Java_Web三大框架之Hibernate配置文件（二）

<!DOCTYPE hibernate-configuration PUBLIC
    "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
    <session-factory name="foo">
        <!-- 数据库方言 -->
        <property name="dialect">
            org.hibernate.dialect.OracleDialect
        </property>
        <!-- 连接数据库Url -->
        <property name="hibernate.connection.url">
            jdbc:oracle:thin:@localhost:1521:orcl
        </property>
        <!-- 连接驱动 -->
        <property name="hibernate.connection.driver_class">
            oracle.jdbc.driver.OracleDriver
        </property>
        <!-- 用户名 -->
        <property name="hibernate.connection.username">epet</property>
        <!-- 密码 -->
        <property name="hibernate.connection.password">123456</property>
        
        <!-- 自动创建数据库表格 -->
        <property name="hibernate.hbm2ddl.auto">update</property>
        
        <!-- 配置映射信息 -->
        <mapping resource="com/msit/hibernate/entity/User.hbm.xml" />
        
    </session-factory>
</hibernate-configuration>

注：
<session-factory>
    <!--省略其他配置-->
    <!--注意配置文件名必须包含其相对于classpath 的全路径-->
    <mapping resource="cn/jbit/houserent/entity/User.hbm.xml" />
</session-factory>

package com.msit.hibernate.HibernateUtil;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
    
    private HibernateUtil(){
        
    };
    
    public static SessionFactory SessionFactory = null;
    
    static{
        //hibernate初始化
        Configuration cf = new Configuration();
        cf.configure();
        SessionFactory = cf.buildSessionFactory();//DriverManager.getconnection()
        //Session session = SessionFactory.openSession();//相当于得到Connection对象
    }
    
    public static Session getSession(){
        
        return SessionFactory.openSession();
    }
    
    public static void closeSession(Session session){
        if(session!=null){
            session.clear();
        }
    }

}

package com.msit.hibernate.test;

import java.sql.DriverManager;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

import com.msit.hibernate.HibernateUtil.HibernateUtil;
import com.msit.hibernate.entity.User;

public class HibernateTest {

    /**
     * @param args
     */
    public static void main(String[] args) {
        
        
        
        //创建用户
        User user = new User();
        user.setId(1);
        user.setUsername("master123456");
        user.setPassword("123");
        
        Session session = HibernateUtil.getSession();
        
        //进行事务处理
        Transaction Transaction = session.beginTransaction();
        
        try {
            
            //对数据做保存至数据库
            session.update(user);
            
            //提交事务
            Transaction.commit();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            //如果出现异常则进行事务回滚
            Transaction.rollback();
        }
    }
}