项目开发中需要用到aop实现员工操作记录，但是写完之后代码中原来的监听类里的方法变成了null 找了好久，大概明白了原因。 代码如下： 写一个切面类
自己定义了一个注解。然后想将注解写在controller层时 之前写的获取注解信息报出了null 我对比了2个执行流程发现原来是代理类错了 错误时候的代理类是 而正常的执行的类是 解决办法，使用工具判斷在执行的时候调用原来的代理类就行了
package zy.latte.common.util; import org.springframework.aop.framework.AdvisedSupport; import org.springframework.aop.framework.AopProxy; import org.springframework.aop.support.AopUtils; import java.lang.reflect.Field; /** * @ClassName AopTargetUtils * @Author yupanpan * @Date 2019/12/27 13:48 */ public class AopTargetUtils { /** * 获取 目标对象 * * @param proxy 代理对象 * @return 目标对象 * @throws Exception */ public static Object getTarget(Object proxy) throws Exception { if (!AopUtils.isAopProxy(proxy)) { return proxy; } //判断是jdk还是cglib代理 if (AopUtils.isJdkDynamicProxy(proxy)) { proxy = getJdkDynamicProxyTargetObject(proxy); } else { proxy = getCglibProxyTargetObject(proxy); } return getTarget(proxy); } private static 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; } private static 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; } }切换一下代理类就可以正常执行了。
参考：https://blog.csdn.net/ypp91zr/article/details/103730870?utm_medium=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.channel_param&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.channel_param
