Hibernate 一对一连接表双向关联

2007-08-22 17:24:24

　标签：Hibernate 一对一　　　[推送到技术圈]

Hibernate 一对一连接表双向关联

一、模型介绍

一个人（Person）对应一个地址（Address）。

二、实体（省略getter、setter方法）

public class Person11tab_sx {

private int personid;

private String name;

private int age;

private Address11tab_sx address11tab_sx;

public class Address11tab_sx {

private int addressid;

private String addressdetail;

private Person11tab_sx person11tab_sx;

三、表模型

mysql> desc person_11tab_sx;

+----------+--------------+------+-----+---------+----------------+

+----------+--------------+------+-----+---------+----------------+

| personid | int(11) | NO | PRI | NULL | auto_increment |

| age | int(11) | YES | | NULL | |

+----------+--------------+------+-----+---------+----------------+

mysql> desc join_11tab_sx;

+-----------+---------+------+-----+---------+-------+

+-----------+---------+------+-----+---------+-------+

| addressid | int(11) | NO | UNI | | |

| personid | int(11) | NO | PRI | | |

+-----------+---------+------+-----+---------+-------+

mysql> desc address_11tab_sx;

+---------------+--------------+------+-----+---------+----------------+

+---------------+--------------+------+-----+---------+----------------+

| addressid | int(11) | NO | PRI | NULL | auto_increment |

+---------------+--------------+------+-----+---------+----------------+

四、生成的SQL脚本

/* Formatted on 2007/08/22 17:35 (QP5 v5.50) */

CREATE TABLE `person_11tab_sx` (

`personid` int(11) NOT NULL auto_increment,

`name` varchar(255) default NULL,

`age` int(11) default NULL,

PRIMARY KEY (`personid`)

) ENGINE=InnoDB DEFAULT CHARSET=gbk;

/* Formatted on 2007/08/22 17:34 (QP5 v5.50) */

CREATE TABLE `address_11tab_sx` (

`addressid` int(11) NOT NULL auto_increment,

`addressdetail` varchar(255) default NULL,

PRIMARY KEY (`addressid`)

) ENGINE=InnoDB DEFAULT CHARSET=gbk;

/* Formatted on 2007/08/22 18:35 (QP5 v5.50) */
CREATE TABLE `join_11tab_sx` (
`addressid` int(11) NOT NULL,
`personid` int(11) NOT NULL,
PRIMARY KEY (`personid`),
UNIQUE KEY `addressid` (`addressid`),
UNIQUE KEY `personid` (`personid`),
KEY `FKF4AA80E44327AAB6` (`personid`),
KEY `FKF4AA80E460C0C9F0` (`addressid`),
CONSTRAINT `FKF4AA80E460C0C9F0` FOREIGN KEY (`addressid`) REFERENCES `address_11tab_sx` (`addressid`),
CONSTRAINT `FKF4AA80E44327AAB6` FOREIGN KEY (`personid`) REFERENCES `person_11tab_sx` (`personid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;

五、映射方法

<hibernate-mapping>

</id>

<join table="join_11tab_sx"

optional="true">

<key column="personid"

unique="true"/>

<many-to-one name="address11tab_sx"

column="addressid"

not-null="true"

unique="true"/>

</join>

</class>

</hibernate-mapping>

<hibernate-mapping>

</id>

<join table="join_11tab_sx"

optional="true"

inverse="true">

<key column="addressid"

unique="true"/>

<many-to-one name="person11tab_sx" column="personid"

not-null="true" unique="true"/>

</join>

</class>

</hibernate-mapping>

六、测试方法

public class Test_11tab_sx {

public static void main(String[] args){

Address11tab_sx add = new Address11tab_sx();

Person11tab_sx p = new Person11tab_sx();

add.setAddressdetail("郑州市经三路");

p.setAge(12);

p.setName("wudalang");

add.setPerson11tab_sx(p);

p.setAddress11tab_sx(add);

Session session = HibernateUtil.getCurrentSession();

Transaction tx = session.beginTransaction();

session.saveOrUpdate(p);

session.saveOrUpdate(add);

tx.commit();

HibernateUtil.closeSession();

}

七、测试结果

1) :正常保存.

session.saveOrUpdate(p);

session.saveOrUpdate(add);

Hibernate: insert into PERSON_11tab_sx (name, age) values (?, ?)

Hibernate: insert into ADDRESS_11tab_sx (addressdetail) values (?)

Hibernate: insert into join_11tab_sx (addressid, personid) values (?, ?)

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Hibernate 一对一连接表双向关联

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