组件映射

组件映射：Group类的描写
User类是一个组件

package com.anryn;

public class Group {

	private int id ;
	private String address ;
	private User user ;

	public Group() {
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}

	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}
}

User类：

package com.anryn;

import java.util.Date;

public class User {

	private int id ;
	private String useName ;

	private Date date ;

    public User() {
    }
	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getUseName() {
		return useName;
	}

	public void setUseName(String useName) {
		this.useName = useName;
	}

	public Date getDate() {
		return date;
	}

	public void setDate(Date date) {
		this.date = date;
	}
}

配置文件Group.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 package="com.anryn">
 <class name="Group" table="_Group">
    <!--hibernate为我们生成主键id-->
 	<id name="id">
 		<generator class="native"/>
 	</id>
 	<property name="address"/>
 	<component name="user" class="User">
      	<property name="id" column="User_Id"/>
      	<property name="useName"/>
      	<property name="date"/>
 	</component>
 </class>
</hibernate-mapping>

配置文件User.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 package="com.anryn">
<class name="User" table="User">
	<id name="id">
        <generator class="native"/>
    </id>
    <property name="useName"/>
    <property name="date"/>
</class>

</hibernate-mapping>

测试代码：

package com.anryn;
import java.util.Date;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class UserTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		User user = new User() ;

		user.setUseName("anryn") ;
		user.setDate(new Date()) ;
		Group group = new Group() ;
		group.setAddress("武汉市");
		group.setUser(user) ;
		//getSession
		SessionFactory sf = new Configuration().configure().buildSessionFactory() ;
		Session session = sf.getCurrentSession() ;

		session.beginTransaction() ;
		session.save(user) ;
		session.save(group) ;

		session.getTransaction().commit() ;
		sf.close() ;
	}
}