Hibernate 一对一连接表双向关联

2019-11-10 20:24:03

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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>