Hibernate从增主键

Hibernate自增主键

Hibernate自增主键(oracle数据库)可以通过序列来实现。

(1)创建表person和序列person_sequence

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-----建表-------create table person(  id number(10) primary key,  name varchar2(10) not null,  age number(3) )-----建序列-----CREATE SEQUENCE person_sequence INCREMENT BY 1 START WITH 1 NOMAXVALUE NOCYCLE CACHE 10; 

?(2)src下新建demo包，包中新建person的pojo类。

?(3)person.java同目录下新建Person.hbm.xml

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<?xml version="1.0" encoding='UTF-8'?><!DOCTYPE hibernate-mapping PUBLIC                            "-//Hibernate/Hibernate Mapping DTD 3.0//EN"                            "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" ><hibernate-mapping package="demo">    <class name="Person" table="person">        <id name="id" column="ID" type="int">         <generator column="NAME" type="string"  not-null="true" />        <property name="age" column="AGE" type="int" />    </class>    </hibernate-mapping>

?按照这样的配置即可以实现主键的自增。