{"id":8719,"date":"2024-05-29T15:01:01","date_gmt":"2024-05-29T07:01:01","guid":{"rendered":""},"modified":"2024-05-29T15:01:01","modified_gmt":"2024-05-29T07:01:01","slug":"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f","status":"publish","type":"post","link":"https:\/\/mushiming.com\/8719.html","title":{"rendered":"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f"},"content":{"rendered":"<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> \n <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path> \n<\/svg> <\/p>\n<div class=\"toc\">\n<h4>\u4ee3\u7406\u6a21\u5f0f<\/h4>\n<ul>\n<li>\u4ee3\u7406\u6a21\u5f0f\uff08\u63a7\u5236\u5bf9\u8c61\u8bbf\u95ee\uff09<\/li>\n<li>\n<ul>\n<li>\u4ee3\u7406\u6a21\u5f0f\u662f\u4ec0\u4e48<\/li>\n<li>\u4ee3\u7406\u6a21\u5f0f\u7684\u5206\u7c7b<\/li>\n<li>\u9759\u6001\u4ee3\u7406\u6a21\u5f0f\u7684\u89d2\u8272<\/li>\n<li>\u4ee3\u9759\u6001\u7406\u6a21\u5f0f\u7684UML\u56fe<\/li>\n<li>\u9759\u6001\u4ee3\u7406\u6a21\u5f0f\u7684\u5b9e\u4f8b<\/li>\n<li>\u9759\u6001 \u4ee3\u7406\u6a21\u5f0f\u7684\u4f18\u7f3a\u70b9<\/li>\n<li>\n<ul>\n<li>\u9759\u6001\u4ee3\u7406\u6a21\u5f0f\u7684\u4f18\u70b9<\/li>\n<li>\u9759\u6001\u4ee3\u7406\u6a21\u5f0f\u7684\u7f3a\u70b9<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u52a8\u6001\u4ee3\u7406<\/li>\n<li>\n<ul>\n<li>\u52a8\u6001\u4ee3\u7406\u6d89\u53ca\u5230\u7684\u4e24\u4e2a\u7c7b<\/li>\n<li>java.lang.ClassCastException<\/li>\n<li>\u52a8\u6001\u4ee3\u7406\u7c7b\u7684\u4f18\u70b9<\/li>\n<li>\u4ee3\u7406\u6a21\u5f0f\u7684\u4f7f\u7528\u60c5\u666f<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>\n<h2>\u4ee3\u7406\u6a21\u5f0f\uff08\u63a7\u5236\u5bf9\u8c61\u8bbf\u95ee\uff09<\/h2>\n<h3>\u4ee3\u7406\u6a21\u5f0f\u662f\u4ec0\u4e48<\/h3>\n<pre class=\"language-java prettyprint linenums\"><code>                          \u4e00\u4e2a\u4ee3\u7406\u7c7b\u53bb\u4ee3\u7406\u53e6\u4e00\u4e2a\u771f\u5b9e\u7c7b\uff0c\u540c\u65f6\u4ee3\u7406\u7c7b\u53bb\u505a\u4e00\u4e9b\u6269\u5c55\u7684\u529f\u80fd\uff08\u4e0d\u53bb\u76f4\u63a5\u64cd\u4f5c\u76f4\u63a5\u7c7b\uff09\uff0c\u4f8b\u5982\n                          \u73b0\u5b9e\u751f\u6d3b\u4e2d\u7684\u623f\u5c4b\u4e2d\u4ecb\u3001\u5a5a\u4ecb\u6240\u7b49\u7b49\u3002      \n<\/code><\/pre>\n<h3>\u4ee3\u7406\u6a21\u5f0f\u7684\u5206\u7c7b<\/h3>\n<p>1\u9759\u6001\u4ee3\u7406 \uff1a\u7531\u7a0b\u5e8f\u5458\u521b\u5efa\u6216\u7279\u5b9a\u5de5\u5177\u81ea\u52a8\u751f\u6210\u6e90\u4ee3\u7801\uff0c\u5728\u5bf9\u5176\u7f16\u8bd1\u3002\u5728\u7a0b\u5e8f\u5458\u8fd0\u884c\u4e4b\u524d\uff0c\u4ee3\u7406\u7c7b.class\u6587\u4ef6\u5c31\u5df2\u7ecf\u88ab\u521b\u5efa\u4e86<\/p>\n<p>2\u52a8\u6001\u4ee3\u7406 \u5728\u7a0b\u5e8f\u8fd0\u884c\u65f6\u901a\u8fc7\u53cd\u5c04\u673a\u5236\u52a8\u6001\u521b\u5efa\u7684<\/p>\n<h3>\u9759\u6001\u4ee3\u7406\u6a21\u5f0f\u7684\u89d2\u8272<\/h3>\n<p>\u62bd\u8c61\u89d2\u8272\uff1a\u4e00\u822c\u4f1a\u4f7f\u7528\u63a5\u53e3\u6216\u8005\u62bd\u8c61\u7c7b\u6765\u89e3\u51b3\u3002<br \/> \u771f\u5b9e\u89d2\u8272\uff1a\u88ab\u4ee3\u7406\u7684\u89d2\u8272\u3002<br \/> \u4ee3\u7406\u89d2\u8272:\u4ee3\u7406\u771f\u5b9e\u89d2\u8272\uff0c\u4ee3\u7406\u771f\u5b9e\u89d2\u8272\u540e\uff0c\u4e00\u822c\u4f1a\u505a\u4e00\u4e9b\u9644\u5c5e\u64cd\u4f5c\u3002<br \/> \u5ba2\u6237\uff1a\u8bbf\u95ee\u4ee3\u7406\u5bf9\u8c61\u7684\u4eba\u3002<\/p>\n<h3>\u4ee3\u9759\u6001\u7406\u6a21\u5f0f\u7684UML\u56fe<\/h3>\n<p>\u9759\u6001\u4ee3\u7406<br \/> <img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/mushiming_com\/7fbd3999b5ab4fb0b9ff228a3c459872.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f (https:\/\/mushiming.com\/)  \u7b2c1\u5f20\" title=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f  \u7b2c1\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><\/p>\n<h3>\u9759\u6001\u4ee3\u7406\u6a21\u5f0f\u7684\u5b9e\u4f8b<\/h3>\n<p>\u9759\u6001\u4ee3\u7406\u7684\u6848\u4f8b<br \/> <img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/mushiming_com\/978e338389104fe99ccb42a0275c902e.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f (https:\/\/mushiming.com\/)  \u7b2c2\u5f20\" title=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f  \u7b2c2\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> \u62bd\u8c61\u89d2\u8272<\/p>\n<pre><code class=\"prism language-typescript\">  <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">interface<\/span> <span class=\"token class-name\">Rent<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">rent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\u771f\u5b9e\u89d2\u8272<\/p>\n<pre><code class=\"prism language-typescript\">  <span class=\"token keyword\">public<\/span>  <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Host<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">Rent<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n @Override\n <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">rent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n  System<span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u623f\u4e1c\u8981\u79df\u623f\u5b50\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\u4ee3\u7406\u89d2\u8272<\/p>\n<pre><code class=\"prism language-typescript\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Agent<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">Rent<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">public<\/span> Host host<span class=\"token punctuation\">;<\/span>\n    <span class=\"token comment\">\/\/\u4e2d\u4ecb\u4ee3\u7406\u623f\u4e1c\u7684\u6743\u5229\u53bb\u79df\u623f\u5b50<\/span>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">rent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token function\">seeHouse<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n        <span class=\"token function\">signContract<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n        host<span class=\"token punctuation\">.<\/span><span class=\"token function\">rent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n   <span class=\"token keyword\">public<\/span>  <span class=\"token function\">Agent<\/span><span class=\"token punctuation\">(<\/span>Host host<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>host<span class=\"token operator\">=<\/span>host<span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n    <span class=\"token keyword\">public<\/span> <span class=\"token function\">Agent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token punctuation\">}<\/span>\n    <span class=\"token comment\">\/\/\u770b\u623f\u5b50<\/span>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span>  <span class=\"token function\">seeHouse<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        System<span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u4e2d\u4ecb\u5e26\u79df\u5ba2\u53bb\u770b\u623f\u5b50\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n    <span class=\"token comment\">\/\/\u7b7e\u5408\u540c<\/span>\n    <span class=\"token keyword\">public<\/span>  <span class=\"token keyword\">void<\/span>  <span class=\"token function\">signContract<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        System<span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u4e2d\u4ecb\u548c\u79df\u5ba2\u7b7e\u5408\u540c\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>\u5ba2\u6237<\/p>\n<pre><code class=\"prism language-typescript\">   <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Tenant<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span>String<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token comment\">\/\/\u60f3\u79df\u623f\u5b50\u5148\u5f97\u6709\u4e2a\u623f\u4e1c<\/span>\n        Host host <span class=\"token operator\">=<\/span><span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Host<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n        <span class=\"token comment\">\/\/\u4e2d\u4ecb\u4ee3\u7406\u4e86\u623f\u4e1c<\/span>\n        Agent agent<span class=\"token operator\">=<\/span><span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Agent<\/span><span class=\"token punctuation\">(<\/span>host<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n        <span class=\"token comment\">\/\/\u901a\u8fc7\u4e2d\u4ecb\u53bb\u79df\u623f\u5b50<\/span>\n        agent<span class=\"token punctuation\">.<\/span><span class=\"token function\">rent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span> \n<\/code><\/pre>\n<h3>\u9759\u6001 \u4ee3\u7406\u6a21\u5f0f\u7684\u4f18\u7f3a\u70b9<\/h3>\n<h4>\u9759\u6001\u4ee3\u7406\u6a21\u5f0f\u7684\u4f18\u70b9<\/h4>\n<p>\u53ef\u4ee5\u4f7f\u771f\u5b9e\u89d2\u8272\u7684\u64cd\u4f5c\u66f4\u52a0\u7eaf\u7cb9\uff0c\u4e0d\u7528\u53bb\u5173\u6ce8\u4e00\u4e9b\u516c\u5173\u7684\u4e1a\u52a1<br \/> \u516c\u5171\u90e8\u5206\u4ea4\u7ed9\u4ee3\u7406\u89d2\u8272\uff0c\u4ee3\u7406\u89d2\u8272\u5b9e\u73b0\u4e1a\u52a1\u7684\u5206\u5de5<br \/> \u516c\u5171\u4e1a\u52a1\u53d1\u751f\u6269\u5c55\u65f6\uff0c\u65b9\u4fbf\u96c6\u4e2d\u7ba1\u7406<\/p>\n<h4>\u9759\u6001\u4ee3\u7406\u6a21\u5f0f\u7684\u7f3a\u70b9<\/h4>\n<p>\u4e00\u4e2a\u771f\u5b9e\u89d2\u8272\u5c31\u4f1a\u4ea7\u751f\u4e00\u4e2a\u4ee3\u7406\u89d2\u8272\uff0c\u4ee3\u7801\u91cf\u7ffb\u500d\u5f00\u53d1\u6548\u7387\u4f4e\uff0c\u5de5\u4f5c\u91cf\u592a\u5927\uff0c\u4e0d\u6613\u7ba1\u7406\u3002\u540c\u65f6\u63a5\u53e3\u4e00\u65e6\u53d1\u751f\u6539\u53d8\uff0c\u4ee3\u7406\u7c7b\u4e5f\u5f97\u76f8\u5e94\u4fee\u6539\u3002<\/p>\n<h2>\u52a8\u6001\u4ee3\u7406<\/h2>\n<pre class=\"language-java prettyprint linenums\"><code>  \u52a8\u6001\u4ee3\u7406\u548c\u9759\u6001\u4ee3\u7406\u89d2\u8272\u4e00\u6837\n \u52a8\u6001\u4ee3\u7406\u7684\u4ee3\u7406\u7c7b\u662f\u52a8\u6001\u751f\u6210\u7684\uff0c\u4e0d\u662f\u76f4\u63a5\u5199\u597d\u7684\n \u52a8\u6001\u4ee3\u7406\u5206\u4e3a\u4e24\u4e2a\u5927\u7c7b\uff1a\n     \u57fa\u4e8e\u63a5\u53e3\u7684\u52a8\u6001\u4ee3\u7406\n         JDK\u52a8\u6001\u4ee3\u7406 \n     \u57fa\u4e8e\u7c7b\u7684\u52a8\u6001\u4ee3\u7406\n            \u57fa\u4e8e\u7c7b cglib\n      java\u5b57\u8282\u7801\u5b9e\u73b0 javaSist \n<\/code><\/pre>\n<h3>\u52a8\u6001\u4ee3\u7406\u6d89\u53ca\u5230\u7684\u4e24\u4e2a\u7c7b<\/h3>\n<pre class=\"language-java prettyprint linenums\"><code> \u5b9e\u73b0\u63a5\u53e3 InvocationHandler  \u53bb\u91cd\u5199 Invoke ( )\u65b9\u6cd5\n<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/mushiming_com\/0407c99b18b745f5a2e206a369c6d228.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f (https:\/\/mushiming.com\/)  \u7b2c3\u5f20\" title=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f  \u7b2c3\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> <img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/mushiming_com\/331278431bb6496c83a39c8071482411.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f (https:\/\/mushiming.com\/)  \u7b2c4\u5f20\" title=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f  \u7b2c4\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> Proxy\u7c7b \u9759\u6001\u65b9\u6cd5 \u8c03\u7528\u7a0b\u5e8f\u5904\u7406\u89d2\u8272 \u6765\u5904\u7406\u8981\u8c03\u7528\u7684\u63a5\u53e3\u5bf9\u8c61<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/mushiming_com\/fc0819d3aa9141d39766abfd7e1ab20c.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f (https:\/\/mushiming.com\/)  \u7b2c5\u5f20\" title=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f  \u7b2c5\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><br \/> <img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/mushiming_com\/82b395e4385545e89deb93cd0b67b072.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f (https:\/\/mushiming.com\/)  \u7b2c6\u5f20\" title=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f  \u7b2c6\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><\/p>\n<p>\u52a8\u6001\u4ee3\u7406\u7684\u5b9e\u73b0<br \/> 1 \u7c7b\u7684\u5c01\u88c5<\/p>\n<pre><code class=\"prism language-typescript\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">ProxyInvocationHandler<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">InvocationHandler<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n      <span class=\"token comment\">\/\/\u88ab\u4ee3\u7406\u7684\u63a5\u53e3<\/span>\n     <span class=\"token keyword\">private<\/span> Object target<span class=\"token punctuation\">;<\/span>\n\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">setTarget<\/span><span class=\"token punctuation\">(<\/span>Object target<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n        <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>target <span class=\"token operator\">=<\/span> target<span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n\n    <span class=\"token comment\">\/\/\u751f\u6210\u5f97\u5230\u4ee3\u7406\u7c7b<\/span>\n    <span class=\"token keyword\">public<\/span> Object <span class=\"token function\">getProxy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{ \n   <!-- --><\/span>\n      <span class=\"token keyword\">return<\/span> Proxy<span class=\"token punctuation\">.<\/span><span class=\"token function\">newProxyInstance<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getClass<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getClassLoader<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span>target<span class=\"token punctuation\">.<\/span><span class=\"token function\">getClass<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getInterfaces<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><span class=\"token keyword\">this<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n\n    <span class=\"token comment\">\/\/\u5904\u7406\u4ee3\u7406\u5b9e\u4f8b\u5e76\u8fd4\u56de\u7ed3\u679c<\/span>\n    @Override\n    <span class=\"token keyword\">public<\/span> Object <span class=\"token function\">invoke<\/span><span class=\"token punctuation\">(<\/span>Object proxy<span class=\"token punctuation\">,<\/span> Method method<span class=\"token punctuation\">,<\/span> Object<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> throws Throwable <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n         <span class=\"token comment\">\/\/\u52a8\u6001\u4ee3\u7406\u7c7b\u7684\u672c\u8d28\u5c31\u662f\u53cd\u5c04<\/span>\n        Object result<span class=\"token operator\">=<\/span>method<span class=\"token punctuation\">.<\/span><span class=\"token function\">invoke<\/span><span class=\"token punctuation\">(<\/span>target<span class=\"token punctuation\">,<\/span>args<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n        <span class=\"token keyword\">return<\/span> result<span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<p>2 \u5c01\u88c5\u7c7b\u7684\u4f7f\u7528<\/p>\n<pre><code class=\"prism language-typescript\"><span class=\"token keyword\">public<\/span> <span class=\"token keyword\">class<\/span> <span class=\"token class-name\">test<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span>String<span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span> args<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{ \n   <!-- --><\/span>\n          <span class=\"token comment\">\/\/\u771f\u5b9e\u89d2\u8272<\/span>\n        Host   host<span class=\"token operator\">=<\/span><span class=\"token keyword\">new<\/span> <span class=\"token class-name\">Host<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n        <span class=\"token comment\">\/\/\u4ee3\u7406\u89d2\u8272 \u52a8\u6001\u7c7b<\/span>\n        ProxyInvocationHandler   pih <span class=\"token operator\">=<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ProxyInvocationHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n        <span class=\"token comment\">\/\/\u8bbe\u7f6e\u8981\u4ee3\u7406\u751f\u6210\u7684\u7c7b<\/span>\n        pih<span class=\"token punctuation\">.<\/span><span class=\"token function\">setTarget<\/span><span class=\"token punctuation\">(<\/span>host<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n        <span class=\"token comment\">\/\/\u52a8\u6001\u751f\u6210\u4ee3\u7406\u7c7b<\/span>\n        <span class=\"token comment\">\/\/\u6ce8\u610f \u4e00\u5b9a\u8981\u5199\u6210\u63a5\u53e3\u7c7b\u624d\u884c \u5426\u5219\u62a5\u9519<\/span>\n        Rent proxy <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span>Rent<span class=\"token punctuation\">)<\/span> pih<span class=\"token punctuation\">.<\/span><span class=\"token function\">getProxy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n\n        proxy<span class=\"token punctuation\">.<\/span><span class=\"token function\">rent<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\n    <span class=\"token punctuation\">}<\/span>\n<span class=\"token punctuation\">}<\/span>\n<\/code><\/pre>\n<h3>java.lang.ClassCastException<\/h3>\n<p>\u56e0\u4e3a\u662f\u5728ProxyInvocationHandler\u91cc\u9762\u7684Proxy.newProxyInstance\uff08\uff09\u5b9e\u73b0\u7684\u662f\u4e00\u4e2a\u63a5\u53e3 \u6240\u4ee5\u5f97\u5230\u7684\u4e5f\u5e94\u8be5\u662f\u63a5\u53e3\u7c7b \u4e0d\u80fd\u5199\u5177\u4f53\u7c7b<br \/> <img decoding=\"async\" src=\"https:\/\/img.mushiming.top\/app\/mushiming_com\/ede62e65d4994bbe99a67b20d120e382.png\" =\"\" =\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" alt=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f (https:\/\/mushiming.com\/)  \u7b2c7\u5f20\" title=\"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f  \u7b2c7\u5f20-\u7a46\u4e16\u660e\u535a\u5ba2\" ><\/p>\n<h3>\u52a8\u6001\u4ee3\u7406\u7c7b\u7684\u4f18\u70b9<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u771f\u5b9e\u89d2\u8272\u7684\u64cd\u4f5c\u66f4\u52a0\u7eaf\u7cb9\uff0c\u4e0d\u7528\u53bb\u5173\u6ce8\u4e00\u4e9b\u516c\u5173\u7684\u4e1a\u52a1<br \/> \u516c\u5171\u90e8\u5206\u4ea4\u7ed9\u4ee3\u7406\u89d2\u8272\uff0c\u4ee3\u7406\u89d2\u8272\u5b9e\u73b0\u4e1a\u52a1\u7684\u5206\u5de5<br \/> \u516c\u5171\u4e1a\u52a1\u53d1\u751f\u6269\u5c55\u65f6\uff0c\u65b9\u4fbf\u96c6\u4e2d\u7ba1\u7406<br \/> \u4e00\u4e2a\u52a8\u6001\u4ee3\u7406\u7c7b\u4ee3\u7406\u7684\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u4e00\u822c\u5bf9\u5e94\u7684\u4e00\u7c7b\u4e1a\u52a1<br \/> \u4e00\u4e2a\u52a8\u6001\u4ee3\u7406\u7c7b\u53ef\u4ee5\u4ee3\u7406\u591a\u4e2a\u7c7b \uff0c\u53ea\u8981\u662f\u5b9e\u73b0\u4e86\u540c\u4e00\u4e2a\u63a5\u53e3\u5373\u53ef<\/p>\n<h3>\u4ee3\u7406\u6a21\u5f0f\u7684\u4f7f\u7528\u60c5\u666f<\/h3>\n<p>Spring\u91cc\u9762\u7684AOP\u5b9e\u73b0\u5c31\u662f\u91c7\u7528\u4e86\u4ee3\u7406\u6a21\u5f0f<br \/> 1\u3001\u8fdc\u7a0b\u4ee3\u7406\u3002 2\u3001\u865a\u62df\u4ee3\u7406\u3002 3\u3001Copy-on-Write \u4ee3\u7406\u3002 4\u3001\u4fdd\u62a4\uff08Protect or Access\uff09\u4ee3\u7406\u3002 5\u3001Cache\u4ee3\u7406\u3002 6\u3001\u9632\u706b\u5899\uff08Firewall\uff09\u4ee3\u7406\u3002 7\u3001\u540c\u6b65\u5316\uff08Synchronization\uff09\u4ee3\u7406\u3002 8\u3001\u667a\u80fd\u5f15\u7528\uff08Smart Reference\uff09\u4ee3\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f_23\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f\u4ee3\u7406\u6a21\u5f0f\uff08\u63a7\u5236\u5bf9\u8c61\u8bbf\u95ee\uff09\u4ee3\u7406\u6a21\u5f0f\u662f\u4ec0\u4e48\u4ee3\u7406\u6a21\u5f0f\u7684\u5206\u7c7b\u4ee3\u7406\u6a21\u5f0f\u7684\u89d2\u8272\u4ee3\u7406\u6a21\u5f0f\u7684...","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/8719"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=8719"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/8719\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=8719"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=8719"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=8719"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}