spring+jpa+activiti，Tomcat启动出错

Question

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'approvationService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private main.java.org.beifeng.oa.dao.ApprovationRepository main.java.org.beifeng.oa.service.impl.ApprovationServiceImpl.approvationRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'approvationRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not an managed type: class main.java.org.beifeng.oa.entity.Approvation