动态代理

package com.wangyu01;

public interface Subject {
	public void request();
}

package com.wangyu01;

public class RealSubject implements Subject {

	public void request() {
		System.out.println("真实实现--》关注做菜");
	}
}

package com.wangyu01;

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

public class ProxyHandle implements InvocationHandler {
	private Object obj = null;

	public Object bind(Object obj) {
		this.obj = obj;
		return Proxy.newProxyInstance(obj.getClass().getClassLoader(), obj
				.getClass().getInterfaces(), this);
	}

	public Object invoke(Object arg0, Method method, Object[] arg2)
			throws Throwable {
		System.out.println("代理开始之前");
		Object o =method.invoke(this.obj, arg2);
		System.out.println("代理开始之后");
		return o;
	}
}

package com.wangyu01;

public class TestProxy {

	public static void main(String[] args) {
		ProxyHandle ph = new ProxyHandle();
		Subject sub = (Subject)ph.bind(new RealSubject());
		sub.request();

	}

}