jdk动态代理

 

主要是实现InvocationHandler接口。

 

看一个例子：

 

package com.xygy.mianshi.testdynamicproxy;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

public class TestDynamicProxy implements InvocationHandler {

	public Object target;
	
	public TestDynamicProxy(Object target){
		this.target=target;
	}
	
	@Override
	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		System.out.println("before");
		Object result=method.invoke(target, args);
		System.out.println("after");
		return result;
	}
	
	
	public Object getProxy(){
		return Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(), 
				target.getClass().getInterfaces(), this);
	}
	
	public static void main(String[] args) {
		
		ICircus ic=new CircusImpl();
		TestDynamicProxy tdp=new TestDynamicProxy(ic);
		
		ICircus proxy=(ICircus) tdp.getProxy();
		proxy.playMonkey();
		
		
	}
	
}

 

接口源码：

 

package com.xygy.mianshi.testdynamicproxy;

public interface ICircus {
	public void playMonkey();
}

 

 

实现类源码：

package com.xygy.mianshi.testdynamicproxy;

public class CircusImpl implements ICircus {

	@Override
	public void playMonkey() {
		System.out.println("耍猴子");
	}

}

 

 

refurl:http://rejoy.iteye.com/blog/1627405