First Hibernate

flywing0927

1、新建java项目

2、创建User Library,加入如下jar
* HIBERNATE_HOME/hibernate3.jar
* HIBERNATE_HOME/lib/*.jar
* MySql jdbc驱动

3、创建hibernate配置文件hibernate.cfg.xml，为了便于调试最好加入log4j配置文件

hibernate.cfg.xml



  jdbc:mysql://localhost/hibernate_first
  com.mysql.jdbc.Driver
  root
  bjsxt
  org.hibernate.dialect.MySQLDialect
  true
  
  


4、定义实体类

import java.util.Date;

public class User {

private String id;

private String name;

private String password;

private Date createTime;

private Date expireTime;

public String getId() {
  return id;
}

public void setId(String id) {
  this.id = id;
}

public String getName() {
  return name;
}

public void setName(String name) {
  this.name = name;
}

public String getPassword() {
  return password;
}

public void setPassword(String password) {
  this.password = password;
}

public Date getCreateTime() {
  return createTime;
}

public void setCreateTime(Date createTime) {
  this.createTime = createTime;
}

public Date getExpireTime() {
  return expireTime;
}

public void setExpireTime(Date expireTime) {
  this.expireTime = expireTime;
}
}
5、定义User类的映射文件User.hbm.xml


  
   
  
  
  
  
  


6、将User.hbml.xml文件加入到hibernate.cfg.xml文件中

   

7、编写hbm2ddl工具类，将实体类生成数据库表

import org.hibernate.cfg.Configuration;
import org.hibernate.tool.hbm2ddl.SchemaExport;

public class ExportDB {

public static void main(String[] args) {
  
  //读取hibernate.cfg.xml文件
  Configuration cfg = new Configuration().configure();
  
  SchemaExport export = new SchemaExport(cfg);
  
  export.create(true, true);
}
}

8、开发客户端

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

public class Client {

public static void main(String[] args) {
  
  //读取hibernate.cfg.xml文件
  Configuration cfg = new Configuration().configure();
  
  //创建SessionFactory
  SessionFactory factory = cfg.buildSessionFactory();
  
  Session session = null;
  try {
   session = factory.openSession();
   
   //开启事务
   session.beginTransaction();
   
   User user = new User();
   user.setName("张三");
   user.setPassword("123");
   user.setCreateTime(new Date());
   user.setExpireTime(new Date());
   
   //保存数据
   session.save(user);
   
   //提交事务
   session.getTransaction().commit();
  }catch(Exception e) {
   e.printStackTrace();
   //回滚事务
   session.getTransaction().rollback();
  }finally {
   if (session != null) {
    if (session.isOpen()) {
     //关闭session
     session.close();
    }
   }
  }
  
}
}

本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u2/68060/showart_1934135.html