dynamic proxy 小例

 

package org.hibernate.tutorial.util;

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

public class ListHandler implements InvocationHandler {
	
	public List str;

	public List bind(List str2) {
		this.str = str2;
		List proxyStr = (List)Proxy.newProxyInstance(str2.getClass().getClassLoader(),
				str2.getClass().getInterfaces(), this);
		return proxyStr;
	} 
	@Override
	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		Object obj = null;
		if ("toString".equals(method.getName())) {
			System.out.println("entry youself code here");
		} else {
			obj = method.invoke(str, args);
		}
		return obj;
	}
}

 package org.hibernate.tutorial.util;

import java.util.ArrayList;
import java.util.List;

public class TestDynamicProxy {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		ListHandler sh = new ListHandler();
		List proxyStr = sh.bind(new ArrayList());
		proxyStr.toString();
	}

}