2018-07-06 Spring的AOP入门案例出错

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop 
        http://www.springframework.org/schema/aop/spring-aop.xsd"> 
<!-- 配置目标对象 -->
<bean id="productDao" class="com.ryan.spring_aop.ProductDaoImpl"/>
<!-- 将切面交给Spring管理 -->
<bean id="myAspectPri" class="com.ryan.spring_aop.MyAspectPri"/>
<!-- 通过AOP配置完成代理 -->
<aop:config>
   <!-- 表达式配置哪些类的哪些方法需要增强 -->
   <aop:pointcut expression="execution(*com.ryan.spring_aop.ProductDaoImpl.save(..))" id="pointcut1"/>
   <!-- 配置切面 -->
    <aop:aspect ref="myAspectPri" >
       <aop:before method="checkPri" pointcut-ref="pointcut1"/>
    </aop:aspect >
</aop:config>


</beans>

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