实体：
package uni.many2one.jointable;
public class Parent {
private int id;
private String name;
private Child child;
public Parent() {
}
public Parent(int id, String name, Child child) {
super();
this.id = id;
this.name = name;
this.child = child;
}
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 Child getChild() {
return child;
}
public void setChild(Child child) {
this.child = child;
}
}
package uni.many2one.jointable;
public class Child {
private int id;
private String name;
public Child(int id, String name) {
super();
this.id = id;
this.name = name;
}
public Child() {
}
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;
}
}
hm配置文件：
<hibernate-mapping>
<!-- <class name="org.hibernate.wk.Student" dynamic-insert="true" dynamic-update="true"> -->
<class name="uni.many2one.jointable.Parent">
<id name="id" column="did">
<generator class="native" />
</id>
<property name="name" type="string" column="name"></property>
<join table="parentchild">
<key column="did"></key>
<many-to-one name="child" column="cid" not-null="true"></many-to-one>
</join>
</class>
</hibernate-mapping>
<hibernate-mapping>
<class name="uni.many2one.jointable.Child">
<id name="id" column="id">
<generator class="native" />
</id>
<property name="name" type="string" column="name"></property>
</class>
</hibernate-mapping>
测试文件：
public class Test {
@org.junit.Test
public void testAdd() {
SessionFactory sf = HibernateUtil.getSessionFactory();
Session session = sf.getCurrentSession();
session.beginTransaction();
Child c1 = new Child();
c1.setName("child1");
Parent mother = new Parent();
mother.setName("Mother");
mother.setChild(c1);
Parent father = new Parent();
father.setName("Daddy");
father.setChild(c1);
session.save(c1);
session.save(mother);
session.save(father);
session.beginTransaction().commit();
}
}
测测试结果：
Hibernate: insert into Child (name) values (?)
Hibernate: insert into Parent (name) values (?)
Hibernate: insert into parentchild (cid, did) values (?, ?)
Hibernate: insert into Parent (name) values (?)
Hibernate: insert into parentchild (cid, did) values (?, ?)