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

我不是女神ヾ 2022-06-18 13:11 187阅读 0赞

ssm框架，使用注解，在启动tomcat服务器报错，

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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,

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        
        <property name="basePackage" value="com.china.bill.mapper"></property>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>

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