org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'app':

Unsatisfied dependency expressed through field 'userDOMapper': No qualifying bean of type [com.cut.dao.UserDOMapper] found for dependency [com.cut.dao.UserDOMapper]: 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 [com.cut.dao.UserDOMapper] found for dependency [com.cut.dao.UserDOMapper]: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

求大神解救一下，一直報這個錯誤，開始我完全照老師的代碼，報這個錯誤，后來我把接口類加上Component注解或者Repository注解反正能換的我都試過了，完全報同樣的錯誤，檢查了各個配置的路徑也沒有錯誤，代碼不報錯，編譯報錯。不知道問題出在哪，怎么解決？？