java使用动态代理来实现AOP.docx

java使用动态代理来实现AOPjava使用动态代理来实现AOP下面是一个AOP实现的简单例子：首先定义一些业务方法：复制代码代码如下:/***CreatedwithIntelliJIDEA.*Author:wangjieemail:[e-mail]*Date:13-9-23*Time:下午3:49*/publicinterfaceBussinessService{publicStringlogin(Stringusername,Stringpassword);publicStringfind();}publicclassBussinessServiceImplimplementsBussinessService{privateLoggerlogger=Logger.getLogger(this.getClass().getSimpleName());@OverridepublicStringlogin(Stringusername,Stringpassword){return"loginsuccess";}@OverridepublicStringfind(){return"findsuccess";}}复制代码代码如下:/***CreatedwithIntelliJIDEA.*Author:wangjieemail:[e-mail]*Date:13-9-24*Time:上午10:27*/publicinterfaceWorkService{publicStringwork();publicStringsleep();}publicclassWorkServiceImplimplementsWorkService{@OverridepublicStringwork(){return"worksuccess";}@OverridepublicStringsleep(){return"sleepsuccess";}}实现InvocationHandler接口，使用map来存储不同的InvocationHandler对象，避免生成过多。复制代码代码如下:packagecom.wangjie.aoptest2.invohandler;importjava.lang.reflect.InvocationHandler;importjava.lang.reflect.Method;importjava.lang.reflect.Proxy;importjava.util.Arrays;importjava.util.HashMap;importjava.util.logging.Logger;/***CreatedwithIntelliJIDEA.*Author:wangjieemail:[e-mail]*Date:13-9-23*Time:下午3:47*/publicclassLogInvoHandlerimplementsInvocationHandler{privateLoggerlogger=Logger.getLogger(this.getClass().getSimpleName());privateObjecttarget;//代理目标privateObjectproxy;//代理对象privatestaticHashMap<Class,LogInvoHandler>();privateLogInvoHandler(){}/***通过Class来生成动态代理对象Proxy*@paramclazz*@return*/publicsynchronizedstaticTgetProxyInstance(Classclazz){LogInvoHandlerinvoHandler=invoHandlers.get(clazz);if(null==invoHandler){invoHandler=newLogInvoHandler();try{Ttar=clazz.newInstance();invoHandler.setTarget(tar);invoHandler.setProxy(Proxy.newProxyInstance(tar.getClass().getClassLoader(),tar.getClass().getInterfaces(),invoHandler));}catch(Exceptione){e.printStackTrace();}invoHandlers.put(clazz,invoHandler);}re