expected at least 1 bean which qualifies as autowire candidate for this dependency

2018-4-13 10:29:55 org.apache.catalina.core.ApplicationContext log
严重: Error creating bean with name ‘materController’: Injection of autowired
dependencies failed;Could not autowire field: No qualifying bean of type
[com.cn.service.RelationService] found for dependency: expected at least 1 bean
which qualifies as autowire candidate for this dependency.

原因：bean没有注入。
<!-- 自动扫描(自动注入) --> <context:component-scan base-package="com.imut.service" />
@Service("userService") public class UserServiceImpl implements IUserService {
private UserMapper userMapper; public UserMapper getUserMapper() { return
userMapper; }@Autowired public void setUserMapper(UserMapper userMapper) { this
.userMapper = userMapper; }
解决：
<!-- 自动扫描(自动注入) --> <context:component-scan base-package="com.imut.serviceImpl"
/>

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