<!DOCTYPE hibernate-configuration PUBLIC
 	"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 	"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
 <hibernate-configuration>
     <!-- 回话工厂 -->
     <session-factory>
         <!-- 配置jdbc的属性 -->
         <property name="hibernate.connection.driver_class">org.gjt.mm.mysql.Driver</property>
         <property name="hibernate.connection.url">jdbc:mysql://127.0.0.1:3306/hibernate</property>
         <property name="hibernate.connection.username">admin</property>
         <property name="hibernate.connection.password">123456</property>
         <!-- 方言 -->
         <property name="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</property>
         
         <!-- 映入实体映射文件 -->
         <mapping resource="com/hibernate/entity/User.hbm.xml"/>
     </session-factory>
 </hibernate-configuration>

 private static final long serialVersionUID = 1L;

 private int id;
 private String userName;
 private String password;
 private String address;
 private String tel;

 <!DOCTYPE hibernate-mapping PUBLIC 
     "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
     "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
 <hibernate-mapping>
     <!-- 指名该映射文件对应的实体类
     	table:数据库中对应的表的名称
      -->
     <class name="com.hibernate.entity.User" table="users">
         <!-- 标识主键的属性 -->
         <id name="id" column="id" type="int">
             <!-- 主键生成策略
             	identity:自增长
             	uuid：string类型的数据
              -->
             <generator class="identity"/>
         </id>
         <!-- 普通属性 -->
         <property name="userName" column="userName" length="20" type="string"/>
         <property name="password" column="password" length="20" type="string"/>
         <property name="address" column="address" length="20" type="string"/>
         <property name="tel" column="tel" length="20" type="string"/>
         <property name="number" column="number" type="string"/>
         <property name="note">
             <!-- 
             	column属性和colum节点不能同时使用
             	sql-teyp：数据库中的数据类型
              -->
             <column name="note" sql-type="varchar(600)"/>
         </property>
     </class>
 </hibernate-mapping>  

 //1、获取configuration对象
 Configuration configuration=new Configuration().configure();
 //2、获取sessionFactory对象
 SessionFactory sessionFactory = configuration.buildSessionFactory();
 //3、获取session对象
 Session session = sessionFactory.openSession();
 //4、开启事务
 Transaction tx = session.beginTransaction();
 Student student=new Student();
 student.setName("上");
 session.save(student);
 //5、提交事务
 tx.commit();
 //6、关闭资源
 session.close();
 sessionFactory.close();

 User user=new User();

 Session session = sessionFactory.openSession();
 //4、开启事务
 Transaction tx = session.beginTransaction();
 Student student=new Student();
 student.setName("张三");
 
 session.save(student);
 
 //执行update语句
 student.setName("李四");