spring jpa 创建时间和更新时间自动更新

@Entity
@Table(name="RS_SIGNUPUSER")
public class RsSignUpUser {
  @Id
  @GenericGenerator(name="UUIDGENERATE",strategy="uuid2")
  @GeneratedValue(generator="UUIDGENERATE")
  @Column(name="ID",length=36)
  private String ID;
   @Temporal(TemporalType.TIMESTAMP)
  @Column(updatable = false)
  @org.hibernate.annotations.CreationTimestamp
  private Date CREATETIME;
  @Column(name="UPDATETIME")
  @org.hibernate.annotations.UpdateTimestamp
  @Temporal(TemporalType.TIMESTAMP)
  private Date UPDATETIME;