通过代理类对象获取原生类的工具类。
因为有时候代理类上面没有一些原生类的信息,比如注解等,需要先获取到原始的类,再去获取注解。
所以找到一个工具类方法,记录一下
package com.shinedata.util.aop;
import org.springframework.aop.framework.AdvisedSupport;
import org.springframework.aop.framework.AopProxy;
import org.springframework.aop.support.AopUtils;
import java.lang.reflect.Field;
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;
}
}