继承映射方式一:一个子类一张表 ,一张表对应一个配置文件
场景:父类person,子类student、teacher
Person.java
package com.fgh.hibernate;
public class Person {
private String id;
private String name;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Student.java
package com.fgh.hibernate;
public class Student extends Person {
private String cardId;
public String getCardId() {
return cardId;
}
public void setCardId(String cardId) {
this.cardId = cardId;
}
}
Teacher.java
package com.fgh.hibernate;
public class Teacher extends Person {
private int salary;
public int getSalary() {
return salary;
}
public void setSalary(int salary) {
this.salary = salary;
}
}
Student.hbm.xml
<?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.fgh.hibernate.Student" table="student_extend">
<id name="id" column="id" type="string">
<generator class="uuid"></generator>
</id>
<property name="name" column="name" type="string"></property>
<property name="cardId" type="string"></property>
</class>
</hibernate-mapping>
Teacher.hbm.xml
<?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.fgh.hibernate.Teacher" table="teacher_extend">
<id name="id" column="id" type="string">
<generator class="uuid"></generator>
</id>
<property name="name" type="string"></property>
<property name="salary" type="int"></property>
</class>
</hibernate-mapping>
测试类:
package com.fgh.hibernate;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
public class ExtendMappingTest {
private static SessionFactory sessionFactory;
static {
try {
sessionFactory = new Configuration().configure()
.buildSessionFactory();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
Session session = sessionFactory.openSession();
Transaction tx = null;
try {
tx = session.beginTransaction();
Student student = new Student();
student.setName("zhangsan");
student.setCardId("213421342");
Teacher teacher = new Teacher();
teacher.setName("lilaoshi");
teacher.setSalary(4000);
session.save(student);
session.save(teacher);
tx.commit();
} catch (Exception e) {
e.printStackTrace();
if (null != tx) {
tx.rollback();
}
} finally {
session.close();
}
}
}