复习笔记：一个简单的动态代理实现

interface Eat{
    void eat() ;
}
class RealEat implements Eat{
    public void eat(){
        System.out.println("###真实主题的核心操作###");
    }
}
class EatProxy implements InvocationHandler{
    private Eat eat ;
    public Eat bind(Eat eat){
        this.eat = eat ;
        return (Eat)Proxy.newProxyInstance(eat.getClass().getClassLoader(), eat.getClass().getInterfaces(), this);
    }
    public Object invoke(Object obj,Method method,Object[] args) throws Throwable{
        this.prepare();
        Object obj1 = method.invoke(this.eat, args);
        this.finish();
        return obj1 ;
    }
    private void prepare(){
        System.out.println("代理的准备工作");
    }
    private void finish(){
        System.out.println("代理的收尾工作");
    }
}
public class Test{
    public static void main(String[] args){
        EatProxy proxy = new EatProxy() ;
        Eat eat = proxy.bind(new RealEat()) ;
        eat.eat();
    }
}

运行结果：

代理的准备工作
###真实主题的核心操作###
代理的收尾工作