单元测试：java.lang.IllegalStateException: Failed to load ApplicationContext

1 . Cause by:....No identifier specified for entity :org.lee.model.User

     解决：检查数据库实体映射对应的model的主键属性前添加  @Id

               如果主键在数据库中是自动增长的话除了添加  @Id 外还需要添加 @GeneratedValue

2 . Cause by....Repeated column in mapping for entity: org.lee.model.ExamRole column: name

   错因：@column重复，复制的时候记得及时改正

3 .Caused by :  org .hibernate.MappingException: Repeated columnin mapping for entity: org.lee.model.ExamTest column: sub_id (should 

           be mappedwith  insert="false" update="false")

 

     错因及解决：在设置ManyToOne的时候，除了注入的@JoinColumn(name="sub_id")这个字段之外还设置了private String sub_id;以及

               setter,getter方法，造成重复,去掉后者以及后者的setter，getter即可

      

4 . Caused by: org.hibernate.AnnotationException: @OneToOne or@ManyToOne on org.lee.model.UserHibernate.examSubjectHibernate

                     references anunknown entity: org.lee.model.ExamSubjectHibernate

 解决：在model设置了@ManyToOne等映射注解，却没有在model前面添加@Entity以及@Table(name=”Table_name”)