all gone

  <!-- local connection properties -->
  <property name="hibernate.connection.url">jdbc:mysql://localhost/test</property>
  <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
  <property name="hibernate.connection.username"></property>
  <property name="hibernate.connection.password"></property>
  <!-- property name="hibernate.connection.pool_size"></property -->

  <!-- dialect for MySQL -->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

        <property name="hibernate.show_sql">True</property>
        <property name="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
     <mapping resource="User.hbm.xml"/>

    </session-factory>
</hibernate-configuration>

User.hbm.xml

  <property
   name="Name"
   column="name"
   type="string"
   not-null="true"
   length="20"
  />
  <property
   name="Password"
   column="password"
   type="string"
   not-null="true"
   length="20"
  />
  <component name="Contact" class="Contact">
   <property
   name="Email"
   column="email"
   type="string"
   not-null="false"
   length="50"
  />
  <property
   name="Address"
   column="address"
   type="string"
   not-null="false"
   length="100"
  />
  </component>
  

 </class> 
</hibernate-mapping>

3.測(cè)試
添加一個(gè)測(cè)試類：HibernateTest

package com.user;

import java.util.List;
import java.util.ListIterator;

import org.hibernate.*;
import org.hibernate.cfg.*;

public class HibernateTest {
    public static void main(String[] args) throws HibernateException {
        SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();
       
        //
        //testInsert(sessionFactory);
       
        //
        testQuery(sessionFactory);
       
         
        sessionFactory.close();
       
    }
    public static void testInsert( SessionFactory sessionFactory )throws HibernateException {
     
      Session session = sessionFactory.openSession();
        Transaction tx= session.beginTransaction();
        User user = new User();
        Contact contact=new Contact();
        contact.setEmail("email");
        contact.setAddress("address");
       
        user.setName("caterpillar");
        user.setPassword("password");
        user.setContact(contact);
       
        session.save(user);
        tx.commit();
        session.close();
        System.out.println("OK！");
   }
   
    public static void testQuery( SessionFactory sessionFactory )throws HibernateException {
     
     Session session = sessionFactory.openSession();
        Transaction tx= session.beginTransaction();
        User user = new User();
        Contact contact=new Contact();
                 
        Query query=session.createQuery("from User as user");
        //query.setCharacter(1, 'M');
        List names =query.list();
        for(ListIterator it=names.listIterator();it.hasNext();){
           user= (User)it.next();
           System.out.println("Id: " + user.getId());
            System.out.println("name: " + user.getName());
            System.out.println("password: " + user.getPassword());
            if(user.getContact()!=null){
             
             if(user.getContact().getEmail()!=null){
              System.out.println("Email: " + user.getContact().getEmail());
             }
             if(user.getContact().getAddress()!=null){
              System.out.println("Address: " + user.getContact().getAddress());
               
             }
            }
           
           
           
        }
         
      
        tx.commit();
        session.close();
     
    }
}