java中方法加强的3中方法

package com.gyarmy.datesource;

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

import org.junit.Test;

public class TestData1 {
	
	@Test
	public void test1(){
		System.out.println("test1");
		
		//继承
		Cat car1 = new Cat(){
			@Override
			public void run(){
				
				System.out.println("cat 100");
				super.run();
			}
		};
		car1.run();
		
		//装饰设计模式
	}
	
	@Test
	public void test2(){
		DecractorCat dCat = new DecractorCat(new Cat());
		dCat.run();
		
	}
	
	
	@Test
	public void test3(){
		
		final ICat cat = new Cat();
		
		ICat proxyCat  = (ICat)Proxy.newProxyInstance(Cat.class.getClassLoader(), cat.getClass().getInterfaces(), new InvocationHandler() {
			
			@Override
			public Object invoke(Object proxy, Method method, Object[] args)
					throws Throwable {
				// TODO Auto-generated method stub
				
				//System.out.println("www.gyarmy.com");
				if(method.getName().equalsIgnoreCase("run")){
					System.out.println("折耳猫 跑步");
				}
				
				if(method.getName().equalsIgnoreCase("eat")){
					System.out.println("折耳猫 吃饭");
					
					//调用底层方法
					return method.invoke(cat, args);
					
				}
				//调用原有的方法
				return method.invoke(cat, args);
			}
		});
		
		
		proxyCat.eat();
		System.out.println(proxyCat.hashCode());
		
		
		
	}
	
	
	
	
	
}

class DecractorCat implements ICat{
	private ICat cat;
	public DecractorCat(ICat cat){
		this.cat = cat;
	}
	@Override
	public void run() {
		// TODO Auto-generated method stub
		//方法加强
		System.out.println("加菲猫 跑步");
		cat.run();
	}
	@Override
	public void eat() {
		// TODO Auto-generated method stub
		System.out.println("加菲猫 吃饭");
		cat.run();
	}
}

class Cat implements ICat{
	public void run(){
		System.out.println("猫跑步");
	}
	
	public void eat(){
		System.out.println("猫 吃饭");
	}
}

interface ICat{
	public void run();
	public void eat();
}