hibernate 初学

hibernate版本：3.3.2

文件目录：

*.hbm.xml配置文件:

<?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.zzl.Event" table="EVENTS">
        <id name="id" column="EVENT_ID">
            <generator class="native"/>
        </id>
        <property name="date" type="timestamp" column="EVENT_DATE"/>
        <property name="title"/>
     </class>

 
 
</hibernate-mapping>

hibernate.cfg.xml配置文件

<?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>

        <!-- Database connection settings -->
        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="connection.url">jdbc:oracle:thin:@ip:unieap</property>
        <property name="connection.username">tabuser</property>
        <property name="connection.password">tabuser</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>

        <!-- Enable Hibernate's automatic session context management -->
        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <!--
        <property name="hbm2ddl.auto">create</property>
  -->
        <mapping resource="com/zzl/Event.hbm.xml"/>

    </session-factory>

</hibernate-configuration>

查找方言超链接：http://kb.cnblogs.com/a/1587624/

实体类：

package com.zzl;

import java.util.Date;

public class Event
{

    private Long id;
    private String title;
    private Date date;
    public Event(){}
    public Long getId()
    {
        return id;
    }
    private void setId(Long id)
    {
        this.id = id;
    }
    public String getTitle()
    {
        return title;
    }
    public void setTitle(String title)
    {
        this.title = title;
    }
    public Date getDate()
    {
        return date;
    }
    public void setDate(Date date)
    {
        this.date = date;
    }
   
}

辅助类：

package com.util;

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

public class HibernateUtil
{
    private static final SessionFactory sessionFactory;

    static {
        try {
             sessionFactory = new Configuration().configure().buildSessionFactory();
        } catch (Throwable ex) {
            System.err.println("Initial SessionFactory creation failed." + ex);
            throw new ExceptionInInitializerError(ex);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }

}

主类：

package com.app;

import java.util.Date;

import org.hibernate.Session;

import com.util.HibernateUtil;
import com.zzl.Event;

public class App
{
    public static void main(String[] args)
    {
        Session session=HibernateUtil.getSessionFactory().getCurrentSession();
        session.beginTransaction();
        Event event=new Event();
        event.setTitle("zzl");
        event.setDate(new Date());
        session.save(event);
        session.getTransaction().commit();
        HibernateUtil.getSessionFactory().close();
    }
}