{"id":203865,"date":"2025-05-22T11:42:52","date_gmt":"2025-05-22T03:42:52","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203865\/"},"modified":"2025-05-22T11:42:52","modified_gmt":"2025-05-22T03:42:52","slug":"java%e5%8a%a8%e6%80%81%e4%bb%a3%e7%90%86%e4%b8%ad%ef%bc%8cinvocationhandler%e7%9a%84%e9%9d%99%e6%80%81%e6%96%b9%e6%b3%95%e6%9c%89%e5%93%aa%e4%ba%9b%e9%9a%90%e6%82%a3%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203865\/","title":{"rendered":"Java\u52a8\u6001\u4ee3\u7406\u4e2d\uff0cInvocationHandler\u7684\u9759\u6001\u65b9\u6cd5\u6709\u54ea\u4e9b\u9690\u60a3\uff1f"},"content":{"rendered":"

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

Java\u52a8\u6001\u4ee3\u7406\u4e2d\uff0cInvocationHandler\u7684\u9759\u6001\u65b9\u6cd5\u6709\u54ea\u4e9b\u9690\u60a3\uff1f<\/h1>\n

\u6709\u5fd7\u8005\uff0c\u4e8b\u7adf\u6210\uff01\u5982\u679c\u4f60\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\uff0c\u90a3\u4e48\u672c\u6587\u300aJava\u52a8\u6001\u4ee3\u7406\u4e2d\uff0cInvocationHandler\u7684\u9759\u6001\u65b9\u6cd5\u6709\u54ea\u4e9b\u9690\u60a3\uff1f\u300b<\/span>\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff01\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec<\/span>\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/span><\/p>\n

<\/p>\n

java\u52a8\u6001\u4ee3\u7406\u4e2d\uff0cinvocationhandler\u4e2d\u7684\u9759\u6001\u65b9\u6cd5\u7684\u9690\u60a3<\/strong><\/p>\n

\u5728java\u52a8\u6001\u4ee3\u7406\u4e2d\uff0cinvocationhandler\u8d1f\u8d23\u5904\u7406\u88ab\u4ee3\u7406\u5bf9\u8c61\u7684\u65b9\u6cd5\u8c03\u7528\u3002\u5982\u679cinvocationhandler\u4e2d\u5305\u542b\u9759\u6001\u65b9\u6cd5\uff0c\u53ef\u80fd\u4f1a\u5b58\u5728\u4e00\u4e9b\u9690\u60a3\u3002<\/p>\n

\u4ee5\u7ed9\u51fa\u7684\u4ee3\u7801\u4e3a\u4f8b\uff1a<\/p>\n

class myinvocationhandler implements invocationhandler {\n\n    private static service targetservice;\n\n    @override\n    public object invoke(object proxy, method method, object[] args) throws throwable {\n        return null;\n    }\n\n    public static service getproxyservice(service target) {\n        targetservice = target;\n        \/\/ \u6267\u884c\u52a8\u6001\u4ee3\u7406\u76f8\u5173\u64cd\u4f5c\n        return (service) \/\/ ...\n    }\n}<\/pre>\n
\u5176\u4e2d\uff0ctargetservice\u662f\u4e00\u4e2a\u9759\u6001\u53d8\u91cf\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u95ee\u9898\uff1a<\/p>\n
    \n
  • \u5185\u5b58\u6cc4\u6f0f\uff1a<\/strong>\u5f53\u76ee\u6807\u5bf9\u8c61\u4e0d\u518d\u88ab\u5f15\u7528\u65f6\uff0cinvocationhandler\u4e5f\u4e0d\u4f1a\u88abgc\u6389\uff0c\u4ece\u800c\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002\u8fd9\u662f\u56e0\u4e3a\u9759\u6001\u53d8\u91cf\u6301\u6709\u5bf9targetservice\u7684\u5f3a\u5f15\u7528\u3002<\/li>\n
  • \u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\uff1a<\/strong>\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8c03\u7528invocationhandler\u7684\u9759\u6001\u65b9\u6cd5\u65f6\uff0c\u53ef\u80fd\u4f1a\u53d1\u751f\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u3002\u56e0\u4e3a\u9759\u6001\u53d8\u91cf\u5728\u6240\u6709\u7ebf\u7a0b\u4e4b\u95f4\u5171\u4eab\uff0c\u56e0\u6b64\u5bf9\u5b83\u4eec\u7684\u4fee\u6539\u6ca1\u6709\u540c\u6b65\u4fdd\u62a4\u3002<\/li>\n<\/ul>\n
    \u4e3a\u4e86\u907f\u514d\u8fd9\u4e9b\u9690\u60a3\uff0c \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442\u0441\u044f\u4f7f\u7528\u533f\u540d\u5185\u90e8\u7c7b\u5b9e\u73b0invocationhandler\uff0c\u56e0\u4e3a\u5b83\u6ca1\u6709\u9759\u6001\u5b57\u6bb5\uff1a<\/p>\n
    Service proxyInstance = (Service) Proxy.newProxyInstance(target.getClass().getClassLoader(),\ntarget.getClass().getInterfaces(), new InvocationHandler() {\n\n    @Override\n    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {\n        if (\"add\".equals(method.getName())) {\n            System.out.println(\"HELLOIDEA\");\n        }\n        return null;\n    }\n});\nproxyInstance.add();<\/pre>\n
    \u4ee5\u4e0a\u5c31\u662f\u300aJava\u52a8\u6001\u4ee3\u7406\u4e2d\uff0cInvocationHandler\u7684\u9759\u6001\u65b9\u6cd5\u6709\u54ea\u4e9b\u9690\u60a3\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    Java\u52a8\u6001\u4ee3\u7406\u4e2d\uff0cInvoca...<\/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-203865","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203865","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=203865"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203865\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}