IdCard.java类
public class IdCard {
private int id;
private String cardNo;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getCardNo() {
return cardNo;
}
public void setCardNo(String cardNo) {
this.cardNo = cardNo;
}
}
Person.java类
public class Person {
private int id;
private String name;
private IdCard idCard;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public IdCard getIdCard() {
return idCard;
}
public void setIdCard(IdCard idCard) {
this.idCard = idCard;
}
}
IdCard.hbm.xml映射文件
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.hibernate.IdCard" table="t_idCard">
<id name="id">
<generator class="native">
</generator>
</id>
<property name="cardNo"/>
</class>
</hibernate-mapping>
Person.hbm.xml映射文件
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.bjpowernode.hibernate.Person" table="t_person">
<id name="id">
<generator class="native">
<!-- property只关联对象 -->
<param name="property">idCard</param>
</generator>
</id>
<property name="name"/>
<many-to-one name="idCard" unique="true"/>
</class>
</hibernate-mapping>
hibernate.cfg.xml配置文件
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate_one2one_ufk</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.show_sql">true</property>
<mapping resource="com/hibernate/Person.hbm.xml"/>
<mapping resource="com/hibernate/IdCard.hbm.xml"/>
</session-factory>
</hibernate-configuration>
One2OneTest.java测试类(里面用到的工具类前面的博客中已经给出)
public void testSave1(){
Session session = null;
try{
session = HibernateUtils.getSession();
session.beginTransaction();
IdCard idCard = new IdCard();
idCard.setCardNo("1111111111111111111");
session.save(idCard);
Person person = new Person();
person.setName("张三");
person.setIdCard(idCard);
session.save(person);
session.getTransaction().commit();
}catch(Exception e){
e.printStackTrace();
session.getTransaction().rollback();
}finally{
HibernateUtils.closeSession(session);
}
}
测试结果(发出的sql语句):
Hibernate: insert into t_idCard (cardNo) values (?)
Hibernate: insert into t_person (name, idCard) values (?, ?)
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