Java 动态代理

America.java

package com.myproject.proxy;

public interface America {
	public String speakEnglish();
}

Chinese.java

package com.myproject.proxy;

public interface Chinese {

	public String speakChinese();

}

Hybrid.java

package com.myproject.proxy;

public class Hybrid implements Chinese, America{

	public String speakEnglish() {

		return "I'm speaking Chinese";
	}

	public String speakChinese() {

		return "I'm speaking English";
	}
}

MyInvocationHandler.java

package com.myproject.proxy;

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

public class MyInvocationHandler implements InvocationHandler{

	private Object obj;

	public MyInvocationHandler(Object object){
		this.obj = object;
	}

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

		return method.invoke(obj, args);
	}

}

Teacher.java

package com.myproject.proxy;

import java.lang.reflect.InvocationHandler;

import java.lang.reflect.Proxy;

public class Teacher {

	public static void main(String[] args){

		Hybrid hybrid = new Hybrid();

		InvocationHandler handler = new MyInvocationHandler(hybrid);

		Chinese chinese = (Chinese)Proxy.newProxyInstance(Chinese.class.getClassLoader(), new Class[]{Chinese.class}, handler);

		System.out.println(chinese.speakChinese());


		America america = (America)Proxy.newProxyInstance(hybrid.getClass().getClassLoader(), (Class[])(hybrid.getClass().getInterfaces()), handler);

		System.out.println(america.speakEnglish());
	}

}

output:
I'm speaking English
I'm speaking Chinese