Hibernate入门之helloworld

1、hibernate.cfg.xml<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE h足毂忍珩ibernate-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.javapackage 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、HibernateTestpackage 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(); } }