关于use-default-filters

• use-default-filters = "true"：表示默认扫描所有包，即controller,mapper,service等等，默认为true，一般在spring.xml里面与exclude-filter搭配使用，达到不注入controller的效果(一般在springMVC.xml里配置扫描controller，在这里排除以避免重复扫描)

• use-default-filters = "false"与include-filter在springMVC.xml里面搭配使用，限制只扫描controller，同样避免重复扫描

• springMVC.xml配置文件中配置只扫描controller

<context:component-scan base-package="only.mxb.traindemo.controller" use-default-filters="false">
    <!-- 只扫描控制器 -->
    <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    <context:include-filter type="annotation"
                            expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
</context:component-scan>

• spring.xml文件配置文件中配置不扫描controller

<context:component-scan base-package="only.mxb.traindemo">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        <context:exclude-filter type="annotation"
                                expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
    </context:component-scan>