Spring的父子容器问题

在ssm框架搭建的时候

配置了一个Spring容器，又配置了一个前端控制器

<!-- 初始化spring容器 -->
<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring/applicationContext-*.xml</param-value>
</context-param>

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--springmvc前端控制器-->
<servlet>
    <servlet-name>springmvc</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- contextConfigLocation不是必须的， 如果不配置contextConfigLocation，
        springmvc的配置文件默认在：WEB-INF/servlet的name+"-servlet.xml" -->
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

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" alt="" />

子容器可以访问父容器的对象，父容器不能访问子容器中的对象。

对于属性又不一样了，如果在父容器中有properties文件，其中的属性子容器是访问不到的！跨容器了！！

<属性互相都访问不到>

所以在Controller中可以注入一个Service对象

aaarticlea/png;base64,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" alt="" />

所有的Controller对象都放在springmvc容器中

springmvc.xml

......
<!--配置包扫描器-->
<context:component-scan base-package="com.winner.controller"/>
......

只扫controller,不要扫多了，如果springmvc容器扫多了，那么父子容器都有一套service，controller肯定用自容器的service，在一块嘛！那么在父容器中配置的事务就不生效了！！！

Service和Mapper对象都放在Spring容器中

applicationContext-dao.xml

.......
<!--包扫描器，扫描代理mapper-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.winner.mapper"/>
</bean>
......

applicationContext-service.xml

......
<!--包扫描器，扫描带@Service注解的类-->
<context:component-scan base-package="com.winner.service"/>
......