jpa中主键运用oracle序列

jpa中主键使用oracle序列

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@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; }

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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