动态代理简单测试

1\被代理类

package com.gyarmy.proxy;

public class Liyuchun implements Person {

	@Override
	public String sing(String name) {
		// TODO Auto-generated method stub
		System.out.println("李宇春 唱歌..."+name);
		return "sing over";
	}

	@Override
	public String dance(String name) {
		// TODO Auto-generated method stub
		System.out.println("李宇春 跳舞.."+name);
		return "dance over";
	}

}

2\代理类

package com.gyarmy.proxy;

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

public class ProxyLiyuchun {
	
	private Liyuchun chunchun = new Liyuchun();
	
	public Object getProxy()
	{
		//设计代理类
		Person proxyChunchun = (Person)Proxy.newProxyInstance(ProxyLiyuchun.class.getClassLoader(), Liyuchun.class.getInterfaces(), new InvocationHandler() {
			
			@Override
			public Object invoke(Object proxy, Method method, Object[] args)
					throws Throwable {
				if(method.getName().equals("sing")){	
					//说明调用的是 sing 方法, 现在是向 让 chunchun 去唱歌了 
					// 让真实的 chunchun 去唱歌 
					System.out.println("拿 1 万 刀 来 ....");
					return method.invoke(chunchun, args);   // chunchun.sing();
				}else if(method.getName().equals("dance")){
					
					System.out.println("拿两万刀 来 ...");
					return method.invoke(chunchun, args);   // chunchun.dance();
				}else{
					
					System.out.println("春哥没这个服务...");
					return null;
				}
			}
		});
		
		return proxyChunchun;
	}
	
}

3\测试使用

package com.gyarmy.proxy;

import org.junit.Test;

public class demoProxy {
	
	@Test
	public void test1()
	{
		ProxyLiyuchun p = new ProxyLiyuchun();
		Person li = (Person)p.getProxy();
		String sing = li.sing("多多");
		System.out.println(sing);
		String dance = li.dance("fuck");
		System.out.println(dance);
		//li.hashCode();
		
		
	}
}