1.在开发中，有的类信息比较复杂，而且某几个信息可以组成某一个部分，这个时候可以采用组件映射，组件映射是一张表映射到多个类。表结构

2.类的设计

Link.java

public class Link {    private String phone;    private String qq;    private String email;    private String address;    public Link() {    }        public Link(String phone, String qq, String email, String address) {        super();        this.phone = phone;        this.qq = qq;        this.email = email;        this.address = address;    }    public String getPhone() {        return phone;    }    public void setPhone(String phone) {        this.phone = phone;    }    public String getQq() {        return qq;    }    public void setQq(String qq) {        this.qq = qq;    }    public String getEmail() {        return email;    }    public void setEmail(String email) {        this.email = email;    }    public String getAddress() {        return address;    }    public void setAddress(String address) {        this.address = address;    }}

Person.java

public class Person {    private int id;    private String name;    private int age;    private Link link;    public Person() {    }        public Person(String name, int age, Link link) {        super();        this.name = name;        this.age = age;        this.link = link;    }    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 int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }    public Link getLink() {        return link;    }    public void setLink(Link link) {        this.link = link;    }    }

3.映射文件信息

4.测试

public class HibernateTest {    /**     * 生成数据库表的工具方法     * */    @Test    public void testCreateDB(){        Configuration cfg = new Configuration().configure();        SchemaExport se = new SchemaExport(cfg);        //第一个参数  是否打印sql脚本        //第二个参数 是否将脚本导出到数据库中执行        se.create(true, true);    }    /**     * 初始化表数据     */    @Test    public void testInit(){        Session session = null;        Transaction tx = null;        try {            session = HibernateUtil.getSession();            tx = session.beginTransaction();                        Link l1 = new Link("1324115534","345324","mike@qq.com","多伦多");            Link l2 = new Link("1345432367","675754","lily@qq.com","纽约");            Person p1 = new Person("mike",23,l1);            Person p2 = new Person("lily",40,l2);            session.save(p1);            session.save(p2);            tx.commit();                    } catch (Exception e) {            if(tx!=null)                tx.rollback();        }finally {            HibernateUtil.close();        }    }    /**     */    @Test    public void testGetData(){        Session session = HibernateUtil.getSession();        Person p1 = (Person)session.get(Person.class, 1);        System.out.println(p1);        HibernateUtil.close();    }}