创建一个hibernate helloword

1、下载hibernate包

http://hibernate.org/orm/

点download下载最终版

安装hibernate插件hibernatetools

2、创建一个java工程

导入必须的jar包

D:\projects\hibernate-release-5.2.3.Final\lib\required

3、创建一个测试数据库

4、编写hibernate数据库连接配置和使用配置

 

<?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>
		<!-- 连接数据库的基本信息 -->
		<property name="connection.username">root</property>
		<property name="connection.password">root</property>
		<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="connection.url">jdbc:mysql://127.0.0.1:3306/hibernate?useUnicode=true&characterEncoding=UTF-8</property>
		
		<!--配置hibernate的基本信息 -->
		<property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property>
		<property name="show_sql">true</property>
		<property name="format_sql">true</property>
		<property name="hbm2ddl.auto">update</property>
		
<!-- 		指定关联的配置文件 -->
		<mapping resource="com/hy/News.hbm.xml"/>
	</session-factory>
</hibernate-configuration>

 

5、编写一个简单的实体bean

 

package com.hy;

import java.sql.Date;

public class News {
	private Integer id;
	private String title;
	private String content;
	private String author;
	private Date createdate;
	
	
	public News() {
		
	}
	
	
	
	
	public News(String title, String content, String author, Date createdate) {
		super();
		this.title = title;
		this.content = content;
		this.author = author;
		this.createdate = createdate;
	}




	public Date getCreatedate() {
		return createdate;
	}




	public void setCreatedate(Date createdate) {
		this.createdate = createdate;
	}




	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 getContent() {
		return content;
	}
	public void setContent(String content) {
		this.content = content;
	}
	public String getAuthor() {
		return author;
	}
	public void setAuthor(String author) {
		this.author = author;
	}
	
	
	
	
	
	
}

6、编写一个测试类

 

 

package com.hy;

import java.sql.Date;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.junit.Test;

public class HibernateTest {

	@Test
	public void test() {
		
		Configuration configuration = new Configuration().configure("hibernate.cfg.xml");
		SessionFactory sessionFactory = null;
		
		//ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
		sessionFactory = configuration.buildSessionFactory();
		
		Session session = sessionFactory.openSession();
		
		Transaction transaction = session.beginTransaction();
		
		News news = new News("java", "java学习方法大全", "小米", new Date(new java.util.Date().getTime()));
		//News news = new News("java", "java123", "wh", new Date(new java.util.Date().getTime()));
		
		session.save(news);
		
		transaction.commit();
		
		session.close();
		
		sessionFactory.close();
		
	}

}
;

注意的点：

 

1、数据库编码必须都是utf8 否则保存中文有问题 修改my.ini文件 设置数据库和表的编码都是utf8

2、配置方言的时候要注意你的mysql版本 5.0以上用org.hibernate.dialect.MySQL5InnoDBDialect，5以下用org.hibernate.dialect.MySQLInnoDBDialect否则生成表有问题，如：type=innodb 或 engine=innodb的问题

3、创建sessionFactory的时候有部分版本要用serviceRegistry ，部分版本不用，否则会报错找不到entity