springmvc 中配置aop

  之前自己搭建了springmvc+spring+mybaits/hibernate 的框架,并在applicationcontext.xml中配置了aop,但 发现aop根本不生效,而不用框架的话则可以生效。

  applicationContext.xml配置如下:

<?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:context="http://www.springframework.org/schema/context"
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-2.5.xsd 
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:annotation-config/>
<context:component-scan base-package="springframe"></context:component-scan>
<context:property-placeholder location="classpath:/configFile/c3p0.properties" ignore-unresolvable="true"/>

<bean id="dataSource" class="com.mchange.v2.c3p0.DriverManagerDataSource">
<property name="driverClass" value="${dataSource.driverClassName}"></property>
<property name="jdbcUrl" value="${dataSource.url}"></property>
<property name="user" value="${dataSource.username}"></property>
<property name="password" value="${dataSource.password}"></property>

</bean>

<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean" >
<property name="dataSource" ref="dataSource"></property>
<property name="mapperLocations" value="classpath:mapper/*_mapper.xml"/>
</bean>

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 
<property name="basePackage" value="springframe.dao" /> 
</bean>

<aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy>
<aop:config>
<aop:aspect ref="aopBean" >
<aop:pointcut expression="execution(* springframe.service.EmployeeService.*(..))" id="pointcut"/>
<aop:before method="before" pointcut-ref="pointcut"/>
<aop:after method="after" pointcut-ref="pointcut"/>
<aop:around method="around" pointcut-ref="pointcut"/>
</aop:aspect>
</aop:config> 

<!-- 文件上传 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="5242880"/>
</bean>

</beans>

springmvc的配置文件,spring-servlet.xml的配置如下

<beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:context="http://www.springframework.org/schema/context" 
xmlns:p="http://www.springframework.org/schema/p" 
xmlns:mvc="http://www.springframework.org/schema/mvc" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context.xsd 
http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> 
<!-- 启动注解驱动的Spring MVC功能,注册请求url和注解POJO类方法的映射--> 
<mvc:annotation-driven /> 
<mvc:resources location="/resources/" mapping="/resources/**"/> 
<!-- 启动包扫描功能,以便注册带有@Controller、@Service、@repository、@Component等注解的类成为spring的bean --> 
<context:component-scan base-package="springframe" /> 

<!-- 对模型视图名称的解析,在请求时模型视图名称添加前后缀 --> 
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/" p:suffix=".jsp" />

</beans>

观察发现,在application.xml和spring-servlet.xml中都配置了

<context:component-scan base-package="springframe" />

 这样的话,aop就不生效了

 问题: aop是配置在application.xml中的,容器启动的时候开始扫描,此时本来aop是可以生效的,但在spring-servlet.xml中又再次扫描了一次指定包下的类,但spring-servlet.xml只负责controller,其它的一概不管,这样就导致了aop与service关联的实效,从而导致,aop不生效。

解决办法:spring容器正常扫描包,不过一般不让它扫描controller,因为springmvc还要再次扫描controller;springmvc配置只让它扫描controller,这样就避免了aop类与service失去关联,避免aop不生效。

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原文地址:https://www.cnblogs.com/yxjdragon/p/5804198.html