spring mvc注入Mapper报错

spring mvc报错 expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true) 

web.xml中引入的xml文件中加上这一段
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.mapper" />
    <!--指定sqlSessionFactory -->
    <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>