Hibernate 4.2.21 GenerationType.SEQUENCE

Question

我正在使用Hibernate 4.2.21决赛，以生成我使用的ID：strategy=GenerationType.SEQUENCE

@Id 
@SequenceGenerator(name = "ApplicationSequence", sequenceName =
"application_seq", allocationSize=1)
@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="ApplicationSequence")      
@Column(name = "application_id", unique = true, nullable = false) private Long id;

我的问题是为什么Hibernate会随机生成我的身份证.

比如1，2，3，67，89，96等等.

当我的allocationSize = 1？应该是: 1,2,3,4,5,6。

编辑:Oracle12中的编辑

CREATE SEQUENCE  "OSYDBA"."APPLICATION_SEQ"  
MINVALUE 1 MAXVALUE 9999999999999999999999999999 
INCREMENT BY 1 START WITH 1
CACHE 20 NOORDER  NOCYCLE  NOPARTITION ;

Answer 1

不要让Oracle执行任何序列值：

CREATE SEQUENCE APPLICATION_SEQ
      INCREMENT BY 1
      START WITH 1
      NOMAXVALUE
      NOCYCLE
      NOCACHE;