hibernate报错：Use of @OneToMany or @ManyToMany targeting an unmapped class

hibernate报错：Use of @OneToMany or @ManyToMany targeting an unmapped class:

报错如下：

?

org.hibernate.AnnotationException: Use of @OneToMany or @ManyToMany targeting an unmapped class: pp.entity.Employee.departments[pp.entity.Department]

1.hibernate.cfg.xml忘记了：

<session-factory><mapping name="code">@Entity@Tablepublic class Department {//...}