CglibProxy

package com.albert.spring.proxy;

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 CglibProxy implements MethodInterceptor
{

    private Object target;

    public Object createUserDaoImp2(Object target)
    {
        this.target = target;
        Enhancer enhancer = new Enhancer();
        enhancer.setSuperclass(this.target.getClass());
        /***
         * cglib创建的代理对象，其实就是继承了要代理的目标类， 然后对目标类中所有非final方法进行覆盖，但在覆盖方法时会添加一些拦截代码
         */
        enhancer.setCallback(this); // 注册回调器
        return enhancer.create();
    }

    public Object intercept(Object proxy, Method method, Object[] args, MethodProxy methodProxy)
        throws Throwable
    {
        StudentDaoImpl udi = (StudentDaoImpl)target;
        Object result = null;
        if (udi.getName() != null)
        {
            // 前置通知
            try
            {
                result = methodProxy.invoke(target, args);
                // 后置通知
            }
            catch (Exception e)
            {
                e.printStackTrace();
                // 例外通知
            }
            finally
            {
                // 最终通知
            }
        }
        return result;
    }

    public static void main(String[] agrs)
    {
        CglibProxy cglibProxy=new CglibProxy();
        StudentDaoImpl st=  (StudentDaoImpl)cglibProxy.createUserDaoImp2(new StudentDaoImpl("test"));
         st.addStudent();
    }
}