1.选择java类型，会生成Long，hibernate只会生成long
2.SEQUENCE主键
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE,generator="role_seq")
@SequenceGenerator(name="role_seq", sequenceName="SEQ_SYS_ROLES")
@Column(name = "ID", unique = true, nullable = false, precision = 22, scale = 0)
3.程序自己控制
@GeneratedValue(generator = "paymentableGenerator")
@GenericGenerator(name = "paymentableGenerator", strategy = "assigned")
4.自动增长列
@GeneratedValue(strategy = IDENTITY)