动态代理的例子

package com.youyj.proxy;

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

/**
* 代理类
* @author Administrator
*
*/

class DynamicObj implements InvocationHandler
{

private Object realObj;

public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable
{

return method.invoke(realObj, args);
}

public Object getRealObj()
{
return realObj;
}

public void setRealObj(Object realObj)
{
this.realObj = realObj;
}

}

/**
* 目标对象的接口
* @author Administrator
*
*/

interface Car
{
public void start(String type);

public void stop();
}

/**
* 目标对象1
* @author Administrator
*
*/
class Ford implements Car
{

@Override
public void start(String type)
{

System.out.println(type + " 汽车启动了...");
}

@Override
public void stop()
{
System.out.println("Ford 汽车停止了。。。");

}

}

/**
* 目标对象2
* @author Administrator
*
*/
class Benz implements Car
{

@Override
public void start(String type)
{

System.out.println("Benz 汽车启动了...");
}

@Override
public void stop()
{
System.out.println("Benz 汽车停止了。。。");

}

}

public class DynamicProxy
{

/**
* @param args
*/
public static void main(String[] args)
{
DynamicObj dyo = new DynamicObj();
dyo.setRealObj(new Ford());
Car car = (Car) Proxy.newProxyInstance(Car.class.getClassLoader(),
new Class[] { Car.class },
dyo);
car.start("Ford");
}

}