hibernate初学helloworld

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>    <!-- 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://localhost:3306/scott</property>    <!-- 数据库方言 -->    <property name="dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>    <!-- 是否在控制台打印sql -->    <property name="show_sql">true</property>    <!-- 是否对sql格式化 -->    <property name="format_sql">true</property>    <!-- 指定自动生成数据表的策略 -->    <property name="hbm2ddl.auto">update</property>    <!-- 指定程序需要的关联的hbm.xml文件，注意不是包名而是路径 -->    <mapping resource="cn/ls/vo/News.hbm.xml"></mapping>    </session-factory></hibernate-configuration>

持久化类

package cn.ls.vo;import java.sql.Date;public class News {    private Integer id;    private String title;    @Override    public String toString() {        return "News [id=" + id + ", title=" + title + ", author=" + author + ", 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;    }    private String author;    private Date date;    public News() {    }    public News(String title, String author, Date date) {        super();        this.title = title;        this.author = author;        this.date = date;    }}

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"><!-- Generated 2017-8-4 19:39:30 by Hibernate Tools 3.4.0.CR1 --><hibernate-mapping>    <class name="cn.ls.vo.News" table="NEWS">        <id name="id" type="java.lang.Integer">            <column name="ID" />            <!-- 指定主键的生成方式 ,native使用数据库本地的方式-->            <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>

Test类

package cn.ls.vo;import static org.junit.Assert.*;import java.util.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.After;import org.junit.Before;import org.junit.Test;public class HibernateTest {    @Before    public void setUp() throws Exception {    }    @After    public void tearDown() throws Exception {    }    @Test    public void test() {        //1.创建一个SessionFactory对象        SessionFactory sf=null;            //1)创建configuretion对象，对应hibernate的基本配置信息和对象关系映射信息        Configuration con= new Configuration().configure();        //4.0前这样创建        //sf =con.buildSessionFactory();            //2)创建一个ServiceRegistry对象，hibernate的任何配置和服务都需要在该对象中注册后有效        Configuration configuration=new Configuration().configure();        ServiceRegistry service=             new ServiceRegistryBuilder().applySettings(configuration.getProperties())                        .buildServiceRegistry();        sf=configuration.buildSessionFactory(service);        //2.创建一个session对象        Session session=sf.openSession();        //3.开启事务        Transaction tr=session.beginTransaction();        //4.执行保存操作        News news= new News("java","ATGUIGU",(java.sql.Date) new Date());        //5.提交事务        tr.commit();        //6关闭session对象        session.close();        //7.关闭SessionFactory对象        sf.close();    }}