{"id":93586,"date":"2024-03-21T16:47:43","date_gmt":"2024-03-21T07:47:43","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/spring%e3%83%97%e3%83%ad%e3%82%ad%e3%82%b7%e3%82%aa%e3%83%96%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%ae%e4%bd%9c%e6%88%90%e6%96%b9%e6%b3%95\/"},"modified":"2024-03-27T18:24:08","modified_gmt":"2024-03-27T09:24:08","slug":"spring%e3%83%97%e3%83%ad%e3%82%ad%e3%82%b7%e3%82%aa%e3%83%96%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%ae%e4%bd%9c%e6%88%90%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/spring%e3%83%97%e3%83%ad%e3%82%ad%e3%82%b7%e3%82%aa%e3%83%96%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%81%ae%e4%bd%9c%e6%88%90%e6%96%b9%e6%b3%95\/","title":{"rendered":"Spring\u30d7\u30ed\u30ad\u30b7\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u65b9\u6cd5"},"content":{"rendered":"<p>Spring\u3067\u306f\u3001\uff12\u901a\u308a\u306e\u65b9\u6cd5\u3067\u3001\u30d7\u30ed\u30ad\u30b7\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3067\u304d\u308b<\/p>\n<ol>\n<li>JDK\u306e\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3092\u7528\u3044\u305f\u65b9\u6cd5\u3002JDK\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3067\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4ecb\u3057\u3066\u30d7\u30ed\u30ad\u30b7\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u307e\u305a\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u5b9f\u88c5\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3066\u3001\u5177\u4f53\u7684\u306a\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002\u6b21\u306b\u3001InvocationHandler\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u3053\u306e\u30af\u30e9\u30b9\u3067invoke\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3057\u3001\u30d7\u30ed\u30ad\u30b7\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3073\u51fa\u3055\u308c\u305f\u3068\u304d\u306b\u51e6\u7406\u3092\u884c\u3044\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001Proxy\u30af\u30e9\u30b9\u306e\u9759\u7684\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308bnewProxyInstance\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d7\u30ed\u30ad\u30b7\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">interface<\/span> <span class=\"hljs-title class_\">UserService<\/span> {\r\n    <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">addUser<\/span><span class=\"hljs-params\">(String name)<\/span>;\r\n}\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">UserServiceImpl<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title class_\">UserService<\/span> {\r\n    <span class=\"hljs-meta\">@Override<\/span>\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">addUser<\/span><span class=\"hljs-params\">(String name)<\/span> {\r\n        System.out.println(<span class=\"hljs-string\">\"Add user: \"<\/span> + name);\r\n    }\r\n}\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">UserServiceInvocationHandler<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title class_\">InvocationHandler<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> Object target;\r\n\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-title function_\">UserServiceInvocationHandler<\/span><span class=\"hljs-params\">(Object target)<\/span> {\r\n        <span class=\"hljs-built_in\">this<\/span>.target = target;\r\n    }\r\n\r\n    <span class=\"hljs-meta\">@Override<\/span>\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        System.out.println(<span class=\"hljs-string\">\"Before method: \"<\/span> + method.getName());\r\n        <span class=\"hljs-type\">Object<\/span> <span class=\"hljs-variable\">result<\/span> <span class=\"hljs-operator\">=<\/span> method.invoke(target, args);\r\n        System.out.println(<span class=\"hljs-string\">\"After method: \"<\/span> + method.getName());\r\n        <span class=\"hljs-keyword\">return<\/span> result;\r\n    }\r\n}\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\">UserService<\/span> <span class=\"hljs-variable\">userService<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">UserServiceImpl<\/span>();\r\n        <span class=\"hljs-type\">UserServiceInvocationHandler<\/span> <span class=\"hljs-variable\">handler<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">UserServiceInvocationHandler<\/span>(userService);\r\n        <span class=\"hljs-type\">UserService<\/span> <span class=\"hljs-variable\">proxy<\/span> <span class=\"hljs-operator\">=<\/span> (UserService) Proxy.newProxyInstance(userService.getClass().getClassLoader(),\r\n                userService.getClass().getInterfaces(), handler);\r\n        proxy.addUser(<span class=\"hljs-string\">\"John\"<\/span>);\r\n    }\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>CGLIB\u306b\u3088\u308b\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\uff1aCGLIB\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u306f\u7d99\u627f\u3092\u5229\u7528\u3057\u3066\u30d7\u30ed\u30ad\u30b7\u3092\u5b9f\u73fe\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u307e\u305a\u3001\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\u3001\u6b21\u306b\u3053\u306e\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3059\u308b\u30b5\u30d6\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3001\u3055\u3089\u306b\u89aa\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4e0a\u66f8\u304d\u3057\u3066\u5177\u4f53\u7684\u306a\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002\u6b21\u306b\u3001MethodInterceptor\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u306e\u5b9f\u88c5\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3001\u3053\u3053\u3067intercept\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3057\u3001\u30d7\u30ed\u30ad\u30b7\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3073\u51fa\u3055\u308c\u305f\u3068\u304d\u306b\u51e6\u7406\u3092\u884c\u3046\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001Enhancer\u30af\u30e9\u30b9\u306ecreate\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d7\u30ed\u30ad\u30b7\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">UserService<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">addUser<\/span><span class=\"hljs-params\">(String name)<\/span> {\r\n        System.out.println(<span class=\"hljs-string\">\"Add user: \"<\/span> + name);\r\n    }\r\n}\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">UserServiceInterceptor<\/span> <span class=\"hljs-keyword\">implements<\/span> <span class=\"hljs-title class_\">MethodInterceptor<\/span> {\r\n    <span class=\"hljs-meta\">@Override<\/span>\r\n    <span class=\"hljs-keyword\">public<\/span> Object <span class=\"hljs-title function_\">intercept<\/span><span class=\"hljs-params\">(Object obj, Method method, Object[] args, MethodProxy proxy)<\/span> <span class=\"hljs-keyword\">throws<\/span> Throwable {\r\n        System.out.println(<span class=\"hljs-string\">\"Before method: \"<\/span> + method.getName());\r\n        <span class=\"hljs-type\">Object<\/span> <span class=\"hljs-variable\">result<\/span> <span class=\"hljs-operator\">=<\/span> proxy.invokeSuper(obj, args);\r\n        System.out.println(<span class=\"hljs-string\">\"After method: \"<\/span> + method.getName());\r\n        <span class=\"hljs-keyword\">return<\/span> result;\r\n    }\r\n}\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\">Enhancer<\/span> <span class=\"hljs-variable\">enhancer<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">Enhancer<\/span>();\r\n        enhancer.setSuperclass(UserService.class);\r\n        enhancer.setCallback(<span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">UserServiceInterceptor<\/span>());\r\n        <span class=\"hljs-type\">UserService<\/span> <span class=\"hljs-variable\">proxy<\/span> <span class=\"hljs-operator\">=<\/span> (UserService) enhancer.create();\r\n        proxy.addUser(<span class=\"hljs-string\">\"John\"<\/span>);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>JDK\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3001CGLIB\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3092\u554f\u308f\u305a\u3001InvocationHandler\u307e\u305f\u306fMethodInterceptor\u306e\u5b9f\u88c5\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3066\u3001\u5177\u4f53\u7684\u306a\u30d7\u30ed\u30ad\u30b7\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306b\u3001\u9069\u5207\u306a\u65b9\u6cd5\u3067\u4ee3\u7406\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3066\u3001\u5bfe\u5fdc\u3059\u308b\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306b\u4ee3\u7406\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spring\u3067\u306f\u3001\uff12\u901a\u308a\u306e\u65b9\u6cd5\u3067\u3001\u30d7\u30ed\u30ad\u30b7\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3067\u304d\u308b JDK\u306e\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3092\u7528\u3044\u305f\u65b9\u6cd5\u3002JDK\u52d5\u7684\u30d7\u30ed\u30ad\u30b7\u3067\u306f\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4ecb\u3057\u3066\u30d7\u30ed\u30ad\u30b7\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u307e\u305a\u3001\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7 [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-93586","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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