2025-05-22T11:44:27","date_gmt":"2025-05-22T03:44:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202952\/"},"modified":"2025-05-22T11:44:27","modified_gmt":"2025-05-22T03:44:27","slug":"java-%e4%b8%ad%e5%87%bd%e6%95%b0%e6%98%a0%e5%b0%84%e7%9a%84%e5%ae%9e%e7%8e%b0%e5%8e%9f%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202952\/","title":{"rendered":"Java \u4e2d\u51fd\u6570\u6620\u5c04\u7684\u5b9e\u73b0\u539f\u7406"},"content":{"rendered":"

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

Java \u4e2d\u51fd\u6570\u6620\u5c04\u7684\u5b9e\u73b0\u539f\u7406<\/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\u300aJava \u4e2d\u51fd\u6570\u6620\u5c04\u7684\u5b9e\u73b0\u539f\u7406\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

<\/p>\n

Java \u4e2d\u51fd\u6570\u6620\u5c04\u7684\u5b9e\u73b0\u539f\u7406<\/strong><\/p>\n

\u80cc\u666f<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u51fd\u6570\u6620\u5c04\u5141\u8bb8\u5c06\u4e00\u4e2a\u51fd\u6570\u4e0e\u4e00\u4e2a\u952e\u5173\u8054\uff0c\u4ee5\u4fbf\u7a0d\u540e\u901a\u8fc7\u8be5\u952e\u6765\u5f15\u7528\u8be5\u51fd\u6570\u3002\u8fd9\u5728\u5f88\u591a\u573a\u666f\u4e2d\u90fd\u5f88\u6709\u7528\uff0c\u5982\u4e8b\u4ef6\u5904\u7406\u548c\u4f9d\u8d56\u6ce8\u5165\u3002<\/p>\n

\u5b9e\u73b0\u539f\u7406<\/strong><\/p>\n

Java \u4e2d\u7684\u51fd\u6570\u6620\u5c04\u901a\u5e38\u4f7f\u7528 HashMap<\/strong> \u5b9e\u73b0\u3002HashMap<\/strong> \u662f\u4e00\u4e2a\u5b58\u50a8\u952e\u503c\u5bf9\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5176\u4e2d\u952e\u53ef\u4ee5\u662f\u4efb\u4f55\u5bf9\u8c61\uff0c\u800c\u503c\u53ef\u4ee5\u662f\u4efb\u4f55\u7c7b\u578b\u7684\u503c\u3002<\/p>\n

\u8981\u5b9e\u73b0\u51fd\u6570\u6620\u5c04\uff0c\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a HashMap<\/strong>\uff0c\u5176\u4e2d\u952e\u662f\u51fd\u6570\u7684\u6807\u8bc6\u7b26\uff0c\u800c\u503c\u662f\u51fd\u6570\u672c\u8eab\u3002<\/p>\n

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

import java.util.HashMap;\n\npublic class FunctionMapper {\n\n    private HashMap<String, Function<Integer, Integer>> functionMap = new HashMap<>();\n\n    public void addFunction(String key, Function<Integer, Integer> function) {\n        functionMap.put(key, function);\n    }\n\n    public Function<Integer, Integer> getFunction(String key) {\n        return functionMap.get(key);\n    }\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u5047\u8bbe\u6211\u4eec\u60f3\u8981\u5b9e\u73b0\u4e00\u4e2a\u51fd\u6570\u6620\u5c04\uff0c\u5c06\u4e0d\u540c\u7684\u64cd\u4f5c\u7b26\uff08\u5982\u52a0\u6cd5\u3001\u51cf\u6cd5\u548c\u4e58\u6cd5\uff09\u4e0e\u51fd\u6570\u5173\u8054\u8d77\u6765\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 FunctionMapper<\/strong> \u7c7b\u5982\u4e0b\uff1a<\/p>\n
FunctionMapper functionMapper = new FunctionMapper();\nfunctionMapper.addFunction(\"ADD\", a -> a + b);\nfunctionMapper.addFunction(\"SUBTRACT\", a -> a - b);\nfunctionMapper.addFunction(\"MULTIPLY\", a -> a * b);\n\nFunction<Integer, Integer> addFunction = functionMapper.getFunction(\"ADD\");\nSystem.out.println(addFunction.apply(10, 5)); \/\/ \u8f93\u51fa\uff1a15<\/pre>\n
\u901a\u8fc7\u4f7f\u7528\u51fd\u6570\u6620\u5c04\uff0c\u6211\u4eec\u80fd\u591f\u8f7b\u677e\u5730\u6839\u636e\u952e\u6765\u67e5\u627e\u548c\u8c03\u7528\u51fd\u6570\uff0c\u4ece\u800c\u7b80\u5316\u4ee3\u7801\u5e76\u63d0\u9ad8\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300aJava \u4e2d\u51fd\u6570\u6620\u5c04\u7684\u5b9e\u73b0\u539f\u7406\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8ejava,\u51fd\u6570\u6620\u5c04\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
Java \u4e2d\u51fd\u6570\u6620\u5c04\u7684\u5b9e\u73b0\u539f\u7406 ...<\/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-202952","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202952","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=202952"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202952\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}