실패 나는 예외 것 같다봄 주입 내가 <code>BaseDAO</code> 일부 서브 클래스 예를
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userService': Injection of resource fields failed; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.cloudking.trafficmonitor.BaseDAO] is defined: expected single matching bean but found 3: [roleDAO, userDAO