错误org.hibernate.AnnotationException: No identifier specified for entity

org.hibernate.AnnotationException: No identifier specified for entity

 

报这个异常的原因是因为JavaBeam的主键没有注解映射关系

 

解决方案如下:

 

 

@Id  
@GeneratedValue(strategy=GenerationType.IDENTITY)   
@Column(name="ID", unique=true, nullable=false, insertable=true, updatable=false, precision=20, scale=0) 

 

或者

 

@Id
@GeneratedValue(generator = "paymentableGenerator")     
@GenericGenerator(name = "paymentableGenerator", strategy = "sequence",     
	                  parameters = { @Parameter(name = "sequence", value = "TEST_SEQ") })