标签：throwable ade *** get targe http nts rda target
小贴士：以下内容纯属个人观点，如有不当请指出并谅解
import java.lang.reflect.Proxy;
Proxy可以动态代理一个对象
写一个代理工厂类ProxyFactory：
package com.zhangpn.serviceImpl; import java.lang.reflect.InvocationHandler; import java.lang.reflect.Method; import java.lang.reflect.Proxy; public class ProxyFactory implements InvocationHandler { private Object target;//这是被动态代理的对象 public Object createProxyIntance(Object target) {//通过调用此方法,将被代理目标传入并且返回代理对象,在此invoke方法会被回调 this.target = target; return Proxy.newProxyInstance(this.target.getClass().getClassLoader(), this.target.getClass().getInterfaces(), this); } @Override public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { System.out.println("******调用动态被代理对象之前做相关处理******"); method.invoke(target, args); System.out.println("------调用动态被代理对象之后做相关处理------\n"); return null; } }
写两个被代理类：
第一个User：
package com.zhangpn.daoImpl;
import com.zhangpn.dao.UserDao;
public class UserDaoImpl implements UserDao {
public void save() {
System.out.println("UserDaoImpl save success!");
}
}
其实现的接口：
package com.zhangpn.dao;
public interface UserDao {
public void save();
}
第二个Student：
package com.zhangpn.daoImpl;
import com.zhangpn.dao.StudentDao;
public class StudentDaoImpl implements StudentDao {
public void save() {
System.out.println("StrudentDaoImpl save success!");
}
}
其实现的接口：
package com.zhangpn.dao;
public interface StudentDao {
public void save();
}
测试运行：
package com.zhangpn.Test;
import com.zhangpn.dao.StudentDao;
import com.zhangpn.dao.UserDao;
import com.zhangpn.daoImpl.StudentDaoImpl;
import com.zhangpn.daoImpl.UserDaoImpl;
import com.zhangpn.serviceImpl.ProxyFactory;
public class Test {
public static void main(String[] args) {
ProxyFactory factory = new ProxyFactory();
UserDao userDao = (UserDao) factory.createProxyIntance(new UserDaoImpl());
userDao.save();
StudentDao studentDao = (StudentDao) factory.createProxyIntance(new StudentDaoImpl());
studentDao.save();
}
}
Spring中AOP：Proxy动态代理浅解析（被代理对象必须实现接口）
标签：throwable ade *** get targe http nts rda target
原文地址：https://www.cnblogs.com/batj/p/9129648.html
