Hibernate(03)-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_42217331/article/details/84202417

本文详细介绍Hibernate ORM框架的使用步骤，包括持久化类的创建、对象关系映射文件配置、Hibernate.cfg.xml设置及通过API访问数据库的示例代码，是初学者快速上手Hibernate的理想指南。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Hibernate 开发步骤：

1. 创建持久化类

package com.huawei.hibernate;

public class News {
	
	private Integer id;
	private String title;
	private String content;
	
	
	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;
	}
	@Override
	public String toString() {
		return "News [id=" + id + ", title=" + title + ", content=" + content + "]";
	}
}

2. 创建对象-关系映射文件

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
	"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
	"http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.huawei.hibernate">
	<class name="News" table="NEWS_TABLE">

		<id name="id" column="NEWS_ID">
			<generator class="native"></generator>
		</id>
		
		<property name="title" column="TITLE"></property>
		<property name="content" column="CONTENT"></property>
	</class>
</hibernate-mapping>

3.创建Hibernate.cfg.xml 配置文件

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

<hibernate-configuration>
	
	<!-- 配置 session-factory 节点 -->
	<session-factory>
	
		<!-- 连接数据库的基本信息: user, password, url, driverClass -->
		<property name="connection.username">root</property>
		<property name="connection.password">nssol001</property>
		<property name="connection.url">jdbc:mysql:///hibernate</property>
		<property name="connection.driver_class">com.mysql.jdbc.Driver</property>

		<!-- 配置数据库方言 -->
		<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
	
		<!-- 在进行数据库相关操作时, 是否在控制台打印 SQL 代码 -->
		<property name="show_sql">true</property>
		
		<!-- 配置是否自动生成数据表 -->
		<property name="hbm2ddl.auto">update</property>
		
		<!-- 关联 Hibernate 映射文件 -->
		<mapping resource="com/huawei/hibernate/News.hbm.xml"/>
			
	</session-factory>

</hibernate-configuration>

4.通过Hibernate API 编写访问数据库的代码

package com.huawei.hibernate;

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

public class Main {
	
	public static void main(String[] args) {
		
		Configuration configeration = new Configuration().configure();
		
		SessionFactory factory = configeration.buildSessionFactory(); 
		
		Session session = factory.openSession();
		
		Transaction tx = session.beginTransaction();
		
		News news = new News();
		news.setTitle("hibernate");
		news.setContent("ORM");
		
		session.save(news);
		
		tx.commit();
		
		session.close();
		
		factory.close();
		
		
		
	}

}