1、创建实体类

public class User {
    private int uid;
    private String username;
    private String password;
    private String address;
//省略get和set方法
}

2、创建实体类配置文件

该配置文件命名规范是实体类名+hbm.xml
该文件存放的位置是任意的，

<?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.winney.entiity.User" table="t_user">
        <id name="uid" column="uid">
            <!-- 该id作为主键并且自增加1 -->
            <generator class="native"></generator>
        </id>
        <property name="username" column="username"></property>
        <property name="password" column="password"></property>
        <property name="address" column="address"></property>
    </class>
</hibernate-mapping>

3、创建核心配置文件

主要是配置数据库信息、配置hibernate信息以及实体类配置文件的配置
该文件的命名是固定的：hibernate.cfg.xml，文件的路径是固定放在src下：

<?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>
        <!-- 配置数据库信息 -->
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql:///hibernate_db</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.connection.password">root</property>
        <!-- 配置hibernate信息 -->
        <property name="hibernate.show_sql">true</property>
        <property name="hibernare.format_sql">true</property>
        <property name="hibernate.hbm2ddl.auto">update</property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
        <!-- 把映射文件放到核心配置文件中 -->
        <mapping resource="com/winney/entiity/user.hbm.xml"/>
    </session-factory>
</hibernate-configuration>

4、实现过程：

图片.png

package com.winney.hibernateTest;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.junit.Test;

import com.winney.entiity.User;

public class UserTest {
    @Test
    public void testAdd() {
        // 1、加载hibernate核心文件
        Configuration cfg = new Configuration();
        cfg.configure();
        // 2、创建SessionFactory对象
        SessionFactory sessionFactory = cfg.buildSessionFactory();
        //3、创建session
        Session session = sessionFactory.openSession();
        // 4、开启事务
        Transaction ts = session.beginTransaction();
        // 5、进行crud操作
        User user = new User();
        user.setUsername("wuzilong");
        user.setPassword("123456");
        user.setAddress("GZ");
        session.save(user);
        // 6、提交事务
        ts.commit();
        // 7、关闭资源
        session.close();
        sessionFactory.close();
    }
}