<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"><!-- 组件映射-->
<hibernate-mapping package="loaderman.d_component"><class name="Car" table="t_car"><id name="id"><generator class="native"></generator></id>    <property name="name" length="20"></property><!-- 组件映射 --><component name="wheel"><property name="size"></property><property name="count"></property></component></class></hibernate-mapping>

package loaderman.d_component;import org.hibernate.Hibernate;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.classic.Session;
import org.junit.Test;public class App {private static SessionFactory sf;static {sf = new Configuration().configure().addClass(Car.class).buildSessionFactory();}@Testpublic void getSave() {Session session = sf.openSession();session.beginTransaction();// 轮子Wheel wheel = new Wheel();wheel.setSize(38);wheel.setCount(4);// 汽车Car car = new Car();car.setName("BMW");car.setWheel(wheel);// 保存
        session.save(car);session.getTransaction().commit();session.close();}}

package loaderman.d_component;public class Car {private int id;private String name;// 车轮private Wheel wheel;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 Wheel getWheel() {return wheel;}public void setWheel(Wheel wheel) {this.wheel = wheel;}}

package loaderman.d_component;
// 车轮
public class Wheel {private int count;private int size;public int getCount() {return count;}public void setCount(int count) {this.count = count;}public int getSize() {return size;}public void setSize(int size) {this.size = size;}}