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

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ssm框架，使用注解，在启动tomcat服务器报错，

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

找错找了好久发现是spring配置文件中没有配置相应的映射文件的bean,

<!-- 配置mapper扫描器 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">    <!-- 扫描mybatis映射包路径，如果需要扫描多个包中间用半角逗号隔开 -->    <property name="basePackage" value="com.china.bill.mapper"></property>    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/></bean>

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