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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