cglib实现动态代理

使用字节码生成库（CGlib）实现动态代理。

1.导入cglib.jar和asm.jar包

2.创建UserService接口和实现类UserServiceImpl

3.创建代理类并实现MethodInterceptor接口

package com.spring.AOPTest;

import java.lang.reflect.Method;

import net.sf.cglib.proxy.Enhancer;

import net.sf.cglib.proxy.MethodInterceptor;

import net.sf.cglib.proxy.MethodProxy;

//使用CGlib（字节码生成库）实现动态代理

public class CGProxy implements MethodInterceptor{

private Object target;//被代理对象

public CGProxy(Object target) {
	// TODO Auto-generated constructor stub
	this.target = target;
}
@Override
public Object intercept(Object arg0, Method arg1, Object[] arg2, MethodProxy proxy) throws Throwable {
	// TODO Auto-generated method stub
	System.out.println("before advisor......");
	Object result = proxy.invokeSuper(arg0, arg2);
	System.out.println("after advisor......");
	
	return result;
}

public Object getProxyObject() {
	Enhancer enHancer = new Enhancer();
	enHancer.setSuperclass(this.target.getClass());//设置父类
	//设置回调
	enHancer.setCallback(this);
	//创建代理对象
	return enHancer.create();
}
           

}

4.编写测试类

package com.spring.AOPTest;

import org.junit.Test;

public class GCProxyTest {

@Test
public void testGCLib() {
	
	Object proxyObject = new UserServiceImpl();
	CGProxy cg = new CGProxy(proxyObject);
	UserService us = (UserService)cg.getProxyObject();
	us.createUser();
}
           

}

结果如下：

before advisor…

添加一个新的用户

after advisor…