PropertyPlaceholderConfigurer与MapperScannerConfigurer的bean注入出错

如果使用这种扫描方式：

    default-lazy-init="true" default-init-method="init" default-destroy-method="close">
   <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
      <property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE" />
      <property name="ignoreResourceNotFound" value="false" />
      <property name="locations">
         <list>
            <value>file:/data/**/**-wap.properties</value>
         </list>
      </property>
   </bean>
   <context:component-scan base-package="com.**.wap.controller"/>
   <context:component-scan base-package="com.**.wap.service"/>
   <context:component-scan base-package="com.**.wap.dao"/>

</beans>

如果web.xml中扫描顺序出错也会报错：

Caused by: org.springframework.beans.TypeMismatchException:

解决如下：