Hibernate之一环境搭建

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 

4、定义实体类 

5、定义User类的映射文件User.hbm.xml 

6、开发客户端(编写测试类) 

hibernate.cfg.xml 

<?xml version='1.0' encoding='UTF-8'?> 
<!DOCTYPE hibernate-configuration PUBLIC 
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> 
<hibernate-configuration> 
    <session-factory> 
    <!-- 方言 --> 
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property> 
        <!-- 数据库连接 --> 
        <property name="connection.url">jdbc:mysql://localhost:3306/数据库名称</property> 
        <!-- 数据库连接用户名 --> 
        <property name="connection.username">root</property> 
        <!-- 数据库连接密码 --> 
        <property name="connection.password">root</property> 
        <!-- 数据库驱动 --> 
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property> 
        <!-- 打印SQL语句 --> 
        <property name="show_sql">true</property> 
        <!-- 自动建表 --> 
        <property name="hibernate.hbm2ddl.auto">update</property> 
        <!-- 映射文件 --> 
        <mapping resource="com/tgb/User.hbm.xml"/> 
    </session-factory> 
</hibernate-configuration> 

实体类 User.java 

package com.tgb.hibernate; 

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; 
} 
} 

映射文件 User.hbm.xml 

<?xml version="1.0"?> 
<!DOCTYPE hibernate-mapping PUBLIC 
"-//Hibernate/Hibernate Mapping DTD 3.0//EN" 
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> 
<hibernate-mapping> 
<class name="com.tgb.hibernate.User"> 
<id name="id"> 
<generator class="uuid"/> 
</id> 
<property name="name"/> 
<property name="password"/> 
<property name="createTime"/> 
<property name="expireTime"/> 
</class> 
</hibernate-mapping> 

编写测试类 Client.java 

package com.tgb.hibernate; 

import java.util.Date; 

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(); 
} 
} 
} 
} 
}