{"id":2183,"date":"2017-11-07T20:28:34","date_gmt":"2017-11-07T12:28:34","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=2183"},"modified":"2026-08-18T11:26:03","modified_gmt":"2026-08-18T03:26:03","slug":"aop-%e9%82%a3%e7%82%b9%e4%ba%8b%e5%84%bf","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=2183","title":{"rendered":"AOP \u90a3\u70b9\u4e8b\u513f"},"content":{"rendered":"
\n

AOP<\/strong>\uff08\u9762\u5411\u5207\u9762\u7f16\u7a0b\uff09\u662f\u5bf9 OOP \u7684\u8865\u5145\u800c\u4e0d\u662f\u66ff\u4ee3\uff1a\u628a\u65e5\u5fd7\u3001\u4e8b\u52a1\u3001\u9274\u6743\u8fd9\u7c7b\u6a2a\u5207\u903b\u8f91\u4ece\u4e1a\u52a1\u65b9\u6cd5\u91cc\u62bd\u51fa\u53bb\uff0c\u7528\u4e00\u628a\u201c\u5200\u201d\u6a2a\u5207\u4e00\u5768\u201c\u9762\u201d\u3002<\/p>\n

\u672c\u6587\u4ece\u5199\u6b7b before\/after\uff0c\u8bb2\u5230\u9759\u6001\u4ee3\u7406\u3001JDK \u52a8\u6001\u4ee3\u7406\u3001CGLib\uff0c\u518d\u8fdb\u5165 Spring AOP \u7684\u524d\u7f6e\u3001\u540e\u7f6e\u3001\u73af\u7ed5\u3001\u629b\u51fa\u548c\u5f15\u5165\u589e\u5f3a\uff1b\u6982\u5ff5\u6700\u65e9\u4e0d\u6765\u81ea Rod Johnson\uff0c\u5982\u4eca\u6700\u5e38\u7528\u7684\u662f Spring + AspectJ\u3002<\/p>\n

\u4eca\u5929\u6211\u8981\u548c\u5927\u5bb6\u5206\u4eab\u7684\u662f AOP\uff08Aspect-Oriented Programming\uff09\u8fd9\u4e2a\u4e1c\u897f\uff0c\u540d\u5b57\u4e0e OOP \u4ec5\u5dee\u4e00\u4e2a\u5b57\u6bcd\uff0c\u5176\u5b9e\u5b83\u662f\u5bf9 OOP \u7f16\u7a0b\u65b9\u5f0f\u7684\u4e00\u79cd\u8865\u5145\uff0c\u5e76\u975e\u662f\u53d6\u800c\u4ee3\u4e4b\u3002\u7ffb\u8bd1\u8fc7\u6765\u5c31\u662f\u201c\u9762\u5411\u65b9\u9762\u7f16\u7a0b\u201d\uff0c\u53ef\u6211\u66f4\u503e\u5411\u4e8e\u7ffb\u8bd1\u4e3a\u201c\u9762\u5411\u5207\u9762\u7f16\u7a0b\u201d\u3002\u5b83\u542c\u8d77\u6709\u4e9b\u7684\u795e\u79d8\uff0c\u4e3a\u4ec0\u4e48\u5462\uff1f\u5f53\u4f60\u770b\u5b8c\u8fd9\u7bc7\u6587\u7ae0\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u77e5\u9053\uff0c\u6211\u4eec\u505a\u7684\u5f88\u91cd\u8981\u7684\u5de5\u4f5c\u5c31\u662f\u53bb\u5199\u8fd9\u4e2a\u201c\u5207\u9762\u201d \u3002\u90a3\u4e48\u4ec0\u4e48\u662f\u201c\u5207\u9762\u201d\u5462\uff1f<\/p>\n

\u6ca1\u9519\uff01\u5c31\u662f\u7528\u4e00\u628a\u5200\u6765\u5207\u4e00\u5768\u9762\u3002\u6ce8\u610f\uff0c\u76f8\u5bf9\u4e8e\u9762\u800c\u8a00\uff0c\u6211\u4eec\u4e00\u5b9a\u662f\u6a2a\u7740\u6765\u5207\u5b83\uff0c\u8fd9\u7b80\u79f0\u4e3a\u201c\u6a2a\u5207\u201d\u3002\u53ef\u4ee5\u628a\u4e00\u6bb5\u4ee3\u7801\u60f3\u8c61\u6210\u4e00\u5768\u9762\uff0c\u540c\u6837\u4e5f\u53ef\u4ee5\u7528\u4e00\u628a\u5200\u6765\u6a2a\u5207\u5b83\uff0c\u4e0b\u9762\u8981\u505a\u7684\u5c31\u662f\u5982\u4f55\u53bb\u5b9e\u73b0\u8fd9\u628a\u5200\uff01<\/p>\n

\u9700\u8981\u6f84\u6e05\u7684\u662f\uff0c\u8fd9\u4e2a\u6982\u5ff5\u4e0d\u662f\u7531\u00a0Rod Johnson\uff08\u8001\u7f57\uff09\u63d0\u51fa\u7684\u3002\u5176\u5b9e\u5f88\u65e9\u4ee5\u524d\u5c31\u6709\u4e86\uff0c\u76ee\u524d\u6700\u77e5\u540d\u6700\u5f3a\u5927\u7684 Java \u5f00\u6e90\u9879\u76ee\u5c31\u662f AspectJ \u4e86\uff0c\u7136\u800c\u5b83\u7684\u524d\u8eab\u662f\u00a0AspectWerkz\uff08\u8be5\u9879\u76ee\u5df2\u7ecf\u5728 2005 \u5e74\u505c\u6b62\u66f4\u65b0\uff09\uff0c\u8fd9\u624d\u662f AOP \u7684\u8001\u7956\u5b97\u3002\u8001\u7f57\uff08\u4e00\u4e2a\u5934\u53d1\u79c3\u5f97\u548c\u6211\u8001\u7238\u6709\u4e00\u62fc\u7684\u5929\u624d\uff09\u5199\u4e86\u4e00\u4e2a\u53eb\u505a\u00a0Spring \u6846\u67b6\uff0c\u4ece\u6b64\u4e00\u70ae\u8d70\u7ea2\uff0c\u6210\u4e3a\u4e86 Spring \u4e4b\u7236\u3002\u4ed6\u5728\u81ea\u5df1\u7684\u00a0IOC \u7684\u57fa\u7840\u4e4b\u4e0a\uff0c\u53c8\u5b9e\u73b0\u4e86\u4e00\u5957 AOP \u7684\u6846\u67b6\uff0c\u540e\u6765\u4eff\u4f5b\u53d1\u73b0\u81ea\u5df1\u8d8a\u6765\u8d8a\u8d70\u8fdb\u6df1\u6e0a\u91cc\uff0c\u5728\u4e0d\u80fd\u81ea\u62d4\u7684\u65f6\u5019\uff0c\u6709\u4eba\u5efa\u8bae\u4ed6\u8fd8\u662f\u96c6\u6210 AspectJ \u5427\uff0c\u4ed6\u5728\u4e07\u822c\u65e0\u5948\u4e4b\u4e0b\u624d\u63a5\u53d7\u4e86\u8be5\u5efa\u8bae\u3002\u4e8e\u662f\uff0c\u6211\u4eec\u73b0\u5728\u7528\u5f97\u6700\u591a\u7684\u60f3\u5fc5\u5c31\u662f Spring + AspectJ \u8fd9\u79cd AOP \u6846\u67b6\u4e86\u3002<\/p>\n

\u90a3\u4e48 AOP \u5230\u5e95\u662f\u4ec0\u4e48\uff1f\u5982\u4f55\u53bb\u4f7f\u7528\u5b83\uff1f\u672c\u6587\u5c06\u9010\u6b65\u5e26\u60a8\u8fdb\u5165 AOP \u7684\u4e16\u754c\uff0c\u8ba9\u60a8\u611f\u53d7\u5230\u524d\u6240\u672a\u6709\u7684\u7545\u5feb\uff01<\/p>\n

\u4e0d\u8fc7\u5728\u5f00\u59cb\u8bb2\u89e3 AOP \u4e4b\u524d\uff0c\u6211\u60f3\u6709\u5fc5\u8981\u56de\u5fc6\u4e00\u4e0b\u8fd9\u6bb5\u4ee3\u7801\uff1a<\/p>\n

1. \u5199\u6b7b\u4ee3\u7801<\/h2>\n

\u5148\u6765\u4e00\u4e2a\u63a5\u53e3\uff1a<\/p>\n

public<\/span><\/span>\u00a0interface<\/span><\/span><\/span>\u00a0<\/span>Greeting<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0void<\/span><\/span><\/span>\u00a0<\/span>sayHello<\/span><\/span><\/span>(String\u00a0name)<\/span><\/span><\/span><\/span>;\n\n}<\/code><\/pre>\n
\u8fd8\u6709\u4e00\u4e2a\u5b9e\u73b0\u7c7b\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>GreetingImpl<\/span><\/span><\/span>\u00a0<\/span>implements<\/span><\/span><\/span>\u00a0<\/span>Greeting<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>sayHello<\/span><\/span><\/span>(String\u00a0name)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0before();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Hello!\u00a0\"<\/span><\/span>\u00a0+\u00a0name);\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0after();\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>before<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Before\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>after<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"After\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
before() \u4e0e after() \u65b9\u6cd5\u5199\u6b7b\u5728 sayHello() \u65b9\u6cd5\u4f53\u4e2d\u4e86\uff0c\u8fd9\u6837\u7684\u4ee3\u7801\u7684\u5473\u9053\u975e\u5e38\u4e0d\u597d\u3002\u5982\u679c\u54ea\u4f4d\u4ec1\u5144\u5927\u91cf\u5199\u4e86\u8fd9\u6837\u7684\u4ee3\u7801\uff0c\u80af\u5b9a\u8981\u88ab\u4f60\u7684\u67b6\u6784\u5e08\u9a82\u4e2a\u591f\u545b\u3002<\/p>\n
\u6bd4\u5982\uff1a\u6211\u4eec\u8981\u7edf\u8ba1\u6bcf\u4e2a\u65b9\u6cd5\u7684\u6267\u884c\u65f6\u95f4\uff0c\u4ee5\u5bf9\u6027\u80fd\u4f5c\u51fa\u8bc4\u4f30\uff0c\u90a3\u662f\u4e0d\u662f\u8981\u5728\u6bcf\u4e2a\u65b9\u6cd5\u7684\u4e00\u5934\u4e00\u5c3e\u90fd\u505a\u70b9\u624b\u811a\u5462\uff1f<\/p>\n
\u518d\u6bd4\u5982\uff1a\u6211\u4eec\u8981\u5199\u4e00\u4e2a JDBC \u7a0b\u5e8f\uff0c\u90a3\u662f\u4e0d\u662f\u4e5f\u8981\u5728\u65b9\u6cd5\u7684\u5f00\u5934\u53bb\u8fde\u63a5\u6570\u636e\u5e93\uff0c\u65b9\u6cd5\u7684\u672b\u5c3e\u53bb\u5173\u95ed\u6570\u636e\u5e93\u8fde\u63a5\u5462\uff1f<\/p>\n
\u8fd9\u6837\u7684\u4ee3\u7801\u53ea\u4f1a\u628a\u7a0b\u5e8f\u5458\u7d2f\u6b7b\uff0c\u628a\u67b6\u6784\u5e08\u6c14\u6b7b\uff01<\/p>\n
\u4e00\u5b9a\u8981\u60f3\u529e\u6cd5\u5bf9\u4e0a\u9762\u7684\u4ee3\u7801\u8fdb\u884c\u91cd\u6784\uff0c\u9996\u5148\u7ed9\u51fa\u4e09\u4e2a\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n
2. \u9759\u6001\u4ee3\u7406<\/h2>\n
\u6700\u7b80\u5355\u7684\u89e3\u51b3\u65b9\u6848\u5c31\u662f\u4f7f\u7528\u9759\u6001\u4ee3\u7406\u6a21\u5f0f\u4e86\uff0c\u6211\u4eec\u5355\u72ec\u4e3a GreetingImpl \u8fd9\u4e2a\u7c7b\u5199\u4e00\u4e2a\u4ee3\u7406\u7c7b\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>GreetingProxy<\/span><\/span><\/span>\u00a0<\/span>implements<\/span><\/span><\/span>\u00a0<\/span>Greeting<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span>\u00a0GreetingImpl\u00a0greetingImpl;\n\n\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>GreetingProxy<\/span><\/span><\/span>(GreetingImpl\u00a0greetingImpl)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this<\/span><\/span>.greetingImpl\u00a0=\u00a0greetingImpl;\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>sayHello<\/span><\/span><\/span>(String\u00a0name)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0before();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0greetingImpl.sayHello(name);\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0after();\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>before<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Before\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>after<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"After\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u5c31\u7528\u8fd9\u4e2a GreetingProxy \u53bb\u4ee3\u7406 GreetingImpl\uff0c\u4e0b\u9762\u770b\u770b\u5ba2\u6237\u7aef\u5982\u4f55\u6765\u8c03\u7528\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>Client<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>static<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>main<\/span><\/span><\/span>(String[]\u00a0args)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Greeting\u00a0greetingProxy\u00a0=\u00a0new<\/span><\/span>\u00a0GreetingProxy(new<\/span><\/span>\u00a0GreetingImpl());\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0greetingProxy.sayHello(\"Jack\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u8fd9\u6837\u5199\u6ca1\u9519\uff0c\u4f46\u662f\u6709\u4e2a\u95ee\u9898\uff0cXxxProxy \u8fd9\u6837\u7684\u7c7b\u4f1a\u8d8a\u6765\u8d8a\u591a\uff0c\u5982\u4f55\u624d\u80fd\u5c06\u8fd9\u4e9b\u4ee3\u7406\u7c7b\u5c3d\u53ef\u80fd\u51cf\u5c11\u5462\uff1f\u6700\u597d\u53ea\u6709\u4e00\u4e2a\u4ee3\u7406\u7c7b\u3002<\/p>\n
\u8fd9\u65f6\u6211\u4eec\u5c31\u9700\u8981\u4f7f\u7528 JDK \u63d0\u4f9b\u7684\u52a8\u6001\u4ee3\u7406\u4e86\u3002<\/p>\n
3. JDK \u52a8\u6001\u4ee3\u7406<\/h2>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>JDKDynamicProxy<\/span><\/span><\/span>\u00a0<\/span>implements<\/span><\/span><\/span>\u00a0<\/span>InvocationHandler<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span>\u00a0Object\u00a0target;\n\n\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>JDKDynamicProxy<\/span><\/span><\/span>(Object\u00a0target)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this<\/span><\/span>.target\u00a0=\u00a0target;\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0@SuppressWarnings<\/span><\/span>(\"unchecked\"<\/span><\/span>)\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span>\u00a0<T>\u00a0T\u00a0<\/span>getProxy<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span><\/span>\u00a0(T)\u00a0Proxy.newProxyInstance(\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0target.getClass().getClassLoader(),\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0target.getClass().getInterfaces(),\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0this<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0Object\u00a0<\/span>invoke<\/span><\/span><\/span>(Object\u00a0proxy,\u00a0Method\u00a0method,\u00a0Object[]\u00a0args)<\/span><\/span><\/span>\u00a0<\/span>throws<\/span><\/span><\/span>\u00a0Throwable\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0before();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Object\u00a0result\u00a0=\u00a0method.invoke(target,\u00a0args);\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0after();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span><\/span>\u00a0result;\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>before<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Before\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>after<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"After\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u5ba2\u6237\u7aef\u662f\u8fd9\u6837\u8c03\u7528\u7684\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>Client<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>static<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>main<\/span><\/span><\/span>(String[]\u00a0args)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Greeting\u00a0greeting\u00a0=\u00a0new<\/span><\/span>\u00a0JDKDynamicProxy(new<\/span><\/span>\u00a0GreetingImpl()).getProxy();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0greeting.sayHello(\"Jack\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u8fd9\u6837\u6240\u6709\u7684\u4ee3\u7406\u7c7b\u90fd\u5408\u5e76\u5230\u52a8\u6001\u4ee3\u7406\u7c7b\u4e2d\u4e86\uff0c\u4f46\u8fd9\u6837\u505a\u4ecd\u7136\u5b58\u5728\u4e00\u4e2a\u95ee\u9898\uff1aJDK \u7ed9\u6211\u4eec\u63d0\u4f9b\u7684\u52a8\u6001\u4ee3\u7406\u53ea\u80fd\u4ee3\u7406\u63a5\u53e3\uff0c\u800c\u4e0d\u80fd\u4ee3\u7406\u6ca1\u6709\u63a5\u53e3\u7684\u7c7b\u3002\u6709\u4ec0\u4e48\u65b9\u6cd5\u53ef\u4ee5\u89e3\u51b3\u5462\uff1f<\/p>\n
4. CGLib \u52a8\u6001\u4ee3\u7406<\/h2>\n
\u6211\u4eec\u4f7f\u7528\u5f00\u6e90\u7684 CGLib \u7c7b\u5e93\u53ef\u4ee5\u4ee3\u7406\u6ca1\u6709\u63a5\u53e3\u7684\u7c7b\uff0c\u8fd9\u6837\u5c31\u5f25\u8865\u4e86 JDK \u7684\u4e0d\u8db3\u3002CGLib \u52a8\u6001\u4ee3\u7406\u7c7b\u662f\u8fd9\u6837\u73a9\u7684\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>CGLibDynamicProxy<\/span><\/span><\/span>\u00a0<\/span>implements<\/span><\/span><\/span>\u00a0<\/span>MethodInterceptor<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span>\u00a0static<\/span><\/span>\u00a0CGLibDynamicProxy\u00a0instance\u00a0=\u00a0new<\/span><\/span>\u00a0CGLibDynamicProxy();\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>CGLibDynamicProxy<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>static<\/span><\/span><\/span>\u00a0CGLibDynamicProxy\u00a0<\/span>getInstance<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span><\/span>\u00a0instance;\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0@SuppressWarnings<\/span><\/span>(\"unchecked\"<\/span><\/span>)\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span>\u00a0<T>\u00a0T\u00a0<\/span>getProxy<\/span><\/span><\/span>(Class<T>\u00a0cls)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span><\/span>\u00a0(T)\u00a0Enhancer.create(cls,\u00a0this<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0Object\u00a0<\/span>intercept<\/span><\/span><\/span>(Object\u00a0target,\u00a0Method\u00a0method,\u00a0Object[]\u00a0args,\u00a0MethodProxy\u00a0proxy)<\/span><\/span><\/span>\u00a0<\/span>throws<\/span><\/span><\/span>\u00a0Throwable\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0before();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Object\u00a0result\u00a0=\u00a0proxy.invokeSuper(target,\u00a0args);\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0after();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span><\/span>\u00a0result;\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>before<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Before\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>after<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"After\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u4ee5\u4e0a\u4ee3\u7801\u4e2d\u4e86 Singleton \u6a21\u5f0f\uff0c\u90a3\u4e48\u5ba2\u6237\u7aef\u8c03\u7528\u4e5f\u66f4\u52a0\u8f7b\u677e\u4e86\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span>\u00a0Client\u00a0{\n\n\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>static<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>main<\/span><\/span><\/span>(String[]\u00a0args)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Greeting\u00a0greeting\u00a0=\u00a0CGLibDynamicProxy.getInstance().getProxy(GreetingImpl.class<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0greeting.sayHello(\"Jack\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u5230\u6b64\u4e3a\u6b62\uff0c\u6211\u4eec\u80fd\u505a\u7684\u90fd\u505a\u4e86\uff0c\u95ee\u9898\u4f3c\u4e4e\u5168\u90e8\u90fd\u89e3\u51b3\u4e86\u3002\u4f46\u4e8b\u60c5\u603b\u4e0d\u4f1a\u90a3\u4e48\u5b8c\u7f8e\uff0c\u800c\u6211\u4eec\u4e00\u5b9a\u8981\u8ffd\u6c42\u5b8c\u7f8e\uff01<\/p>\n
\u8001\u7f57\u641e\u51fa\u4e86\u4e00\u4e2a AOP \u6846\u67b6\uff0c\u80fd\u5426\u505a\u5230\u5b8c\u7f8e\u800c\u4f18\u96c5\u5462\uff1f\u8bf7\u5927\u5bb6\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427\uff01<\/p>\n
5.\u00a0Spring AOP\uff1a\u524d\u7f6e\u589e\u5f3a\u3001\u540e\u7f6e\u589e\u5f3a\u3001\u73af\u7ed5\u589e\u5f3a\uff08\u7f16\u7a0b\u5f0f\uff09<\/h2>\n
\u5728 Spring AOP \u7684\u4e16\u754c\u91cc\uff0c\u4e0e AOP \u76f8\u5173\u7684\u672f\u8bed\u5b9e\u5728\u592a\u591a\uff0c\u5f80\u5f80\u4e5f\u662f\u6211\u4eec\u7684\u201c\u62e6\u8def\u864e\u201d\uff0c\u4e0d\u7ba1\u662f\u770b\u90a3\u672c\u4e66\u6216\u662f\u6280\u672f\u6587\u6863\uff0c\u5728\u5f00\u5934\u90fd\u8981\u5c06\u8fd9\u4e9b\u672f\u8bed\u9010\u4e2a\u704c\u8f93\u7ed9\u8bfb\u8005\u3002\u6211\u60f3\u8fd9\u5b8c\u5168\u662f\u5728\u5413\u552c\u4eba\u4e86\uff0c\u5176\u5b9e\u6ca1\u90a3\u4e48\u590d\u6742\u7684\uff0c\u5927\u5bb6\u653e\u8f7b\u677e\u4e00\u70b9\u3002<\/p>\n
\u6211\u4eec\u4e0a\u9762\u4f8b\u5b50\u4e2d\u63d0\u5230\u7684 before() \u65b9\u6cd5\uff0c\u5728 Spring AOP \u91cc\u5c31\u53eb Before Advice\uff08\u524d\u7f6e\u589e\u5f3a\uff09\u3002<\/strong>\u6709\u4e9b\u4eba\u5c06 Advice \u76f4\u8bd1\u4e3a\u201c\u901a\u77e5\u201d\uff0c\u6211\u60f3\u8fd9\u662f\u4e0d\u592a\u5408\u9002\u7684\uff0c\u56e0\u4e3a\u5b83\u6839\u672c\u5c31\u6ca1\u6709\u201c\u901a\u77e5\u201d\u7684\u542b\u4e49\uff0c\u800c\u662f\u5bf9\u539f\u6709\u4ee3\u7801\u529f\u80fd\u7684\u4e00\u79cd\u201c\u589e\u5f3a\u201d\u3002\u518d\u8bf4\uff0cCGLib \u4e2d\u4e5f\u6709\u4e00\u4e2a\u00a0Enhancer \u7c7b\uff0c\u5b83\u5c31\u662f\u4e00\u4e2a\u589e\u5f3a\u7c7b\u3002<\/p>\n
\u6b64\u5916\uff0c\u50cf after() \u8fd9\u6837\u7684\u65b9\u6cd5\u5c31\u53eb After Advice\uff08\u540e\u7f6e\u589e\u5f3a\uff09<\/strong>\uff0c\u56e0\u4e3a\u5b83\u653e\u5728\u540e\u9762\u6765\u589e\u5f3a\u4ee3\u7801\u7684\u529f\u80fd\u3002<\/p>\n
\u5982\u679c\u80fd\u628a before() \u4e0e after() \u5408\u5e76\u5728\u4e00\u8d77\uff0c\u90a3\u5c31\u53eb Around Advice\uff08\u73af\u7ed5\u589e\u5f3a\uff09<\/strong>\uff0c\u5c31\u50cf\u6c49\u5821\u4e00\u6837\uff0c\u4e2d\u95f4\u5939\u4e00\u6839\u706b\u817f\u3002<\/p>\n
\u8fd9\u4e09\u4e2a\u6982\u5ff5\u662f\u4e0d\u662f\u8f7b\u677e\u5730\u7406\u89e3\u4e86\u5462\uff1f\u5982\u679c\u662f\uff0c\u90a3\u5c31\u7ee7\u7eed\u5427\uff01<\/p>\n
\u6211\u4eec\u4e0b\u9762\u8981\u505a\u7684\u5c31\u662f\u53bb\u5b9e\u73b0\u8fd9\u4e9b\u6240\u8c13\u7684\u201c\u589e\u5f3a\u7c7b\u201d\uff0c\u8ba9\u4ed6\u4eec\u6a2a\u5207\u5230\u4ee3\u7801\u4e2d\uff0c\u800c\u4e0d\u662f\u5c06\u8fd9\u4e9b\u5199\u6b7b\u5728\u4ee3\u7801\u4e2d\u3002<\/p>\n
\u5148\u6765\u4e00\u4e2a\u524d\u7f6e\u589e\u5f3a\u7c7b\u5427\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>GreetingBeforeAdvice<\/span><\/span><\/span>\u00a0<\/span>implements<\/span><\/span><\/span>\u00a0<\/span>MethodBeforeAdvice<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>before<\/span><\/span><\/span>(Method\u00a0method,\u00a0Object[]\u00a0args,\u00a0Object\u00a0target)<\/span><\/span><\/span>\u00a0<\/span>throws<\/span><\/span><\/span>\u00a0Throwable\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Before\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u6ce8\u610f\uff1a\u8fd9\u4e2a\u7c7b\u5b9e\u73b0\u4e86\u00a0org.springframework.aop.MethodBeforeAdvice \u63a5\u53e3\uff0c\u6211\u4eec\u5c06\u9700\u8981\u589e\u5f3a\u7684\u4ee3\u7801\u653e\u5165\u5176\u4e2d\u3002<\/p>\n
\u518d\u6765\u4e00\u4e2a\u540e\u7f6e\u589e\u5f3a\u7c7b\u5427\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>GreetingAfterAdvice<\/span><\/span><\/span>\u00a0<\/span>implements<\/span><\/span><\/span>\u00a0<\/span>AfterReturningAdvice<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>afterReturning<\/span><\/span><\/span>(Object\u00a0result,\u00a0Method\u00a0method,\u00a0Object[]\u00a0args,\u00a0Object\u00a0target)<\/span><\/span><\/span>\u00a0<\/span>throws<\/span><\/span><\/span>\u00a0Throwable\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"After\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u7c7b\u4f3c\u5730\uff0c\u8fd9\u4e2a\u7c7b\u5b9e\u73b0\u4e86\u00a0org.springframework.aop.AfterReturningAdvice \u63a5\u53e3\u3002<\/p>\n
\u6700\u540e\u7528\u4e00\u4e2a\u5ba2\u6237\u7aef\u6765\u628a\u5b83\u4eec\u96c6\u6210\u8d77\u6765\uff0c\u770b\u770b\u5982\u4f55\u8c03\u7528\u5427\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>Client<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>static<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>main<\/span><\/span><\/span>(String[]\u00a0args)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ProxyFactory\u00a0proxyFactory\u00a0=\u00a0new<\/span><\/span>\u00a0ProxyFactory();\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u521b\u5efa\u4ee3\u7406\u5de5\u5382<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0proxyFactory.setTarget(new<\/span><\/span>\u00a0GreetingImpl());\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u5c04\u5165\u76ee\u6807\u7c7b\u5bf9\u8c61<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0proxyFactory.addAdvice(new<\/span><\/span>\u00a0GreetingBeforeAdvice());\u00a0\/\/\u00a0\u6dfb\u52a0\u524d\u7f6e\u589e\u5f3a<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0proxyFactory.addAdvice(new<\/span><\/span>\u00a0GreetingAfterAdvice());\u00a0\u00a0\/\/\u00a0\u6dfb\u52a0\u540e\u7f6e\u589e\u5f3a\u00a0<\/span><\/span>\n\n\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Greeting\u00a0greeting\u00a0=\u00a0(Greeting)\u00a0proxyFactory.getProxy();\u00a0\/\/\u00a0\u4ece\u4ee3\u7406\u5de5\u5382\u4e2d\u83b7\u53d6\u4ee3\u7406<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0greeting.sayHello(\"Jack\"<\/span><\/span>);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u8c03\u7528\u4ee3\u7406\u7684\u65b9\u6cd5<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u8bf7\u4ed4\u7ec6\u9605\u8bfb\u4ee5\u4e0a\u4ee3\u7801\u53ca\u5176\u6ce8\u91ca\uff0c\u60a8\u4f1a\u53d1\u73b0\uff0c\u5176\u5b9e Spring AOP \u8fd8\u662f\u633a\u7b80\u5355\u7684\uff0c\u5bf9\u5417\uff1f<\/p>\n
\u5f53\u7136\uff0c\u6211\u4eec\u5b8c\u5168\u53ef\u4ee5\u53ea\u5b9a\u4e49\u4e00\u4e2a\u589e\u5f3a\u7c7b\uff0c\u8ba9\u5b83\u540c\u65f6\u5b9e\u73b0\u00a0MethodBeforeAdvice \u4e0e\u00a0AfterReturningAdvice \u8fd9\u4e24\u4e2a\u63a5\u53e3\uff0c\u5982\u4e0b\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span>\u00a0GreetingBeforeAndAfterAdvice<\/span><\/span>\u00a0implements<\/span><\/span>\u00a0MethodBeforeAdvice<\/span><\/span>,\u00a0AfterReturningAdvice<\/span><\/span>\u00a0{\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public\u00a0void\u00a0before(Method\u00a0method,\u00a0Object[]\u00a0args,\u00a0Object\u00a0target)\u00a0throws\u00a0Throwable\u00a0{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out<\/span><\/span>.println<\/span><\/span>(\"Before\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public\u00a0void\u00a0afterReturning(Object\u00a0result,\u00a0Method\u00a0method,\u00a0Object[]\u00a0args,\u00a0Object\u00a0target)\u00a0throws\u00a0Throwable\u00a0{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out<\/span><\/span>.println<\/span><\/span>(\"After\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u8fd9\u6837\u6211\u4eec\u53ea\u9700\u8981\u4f7f\u7528\u4e00\u884c\u4ee3\u7801\uff0c\u540c\u65f6\u5c31\u53ef\u4ee5\u6dfb\u52a0\u524d\u7f6e\u4e0e\u540e\u7f6e\u589e\u5f3a\uff1a<\/p>\n
proxyFactory.addAdvice<\/span><\/span>(new\u00a0GreetingBeforeAndAfterAdvice());<\/code><\/pre>\n
\u521a\u624d\u6709\u63d0\u5230\u201c\u73af\u7ed5\u589e\u5f3a\u201d\uff0c\u5176\u5b9e\u8fd9\u4e2a\u4e1c\u897f\u53ef\u4ee5\u628a\u201c\u524d\u7f6e\u589e\u5f3a\u201d\u4e0e\u201c\u540e\u7f6e\u589e\u5f3a\u201d\u7684\u529f\u80fd\u7ed9\u5408\u5e76\u8d77\u6765\uff0c\u65e0\u9700\u8ba9\u6211\u4eec\u540c\u65f6\u5b9e\u73b0\u4ee5\u4e0a\u4e24\u4e2a\u63a5\u53e3\u3002<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>GreetingAroundAdvice<\/span><\/span><\/span>\u00a0<\/span>implements<\/span><\/span><\/span>\u00a0<\/span>MethodInterceptor<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0Object\u00a0<\/span>invoke<\/span><\/span><\/span>(MethodInvocation\u00a0invocation)<\/span><\/span><\/span>\u00a0<\/span>throws<\/span><\/span><\/span>\u00a0Throwable\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0before();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Object\u00a0result\u00a0=\u00a0invocation.proceed();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0after();\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return<\/span><\/span>\u00a0result;\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>before<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Before\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0private<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>after<\/span><\/span><\/span>()<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"After\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u73af\u7ed5\u589e\u5f3a\u7c7b\u9700\u8981\u5b9e\u73b0 org.aopalliance.intercept.MethodInterceptor\u00a0\u63a5\u53e3\u3002\u6ce8\u610f\uff0c\u8fd9\u4e2a\u63a5\u53e3\u4e0d\u662f Spring \u63d0\u4f9b\u7684\uff0c\u5b83\u662f AOP \u8054\u76df\uff08\u4e00\u4e2a\u5f88\u725b\u903c\u7684\u8054\u76df\uff09\u5199\u7684\uff0cSpring \u53ea\u662f\u501f\u7528\u4e86\u5b83\u3002<\/p>\n
\u5728\u5ba2\u6237\u7aef\u4e2d\u540c\u6837\u4e5f\u9700\u8981\u5c06\u8be5\u589e\u5f3a\u7c7b\u7684\u5bf9\u8c61\u6dfb\u52a0\u5230\u4ee3\u7406\u5de5\u5382\u4e2d\uff1a<\/p>\n
proxyFactory.addAdvice<\/span><\/span>(new\u00a0GreetingAroundAdvice());<\/code><\/pre>\n
\u597d\u4e86\uff0c\u8fd9\u5c31\u662f Spring AOP \u7684\u57fa\u672c\u7528\u6cd5\uff0c\u4f46\u8fd9\u53ea\u662f\u201c\u7f16\u7a0b\u5f0f\u201d\u800c\u5df2\u3002Spring AOP \u5982\u679c\u53ea\u662f\u8fd9\u6837\uff0c\u90a3\u5c31\u592a\u50bb\u903c\u4e86\uff0c\u5b83\u66fe\u7ecf\u4e5f\u662f\u4e00\u5ea6\u5ba3\u4f20\u7528\u00a0Spring \u914d\u7f6e\u6587\u4ef6\u7684\u65b9\u5f0f\u6765\u5b9a\u4e49 Bean \u5bf9\u8c61\uff0c\u628a\u4ee3\u7801\u4e2d\u7684 new \u64cd\u4f5c\u5168\u90e8\u89e3\u8131\u51fa\u6765\u3002<\/p>\n
6. \u00a0\u00a0Spring AOP\uff1a\u524d\u7f6e\u589e\u5f3a\u3001\u540e\u7f6e\u589e\u5f3a\u3001\u73af\u7ed5\u589e\u5f3a\uff08\u58f0\u660e\u5f0f\uff09<\/h2>\n
\u5148\u770b Spring \u914d\u7f6e\u6587\u4ef6\u662f\u5982\u4f55\u5199\u7684\u5427\uff1a<\/p>\n
<?<\/span><\/span><\/span>xml\u00a0version=<\/span>\"1.0\"<\/span><\/span><\/span>\u00a0encoding=<\/span>\"UTF-8\"<\/span><\/span><\/span>?><\/span><\/span><\/span><\/span>\n\n<<\/span>beans<\/span><\/span><\/span>\u00a0<\/span>xmlns<\/span><\/span><\/span>=<\/span>\"http:\/\/www.springframework.org\/schema\/beans\"<\/span><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>xmlns:xsi<\/span><\/span><\/span>=<\/span>\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"<\/span><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>xmlns:context<\/span><\/span><\/span>=<\/span>\"http:\/\/www.springframework.org\/schema\/context\"<\/span><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>xsi:schemaLocation<\/span><\/span><\/span>=<\/span>\"http:\/\/www.springframework.org\/schema\/beans\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0http:\/\/www.springframework.org\/schema\/beans\/spring-beans.xsd\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0http:\/\/www.springframework.org\/schema\/context\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0http:\/\/www.springframework.org\/schema\/context\/spring-context.xsd\"<\/span><\/span><\/span>><\/span><\/span>\n\n\n\n\u00a0\u00a0\u00a0\u00a0<!--\u00a0\u626b\u63cf\u6307\u5b9a\u5305\uff08\u5c06\u00a0@Component\u00a0\u6ce8\u89e3\u7684\u7c7b\u81ea\u52a8\u5b9a\u4e49\u4e3a\u00a0Spring\u00a0Bean\uff09\u00a0--><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0<<\/span>context:component-scan<\/span><\/span><\/span>\u00a0<\/span>base-package<\/span><\/span><\/span>=<\/span>\"aop.demo\"<\/span><\/span><\/span>\/><\/span><\/span>\n\n\n\n\u00a0\u00a0\u00a0\u00a0<!--\u00a0\u914d\u7f6e\u4e00\u4e2a\u4ee3\u7406\u00a0--><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0<<\/span>bean<\/span><\/span><\/span>\u00a0<\/span>id<\/span><\/span><\/span>=<\/span>\"greetingProxy\"<\/span><\/span><\/span>\u00a0<\/span>class<\/span><\/span><\/span>=<\/span>\"org.springframework.aop.framework.ProxyFactoryBean\"<\/span><\/span><\/span>><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>property<\/span><\/span><\/span>\u00a0<\/span>name<\/span><\/span><\/span>=<\/span>\"interfaces\"<\/span><\/span><\/span>\u00a0<\/span>value<\/span><\/span><\/span>=<\/span>\"aop.Greeting\"<\/span><\/span><\/span>\/><\/span><\/span>\u00a0<!--\u00a0\u9700\u8981\u4ee3\u7406\u7684\u63a5\u53e3\u00a0--><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>property<\/span><\/span><\/span>\u00a0<\/span>name<\/span><\/span><\/span>=<\/span>\"target\"<\/span><\/span><\/span>\u00a0<\/span>ref<\/span><\/span><\/span>=<\/span>\"greetingImpl\"<\/span><\/span><\/span>\/><\/span><\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<!--\u00a0\u63a5\u53e3\u5b9e\u73b0\u7c7b\u00a0--><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>property<\/span><\/span><\/span>\u00a0<\/span>name<\/span><\/span><\/span>=<\/span>\"interceptorNames\"<\/span><\/span><\/span>><\/span><\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<!--\u00a0\u62e6\u622a\u5668\u540d\u79f0\uff08\u4e5f\u5c31\u662f\u589e\u5f3a\u7c7b\u540d\u79f0\uff0cSpring\u00a0Bean\u00a0\u7684\u00a0id\uff09\u00a0--><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>list<\/span><\/span><\/span>><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>value<\/span><\/span><\/span>><\/span><\/span>greetingAroundAdvice<\/<\/span>value<\/span><\/span><\/span>><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/<\/span>list<\/span><\/span><\/span>><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/<\/span>property<\/span><\/span><\/span>><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0<\/<\/span>bean<\/span><\/span><\/span>><\/span><\/span>\n\n\n\n<\/<\/span>beans<\/span><\/span><\/span>><\/span><\/span><\/code><\/pre>\n
\u4e00\u5b9a\u8981\u9605\u8bfb\u4ee5\u4e0a\u4ee3\u7801\u7684\u6ce8\u91ca\uff0c\u5176\u5b9e\u4f7f\u7528 ProxyFactoryBean \u5c31\u53ef\u4ee5\u53d6\u4ee3\u524d\u9762\u7684 ProxyFactory\uff0c\u5176\u5b9e\u5b83\u4eec\u4fe9\u5c31\u4e00\u56de\u4e8b\u513f\u3002\u6211\u8ba4\u4e3a\u00a0interceptorNames \u5e94\u8be5\u6539\u540d\u4e3a adviceNames \u6216\u8bb8\u4f1a\u66f4\u5bb9\u6613\u8ba9\u4eba\u7406\u89e3\uff0c\u4e0d\u5c31\u662f\u5f80\u8fd9\u4e2a\u5c5e\u6027\u91cc\u9762\u6dfb\u52a0\u589e\u5f3a\u7c7b\u5417\uff1f<\/p>\n
\u6b64\u5916\uff0c\u5982\u679c\u53ea\u6709\u4e00\u4e2a\u589e\u5f3a\u7c7b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u6765\u7b80\u5316\uff1a<\/p>\n
...\n\n\n\n\u00a0\u00a0\u00a0\u00a0<<\/span>bean<\/span><\/span><\/span>\u00a0<\/span>id<\/span><\/span><\/span>=<\/span>\"greetingProxy\"<\/span><\/span><\/span>\u00a0<\/span>class<\/span><\/span><\/span>=<\/span>\"org.springframework.aop.framework.ProxyFactoryBean\"<\/span><\/span><\/span>><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>property<\/span><\/span><\/span>\u00a0<\/span>name<\/span><\/span><\/span>=<\/span>\"interfaces\"<\/span><\/span><\/span>\u00a0<\/span>value<\/span><\/span><\/span>=<\/span>\"aop.Greeting\"<\/span><\/span><\/span>\/><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>property<\/span><\/span><\/span>\u00a0<\/span>name<\/span><\/span><\/span>=<\/span>\"target\"<\/span><\/span><\/span>\u00a0<\/span>ref<\/span><\/span><\/span>=<\/span>\"greetingImpl\"<\/span><\/span><\/span>\/><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>property<\/span><\/span><\/span>\u00a0<\/span>name<\/span><\/span><\/span>=<\/span>\"interceptorNames\"<\/span><\/span><\/span>\u00a0<\/span>value<\/span><\/span><\/span>=<\/span>\"greetingAroundAdvice\"<\/span><\/span><\/span>\/><\/span><\/span>\u00a0<!--\u00a0\u6ce8\u610f\u8fd9\u884c\u914d\u7f6e\u00a0--><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0<\/<\/span>bean<\/span><\/span><\/span>><\/span><\/span>\n\n\n\n...<\/code><\/pre>\n
\u8fd8\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u91cc\u4f7f\u7528\u4e86 Spring 2.5+ \u7684\u7279\u6027\u201cBean \u626b\u63cf\u201d\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u65e0\u9700\u5728 Spring\u00a0\u914d\u7f6e\u6587\u4ef6\u91cc\u4e0d\u65ad\u5730\u5b9a\u4e49 <bean id=”xxx” class=”xxx”\/> \u4e86\uff0c\u4ece\u800c\u89e3\u8131\u4e86\u6211\u4eec\u7684\u53cc\u624b\u3002<\/p>\n
\u770b\u770b\u8fd9\u662f\u6709\u591a\u4e48\u7684\u7b80\u5355\uff1a<\/p>\n
@Component<\/span><\/span>\n\npublic<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>GreetingImpl<\/span><\/span><\/span>\u00a0<\/span>implements<\/span><\/span><\/span>\u00a0<\/span>Greeting<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0...\n\n}<\/code><\/pre>\n
@Component<\/span><\/span>\n\npublic<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>GreetingAroundAdvice<\/span><\/span><\/span>\u00a0<\/span>implements<\/span><\/span><\/span>\u00a0<\/span>MethodInterceptor<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0...\n\n}<\/code><\/pre>\n
\u6700\u540e\u770b\u770b\u5ba2\u6237\u7aef\u5427\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>Client<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>static<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>main<\/span><\/span><\/span>(String[]\u00a0args)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ApplicationContext\u00a0context\u00a0=\u00a0new<\/span><\/span>\u00a0ClassPathXmlApplicationContext(\"aop\/demo\/spring.xml\"<\/span><\/span>);\u00a0\/\/\u00a0\u83b7\u53d6\u00a0Spring\u00a0Context<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Greeting\u00a0greeting\u00a0=\u00a0(Greeting)\u00a0context.getBean(\"greetingProxy\"<\/span><\/span>);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u4ece\u00a0Context\u00a0\u4e2d\u6839\u636e\u00a0id\u00a0\u83b7\u53d6\u00a0Bean\u00a0\u5bf9\u8c61\uff08\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u4ee3\u7406\uff09<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0greeting.sayHello(\"Jack\"<\/span><\/span>);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\/\/\u00a0\u8c03\u7528\u4ee3\u7406\u7684\u65b9\u6cd5<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u4ee3\u7801\u91cf\u786e\u5b9e\u5c11\u4e86\uff0c\u6211\u4eec\u5c06\u914d\u7f6e\u6027\u7684\u4ee3\u7801\u653e\u5165\u914d\u7f6e\u6587\u4ef6\uff0c\u8fd9\u6837\u4e5f\u6709\u52a9\u4e8e\u540e\u671f\u7ef4\u62a4\u3002\u66f4\u91cd\u8981\u7684\u662f\uff0c\u4ee3\u7801\u53ea\u5173\u6ce8\u4e8e\u4e1a\u52a1\u903b\u8f91\uff0c\u800c\u5c06\u914d\u7f6e\u653e\u5165\u6587\u4ef6\u4e2d\u3002\u8fd9\u662f\u4e00\u6761\u6700\u4f73\u5b9e\u8df5\uff01<\/p>\n
\u9664\u4e86\u4e0a\u9762\u63d0\u5230\u7684\u90a3\u4e09\u7c7b\u589e\u5f3a\u4ee5\u5916\uff0c\u5176\u5b9e\u8fd8\u6709\u4e24\u7c7b\u589e\u5f3a\u4e5f\u9700\u8981\u4e86\u89e3\u4e00\u4e0b\uff0c\u5173\u952e\u7684\u65f6\u5019\u60a8\u8981\u80fd\u60f3\u5f97\u5230\u5b83\u4eec\u624d\u884c\u3002<\/p>\n
7.\u00a0Spring AOP\uff1a\u629b\u51fa\u589e\u5f3a<\/h2>\n
\u7a0b\u5e8f\u62a5\u9519\uff0c\u629b\u51fa\u5f02\u5e38\u4e86\uff0c\u4e00\u822c\u7684\u505a\u6cd5\u662f\u6253\u5370\u5230\u63a7\u5236\u53f0\u6216\u65e5\u5fd7\u6587\u4ef6\u4e2d\uff0c\u8fd9\u6837\u5f88\u591a\u5730\u65b9\u90fd\u5f97\u53bb\u5904\u7406\uff0c\u6709\u6ca1\u6709\u4e00\u4e2a\u4e00\u52b3\u6c38\u9038\u7684\u65b9\u6cd5\u5462\uff1f\u90a3\u5c31\u662f\u00a0Throws Advice\uff08\u629b\u51fa\u589e\u5f3a\uff09<\/strong>\uff0c\u5b83\u786e\u5b9e\u5f88\u5f3a\uff0c\u4e0d\u4fe1\u4f60\u5c31\u7ee7\u7eed\u5f80\u4e0b\u770b\uff1a<\/p>\n
@Component<\/span><\/span>\n\npublic<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>GreetingImpl<\/span><\/span><\/span>\u00a0<\/span>implements<\/span><\/span><\/span>\u00a0<\/span>Greeting<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>sayHello<\/span><\/span><\/span>(String\u00a0name)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out.println(\"Hello!\u00a0\"<\/span><\/span>\u00a0+\u00a0name);\n\n\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0throw<\/span><\/span>\u00a0new<\/span><\/span>\u00a0RuntimeException(\"Error\"<\/span><\/span>);\u00a0\/\/\u00a0\u6545\u610f\u629b\u51fa\u4e00\u4e2a\u5f02\u5e38\uff0c\u770b\u770b\u5f02\u5e38\u4fe1\u606f\u80fd\u5426\u88ab\u62e6\u622a\u5230<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u4e0b\u9762\u662f\u629b\u51fa\u589e\u5f3a\u7c7b\u7684\u4ee3\u7801\uff1a<\/p>\n
@Component<\/span><\/span>\n\npublic\u00a0class\u00a0GreetingThrowAdvice\u00a0implements\u00a0ThrowsAdvice\u00a0{\n\n\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span>\u00a0void<\/span><\/span>\u00a0afterThrowing<\/span><\/span>(Method\u00a0method,\u00a0Object[]\u00a0args,\u00a0Object\u00a0target,\u00a0Exception\u00a0e)\u00a0{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out<\/span><\/span>.println<\/span><\/span>(\"----------\u00a0Throw\u00a0Exception\u00a0----------\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out<\/span><\/span>.println<\/span><\/span>(\"Target\u00a0Class:\u00a0\"<\/span><\/span>\u00a0+\u00a0target.getClass().getName());\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out<\/span><\/span>.println<\/span><\/span>(\"Method\u00a0Name:\u00a0\"<\/span><\/span>\u00a0+\u00a0method.getName());\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out<\/span><\/span>.println<\/span><\/span>(\"Exception\u00a0Message:\u00a0\"<\/span><\/span>\u00a0+\u00a0e.getMessage());\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out<\/span><\/span>.println<\/span><\/span>(\"-------------------------------------\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u629b\u51fa\u589e\u5f3a\u7c7b\u9700\u8981\u5b9e\u73b0\u00a0org.springframework.aop.ThrowsAdvice \u63a5\u53e3\uff0c\u5728\u63a5\u53e3\u65b9\u6cd5\u4e2d\u53ef\u83b7\u53d6\u65b9\u6cd5\u3001\u53c2\u6570\u3001\u76ee\u6807\u5bf9\u8c61\u3001\u5f02\u5e38\u5bf9\u8c61\u7b49\u4fe1\u606f\u3002\u6211\u4eec\u53ef\u4ee5\u628a\u8fd9\u4e9b\u4fe1\u606f\u7edf\u4e00\u5199\u5165\u5230\u65e5\u5fd7\u4e2d\uff0c\u5f53\u7136\u4e5f\u53ef\u4ee5\u6301\u4e45\u5316\u5230\u6570\u636e\u5e93\u4e2d\u3002<\/p>\n
\u8fd9\u4e2a\u529f\u80fd\u786e\u5b9e\u592a\u68d2\u4e86\uff01\u4f46\u8fd8\u6709\u4e00\u4e2a\u66f4\u5389\u5bb3\u7684\u589e\u5f3a\u3002\u5982\u679c\u67d0\u4e2a\u7c7b\u5b9e\u73b0\u4e86 A \u63a5\u53e3\uff0c\u4f46\u6ca1\u6709\u5b9e\u73b0 B \u63a5\u53e3\uff0c\u90a3\u4e48\u8be5\u7c7b\u53ef\u4ee5\u8c03\u7528 B \u63a5\u53e3\u7684\u65b9\u6cd5\u5417\uff1f\u5982\u679c\u60a8\u6ca1\u6709\u770b\u5230\u4e0b\u9762\u7684\u5185\u5bb9\uff0c\u4e00\u5b9a\u4e0d\u6562\u76f8\u4fe1\u539f\u6765\u8fd9\u662f\u53ef\u884c\u7684\uff01<\/p>\n
8. Spring AOP\uff1a\u5f15\u5165\u589e\u5f3a<\/h2>\n
\u4ee5\u4e0a\u63d0\u5230\u7684\u90fd\u662f\u5bf9\u65b9\u6cd5\u7684\u589e\u5f3a\uff0c\u90a3\u80fd\u5426\u5bf9\u7c7b\u8fdb\u884c\u589e\u5f3a\u5462\uff1f\u7528 AOP \u7684\u884c\u8bdd\u6765\u8bb2\uff0c\u5bf9\u65b9\u6cd5\u7684\u589e\u5f3a\u53eb\u505a Weaving\uff08\u7ec7\u5165\uff09<\/strong>\uff0c\u800c\u5bf9\u7c7b\u7684\u589e\u5f3a\u53eb\u505a Introduction\uff08\u5f15\u5165\uff09<\/strong>\u3002\u800c\u00a0Introduction Advice\uff08\u5f15\u5165\u589e\u5f3a\uff09<\/strong>\u5c31\u662f\u5bf9\u7c7b\u7684\u529f\u80fd\u589e\u5f3a\uff0c\u5b83\u4e5f\u662f Spring AOP \u63d0\u4f9b\u7684\u6700\u540e\u4e00\u79cd\u589e\u5f3a\u3002\u5efa\u8bae\u60a8\u4e00\u5f00\u59cb\u5343\u4e07\u4e0d\u8981\u53bb\u770b\u300aSpring Reference\u300b\uff0c\u5426\u5219\u60a8\u4e00\u5b9a\u4f1a\u540e\u6094\u7684\u3002\u56e0\u4e3a\u5f53\u60a8\u770b\u4e86\u4ee5\u4e0b\u7684\u4ee3\u7801\u793a\u4f8b\u540e\uff0c\u4e00\u5b9a\u4f1a\u5f7b\u5e95\u660e\u767d\u4ec0\u4e48\u624d\u662f\u5f15\u5165\u589e\u5f3a\u3002<\/p>\n
\u5b9a\u4e49\u4e86\u4e00\u4e2a\u65b0\u63a5\u53e3 Apology\uff08\u9053\u6b49\uff09\uff1a<\/p>\n
public<\/span><\/span>\u00a0interface<\/span><\/span><\/span>\u00a0<\/span>Apology<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0void<\/span><\/span><\/span>\u00a0<\/span>saySorry<\/span><\/span><\/span>(String\u00a0name)<\/span><\/span><\/span><\/span>;\n\n}<\/code><\/pre>\n
\u4f46\u6211\u4e0d\u60f3\u5728\u4ee3\u7801\u4e2d\u8ba9\u00a0GreetingImpl \u76f4\u63a5\u53bb\u5b9e\u73b0\u8fd9\u4e2a\u63a5\u53e3\uff0c\u6211\u60f3\u5728\u7a0b\u5e8f\u8fd0\u884c\u7684\u65f6\u5019\u52a8\u6001\u5730\u5b9e\u73b0\u5b83\u3002\u56e0\u4e3a\u5047\u5982\u6211\u5b9e\u73b0\u4e86\u8fd9\u4e2a\u63a5\u53e3\uff0c\u90a3\u4e48\u6211\u5c31\u4e00\u5b9a\u8981\u6539\u5199 GreetingImpl \u8fd9\u4e2a\u7c7b\uff0c\u5173\u952e\u662f\u6211\u4e0d\u60f3\u6539\u5b83\uff0c\u6216\u8bb8\u5728\u771f\u5b9e\u573a\u666f\u4e2d\uff0c\u8fd9\u4e2a\u7c7b\u67091\u4e07\u884c\u4ee3\u7801\uff0c\u6211\u5b9e\u5728\u662f\u4e0d\u6562\u52a8\u4e86\u3002\u4e8e\u662f\uff0c\u6211\u9700\u8981\u501f\u52a9 Spring \u7684\u5f15\u5165\u589e\u5f3a\u3002\u8fd9\u4e2a\u6709\u70b9\u610f\u601d\u4e86\uff01<\/p>\n
@Component<\/span><\/span>\n\npublic\u00a0class\u00a0GreetingIntroAdvice\u00a0extends\u00a0DelegatingIntroductionInterceptor\u00a0implements\u00a0Apology\u00a0{\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public\u00a0Object\u00a0invoke(MethodInvocation\u00a0invocation)\u00a0throws\u00a0Throwable\u00a0{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0return\u00a0super.invoke<\/span><\/span>(invocation);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n\n\n\u00a0\u00a0\u00a0\u00a0@Override<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0public\u00a0void\u00a0saySorry(String\u00a0name)\u00a0{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0System.out<\/span><\/span>.println<\/span><\/span>(\"Sorry!\u00a0\"<\/span><\/span>\u00a0+\u00a0name);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u4ee5\u4e0a\u5b9a\u4e49\u4e86\u4e00\u4e2a\u5f15\u5165\u589e\u5f3a\u7c7b\uff0c\u6269\u5c55\u4e86\u00a0org.springframework.aop.support.DelegatingIntroductionInterceptor \u7c7b\uff0c\u540c\u65f6\u4e5f\u5b9e\u73b0\u4e86\u65b0\u5b9a\u4e49\u7684\u00a0Apology \u63a5\u53e3\u3002\u5728\u7c7b\u4e2d\u9996\u5148\u8986\u76d6\u4e86\u7236\u7c7b\u7684 invoke() \u65b9\u6cd5\uff0c\u7136\u540e\u5b9e\u73b0\u4e86 Apology \u63a5\u53e3\u7684\u65b9\u6cd5\u3002\u6211\u5c31\u662f\u60f3\u7528\u8fd9\u4e2a\u589e\u5f3a\u7c7b\u53bb\u4e30\u5bcc\u00a0GreetingImpl \u7c7b\u7684\u529f\u80fd\uff0c\u90a3\u4e48\u8fd9\u4e2a GreetingImpl\u00a0\u7c7b\u65e0\u9700\u76f4\u63a5\u5b9e\u73b0 Apology \u63a5\u53e3\uff0c\u5c31\u53ef\u4ee5\u5728\u7a0b\u5e8f\u8fd0\u884c\u7684\u65f6\u5019\u8c03\u7528\u00a0Apology \u63a5\u53e3\u7684\u65b9\u6cd5\u4e86\u3002\u8fd9\u7b80\u76f4\u662f\u592a\u795e\u5947\u7684\uff01<\/p>\n
\u770b\u770b\u662f\u5982\u4f55\u914d\u7f6e\u7684\u5427\uff1a<\/p>\n
<?<\/span><\/span><\/span>xml\u00a0version=<\/span>\"1.0\"<\/span><\/span><\/span>\u00a0encoding=<\/span>\"UTF-8\"<\/span><\/span><\/span>?><\/span><\/span><\/span><\/span>\n\n<<\/span>beans<\/span><\/span><\/span>\u00a0<\/span>xmlns<\/span><\/span><\/span>=<\/span>\"http:\/\/www.springframework.org\/schema\/beans\"<\/span><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>xmlns:xsi<\/span><\/span><\/span>=<\/span>\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\"<\/span><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>xmlns:context<\/span><\/span><\/span>=<\/span>\"http:\/\/www.springframework.org\/schema\/context\"<\/span><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>xsi:schemaLocation<\/span><\/span><\/span>=<\/span>\"http:\/\/www.springframework.org\/schema\/beans\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0http:\/\/www.springframework.org\/schema\/beans\/spring-beans.xsd\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0http:\/\/www.springframework.org\/schema\/context\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0http:\/\/www.springframework.org\/schema\/context\/spring-context.xsd\"<\/span><\/span><\/span>><\/span><\/span>\n\n\n\n\u00a0\u00a0\u00a0\u00a0<<\/span>context:component-scan<\/span><\/span><\/span>\u00a0<\/span>base-package<\/span><\/span><\/span>=<\/span>\"aop.demo\"<\/span><\/span><\/span>\/><\/span><\/span>\n\n\n\n\u00a0\u00a0\u00a0\u00a0<<\/span>bean<\/span><\/span><\/span>\u00a0<\/span>id<\/span><\/span><\/span>=<\/span>\"greetingProxy\"<\/span><\/span><\/span>\u00a0<\/span>class<\/span><\/span><\/span>=<\/span>\"org.springframework.aop.framework.ProxyFactoryBean\"<\/span><\/span><\/span>><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>property<\/span><\/span><\/span>\u00a0<\/span>name<\/span><\/span><\/span>=<\/span>\"interfaces\"<\/span><\/span><\/span>\u00a0<\/span>value<\/span><\/span><\/span>=<\/span>\"aop.demo.Apology\"<\/span><\/span><\/span>\/><\/span><\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<!--\u00a0\u9700\u8981\u52a8\u6001\u5b9e\u73b0\u7684\u63a5\u53e3\u00a0--><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>property<\/span><\/span><\/span>\u00a0<\/span>name<\/span><\/span><\/span>=<\/span>\"target\"<\/span><\/span><\/span>\u00a0<\/span>ref<\/span><\/span><\/span>=<\/span>\"greetingImpl\"<\/span><\/span><\/span>\/><\/span><\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<!--\u00a0\u76ee\u6807\u7c7b\u00a0--><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>property<\/span><\/span><\/span>\u00a0<\/span>name<\/span><\/span><\/span>=<\/span>\"interceptorNames\"<\/span><\/span><\/span>\u00a0<\/span>value<\/span><\/span><\/span>=<\/span>\"greetingIntroAdvice\"<\/span><\/span><\/span>\/><\/span><\/span>\u00a0<!--\u00a0\u5f15\u5165\u589e\u5f3a\u00a0--><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<<\/span>property<\/span><\/span><\/span>\u00a0<\/span>name<\/span><\/span><\/span>=<\/span>\"proxyTargetClass\"<\/span><\/span><\/span>\u00a0<\/span>value<\/span><\/span><\/span>=<\/span>\"true\"<\/span><\/span><\/span>\/><\/span><\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<!--\u00a0\u4ee3\u7406\u76ee\u6807\u7c7b\uff08\u9ed8\u8ba4\u4e3a\u00a0false\uff0c\u4ee3\u7406\u63a5\u53e3\uff09\u00a0--><\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0<\/<\/span>bean<\/span><\/span><\/span>><\/span><\/span>\n\n\n\n<\/<\/span>beans<\/span><\/span><\/span>><\/span><\/span><\/code><\/pre>\n
\u9700\u8981\u6ce8\u610f\u00a0proxyTargetClass \u5c5e\u6027\uff0c\u5b83\u8868\u660e\u662f\u5426\u4ee3\u7406\u76ee\u6807\u7c7b\uff0c\u9ed8\u8ba4\u4e3a false\uff0c\u4e5f\u5c31\u662f\u4ee3\u7406\u63a5\u53e3\u4e86\uff0c\u6b64\u65f6\u00a0Spring \u5c31\u7528 JDK \u52a8\u6001\u4ee3\u7406\u3002\u5982\u679c\u4e3a true\uff0c\u90a3\u4e48 Spring \u5c31\u7528 CGLib \u52a8\u6001\u4ee3\u7406\u3002\u8fd9\u7b80\u76f4\u5c31\u662f\u592a\u65b9\u4fbf\u4e86\uff01Spring \u5c01\u88c5\u4e86\u8fd9\u4e00\u5207\uff0c\u8ba9\u7a0b\u5e8f\u5458\u4e0d\u5728\u5173\u5fc3\u90a3\u4e48\u591a\u7684\u7ec6\u8282\u3002\u6211\u4eec\u8981\u5411\u8001\u7f57\u540c\u5fd7\u81f4\u656c\uff0c\u60a8\u662f\u6211\u4eec\u5fc3\u4e2d\u6c38\u8fdc\u7684 idol\uff01<\/p>\n
\u5f53\u60a8\u770b\u5b8c\u4e0b\u9762\u7684\u5ba2\u6237\u7aef\u4ee3\u7801\uff0c\u4e00\u5b9a\u4f1a\u5b8c\u5168\u660e\u767d\u4ee5\u4e0a\u7684\u8fd9\u4e00\u5207\uff1a<\/p>\n
public<\/span><\/span>\u00a0class<\/span><\/span><\/span>\u00a0<\/span>Client<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\n\n\u00a0\u00a0\u00a0\u00a0public<\/span><\/span><\/span>\u00a0<\/span>static<\/span><\/span><\/span>\u00a0<\/span>void<\/span><\/span><\/span>\u00a0<\/span>main<\/span><\/span><\/span>(String[]\u00a0args)<\/span><\/span><\/span>\u00a0<\/span><\/span>{\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ApplicationContext\u00a0context\u00a0=\u00a0new<\/span><\/span>\u00a0ClassPathXmlApplicationContext(\"aop\/demo\/spring.xml\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0GreetingImpl\u00a0greetingImpl\u00a0=\u00a0(GreetingImpl)\u00a0context.getBean(\"greetingProxy\"<\/span><\/span>);\u00a0\/\/\u00a0\u6ce8\u610f\uff1a\u8f6c\u578b\u4e3a\u76ee\u6807\u7c7b\uff0c\u800c\u5e76\u975e\u5b83\u7684\u00a0Greeting\u00a0\u63a5\u53e3<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0greetingImpl.sayHello(\"Jack\"<\/span><\/span>);\n\n\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Apology\u00a0apology\u00a0=\u00a0(Apology)\u00a0greetingImpl;\u00a0\/\/\u00a0\u5c06\u76ee\u6807\u7c7b\u5f3a\u5236\u5411\u4e0a\u8f6c\u578b\u4e3a\u00a0Apology\u00a0\u63a5\u53e3\uff08\u8fd9\u662f\u5f15\u5165\u589e\u5f3a\u7ed9\u6211\u4eec\u5e26\u6765\u7684\u7279\u6027\uff0c\u4e5f\u5c31\u662f\u201c\u63a5\u53e3\u52a8\u6001\u5b9e\u73b0\u201d\u529f\u80fd\uff09<\/span><\/span>\n\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0apology.saySorry(\"Jack\"<\/span><\/span>);\n\n\u00a0\u00a0\u00a0\u00a0}\n\n}<\/code><\/pre>\n
\u6ca1\u60f3\u5230 saySorry() \u65b9\u6cd5\u539f\u6765\u662f\u53ef\u4ee5\u88ab greetingImpl \u5bf9\u8c61\u6765\u76f4\u63a5\u8c03\u7528\u7684\uff0c\u53ea\u9700\u5c06\u5176\u5f3a\u5236\u8f6c\u6362\u4e3a\u8be5\u63a5\u53e3\u5373\u53ef\u3002<\/p>\n
\u6211\u4eec\u518d\u6b21\u611f\u8c22 Spring AOP\uff0c\u611f\u8c22\u8001\u7f57\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e86\u8fd9\u4e48\u5f3a\u5927\u7684\u7279\u6027\uff01<\/p>\n
\u5176\u5b9e\uff0cSpring AOP \u8fd8\u6709\u5f88\u591a\u7cbe\u5f69\u7684\u5730\u65b9\uff0c\u4e0b\u4e00\u7bc7\u5c06\u4ecb\u7ecd\u66f4\u591a\u66f4\u6709\u4ef7\u503c\u7684 AOP \u6280\u672f\uff0c\u8ba9\u5927\u5bb6\u5f97\u5230\u66f4\u591a\u7684\u6536\u83b7\u3002<\/p>\n
\u672a\u5b8c\uff0c<\/strong>\u5f85\u7eed…<\/strong><\/p>\n
AOP \u90a3\u70b9\u4e8b\u513f[\u7eed]<\/a><\/h3>\n
\n
\u4e00\u53e5\u8bdd\u603b\u7ed3\uff1aAOP \u7528\u6a2a\u5207\u628a\u589e\u5f3a\u4ece\u4e1a\u52a1\u4ee3\u7801\u91cc\u62c6\u51fa\u53bb\uff0cSpring \u5219\u628a JDK\/CGLib \u4ee3\u7406\u5c01\u88c5\u6210\u524d\u7f6e\u3001\u540e\u7f6e\u3001\u73af\u7ed5\u3001\u629b\u51fa\u548c\u5f15\u5165\u589e\u5f3a\u3002<\/strong><\/p>\n<\/blockquote>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
AOP\uff08\u9762\u5411\u5207\u9762\u7f16\u7a0b\uff09\u662f\u5bf9 OOP \u7684\u8865\u5145\u800c\u4e0d\u662f\u66ff\u4ee3\uff1a\u628a\u65e5\u5fd7\u3001\u4e8b\u52a1\u3001\u9274\u6743\u8fd9\u7c7b\u6a2a\u5207\u903b\u8f91\u4ece\u4e1a\u52a1\u65b9\u6cd5\u91cc\u62bd\u51fa\u53bb\uff0c\u7528\u4e00\u628a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[91],"tags":[101,184],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2183"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2183"}],"version-history":[{"count":2,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2183\/revisions"}],"predecessor-version":[{"id":2190,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2183\/revisions\/2190"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}