Hibernate入门之helloworld
1、hibernate.cfg.xml
<?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>
<!-- 配置连接数据库的基本信息 -->
<property name="connection.username">root</property>
<property name="connection.password">123456</property>
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql:///hibernate5</property>
<!-- 配置 hibernate 的基本信息 -->
<property name="dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
<property name="show_sql">true</property>
<property name="format_sql">true</property>
<property name="hbm2ddl.auto">update</property>
<!-- 指定关联的 .hbm.xml 文件 -->
<mapping resource="com/atguigu/hibernate/helloworld/News.hbm.xml"/>
</session-factory>
</hibernate-configuration>
2、News.java
package com.atguigu.hibernate.helloworld;
import java.sql.Date;
public class News {
private Integer id;
private String title;
private String author;
private Date date;
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;
}
public Date getDate() {
return date;
}
public void setDate(Date date) {
this.date = date;
}
public News(String title, String author, Date date) {
super();
this.title = title;
this.author = author;
this.date = date;
}
public News() {
// TODO Auto-generated constructor stub
}
@Override
public String toString() {
return "News [id=" + id + ", title=" + title + ", author=" + author
+ ", date=" + date + "]";
}
}
3、News.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>
<class name="com.atguigu.hibernate.helloworld.News" table="NEWS">
<id name="id" type="java.lang.Integer">
<column name="ID" />
<!-- 指定主键的生成方式 -->
<generator class="native" />
</id>
<property name="title" type="java.lang.String">
<column name="TITLE" />
</property>
<property name="author" type="java.lang.String">
<column name="AUTHOR" />
</property>
<property name="date" type="java.sql.Date">
<column name="DATE" />
</property>
</class>
</hibernate-mapping>
4、HibernateTest
package com.atguigu.hibernate.helloworld;
import java.sql.Date;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
import org.junit.Test;
public class HibernateTest {
@Test
public void test() {
// System.out.println("test...");
//1. 创建一个 SessionFactory 对象
SessionFactory sessionFactory = null;
Configuration configuration = new Configuration().configure();
ServiceRegistry serviceRegistry =
new ServiceRegistryBuilder().applySettings(configuration.getProperties())
.buildServiceRegistry();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
//2. 创建一个 Session 对象
Session session = sessionFactory.openSession();
//3. 开启事务
Transaction transaction = session.beginTransaction();
//4. 执行保存操作
News news = new News("Java", "ATGUIGU", new Date(new java.util.Date().getTime()));
session.save(news);
//5. 提交事务
transaction.commit();
//6. 关闭 Session
session.close();
//7. 关闭 SessionFactory 对象
sessionFactory.close();
}
}