Spring Aop中，获取被代理类的工具

在实际应用中，顺着过去就是一个类被代理。反过来，可能需要逆向进行，拿到被代理的类，实际工作中碰到了，就拿出来分享下。

 /**
      * 获取被代理类的Object
      * @author Monkey
      */
     public Object getTarget(Object proxy) throws Exception {  

         if(!AopUtils.isAopProxy(proxy)) {
             //不是代理对象
             return proxy;
         }  

         if(AopUtils.isJdkDynamicProxy(proxy)) {
             return getJdkDynamicProxyTargetObject(proxy);
         } else { //cglib
             return getCglibProxyTargetObject(proxy);
         }
     }  

 /**
      * CGLIB方式被代理类的获取
      * @author Monkey
      *
      */
     private Object getCglibProxyTargetObject(Object proxy) throws Exception {
         Field h = proxy.getClass().getDeclaredField("CGLIB$CALLBACK_0");
         h.setAccessible(true);
         Object dynamicAdvisedInterceptor = h.get(proxy);
         Field advised = dynamicAdvisedInterceptor.getClass().getDeclaredField("advised");
         advised.setAccessible(true);
         Object target = ((AdvisedSupport)advised.get(dynamicAdvisedInterceptor)).getTargetSource().getTarget();
         return target;
     }  

 /**
      * JDK动态代理方式被代理类的获取
      * @author Monkey
      *
      */
     private Object getJdkDynamicProxyTargetObject(Object proxy) throws Exception {
         Field h = proxy.getClass().getSuperclass().getDeclaredField("h");
         h.setAccessible(true);
         AopProxy aopProxy = (AopProxy) h.get(proxy);
         Field advised = aopProxy.getClass().getDeclaredField("advised");
         advised.setAccessible(true);
         Object target = ((AdvisedSupport)advised.get(aopProxy)).getTargetSource().getTarget();
         return target;
     }