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Hibernate中使用Oracle Seqence生成自增字段（hbm版）

1、创建表
CREATE TABLE T_CUST(
       CUST_ID      INT            NOT NULL,
       CUST_NAME    VARCHAR2(20)   NOT NULL,
       CONSTRAINT   PK_T_CUST      PRIMARY KEY (CUST_ID)
);

2、创建序列
CREATE SEQUENCE S_CUST_ID
MINVALUE     1
MAXVALUE     10000000
START WITH   1
INCREMENT BY 1
NOCACHE;

3、试试序列是否起作用
INSERT INTO T_CUST(CUST_ID, CUST_NAME) VALUES(S_CUST_ID.NEXTVAL, 'hahaha');

SELECT * FROM T_CUST;

结果：
|CUST_ID|CUST_NAME|
|1      |hahaha   |

4、配置TCust.hbm.xml文件
<hibernate-mapping>
    <class name="demo.hb.sequence.Cust" table="T_CUST" schema="DEMO">
        <id name="custId" type="java.lang.Long">
            <column name="CUST_ID" precision="22" scale="0" />
            <!-- 使用Oracle Sequence的重点 -->
            <generator class="sequence">
                <!-- Oracle Sequence的名字 -->
                <param name="sequence">S_CUST_ID</param>
            </generator>
        </id>
        <property name="custName" type="java.lang.String">
            <column name="CUST_NAME" length="20" not-null="true" />
        </property>
    </class>
</hibernate-mapping>

posted on 2008-04-28 14:55 Wacky 阅读(824) 评论(0)  编辑  收藏