SSM Service自动注入失败

Posted 2021-03-18 phdeblog

报错先贴出来：

Error creating bean with name ‘testController‘: 
Unsatisfied dependency expressed through field ‘userInfoService‘: No qualifying bean of type [bcs.wms.service.UserInfoService] found for dependency [bcs.wms.service.UserInfoService]:
 expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)};
 nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [bcs.wms.service.UserInfoService] found for dependency [bcs.wms.service.UserInfoService]: 
expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

在控制器自动注入Service时报以上错误。

1、首先要确保语法正确（包括已添加@Service注解）

2、其次要看配置文件有没有配置相关的自动扫描，并且很可能不止要在一个文件里要配置。

spring的配置文件要配置，spring-mvc的配置文件也要配置。本次出错正是因为没有在spring-mvc的配置文件里配置，才导致controller层自动注入Service时出错。

解决方案：

在spring、springmvc的配置文件中，都要加上：

   <context:component-scan base-package="bcs.wms.service"/>        （bcs.wms.service替换成自己的包）