一、数据库的建立（使用MySQL）

create database if not exists `sampledb`;

use `sampledb`;

/*table structure for table `sampledb`.`personinfo` */

drop table if exists `sampledb`.`room`;

create table room (

 room_id int not null auto_increment,

 address varchar(32) not null default '',

 primary key (room_id)

) type=innodb;

create database if not exists `sampledb`;

use `sampledb`;

/*table structure for table `sampledb`.`personinfo` */

drop table if exists `sampledb`.`user`;

create table user (

 user_id int not null auto_increment,

 name varchar(16) not null default '',

 room_id int not null,

 index (room_id),

 foreign key (room_id) references room(room_id),

 primary key (user_id)

) type=innodb;

二、User.java

package com.tanm.test;

publicclass User {

    privatelongid;

    private String name;

    private Room room;

    publiclong getId() {

       returnid;

    }

    publicvoid setId(long id) {

       this.id = id;

    }

    public String getName() {

       returnname;

    }

    publicvoid setName(String name) {

       this.name = name;

    }

    public Room getRoom() {

       returnroom;

    }

    publicvoid setRoom(Room room) {

       this.room = room;

    }

}

三、User.hbm.xml

<?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="com.tanm.test.User" table="user">

    <id name="id" column="user_id" type="long">

      <generator class="increment"/>

    </id>

    <property name="name" column="name" type="string" not-null="true" />

    <many-to-one name="room" column="room_id" class="com.tanm.test.Room" />

 </class>

</hibernate-mapping>

四、Room.java

package com.tanm.test;

import java.util.HashSet;

import java.util.Set;

publicclass Room {

    privatelongid;

    private String address;

    private Set users = new HashSet();

    public String getAddress() {

       returnaddress;

    }

    publicvoid setAddress(String address) {

       this.address = address;

    }

    publiclong getId() {

       returnid;

    }

    publicvoid setId(long id) {

       this.id = id;

    }

    public Set getUsers() {

       returnusers;

    }

    publicvoid setUsers(Set users) {

       this.users = users;

    }

}

五、Room.hbm.xml

<?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="com.tanm.test.Room" table="room">

    <id name="id" column="room_id" unsaved-value="0">

      <generator class="increment"/>

    </id>

    <property name="address" column="address" type="string" not-null="true" />

    <set name="users" table="user" inverse="true" cascade="all">

       <key column="room_id"/>

       <one-to-many class="com.tanm.test.User"/>

    </set>

 </class>

</hibernate-mapping>

六、Test.java

package com.tanm.test;

import org.hibernate.*;

import org.hibernate.cfg.*;

publicclass Test {

    publicstaticvoid main(String[] args) throws HibernateException {

       SessionFactory sessionFactory = new Configuration().configure()

              .buildSessionFactory();

       Room room = new Room();

       room.setAddress("China_xi'an");

       User user1 = new User();

       user1.setName("111");

       User user2 = new User();

       user2.setName("222");

       user1.setRoom(room);

       user2.setRoom(room);

       room.getUsers().add(user1);

       room.getUsers().add(user2);

       Session session = sessionFactory.openSession();

       Transaction tx = session.beginTransaction();

       session.save(room);

       tx.commit();

       session.close();

       sessionFactory.close();

    }

}

成功运行后的结果：

Hibernate: insert into room (address, room_id) values (?, ?)

Hibernate: insert into user (name, room_id, user_id) values (?, ?, ?)

Hibernate: insert into user (name, room_id, user_id) values (?, ?, ?)