{"id":114622,"date":"2024-03-22T23:31:51","date_gmt":"2024-03-22T14:31:51","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e3%83%97%e3%83%ad%e3%82%ad%e3%82%b7%e8%bb%a2%e9%80%81%e3%83%aa%e3%82%af%e3%82%a8%e3%82%b9%e3%83%88%e3%82%92%e5%ae%9f%e7%8f%be%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/"},"modified":"2024-03-27T00:37:25","modified_gmt":"2024-03-26T15:37:25","slug":"java%e3%81%a7%e3%83%97%e3%83%ad%e3%82%ad%e3%82%b7%e8%bb%a2%e9%80%81%e3%83%aa%e3%82%af%e3%82%a8%e3%82%b9%e3%83%88%e3%82%92%e5%ae%9f%e7%8f%be%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7%e3%83%97%e3%83%ad%e3%82%ad%e3%82%b7%e8%bb%a2%e9%80%81%e3%83%aa%e3%82%af%e3%82%a8%e3%82%b9%e3%83%88%e3%82%92%e5%ae%9f%e7%8f%be%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/","title":{"rendered":"java\u3067\u30d7\u30ed\u30ad\u30b7\u8ee2\u9001\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>\u30cd\u30a4\u30c6\u30a3\u30d6\u306b\u8ee2\u9001\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b Java \u306f\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3068\u306f\u3001\u5b9f\u884c\u6642\u306b\u4e0e\u3048\u3089\u308c\u305f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u30d7\u30ed\u30ad\u30b7\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u5358\u7d14\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306eRequestHandler\u3092\u5b9a\u7fa9\u3059\u308b<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title class_\">RequestHandler<\/span> {\r\n    String <span class=\"hljs-title function_\">handleRequest<\/span><span class=\"hljs-params\">(String request)<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u7d9a\u3044\u3066\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u3092\u884c\u3046\u5bfe\u8c61\u30af\u30e9\u30b9RealRequestHandler\u3092\u5b9f\u88c5\u3057\u3001RequestHandler\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">RealRequestHandler<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title class_\">RequestHandler<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> String <span class=\"hljs-title function_\">handleRequest<\/span><span class=\"hljs-params\">(String request)<\/span> {\r\n        <span class=\"hljs-comment\">\/\/ \u5904\u7406\u8bf7\u6c42\u7684\u5177\u4f53\u903b\u8f91<\/span>\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-string\">\"\u5904\u7406\u7ed3\u679c\"<\/span>;\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u30d7\u30ed\u30ad\u30b7\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\u524d\u306b\u307e\u305f\u306f\u5f8c\u306b\u3044\u304f\u3064\u304b\u306e\u8ffd\u52a0\u51e6\u7406\u3092\u884c\u3046InvocationHandler\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u4ee3\u7406\u30af\u30e9\u30b9ProxyRequestHandler\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.lang.reflect.InvocationHandler;\r\n<span class=\"hljs-keyword\">import<\/span> java.lang.reflect.Method;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">ProxyRequestHandler<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title class_\">InvocationHandler<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> RequestHandler realHandler;\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title function_\">ProxyRequestHandler<\/span><span class=\"hljs-params\">(RequestHandler realHandler)<\/span> {\r\n        <span class=\"hljs-built_in\">this<\/span>.realHandler = realHandler;\r\n    }\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> Object <span class=\"hljs-title function_\">invoke<\/span><span class=\"hljs-params\">(Object proxy, Method method, Object[] args)<\/span> <span class=\"hljs-keyword\">throws<\/span> Throwable {\r\n        <span class=\"hljs-comment\">\/\/ \u5728\u5904\u7406\u8bf7\u6c42\u4e4b\u524d\u8fdb\u884c\u4e00\u4e9b\u989d\u5916\u7684\u64cd\u4f5c<\/span>\r\n        System.out.println(<span class=\"hljs-string\">\"\u8bf7\u6c42\u5904\u7406\u4e4b\u524d\"<\/span>);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u8c03\u7528\u5b9e\u9645\u5904\u7406\u8bf7\u6c42\u7684\u5bf9\u8c61<\/span>\r\n        <span class=\"hljs-type\">Object<\/span> <span class=\"hljs-variable\">result<\/span> <span class=\"hljs-operator\">=<\/span> method.invoke(realHandler, args);\r\n\r\n        <span class=\"hljs-comment\">\/\/ \u5728\u5904\u7406\u8bf7\u6c42\u4e4b\u540e\u8fdb\u884c\u4e00\u4e9b\u989d\u5916\u7684\u64cd\u4f5c<\/span>\r\n        System.out.println(<span class=\"hljs-string\">\"\u8bf7\u6c42\u5904\u7406\u4e4b\u540e\"<\/span>);\r\n\r\n        <span class=\"hljs-keyword\">return<\/span> result;\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u6700\u5f8c\u306b\u3001Proxy\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u4ee3\u7406\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u305d\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> java.lang.reflect.Proxy;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Main<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-type\">RequestHandler<\/span> <span class=\"hljs-variable\">realHandler<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">RealRequestHandler<\/span>();\r\n        <span class=\"hljs-type\">ProxyRequestHandler<\/span> <span class=\"hljs-variable\">proxyHandler<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ProxyRequestHandler<\/span>(realHandler);\r\n\r\n        <span class=\"hljs-type\">RequestHandler<\/span> <span class=\"hljs-variable\">proxy<\/span> <span class=\"hljs-operator\">=<\/span> (RequestHandler) Proxy.newProxyInstance(\r\n                Main.class.getClassLoader(),\r\n                <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Class<\/span>[]{RequestHandler.class},\r\n                proxyHandler);\r\n\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">result<\/span> <span class=\"hljs-operator\">=<\/span> proxy.handleRequest(<span class=\"hljs-string\">\"\u8bf7\u6c42\u53c2\u6570\"<\/span>);\r\n        System.out.println(result);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u306e\u30b3\u30fc\u30c9\u306e\u5b9f\u884c\u306b\u3088\u3063\u3066\u3001\u30d7\u30ed\u30ad\u30b7\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u8981\u6c42\u306e\u51e6\u7406\u524d\u5f8c\u306b\u8ffd\u52a0\u306e\u60c5\u5831\u3092\u30a2\u30a6\u30c8\u30d7\u30c3\u30c8\u3059\u308b\u69d8\u5b50\u3092\u78ba\u8a8d\u3067\u304d\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30d7\u30ed\u30ad\u30b7\u306b\u3088\u308b\u8981\u6c42\u8ee2\u9001\u6a5f\u80fd\u304c\u5b9f\u73fe\u3059\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30cd\u30a4\u30c6\u30a3\u30d6\u306b\u8ee2\u9001\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u4f5c\u6210\u3059\u308b\u305f\u3081\u306b Java \u306f\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3068\u306f\u3001\u5b9f\u884c\u6642\u306b\u4e0e\u3048\u3089\u308c\u305f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u30d7\u30ed\u30ad\u30b7\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u5358\u7d14\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002  [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-114622","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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\u306f\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3068\u306f\u3001\u5b9f\u884c\u6642\u306b\u4e0e\u3048\u3089\u308c\u305f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u30d7\u30ed\u30ad\u30b7\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u3067\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u5358\u7d14\u306a\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/java\u3067\u30d7\u30ed\u30ad\u30b7\u8ee2\u9001\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-22T14:31:51+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-26T15:37:25+00:00\" \/>\n<meta name=\"author\" content=\"\u7dbe\u4e43, 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