第一个hibernate程序链接mysql hibernate4.0

注意目录结构：

package com.kinsey.hibernate.helloworld;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.boot.registry.StandardServiceRegistryBuilder;import org.hibernate.cfg.Configuration;import org.hibernate.service.ServiceRegistry;public class HibernateTest {public static void main(String[] args) {//创建一个SessionFactory 对象SessionFactory sessionFactory  = null;Configuration configuration = new Configuration().configure();configuration.configure();configuration.addClass(News.class);ServiceRegistry serviceRegistry =  new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build(); sessionFactory  =configuration.buildSessionFactory(serviceRegistry);Session session=sessionFactory.openSession();News news  = new News("JAVA", "Liaoxuefeng");session.save(news);session.beginTransaction().commit();;session.close();sessionFactory.close();}}

package com.kinsey.hibernate.helloworld;public class News {private Integer id;private String title;private String author;public News(String title, String author) {super();this.title = title;this.author = author;}public News() {super();}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public String getAuthor() {return author;}public void setAuthor(String author) {this.author = author;}}

<?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>    <!-- 配置数据库连接的基本信息 -->    <property name="hibernate.connection.username">root</property>    <property name="hibernate.connection.password">123456</property>    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate5</property>        <!-- 配置hibernate基本信息 -->    <!-- 配置hibernate所使用的方言 -->    <property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect    </property>        <!-- 操作时是否在控制台打印SQL  -->    <property name="hibernate.show_sql">true</property>        <!-- 是否格式化SQL语句 -->    <property name="hibernate.format_sql">true</property>        <!-- 指定生成数据表的策略 -->    <property name="hibernate.hbm2ddl.auto">update</property>        <!-- 指定关联的.hbm.xml文件 --><mapping resource="com/kinsey/hibernate/helloworld/News.hbm.xml" />        </session-factory>        </hibernate-configuration>

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><!-- Generated 2016-8-26 19:49:09 by Hibernate Tools 3.5.0.Final --><hibernate-mapping>    <class name="com.kinsey.hibernate.helloworld.News" table="NEWS">        <id name="id" type="java.lang.Integer">            <column name="ID" />            <generator class="increment" />        </id>                <property name="title" type="java.lang.String">            <column name="TITLE" />        </property>                <property name="author" type="java.lang.String">            <column name="AUTHOR" />        </property>            </class></hibernate-mapping>

存在的问题：

一开始看视频：

视频中ServiceRegistry建立方式与下面不一样，一直报错上网查说hibernate5.x 不支持ServiceRegistryBuilder。

后在网上查资料修改之。不能太相信视频。

ServiceRegistry serviceRegistry =  new StandardServiceRegistryBuilder().applySettings(configuration.getProperties())

在配置ID主键时，选取assgined居然报错，然后改为increment，后面需要研究研究，怎么回事。

第一次运行，提示数据库没有news表，感到奇怪，后来手动在数据库中见表的。