后置通知和前置通知差不多。最大的特点是因为后置通知是运行在目标方法之后的,所以他可以拿到目标方法的运行的结果。

给出案例:

案例结构图:

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" alt="" />

其实和上一篇的前置通知差不多,这里每个类就不做具体解释了。

第一步:

编写目标类:

package cn.itcast.spring.d_aspectj;

//目标业务类
public class CustomerService { public int delete() {
System.out.println("this is delete");
return 1;
} }

第二步:

编写切面类

//切面类(内部可以写很多的Advice的方法)
public class MyAspect { //可以传两个参数,后置通知相比前置通知来时
//一个特点是,因为后置通知是运行在目标方法之后的,所以他可以拿到目标方法的运行的结果
public void afterReturning(JoinPoint joinPoint,Object result)
{
System.out.print("后置通知的运行"+result); } }

第三步:编写Spring配置文件

<!-- AspectJ AOP -->
<!-- 配置目标 -->
<bean id="CustomerService" class="cn.itcast.spring.d_aspectj.CustomerService"></bean>
<!-- 配置切面类 -->
<bean id="MyAspect" class="cn.itcast.spring.d_aspectj.MyAspect"></bean>
<aop:config>
<!-- ref引用切面类 -->
<aop:aspect ref="MyAspect"> <aop:pointcut expression="execution(* cn.itcast.spring.d_aspectj.CustomerService.*(..))" id="mypointcut2"/> <!-- 这个参数是配置返回的 必须和public void afterReturning(JoinPoint joinPoint,Object result)这个方法里面的 result一字不差-->
<aop:after-returning method="afterReturning" returning="result" pointcut-ref="mypointcut2" />
</aop:aspect>

第三步:编写测试类

    @Test
public void testafter()
{System.out.print(customerService.getClass().getName());
customerService.delete(); }

输出结果:

this is delete
后置通知的运行1

看到没  !返回了目标函数的执行结果。

05-08 15:49