org.hibernate.MappingException: Unknown entity

![![图片说明](https://img-ask.csdn.net/upload/201708/16/1502849088_129198.png)图片说明](https://img-ask.csdn.net/upload/201708/16/1502849078_996260.png)图片说明

就是你的那个实体类引入有问题呗