org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type

ssm框架，使用註解，在啓動tomcat服務器報錯，

Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.china.bill.java.dao.UserDao com.china.bill.java.service.impl.UserBizImpl.userDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.china.bill.java.dao.UserDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:514)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285)
... 21 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No matching bean of type [com.china.bill.java.dao.UserDao] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:949)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:818)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:486)
... 23 more

找錯找了好久發現是spring配置文件中沒有配置相應的映射文件的bean,

<!-- 配置mapper掃描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <!-- 掃描mybatis映射包路徑，如果需要掃描多個包中間用半角逗號隔開 -->
    <property name="basePackage" value="com.china.bill.mapper"></property>
    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>