hibernate联合主键

chengyue2007

2008-09-16 08:55<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >

<hibernate-mapping package="classweb.model.po">
<class
   name="Users"
   table="USERS"
>
   <meta attribute="sync-DAO">false</meta>
   <composite-id name="id" class="UsersPK">
    <key-property
     name="name"
     column="NAME"
     type="string"
    />
    <key-property
     name="tel"
     column="TEL"
     type="string"
    />
   </composite-id>

   <property
    name="age"
    column="AGE"
    type="string"
    not-null="false"
   />
  
</class>
</hibernate-mapping>

以下代码生成一个Users对象，并保存．    Session s = HibernateUtil.currentSession();    Transaction t = s.beginTransaction();    UsersPK usersPK = new UsersPK();    usersPK.setName(1);    usersPK.setTel(4);    Users user = new Users();    user.setAge("19");    user.setId(usersPK );    s.save(user);    t.commit();    HibernateUtil.closeSession();    System.out.println("insert success!");更新．    Session s = HibernateUtil.currentSession();    Transaction t = s.beginTransaction();    UsersPK usersPK = new UsersPK();    usersPK.setDbid(1);    usersPK.setRowUID(4);    Users user = (Users)s.load(Users.class, usersPK);    user.setAge("20");    s.update(user);    t.commit();    HibernateUtil.closeSession();    System.out.println("update success!");删除．Session s = HibernateUtil.currentSession();    Transaction t = s.beginTransaction();    UsersPK usersPK = new UsersPK();    usersPK.setDbid(1);    usersPK.setRowUID(4);    Users user = (Users)s.load(Users.class, usersPK);    s.delete(user);    t.commit();    HibernateUtil.closeSession();    System.out.println("delete success!");最后讲select如果对复合主键中的一个主键进行查询，必须    Session s = HibernateUtil.currentSession();    Criteria c = s.createCriteria(Users.class);    c.add(Restrictions.eq("id.name", "levi"));    List list = c.list();    Iterator iter = list.iterator();    while (iter.hasNext()) {      Users item = (Users) iter.next();      System.out.println("name:" + item.getId().getName());      System.out.println("tel;" + item.getId().getTel());      System.out.println("age:" + item.getAge());    }    HibernateUtil.closeSession();    System.out.println("select success!");

这样的查询都出来了，其它的查询自己考虑吧