SSM運作異常 org.springframework.beans.factory.UnsatisfiedDependencyException

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

原因： 依賴注入的注解 @Service 修飾在了接口上，應該修飾在實作類