package 动态代理2;

//需要对这个类进行增强

public class UserService {

    public void create()

    {

        System.out.println("创建用户");

    }

    public  void update()

    {

        System.out.println("更新用户");

    }

}

 package 动态代理2;

 import java.lang.reflect.Method;

 import net.sf.cglib.proxy.Enhancer;

 import net.sf.cglib.proxy.MethodInterceptor;

 import net.sf.cglib.proxy.MethodProxy;

 public class ProxyCglib implements MethodInterceptor{

     //根据传入的名字来判断是否有操作权限

     private Enhancer enhancer=new Enhancer();

     private String name=null;

     public ProxyCglib(String name)

     {

         this.name=name;

     }

     //获得代理类的对象，传入参数为委托类

     public Object getProxy(Class clazz){

           //设置需要创建子类的类

           enhancer.setSuperclass(clazz);

           enhancer.setCallback(this);

           //通过字节码技术动态创建子类实例

           return enhancer.create();

          }

     public Object intercept(Object arg0, Method arg1, Object[] arg2,

             MethodProxy arg3) throws Throwable {

         // TODO Auto-generated method stub

         if(!name.equals("han"))

         {

          System.out.println("权限不足");

         }

         else

         {

             arg3.invokeSuper(arg0, arg2);

         }

         return null;

     }

 }

package 动态代理2;

//ref: http://songbo-mail-126-com.iteye.com/blog/968792

public class Test {

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        //为用户张三创建一个代理对象

    /*

        ProxyCglib proxy=new ProxyCglib("张三");

        UserService user=(UserService) proxy.getProxy(UserService.class);

        user.create(); */

        ProxyCglib proxy2=new ProxyCglib("han");

        UserService user2 =(UserService) proxy2.getProxy(UserService.class);

        user2.create();

    }

}