org.springframework.beans.factory.annotation.Autowired(required=true)-优快云博客

本文分析了Spring框架中出现依赖注入失败的具体原因，并提供了两种常见解决方案：一是确保DAO层正确标注了@Repository注解；二是检查Spring配置文件是否包含了对service和repository包的扫描。

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Injection of autowired dependencies failed

ERROR org.springframework.web.context.ContextLoader - Context initialization failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'searchController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.yisa.information.service.PersonService com.yisa.information.controller.SearchController.personService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'personServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.yisa.information.dao.PersonDao com.yisa.information.service.impl.PersonServiceImpl.pd; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.yisa.information.dao.PersonDao] 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.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)

at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1204)。

对于该错误信息，由提示直观翻译即可知道是autowired标签依赖注入失败。

出现该错误的原因是由于用于访问数据库的DAO层中Bean未定义。直白说就是xxxxDaoImpl中忘了写@Repository标签。

来自为知笔记(Wiz)

还有一个原因是没有在springMVC配置文件中没有将service和respository注释的包加入这里面,就是没有被Spring扫描到