No qualifying bean of type ‘********’available: expected at least

No qualifying bean of type 'com.icompanybar.programmer.service.AnnounceService' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

报这样的错一般是因为自己的service没有注解@Service，所以找不到，这时候查看自己的service层的实现类上面有没有注解@Service