hibernate 关联关系映射目录
一对一外键单向关联
事实上,单向1-1与N-1的实质是相同的,1-1是N-1的特例,单向1-1与N-1的映射配置也非常相似。只需要将原来的many-to-one元素增加unique="true"属性,用于表示N的一端也必须是唯一的,在N的一端增加了唯一的约束,即成为单向1-1。基于外键的单向1-1的配置将与无连接表N-1关联的many-to-one增加unique="true"属性即可。
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 Person11fk {
private int personid;
private String name;
private int age;
private Address11fk address11fk;
public class Address11fk {
private int addressid;
private String addressdetail;
三、表模型
mysql> desc address_11fk;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
+---------------+--------------+------+-----+---------+----------------+
mysql> desc person_11fk;
+-----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
| addressId | int(11) | YES | UNI | NULL | |
+-----------+--------------+------+-----+---------+----------------+
四、生成的SQL脚本
CREATE TABLE `address_11fk` (
`addressid` int(11) NOT NULL auto_increment,
`addressdetail` varchar(255) default NULL,
PRIMARY KEY (`addressid`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=gbk;
CREATE TABLE `person_11fk` (
`personid` int(11) NOT NULL auto_increment,
`name` varchar(255) default NULL,
`age` int(11) default NULL,
`addressId` int(11) default NULL,
PRIMARY KEY (`personid`),
KEY `FK68A8818F3F45AA77` (`addressId`),
CONSTRAINT `FK68A8818F3F45AA77` FOREIGN KEY (`addressId`) REFERENCES `address_11fk` (`addressid`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=gbk;
五、映射方法:
在Person中添加Address属性,映射配置为:
<!--用来映射关联PO column是Address在该表中的外键列名,增加unique变成“1-1”-->
<many-to-one name="address11fk" column="addressId" unique="true"/>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_1_fk.Address11fk" table="ADDRESS_11fk">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_1_fk.Person11fk" table="PERSON_11fk">
<id name="personid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<!--用来映射关联PO column是Address在该表中的外键列名,增加unique变成“1-1”-->
<many-to-one name="address11fk" column="addressId" unique="true"/>
</class>
</hibernate-mapping>
六、测试方法
public class Test_11fk {
public static void main(String[] args){
Person11fk p1=new Person11fk();
p1.setAge(21);
p1.setName("p1");
Address11fk add1=new Address11fk();
add1.setAddressdetail("郑州市经三路");
p1.setAddress11fk(add1);
Session session= HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(add1);
session.save(p1);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存. 推荐这么干!
session.save(add1);
session.save(p1);
Hibernate: insert into ADDRESS_11fk (addressdetail) values (?)
Hibernate: insert into PERSON_11fk (name, age, addressId) values (?, ?, ?)
2) :正常保存.
session.save(p1);
session.save(add1);
Hibernate: insert into PERSON_11fk (name, age, addressId) values (?, ?, ?)
Hibernate: insert into ADDRESS_11fk (addressdetail) values (?)
Hibernate: update PERSON_11fk set name=?, age=?, addressId=? where personid=?
3) :正常保存.
// session.save(p1);
session.save(add1);
Hibernate: insert into ADDRESS_11fk (addressdetail) values (?)
4) : 发生异常,不能保存.
session.save(p1);
// session.save(add1);
Hibernate: insert into PERSON_11fk (name, age, addressId) values (?, ?, ?)
Exception in thread "main" org.hibernate.TransientObjectException: com.lavasoft.dx._1_1_fk.Address11fk
一对一主键单向关联
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 Person11pk {
private int personid;
private String name;
private int age;
private Address11pk address11pk;
public class Address11pk {
private int addressid;
private String addressdetail;
三、表模型
mysql> desc address_11pk;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
+---------------+--------------+------+-----+---------+----------------+
mysql> desc person_11pk;
+----------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+-------+
| personid | int(11) | NO | PRI | | |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+-------+
四、生成的SQL脚本
/* Formatted on 2007/08/22 14:40 (QP5 v5.50) */
CREATE TABLE `address_11pk` (
`addressid` int(11) NOT NULL auto_increment,
`addressdetail` varchar(255) default NULL,
PRIMARY KEY (`addressid`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=gbk;
/* Formatted on 2007/08/22 14:41 (QP5 v5.50) */
CREATE TABLE `person_11pk` (
`presonid` int(11) NOT NULL,
`name` varchar(255) default NULL,
`age` int(11) default NULL,
PRIMARY KEY (`presonid`),
KEY `FK68A882C591BB393E` (`presonid`),
CONSTRAINT `FK68A882C591BB393E` FOREIGN KEY (`presonid`) REFERENCES `address_11pk` (`addressid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
五、映射方法:在Person中配置id生成策略为:
<id name="personid">
<!--基于主键关联时,主键生成策略是foreign,表明根据关联类生成主键-->
<generator class="foreign">
<!--关联持久化类的属性名-->
<param name="property">address11pk</param>
</generator>
</id>
......
<!--用于映射1-1关联-->
<one-to-one name="address11pk" constrained="true"/>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_1_pk.Person11pk" table="PERSON_11pk">
<id name="personid" column="presonid">
<!--基于主键关联时,主键生成策略是foreign,表明根据关联类生成主键-->
<generator class="foreign">
<!--关联持久化类的属性名-->
<param name="property">address11pk</param>
</generator>
</id>
<property name="name"/>
<property name="age"/>
<!--用于映射1-1关联-->
<one-to-one name="address11pk" constrained="true"/>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_1_pk.Address11pk" table="ADDRESS_11pk">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
</class>
</hibernate-mapping>
六、测试方法
public class Test_11pk {
public static void main(String[] args){
Person11pk p1=new Person11pk();
p1.setAge(21);
p1.setName("p1");
Address11pk add1=new Address11pk();
add1.setAddressdetail("郑州市经三路");
p1.setAddress11pk(add1);
Session session= HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(add1);
session.save(p1);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存. 推荐这么干!
session.save(add1);
session.save(p1);
Hibernate: insert into ADDRESS_11fk (addressdetail) values (?)
Hibernate: insert into PERSON_11fk (name, age, addressId) values (?, ?, ?)
2) :正常保存.
session.save(p1);
session.save(add1);
Hibernate: insert into PERSON_11fk (name, age, addressId) values (?, ?, ?)
Hibernate: insert into ADDRESS_11fk (addressdetail) values (?)
Hibernate: update PERSON_11fk set name=?, age=?, addressId=? where personid=?
3) :正常保存.
// session.save(p1);
session.save(add1);
Hibernate: insert into ADDRESS_11fk (addressdetail) values (?)
4) : 发生异常,不能保存.
session.save(p1);
// session.save(add1);
Hibernate: insert into PERSON_11fk (name, age, addressId) values (?, ?, ?)
Exception in thread "main" org.hibernate.TransientObjectException:
com.lavasoft.dx._1_1_fk.Address11fk
Hibernate 一对一主键单向关联
1-1的关联可以基于主键关联,但基于主键关联的持久化类不能拥有自己的主键生成策略,它的主键由关联类负责生成。另外,另外,增加one-to-one元素来关联属性,必须为one-to-one元素增加constrained="true"属性,表明该类主键由关联类生成。
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 Person11pk {
private int personid;
private String name;
private int age;
private Address11pk address11pk;
public class Address11pk {
private int addressid;
private String addressdetail;
三、表模型
mysql> desc address_11pk;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
+---------------+--------------+------+-----+---------+----------------+
mysql> desc person_11pk;
+----------+--------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+-------+
| personid | int(11) | NO | PRI | | |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+-------+
四、生成的SQL脚本
/* Formatted on 2007/08/22 14:40 (QP5 v5.50) */
CREATE TABLE `address_11pk` (
`addressid` int(11) NOT NULL auto_increment,
`addressdetail` varchar(255) default NULL,
PRIMARY KEY (`addressid`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=gbk;
/* Formatted on 2007/08/22 14:41 (QP5 v5.50) */
CREATE TABLE `person_11pk` (
`presonid` int(11) NOT NULL,
`name` varchar(255) default NULL,
`age` int(11) default NULL,
PRIMARY KEY (`presonid`),
KEY `FK68A882C591BB393E` (`presonid`),
CONSTRAINT `FK68A882C591BB393E` FOREIGN KEY (`presonid`) REFERENCES `address_11pk` (`addressid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
五、映射方法:在Person中配置id生成策略为:
<id name="personid">
<!--基于主键关联时,主键生成策略是foreign,表明根据关联类生成主键-->
<generator class="foreign">
<!--关联持久化类的属性名-->
<param name="property">address11pk</param>
</generator>
</id>
......
<!--用于映射1-1关联-->
<one-to-one name="address11pk" constrained="true"/>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_1_pk.Person11pk" table="PERSON_11pk">
<id name="personid" column="presonid">
<!--基于主键关联时,主键生成策略是foreign,表明根据关联类生成主键-->
<generator class="foreign">
<!--关联持久化类的属性名-->
<param name="property">address11pk</param>
</generator>
</id>
<property name="name"/>
<property name="age"/>
<!--用于映射1-1关联-->
<one-to-one name="address11pk" constrained="true"/>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_1_pk.Address11pk" table="ADDRESS_11pk">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
</class>
</hibernate-mapping>
六、测试方法
public class Test_11pk {
public static void main(String[] args){
Person11pk p1=new Person11pk();
p1.setAge(21);
p1.setName("p1");
Address11pk add1=new Address11pk();
add1.setAddressdetail("郑州市经三路");
p1.setAddress11pk(add1);
Session session= HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(add1);
session.save(p1);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存. 推荐这么干!session.save(add1);
session.save(p1);
Hibernate: insert into ADDRESS_11fk (addressdetail) values (?)
Hibernate: insert into PERSON_11fk (name, age, addressId) values (?, ?, ?)
2) :正常保存.
session.save(p1);
session.save(add1);
Hibernate: insert into PERSON_11fk (name, age, addressId) values (?, ?, ?)
Hibernate: insert into ADDRESS_11fk (addressdetail) values (?)
Hibernate: update PERSON_11fk set name=?, age=?, addressId=? where personid=?
3) :正常保存.
// session.save(p1);
session.save(add1);
Hibernate: insert into ADDRESS_11fk (addressdetail) values (?)
4) : 发生异常,不能保存.
session.save(p1);
// session.save(add1);
Hibernate: insert into PERSON_11fk (name, age, addressId) values (?, ?, ?)
Exception in thread "main" org.hibernate.TransientObjectException: com.lavasoft.dx._1_1_fk.Address11fk
一对一连接表单向关联
这种情况很少见,但Hibernate同样允许采用连接表关联1-1.有连接表的1-1同样只需要将N-1的many-to-one元素增加unique="true"属性即可。
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 {
private int personid;
private String name;
private int age;
private Address11tab address11tab;
public class Address11tab {
private int addressid;
private String addressdetail;
三、表模型
mysql> desc address_11tab;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
+---------------+--------------+------+-----+---------+----------------+
mysql> desc join_11tab;
+--------------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------------+---------+------+-----+---------+-------+
| personid | int(11) | NO | PRI | | |
| address11tab | int(11) | YES | UNI | NULL | |
+--------------+---------+------+-----+---------+-------+
mysql> desc person_11tab;
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+----------------+
四、生成的SQL脚本
/* Formatted on 2007/08/20 16:52 (QP5 v5.50) */
CREATE TABLE `join_11tab` (
`personid` int(11) NOT NULL,
`address11tab` int(11) default NULL,
PRIMARY KEY (`personid`),
UNIQUE KEY `address11tab` (`address11tab`),
KEY `FK6B44BE20C4CC3D33` (`address11tab`),
KEY `FK6B44BE209049BB1F` (`personid`),
CONSTRAINT `FK6B44BE209049BB1F` FOREIGN KEY (`personid`) REFERENCES `person_11tab` (`personid`),
CONSTRAINT `FK6B44BE20C4CC3D33` FOREIGN KEY (`address11tab`) REFERENCES `address_11tab` (`addressid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
/* Formatted on 2007/08/20 16:53 (QP5 v5.50) */
CREATE TABLE `address_11tab` (
`addressid` int(11) NOT NULL auto_increment,
`addressdetail` varchar(255) default NULL,
PRIMARY KEY (`addressid`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=gbk;
/* Formatted on 2007/08/20 16:53 (QP5 v5.50) */
CREATE TABLE `person_11tab` (
`personid` int(11) NOT NULL auto_increment,
`name` varchar(255) default NULL,
`age` int(11) default NULL,
PRIMARY KEY (`personid`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=gbk;
五、映射方法:在Person中添加Address属性,映射配置为:
<!--使用join元素显式确定链接表-->
<join table="join_11tab">
<key column="personid"/>
<!--映射1-1关联属性,其中unique=“true”属性确定为“1-1”-->
<many-to-one name="address11tab" unique="true"/>
</join>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_1_tab.Person11tab" table="PERSON_11tab">
<id name="personid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<!--使用join元素显式确定链接表-->
<join table="join_11tab">
<key column="personid"/>
<!--映射1-1关联属性,其中unique=“true”属性确定为“1-1”-->
<many-to-one name="address11tab" unique="true"/>
</join>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_1_tab.Address11tab" table="ADDRESS_11tab">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
</class>
</hibernate-mapping>
六、测试方法
public class Test_11tab {
public static void main(String[] args){
Person11tab p1=new Person11tab();
p1.setAge(21);
p1.setName("p1");
Address11tab add1=new Address11tab();
add1.setAddressdetail("郑州市经三路");
p1.setAddress11tab(add1);
Session session= HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(add1);
session.save(p1);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存. 推荐这么干!
session.save(add1);
session.save(p1);
Hibernate: insert into ADDRESS_11tab (addressdetail) values (?)
Hibernate: insert into PERSON_11tab (name, age) values (?, ?)
Hibernate: insert into join_11tab (address11tab, personid) values (?, ?)
2) :正常保存.
session.save(p1);
session.save(add1);
Hibernate: insert into PERSON_11tab (name, age) values (?, ?)
Hibernate: insert into join_11tab (address11tab, personid) values (?, ?)
Hibernate: insert into ADDRESS_11tab (addressdetail) values (?)
Hibernate: update join_11tab set address11tab=? where personid=?
3) :正常保存.
// session.save(p1);
session.save(add1);
Hibernate: insert into ADDRESS_11tab (addressdetail) values (?)
4) : 发生异常,不能保存.
session.save(p1);
// session.save(add1);
Hibernate: insert into PERSON_11tab (name, age) values (?, ?)
Hibernate: insert into join_11tab (address11tab, personid) values (?, ?)
Exception in thread "main" org.hibernate.TransientObjectException:
com.lavasoft.dx._1_1_tab.Address11tab
一对多外键单向关联
这种情况很少见,但Hibernate同样允许采用连接表关联1-1.有连接表的1-1同样只需要将N-1的many-to-one元素增加unique="true"属性即可。
一、模型介绍
一个人(Person)对应多个地址(Address),比如家庭地址、公司地址。
二、实体(省略getter、setter方法)
public class Person1nfk implements Serializable {
private int personid;
private String name;
private int age;
private Set addresses=new HashSet();
public class Address1nfk implements Serializable {
private int addressid;
private String addressdetail;
三、表模型
mysql> desc address_1nfk;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
| personid | int(11) | YES | MUL | NULL | |
+---------------+--------------+------+-----+---------+----------------+
mysql> desc person_1nfk;
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+----------------+
四、生成的SQL脚本
/* Formatted on 2007/08/21 10:06 (QP5 v5.50) */
CREATE TABLE `address_1nfk` (
`addressid` int(11) NOT NULL auto_increment,
`addressdetail` varchar(255) default NULL,
`addresses` int(11) default NULL,
PRIMARY KEY (`addressid`),
KEY `FK9B93456DC08D1667` (`addresses`),
CONSTRAINT `FK9B93456DC08D1667` FOREIGN KEY (`addresses`) REFERENCES `person_1nfk` (`personid`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=gbk;
/* Formatted on 2007/08/21 10:07 (QP5 v5.50) */
CREATE TABLE `person_1nfk` (
`personid` int(11) NOT NULL auto_increment,
`name` varchar(255) default NULL,
`age` int(11) default NULL,
PRIMARY KEY (`personid`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=gbk;
五、映射方法:在实体类Person里面添加Address的集合,即可形成一对多关系。
<!--映射集合属性,关联到持久化类,inverse="false"表示主控端在Person1nfk端,lazy="false"表示不采用延迟加载-->
<set name="addresses"
table="ADDRESS_1nfk"
cascade="all"
>
<!--确定关联的外键列-->
<key column="personid"/>
<!--用以映射到关联类属性-->
<one-to-many class="com.lavasoft.dx._1_n_fk.Address1nfk"/>
</set>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_n_fk.Person1nfk" table="PERSON_1nfk">
<id name="personid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<!--映射集合属性,关联到持久化类,inverse="false"表示主控端在Person1nfk端,lazy="false"表示不采用延迟加载-->
<set name="addresses"
table="ADDRESS_1nfk"
cascade="all"
>
<!--确定关联的外键列-->
<key column="personid"/>
<!--用以映射到关联类属性-->
<one-to-many class="com.lavasoft.dx._1_n_fk.Address1nfk"/>
</set>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_n_fk.Address1nfk" table="ADDRESS_1nfk">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
</class>
</hibernate-mapping>
六、测试方法
public class Test_1nfk {
public static void main(String[] args){
Address1nfk add1=new Address1nfk();
Address1nfk add2=new Address1nfk();
Person1nfk p=new Person1nfk();
add1.setAddressdetail("郑州市经三路");
add2.setAddressdetail("合肥市宿州路");
p.setName("wang");
p.setAge(30);
p.getAddresses().add(add1);
p.getAddresses().add(add2);
Session session= HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(add1);
session.save(add2);
session.save(p);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存.
// session.save(add1);
// session.save(add2);
session.save(p);
Hibernate: insert into PERSON_1nfk (name, age) values (?, ?)
Hibernate: insert into ADDRESS_1nfk (addressdetail) values (?)
Hibernate: insert into ADDRESS_1nfk (addressdetail) values (?)
Hibernate: update ADDRESS_1nfk set personid=? where addressid=?
Hibernate: update ADDRESS_1nfk set personid=? where addressid=?
2) :正常保存.
session.save(add1);
session.save(add2);
session.save(p);
Hibernate: insert into ADDRESS_1nfk (addressdetail) values (?)
Hibernate: insert into ADDRESS_1nfk (addressdetail) values (?)
Hibernate: insert into PERSON_1nfk (name, age) values (?, ?)
Hibernate: update ADDRESS_1nfk set personid=? where addressid=?
Hibernate: update ADDRESS_1nfk set personid=? where addressid=?
3) :正常保存.
session.save(add1);
session.save(add2);
// session.save(p);
Hibernate: insert into ADDRESS_1nfk (addressdetail) values (?)
Hibernate: insert into ADDRESS_1nfk (addressdetail) values (?)
一对多连接表单向关联
一、模型介绍
一个人(Person)对应多个地址(Address),比如家庭地址、公司地址。
二、实体(省略getter、setter方法)
public class Person1ntab {
private int personid;
private String name;
private int age;
private Set addresses=new HashSet();
public class Address1nfk implements Serializable {
private int addressid;
private String addressdetail;
三、表模型
mysql> desc join_1ntab;
+-----------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------+---------+------+-----+---------+-------+
| personid | int(11) | NO | PRI | | |
| addressid | int(11) | NO | PRI | | |
+-----------+---------+------+-----+---------+-------+
mysql> desc person_1ntab;
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+----------------+
mysql> desc address_1ntab;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
+---------------+--------------+------+-----+---------+----------------+
四、生成的SQL脚本
/* Formatted on 2007/08/21 10:58 (QP5 v5.50) */
CREATE TABLE `address_1ntab` (
`addressid` int(11) NOT NULL auto_increment,
`addressdetail` varchar(255) default NULL,
PRIMARY KEY (`addressid`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=gbk;
/* Formatted on 2007/08/21 10:58 (QP5 v5.50) */
CREATE TABLE `join_1ntab` (
`personid` int(11) NOT NULL,
`addressid` int(11) NOT NULL,
PRIMARY KEY (`personid`,`addressid`),
UNIQUE KEY `addressid` (`addressid`),
KEY `FK6B6078C3C8DF5BFF` (`personid`),
KEY `FK6B6078C3C2B11347` (`addressid`),
CONSTRAINT `FK6B6078C3C2B11347` FOREIGN KEY (`addressid`) REFERENCES `address_1ntab` (`addressid`),
CONSTRAINT `FK6B6078C3C8DF5BFF` FOREIGN KEY (`personid`) REFERENCES `person_1ntab` (`personid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
/* Formatted on 2007/08/21 10:58 (QP5 v5.50) */
CREATE TABLE `person_1ntab` (
`personid` int(11) NOT NULL auto_increment,
`name` varchar(255) default NULL,
`age` int(11) default NULL,
PRIMARY KEY (`personid`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=gbk;
五、映射方法
<hibernate-mapping>
<class name="com.lavasoft.dx._1_n_tab.Person1ntab" table="PERSON_1ntab">
<id name="personid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<!--映射集合属性,join_1ntab是连接表表名-->
<set name="addresses"
table="join_1ntab"
>
<!--“column="personid"”确定PERSON_1ntab表关联到连接表的外键列名-->
<key column="personid"/>
<!--“column="addressid"”关联PERSON_1ntab表的Address1ntab对象的id在连接表中的列名-->
<!--“unique="true"表示1-N,Person1ntab是1,Address1ntab是多”-->
<many-to-many
column="addressid"
unique="true"
class="com.lavasoft.dx._1_n_tab.Address1ntab"/>
</set>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.dx._1_n_tab.Address1ntab" table="ADDRESS_1ntab">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
</class>
</hibernate-mapping>
六、测试方法
public class Test_1ntab {
public static void main(String[] args){
Address1ntab add1=new Address1ntab();
Address1ntab add2=new Address1ntab();
Address1ntab add3=new Address1ntab();
Person1ntab p1=new Person1ntab();
Person1ntab p2=new Person1ntab();
add1.setAddressdetail("郑州市经三路");
add2.setAddressdetail("合肥市宿州路");
add3.setAddressdetail("北京市长安路");
p1.setName("wang");
p1.setAge(30);
p2.setName("lee");
p2.setAge(50);
p1.getAddresses().add(add1);
p1.getAddresses().add(add2);
//p2.getAddresses().add(add2);
p2.getAddresses().add(add3);
Session session= HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(add1);
session.save(add2);
session.save(add3);
session.save(p1);
session.save(p2);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存.
session.save(add1);
session.save(add2);
session.save(add3);
session.save(p1);
session.save(p2);
Hibernate: insert into PERSON_1nfk (name, age) values (?, ?)
Hibernate: insert into ADDRESS_1nfk (addressdetail) values (?)
Hibernate: insert into ADDRESS_1nfk (addressdetail) values (?)
Hibernate: update ADDRESS_1nfk set personid=? where addressid=?
Hibernate: update ADDRESS_1nfk set personid=? where addressid=?
多对一外键单向关联
一、模型介绍
多个人(Person)对应一个地址(Address)。
二、实体(省略getter、setter方法)
public class Personn1fk {
private int personid;
private String name;
private int age;
private Addressn1fk addressn1fk;
public class Addressn1fk {
private int addressid;
private String addressdetail;
三、表模型
mysql> desc address_n1kf;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
+---------------+--------------+------+-----+---------+----------------+
mysql> desc person_n1kf;
+-----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
| addressId | int(11) | YES | MUL | NULL | |
+-----------+--------------+------+-----+---------+----------------+
四、生成的SQL脚本
CREATE TABLE `address_n1kf` (
`addressid` int(11) NOT NULL auto_increment,
`addressdetail` varchar(255) default NULL,
PRIMARY KEY (`addressid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
DROP TABLE IF EXISTS `person_n1kf`;
CREATE TABLE `person_n1kf` (
`personid` int(11) NOT NULL auto_increment,
`name` varchar(255) default NULL,
`age` int(11) default NULL,
`addressId` int(11) default NULL,
PRIMARY KEY (`personid`),
KEY `FK4571AF54A2A3EE48` (`addressId`),
CONSTRAINT `FK4571AF54A2A3EE48` FOREIGN KEY (`addressId`) REFERENCES `address_n1kf` (`addressid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
五、映射方法
<hibernate-mapping>
<class name="com.lavasoft.dx._n_1_fk.Personn1fk" table="PERSON_n1fk">
<id name="personid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<!--用来映射关联PO column是Address在该表中的外键列名-->
<many-to-one name="addressn1fk" column="addressId"/>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.dx._n_1_fk.Addressn1fk" table="ADDRESS_n1fk">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
</class>
</hibernate-mapping>
六、测试方法
public class Test_n1fk {
public static void main(String[] args){
Personn1fk p1=new Personn1fk();
Personn1fk p2=new Personn1fk();
p1.setAge(21);
p1.setName("p1");
p2.setAge(23);
p2.setName("p2");
Addressn1fk add=new Addressn1fk();
add.setAddressdetail("郑州市经三路");
p1.setAddressn1fk(add);
p2.setAddressn1fk(add);
Session session=HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(add);
session.save(p1);
session.save(p2);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存. 推荐这么干!
session.save(p1);
session.save(p2);
Hibernate: insert into ADDRESS_n1kf (addressdetail) values (?)
Hibernate: insert into PERSON_n1kf (name, age, addressId) values (?, ?, ?)
Hibernate: insert into PERSON_n1kf (name, age, addressId) values (?, ?, ?)
2) :正常保存.
session.save(p1);
session.save(p2);
session.save(add);
Hibernate: insert into PERSON_n1kf (name, age, addressId) values (?, ?, ?)
Hibernate: insert into PERSON_n1kf (name, age, addressId) values (?, ?, ?)
Hibernate: insert into ADDRESS_n1kf (addressdetail) values (?)
Hibernate: update PERSON_n1kf set name=?, age=?, addressId=? where personid=?
Hibernate: update PERSON_n1kf set name=?, age=?, addressId=? where personid=?
3) :正常保存.
session.save(add);
// session.save(p1);
// session.save(p2);
Hibernate: insert into ADDRESS_n1kf (addressdetail) values (?)
4) : 发生异常,不能保存.
// session.save(add);
session.save(p1);
session.save(p2);
Hibernate: insert into PERSON_n1kf (name, age, addressId) values (?, ?, ?)
Hibernate: insert into PERSON_n1kf (name, age, addressId) values (?, ?, ?)
Exception in thread "main" org.hibernate.TransientObjectException: com.lavasoft.dx._n_1_fk.Addressn1kf
多对一连接表单向关联
一、模型介绍
多个人(Person)对应一个地址(Address)。
二、实体(省略getter、setter方法)
public class Personn1tab {
private int personid;
private String name;
private int age;
private Addressn1tab addressn1tab;
public class Addressn1tab {
private int addressid;
private String addressdetail;
三、表模型
mysql> desc address_n1tab;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
+---------------+--------------+------+-----+---------+----------------+
mysql> desc join_n1tab;
+------------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+------------+---------+------+-----+---------+-------+
| personid | int(11) | NO | PRI | | |
| addressn1tab | int(11) | YES | MUL | NULL | |
+------------+---------+------+-----+---------+-------+
mysql> desc person_n1tab;
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+----------------+
四、生成的SQL脚本
CREATE TABLE `address_n1tab` (
`addressid` int(11) NOT NULL auto_increment,
`addressdetail` varchar(255) default NULL,
PRIMARY KEY (`addressid`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=gbk;
CREATE TABLE `join_n1tab` (
`personid` int(11) NOT NULL,
`address11fk` int(11) default NULL,
PRIMARY KEY (`personid`),
KEY `FKAC780AAADAE3A82C` (`personid`),
KEY `FKAC780AAAC6242A64` (`address11fk`),
CONSTRAINT `FKAC780AAAC6242A64` FOREIGN KEY (`address11fk`) REFERENCES `address_n1tab` (`addressid`),
CONSTRAINT `FKAC780AAADAE3A82C` FOREIGN KEY (`personid`) REFERENCES `person_n1tab` (`personid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
CREATE TABLE `person_n1tab` (
`personid` int(11) NOT NULL auto_increment,
`name` varchar(255) default NULL,
`age` int(11) default NULL,
PRIMARY KEY (`personid`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=gbk;
五、映射方法
<hibernate-mapping>
<class name="com.lavasoft.dx._n_1_tab.Personn1tab" table="PERSON_n1tab">
<id name="pesonid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<!--使用join元素显式确定链接表-->
<join table="join_n1tab">
<!--映射关联所用的外键-->
<key column="personid"/>
<many-to-one name="addressn1tab"/>
</join>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.dx._n_1_tab.Addressn1tab" table="ADDRESS_n1tab">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
</class>
</hibernate-mapping>
六、测试方法
public class Test_n1tab {
public static void main(String[] args){
Personn1tab p1=new Personn1tab();
Personn1tab p2=new Personn1tab();
p1.setAge(21);
p1.setName("p1");
p2.setAge(23);
p2.setName("p2");
Addressn1tab add=new Addressn1tab();
add.setAddressdetail("郑州市经三路");
p1.setAddressn1tab(add);
p2.setAddressn1tab(add);
Session session=HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(add);
session.save(p1);
session.save(p2);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存. 推荐这么干!
session.save(p1);
session.save(p2);
Hibernate: insert into ADDRESS_n1tab (addressdetail) values (?)
Hibernate: insert into PERSON_n1tab (name, age) values (?, ?)
Hibernate: insert into join_n1tab (address11fk, personid) values (?, ?)
Hibernate: insert into PERSON_n1tab (name, age) values (?, ?)
Hibernate: insert into join_n1tab (address11fk, personid) values (?, ?)
2) :正常保存.
session.save(p1);
session.save(p2);
session.save(add);
Hibernate: insert into PERSON_n1tab (name, age) values (?, ?)
Hibernate: insert into join_n1tab (address11fk, personid) values (?, ?)
Hibernate: insert into PERSON_n1tab (name, age) values (?, ?)
Hibernate: insert into join_n1tab (address11fk, personid) values (?, ?)
多对多单向关联
一、模型介绍
多个人(Person)对应多个地址(Address)。
一个人可对应多个地址,一个地址也可以对应多个人。
二、实体(省略getter、setter方法)
public class Personnn {
private int personid;
private String name;
private int age;
private Set addresses=new HashSet();
public class Addressnn {
private int addressid;
private String addressdetail;
三、表模型
mysql> desc person_nn;
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+----------------+
mysql> desc join_nn;
+-----------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------+---------+------+-----+---------+-------+
| personid | int(11) | NO | PRI | | |
| addressid | int(11) | NO | PRI | | |
+-----------+---------+------+-----+---------+-------+
mysql> desc person_nn;
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+----------------+
四、生成的SQL脚本
/* Formatted on 2007/08/21 11:13 (QP5 v5.50) */
CREATE TABLE `address_nn` (
`addressid` int(11) NOT NULL auto_increment,
`addressdetail` varchar(255) default NULL,
PRIMARY KEY (`addressid`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=gbk;
/* Formatted on 2007/08/21 11:14 (QP5 v5.50) */
CREATE TABLE `join_nn` (
`personid` int(11) NOT NULL,
`addressid` int(11) NOT NULL,
PRIMARY KEY (`personid`,`addressid`),
KEY `FKAAB98CF5E008E752` (`personid`),
KEY `FKAAB98CF5239F6A16` (`addressid`),
CONSTRAINT `FKAAB98CF5239F6A16` FOREIGN KEY (`addressid`) REFERENCES `address_nn` (`addressid`),
CONSTRAINT `FKAAB98CF5E008E752` FOREIGN KEY (`personid`) REFERENCES `person_nn` (`personid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
/* Formatted on 2007/08/21 11:14 (QP5 v5.50) */
CREATE TABLE `person_nn` (
`personid` int(11) NOT NULL auto_increment,
`name` varchar(255) default NULL,
`age` int(11) default NULL,
PRIMARY KEY (`personid`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=gbk;
五、映射方法
<hibernate-mapping>
<class name="com.lavasoft.dx._n_n.Personnn" table="PERSON_nn">
<id name="personid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<!--映射集合属性,join_1ntab是连接表表名-->
<set name="addresses"
table="join_nn"
>
<!--“column="personid"”确定PERSON_1ntab表关联到连接表的外键列名-->
<key column="personid"/>
<!--“column="addressid"”关联PERSON_1ntab表的Address1ntab对象的id在连接表中的列名-->
<many-to-many
column="addressid"
class="com.lavasoft.dx._n_n.Addressnn"/>
</set>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.dx._n_n.Addressnn" table="ADDRESS_nn">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
</class>
</hibernate-mapping>
六、测试方法
public class Test_nn {
public static void main(String[] args){
Addressnn add1=new Addressnn();
Addressnn add2=new Addressnn();
Addressnn add3=new Addressnn();
Personnn p1=new Personnn();
Personnn p2=new Personnn();
add1.setAddressdetail("郑州市经三路");
add2.setAddressdetail("合肥市宿州路");
add3.setAddressdetail("北京市长安路");
p1.setName("wang");
p1.setAge(30);
p2.setName("lee");
p2.setAge(50);
p1.getAddresses().add(add1);
p1.getAddresses().add(add2);
p2.getAddresses().add(add2);
p2.getAddresses().add(add3);
Session session= HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(add1);
session.save(add2);
session.save(add3);
session.save(p1);
session.save(p2);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存.
session.save(add1);
session.save(add2);
session.save(add3);
session.save(p1);
session.save(p2);
Hibernate: insert into ADDRESS_nn (addressdetail) values (?)
Hibernate: insert into ADDRESS_nn (addressdetail) values (?)
Hibernate: insert into ADDRESS_nn (addressdetail) values (?)
Hibernate: insert into PERSON_nn (name, age) values (?, ?)
Hibernate: insert into PERSON_nn (name, age) values (?, ?)
Hibernate: insert into join_nn (personid, addressid) values (?, ?)
Hibernate: insert into join_nn (personid, addressid) values (?, ?)
Hibernate: insert into join_nn (personid, addressid) values (?, ?)
Hibernate: insert into join_nn (personid, addressid) values (?, ?)
一对一外键双向关联
一对一外键关联是一对多外键关联的特例,只是在多的一方加了个唯一性约束。
一、模型
一个人对应一个地址。
/*==============================================================*/
/* DBMS name: MySQL 5.0 */
/* Created on: 2008-12-9 0:12:54 */
/*==============================================================*/
drop table if exists address;
drop table if exists person;
/*==============================================================*/
/* Table: address */
/*==============================================================*/
create table address
(
id bigint not null auto_increment comment 'ID',
detail varchar(120) not null comment '详细地址',
personid bigint comment '人的ID',
primary key (id)
)
type = InnoDB;
alter table address comment '地址';
/*==============================================================*/
/* Table: person */
/*==============================================================*/
create table person
(
id bigint not null auto_increment comment 'ID',
name varchar(24) not null comment '姓名',
primary key (id)
)
type = InnoDB;
alter table person comment '人';
alter table address add constraint FK_Reference_4 foreign key (personid)
references person (id) on delete restrict on update restrict;
二、对象模型
public class Person implements java.io.Serializable {
private Long id;
private String name;
private Address address;
public class Address implements java.io.Serializable {
private Long id;
private Person person;
private String detail;
三、映射文件
<?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>
<class name="entity.Person" table="person">
<id name="id" type="java.lang.Long">
<column name="id" />
<generator class="identity" />
</id>
<property name="name" type="java.lang.String">
<column name="name" length="24" not-null="true">
<comment>姓名</comment>
</column>
</property>
<one-to-one name="address" cascade="all" />
</class>
</hibernate-mapping>
<?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>
<class name="entity.Address" table="address" catalog="testdb">
<id name="id" type="java.lang.Long">
<column name="id" />
<generator class="identity" />
</id>
<property name="detail" type="java.lang.String">
<column name="detail" length="120" not-null="true">
<comment>详细地址</comment>
</column>
</property>
<many-to-one name="person" class="entity.Person"
fetch="select" unique="true">
<column name="personid">
<comment>人的ID</comment>
</column>
</many-to-one>
</class>
</hibernate-mapping>
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="connection.username">root</property>
<property name="connection.url">
jdbc:mysql://localhost:3306/testdb
</property>
<property name="dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="connection.password">xiaohui</property>
<property name="connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<mapping resource="entity/Person.hbm.xml" />
<mapping resource="entity/Address.hbm.xml" />
</session-factory>
</hibernate-configuration>
四、测试
import org.hibernate.Transaction;
import entity.Address;
import entity.Person;
import utils.HibernateSessionFactory;
public class Test {
public static void main(String[] args) {
savePerson();
}
public static void savePerson() {
Person person = new Person("张三");
Address address = new Address("XX街X号");
person.setAddress(address);
address.setPerson(person);
Session session = HibernateSessionFactory.getSession();
Transaction tx = session.beginTransaction();
session.save(person);
tx.commit();
}
}
运行日志:
Hibernate:
insert
into
person
(name)
values
(?)
Hibernate:
insert
into
testdb.address
(detail, personid)
values
(?, ?)
一对一主键双向关联
一对一主键映射在一对一映射中还算是最为常用的。
一、模型
一个人Person 对应一个地址Address。
二、数据模型和对象模型图
导出建表SQL如下:
/*==============================================================*/
/* DBMS name: MySQL 5.0 */
/* Created on: 2008-12-8 23:05:32 */
/*==============================================================*/
drop table if exists address;
drop table if exists person;
/*==============================================================*/
/* Table: address */
/*==============================================================*/
create table address
(
id bigint not null comment 'ID',
detail varchar(120) not null comment '详细地址',
primary key (id)
)
type = InnoDB;
alter table address comment '地址';
/*==============================================================*/
/* Table: person */
/*==============================================================*/
create table person
(
id bigint not null auto_increment comment 'ID',
name varchar(24) not null comment '姓名',
primary key (id)
)
type = InnoDB;
alter table person comment '人';
alter table address add constraint FK_Reference_2 foreign key (id)
references person (id) on delete restrict on update restrict;
三、对象模型代码
public class Person implements java.io.Serializable {
private Long id;
private String name;
private Address address;
public class Address implements java.io.Serializable {
private Long id;
private Person person;
private String detail;
四、映射代码
<?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>
<class name="entity.Person" table="person">
<id name="id" type="java.lang.Long">
<column name="id" />
<generator class="identity" />
</id>
<property name="name" type="java.lang.String">
<column name="name" length="24" not-null="true">
<comment>姓名</comment>
</column>
</property>
<!-- cascade="all":在保存person对象的时候,级联保存person对象关联的address对象 -->
<one-to-one name="address" cascade="all" />
</class>
</hibernate-mapping>
<?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>
<class name="entity.Address" table="address" catalog="mydb">
<id name="id" type="java.lang.Long">
<column name="id" />
<!-- class="foreign": 一对一主键映射中,使用另外一个相关联的对象的标识符 -->
<generator class="foreign">
<param name="property">person</param>
</generator>
</id>
<property name="detail" type="java.lang.String">
<column name="detail" length="120" not-null="true">
<comment>详细地址</comment>
</column>
</property>
<!-- 表示在address表存在一个外键约束,外键参考相关联的表person -->
<one-to-one name="person" constrained="true" />
</class>
</hibernate-mapping>
五、Hibernate配置
<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<!-- Generated by MyEclipse Hibernate Tools. -->
<hibernate-configuration>
<session-factory>
<property name="connection.username">root</property>
<property name="connection.url">
jdbc:mysql://localhost:3306/mydb
</property>
<property name="dialect">
org.hibernate.dialect.MySQLDialect
</property>
<property name="connection.password">xiaohui</property>
<property name="connection.driver_class">
com.mysql.jdbc.Driver
</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<mapping resource="entity/Person.hbm.xml" />
<mapping resource="entity/Address.hbm.xml" />
</session-factory>
</hibernate-configuration>
测试很简单就不写了。
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;
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+----------------+
mysql> desc join_11tab_sx;
+-----------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------+---------+------+-----+---------+-------+
| addressid | int(11) | NO | UNI | | |
| personid | int(11) | NO | PRI | | |
+-----------+---------+------+-----+---------+-------+
mysql> desc address_11tab_sx;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
+---------------+--------------+------+-----+---------+----------------+
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>
<class name="com.lavasoft.sx._1_1_tab.Person11tab_sx" table="PERSON_11tab_sx">
<id name="personid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<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>
<class name="com.lavasoft.sx._1_1_tab.Address11tab_sx" table="ADDRESS_11tab_sx">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
<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 (?, ?)
一对多外键双向关联
一、模型介绍
一个人(Person)对应多个地址(Address)。
二、实体(省略getter、setter方法)
public class Person1nfk_sx implements Serializable {
private int personid;
private String name;
private int age;
private Set addresses=new HashSet();
public class Address1nfk_sx implements Serializable {
private int addressid;
private String addressdetail;
private Person1nfk_sx person1nfkSx;
三、表模型
mysql> desc person_1nfk_sx;
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+----------------+
mysql> desc address_1nfk_sx;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
| personid | int(11) | NO | MUL | | |
+---------------+--------------+------+-----+---------+----------------+
四、生成的SQL脚本
/* Formatted on 2007/08/22 17:42 (QP5 v5.50) */
CREATE TABLE `address_1nfk` (
`addressid` int(11) NOT NULL auto_increment,
`addressdetail` varchar(255) default NULL,
`personid` int(11) default NULL,
PRIMARY KEY (`addressid`),
KEY `FK9B93456DA6D6C1F5` (`personid`),
CONSTRAINT `FK9B93456DA6D6C1F5` FOREIGN KEY (`personid`) REFERENCES `person_1nfk` (`personid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
/* Formatted on 2007/08/22 17:42 (QP5 v5.50) */
CREATE TABLE `person_1nfk` (
`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;
五、映射方法
<hibernate-mapping>
<class name="com.lavasoft.sx._1_n_fk.Person1nfk_sx" table="PERSON_1nfk_sx">
<id name="personid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<!--映射集合属性,关联到持久化类-->
<set name="addresses" inverse="true" cascade="all">
<!--column用于指定外键列名-->
<key column="personid" not-null="true"/>
<!--映射关联类-->
<one-to-many class="com.lavasoft.sx._1_n_fk.Address1nfk_sx"/>
</set>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.sx._1_n_fk.Address1nfk_sx" table="ADDRESS_1nfk_sx">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
<!--映射关联属性,column属性指定外键列名-->
<many-to-one name="person1nfk"
class="com.lavasoft.sx._1_n_fk.Person1nfk_sx"
fetch="select"
cascade="save-update">
<column name="personid" not-null="true"/>
</many-to-one>
</class>
</hibernate-mapping>
六、测试方法
public class Test_1nfk_sx {
public static void main(String[] args){
Address1nfk_sx add1=new Address1nfk_sx();
Address1nfk_sx add2=new Address1nfk_sx();
Person1nfk_sx p=new Person1nfk_sx();
add1.setAddressdetail("郑州市经三路");
add2.setAddressdetail("合肥市宿州路");
p.setName("wang");
p.setAge(30);
p.getAddresses().add(add1);
p.getAddresses().add(add2);
add1.setPerson1nfk(p);
add2.setPerson1nfk(p);
Session session= HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(p);
session.saveOrUpdate(add1);
session.saveOrUpdate(add2);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存.
session.save(p);
session.saveOrUpdate(add1);
session.saveOrUpdate(add2);
Hibernate: insert into PERSON_1nfk_sx (name, age) values (?, ?)
Hibernate: insert into ADDRESS_1nfk_sx (addressdetail, personid) values (?, ?)
Hibernate: insert into ADDRESS_1nfk_sx (addressdetail, personid) values (?, ?)
一对多连接表双向关联
一、模型介绍
一个人(Person)对应多个地址(Address)。
二、实体(省略getter、setter方法)
public class Person1ntab_sx {
private int personid;
private String name;
private int age;
private Set addresses=new HashSet();
public class Address1ntab_sx {
private int addressid;
private String addressdetail;
private Person1ntab_sx person1ntab_sx;
三、表模型
mysql> desc person_1ntab_sx;
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+----------------+
mysql> desc address_1ntab_sx;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
+---------------+--------------+------+-----+---------+----------------+
mysql> desc join_1ntab_sx;
+-----------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------+---------+------+-----+---------+-------+
| addressid | int(11) | NO | PRI | | |
| personid | int(11) | NO | PRI | | |
+-----------+---------+------+-----+---------+-------+
四、生成的SQL脚本
/* Formatted on 2007/08/22 17:52 (QP5 v5.50) */
CREATE TABLE `address_1ntab_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 17:52 (QP5 v5.50) */
CREATE TABLE `person_1ntab_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 17:52 (QP5 v5.50) */
CREATE TABLE `join_1ntab_sx` (
`addressid` int(11) NOT NULL,
`personid` int(11) NOT NULL,
PRIMARY KEY (`personid`,`addressid`),
KEY `FK8F869F61F93DDD6` (`personid`),
KEY `FK8F869F61FC0F682A` (`addressid`),
CONSTRAINT `FK8F869F61FC0F682A` FOREIGN KEY (`addressid`) REFERENCES `address_1ntab_sx` (`addressid`),
CONSTRAINT `FK8F869F61F93DDD6` FOREIGN KEY (`personid`) REFERENCES `person_1ntab_sx` (`personid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
五、映射方法
<hibernate-mapping>
<class name="com.lavasoft.sx._1_n_tab.Person1ntab_sx" table="PERSON_1ntab_sx">
<id name="personid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<!--映射集合属性,关联到持久化类-->
<!--table="join_1ntab_sx"指定了连接表的名字-->
<set name="addresses"
table="join_1ntab_sx"
cascade="all">
<!--column="personid"指定连接表中关联当前实体类的列名-->
<key column="personid" not-null="true"/>
<!--unique="true"表示当前实体类是"1",不是"n"-->
<many-to-many column="addressid"
unique="true"
class="com.lavasoft.sx._1_n_tab.Address1ntab_sx"/>
</set>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.sx._1_n_tab.Address1ntab_sx"
table="ADDRESS_1ntab_sx">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
<!--映射关联属性,column属性指定外键列名-->
<join table="join_1ntab_sx"
inverse="true"
optional="true">
<key column="addressid"/>
<many-to-one name="person1ntab_sx"
column="personid"
cascade="all"
not-null="true"/>
</join>
</class>
</hibernate-mapping>
六、测试方法
public class Test_1ntab_sx {
public static void main(String[] args){
Address1ntab_sx add1=new Address1ntab_sx();
Address1ntab_sx add2=new Address1ntab_sx();
Person1ntab_sx p=new Person1ntab_sx();
add1.setAddressdetail("郑州市经三路");
add2.setAddressdetail("合肥市宿州路");
p.setName("wang");
p.setAge(30);
p.getAddresses().add(add1);
p.getAddresses().add(add2);
add1.setPerson1ntab_sx(p);
add2.setPerson1ntab_sx(p);
Session session= HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
// session.save(p);
session.saveOrUpdate(add1);
session.saveOrUpdate(add2);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存.
// session.save(p);
session.saveOrUpdate(add1);
session.saveOrUpdate(add2);
Hibernate: insert into PERSON_1ntab_sx (name, age) values (?, ?)
Hibernate: insert into ADDRESS_1ntab_sx (addressdetail) values (?)
Hibernate: insert into ADDRESS_1ntab_sx (addressdetail) values (?)
Hibernate: insert into join_1ntab_sx (personid, addressid) values (?, ?)
Hibernate: insert into join_1ntab_sx (personid, addressid) values (?, ?)
多对多双向关联
一、模型介绍
多个人(Person)对应多个地址(Address)。
一个人可对应多个地址,一个地址也可以对应多个人。
二、实体(省略getter、setter方法)
public class Personnn_sx {
private int personid;
private String name;
private int age;
private Set addresses=new HashSet();
public class Addressnn_sx {
private int addressid;
private String addressdetail;
private Set persons = new HashSet();
三、表模型
mysql> desc person_nn_sx;
+----------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+--------------+------+-----+---------+----------------+
| personid | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | YES | | NULL | |
| age | int(11) | YES | | NULL | |
+----------+--------------+------+-----+---------+----------------+
mysql> desc address_nn_sx;
+---------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+--------------+------+-----+---------+----------------+
| addressid | int(11) | NO | PRI | NULL | auto_increment |
| addressdetail | varchar(255) | YES | | NULL | |
+---------------+--------------+------+-----+---------+----------------+
mysql> desc join_nn_sx;
+-----------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------+---------+------+-----+---------+-------+
| addressid | int(11) | NO | PRI | | |
| personid | int(11) | NO | PRI | | |
+-----------+---------+------+-----+---------+-------+
四、生成的SQL脚本
/* Formatted on 2007/08/22 17:59 (QP5 v5.50) */
CREATE TABLE `address_nn_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 17:59 (QP5 v5.50) */
CREATE TABLE `person_nn_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 17:59 (QP5 v5.50) */
CREATE TABLE `join_nn_sx` (
`addressid` int(11) NOT NULL,
`personid` int(11) NOT NULL,
PRIMARY KEY (`personid`,`addressid`),
KEY `FK6EBBC5EF6C600921` (`personid`),
KEY `FK6EBBC5EF2A92FF3D` (`addressid`),
CONSTRAINT `FK6EBBC5EF2A92FF3D` FOREIGN KEY (`addressid`) REFERENCES `address_nn_sx` (`addressid`),
CONSTRAINT `FK6EBBC5EF6C600921` FOREIGN KEY (`personid`) REFERENCES `person_nn_sx` (`personid`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;
五、映射方法
<hibernate-mapping>
<class name="com.lavasoft.sx._n_n.Personnn_sx" table="PERSON_nn_sx">
<id name="personid">
<generator class="identity"/>
</id>
<property name="name"/>
<property name="age"/>
<!--映射集合属性,关联到持久化类-->
<!--table="join_1ntab_sx"指定了连接表的名字-->
<set name="addresses"
table="join_nn_sx"
cascade="all">
<!--column="personid"指定连接表中关联当前实体类的列名-->
<key column="personid" not-null="true"/>
<!--column="addressid"是连接表中关联本实体的外键-->
<many-to-many column="addressid"
class="com.lavasoft.sx._n_n.Addressnn_sx"/>
</set>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="com.lavasoft.sx._n_n.Addressnn_sx"
table="ADDRESS_nn_sx">
<id name="addressid">
<generator class="identity"/>
</id>
<property name="addressdetail"/>
<!--table="join_nn_sx"是双向多对多的连接表-->
<set name="persons"
inverse="true"
table="join_nn_sx">
<!--column="addressid"是连接表中关联本实体的外键-->
<key column="addressid"/>
<many-to-many column="personid"
class="com.lavasoft.sx._n_n.Personnn_sx"/>
</set>
</class>
</hibernate-mapping>
六、测试方法
public class Test_nn_sx {
public static void main(String[] args){
Addressnn_sx add1=new Addressnn_sx();
Addressnn_sx add2=new Addressnn_sx();
Personnn_sx p1=new Personnn_sx();
Personnn_sx p2=new Personnn_sx();
add1.setAddressdetail("郑州市经三路");
add2.setAddressdetail("合肥市宿州路");
p1.setName("wang");
p1.setAge(30);
p2.setName("zhang");
p2.setAge(22);
p1.getAddresses().add(add1);
p1.getAddresses().add(add2);
p2.getAddresses().add(add2);
add1.getPersons().add(p1);
add2.getPersons().add(p1);
add2.getPersons().add(p2);
Session session= HibernateUtil.getCurrentSession();
Transaction tx=session.beginTransaction();
session.save(p1);
session.save(p2);
// session.saveOrUpdate(add1);
// session.saveOrUpdate(add2);
tx.commit();
HibernateUtil.closeSession();
}
}
七、测试结果
1) :正常保存.
session.save(p1);
session.save(p2);
// session.saveOrUpdate(add1);
// session.saveOrUpdate(add2);
Hibernate: insert into PERSON_nn_sx (name, age) values (?, ?)
Hibernate: insert into ADDRESS_nn_sx (addressdetail) values (?)
Hibernate: insert into ADDRESS_nn_sx (addressdetail) values (?)
Hibernate: insert into PERSON_nn_sx (name, age) values (?, ?)
Hibernate: insert into join_nn_sx (personid, addressid) values (?, ?)
Hibernate: insert into join_nn_sx (personid, addressid) values (?, ?)
Hibernate: insert into join_nn_sx (personid, addressid) values (?, ?)
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