Hibernate基本演示

保存一个对象到数据库中

目录结构

hibernate.cfg.xml

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

<hibernate-configuration>
    <session-factory>
        <!--数据库连接信息-->
        <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/Lesson7_Hibernate3_Demo1</property>
        <property name="connection.username">root</property>
        <property name="connection.password">123456</property>
        <!--方言-->
        <property name="dialect">org.hibernate.dialect.MySQLDialect</property>

        <!--参数信息-->
        <!--显示sql-->
        <property name="show_sql">true</property>
        <!--如果没有表 自动创建-->
        <property name="hbm2ddl.auto">create</property>
       <!-- <property name="c3p0.max_size">100</property>
        <property name="c3p0.min_size">10</property>
        <property name="cache.use_second_level_cache">true</property>
        <property name="cache.use_query_cache">true</property>
        <property name="cache.provider_class">org.hibernate.cache.OSCacheProvider</property>

        <property name="generate_statistics">true</property>-->

        <!--
        <class-cache class="cn.itcast.hibernate.domain.User" usage="read-only"/>
        -->

        <!--映射文件-->
        <mapping resource="org/zln/hibernate/domain/hbm/User.hbm.xml"/>

    </session-factory>
</hibernate-configuration>

HibernateUtils.java

package org.zln.hibernate.utils;

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

/**
 * Created by coolkid on 2015/6/14 0014.
 */
public class HibernateUtils {
    private static Configuration configuration = new Configuration();
    private static SessionFactory sessionFactory;
    private static final String PATH = "hibernate.cfg.xml";
    static {
        configuration.configure(PATH);
    }
    public static Session getSession(){
        sessionFactory = configuration.buildSessionFactory();
        return sessionFactory.openSession();
    }
}

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 package="org.zln.hibernate.domain">

    <class name="User">
        <id name="id">
            <generator class="native"/>
        </id>
        <property name="name"/>
        <property name="birthday"/>
    </class>

</hibernate-mapping>

UserDao.java

package org.zln.hibernate.dao;

import org.hibernate.Session;
import org.hibernate.Transaction;
import org.zln.hibernate.domain.User;
import org.zln.hibernate.utils.HibernateUtils;

/**
 * Created by coolkid on 2015/6/14 0014.
 */
public class UserDao {

    public void saveUser(User user){
        Session session = HibernateUtils.getSession();
        Transaction transaction = session.beginTransaction();
        try {
            session.save(user);
            session.flush();
            transaction.commit();
        }finally {
            session.close();
        }
    }
}