jpa中主键使用oracle序列

jpa中主键使用oracle序列

实体类配置

@Id
 @GeneratedValue(strategy=GenerationType.SEQUENCE,generator="mseq")
 @SequenceGenerator(name="mseq",sequenceName="metadata_seq",allocationSize=1)
 @Column(name = "ENTID", unique = true, nullable = false, precision = 22, scale = 0)
 public long getEntid() {
  return this.entid;
 }

sequenceName 是自己在oracle中创建的序列。allocationSize要指定为1，否则它会按照默认50个数字增长。

http://five.iteye.com/blog/1722135