hibernate入门1

1创建java工程

2导包并add build path

3实体类 User

package com.itcast.a_1;public class User {private Integer id;private String username;private String password;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}

4建数据库表

use zn ;DROP TABLE IF EXISTS `STU`;  CREATE TABLE `STU` (    `id` int(11) NOT NULL AUTO_INCREMENT,    `username` varchar(20) NOT NULL,    `password`  varchar(30),    PRIMARY KEY (`id`)  ) ENGINE=MyISAM  DEFAULT CHARSET=utf8;  desc stuselect * from stu

5核心配置文件

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-configuration PUBLIC"-//Hibernate/Hibernate Configuration DTD 3.0//EN""http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"><hibernate-configuration><session-factory ><property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property><property name="hibernate.connection.url">jdbc:mysql:///zn</property><property name="hibernate.connection.username">root</property><property name="hibernate.connection.password">123456</property><property name="show_sql">true</property><property name=""></property><mapping resource="com/itcast/a_1/User.hbm.xml"/></session-factory></hibernate-configuration>

6mapping配置文件

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping PUBLIC     "-//Hibernate/Hibernate Mapping DTD 3.0//EN"    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">    <hibernate-mapping><class name="com.itcast.a_1.User" table="stu"><!-- 主键 --><id name="id"><!-- 固定值：主键生成策略 --><generator class="native"></generator></id><!-- 普通属性 --><property name="username"></property><property name="password"></property></class></hibernate-mapping>

7测试

package com.itcast.a_1;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;import org.junit.Test;public class UserTest {@Testpublic void demo1(){User user = new User();user.setUsername("li");user.setPassword("123124");//1 加载配置文件获得核心配置对象Configuration config = new Configuration().configure();//2 获得工厂 SessionFactory，相当于连接池SessionFactory factory = config.buildSessionFactory();//3获得会话session，相当于链接ConnectionSession session = factory.openSession();//4 开启事务Transaction transaction = session.beginTransaction();//操作session.save(user);//5 提交事务 | 回滚事务transaction.commit();//6 释放资源--关闭sessionsession.close();//7 释放资源--关闭工厂factoryfactory.close();}}

8 查看数据库更改成功