代理对象

public class UserDaoProxy{
	private Object obj;

	public UserDaoProxy(Object obj) {
		super();
		this.obj = obj;
	}

	//给目标对象，生成代理对象
	public Object getProxyInstance(){
		return Proxy.newProxyInstance(
				obj.getClass().getClassLoader(),
				obj.getClass().getInterfaces(),
				new InvocationHandler() {

					public Object invoke(Object proxy, Method method, Object[] args)
							throws Throwable {
						System.out.println("开启事务。。。");
						//执行目标对象方法
						Object o=method.invoke(obj, args);
						System.out.println("提交事务。。。。");
						return o;
					}
				});
	}
}