Hibernate 4.3 配置文件实现

1、建立web项目

2、复制相关的jar文件到 项目的lib目录下
antlr-2.7.7.jar
dom4j-1.6.1.jar
hibernate-commons-annotations-4.0.5.Final.jar
hibernate-core-4.3.7.Final.jar
hibernate-jpa-2.1-api-1.0.0.Final.jar
jandex-1.1.0.Final.jar
javassist-3.18.1-GA.jar
jboss-logging-3.1.3.GA.jar
jboss-logging-annotations-1.2.0.Beta1.jar
jboss-transaction-api_1.2_spec-1.0.0.Final.jar
mysql.jar

3、src目录下建立hibernate.cfg.xml文件

<?xml version='1.0' encoding='utf-8'?>

<!DOCTYPE hibernate-configuration PUBLIC

        "-//Hibernate/Hibernate Configuration DTD 3.0//EN"

        "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory>

    <!-- 数据库方言 -->

    <property name="dialect">

        org.hibernate.dialect.MySQL5Dialect

    </property>



    <!-- 数据库连接设置 -->

    <property name="connection.driver_class">

        com.mysql.jdbc.Driver

    </property>

    <property name="connection.url">

        jdbc:mysql://localhost:3306/db?useUnicode=true&amp;characterEncoding=utf8

    </property>

    <property name="connection.username">root</property>

    <property name="connection.password">fengze</property>



    <!-- 显示SQL语句 -->

    <property name="show_sql">true</property>



    <!-- 如果表不存在，直接建立或更新对应的表 -->

    <property name="hbm2ddl.auto">update</property>



    <!-- 对象映射的配置文件 -->

    <mapping resource="com/db/model/Student.hbm.xml" />



</session-factory>



</hibernate-configuration>

4、Student类

package com.db.model;



import java.util.Date;



public class Student {

    private int id;

    private String name;

    private Date birthday;

    private double price;



    public int getId() {

        return id;

    }



    public void setId(int id) {

        this.id = id;

    }



    public String getName() {

        return name;

    }



    public void setName(String name) {

        this.name = name;

    }



    public Date getBirthday() {

        return birthday;

    }



    public void setBirthday(Date birthday) {

        this.birthday = birthday;

    }



    public double getPrice() {

        return price;

    }



    public void setPrice(double price) {

        this.price = price;

    }



}

5、Student类映射XML（在Student类下 Student.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.db.model.Student">

        <id name="id">

            <generator class="native" />

        </id>

        <property name="name" type="string" length="15" />

        <property name="birthday" type="date" />

        <property name="price" type="double" precision="4" scale="1" />

    </class>

</hibernate-mapping>

6、HibernateSessionFactory.java

package com.db.hibernate;



import org.hibernate.HibernateException;

import org.hibernate.Session;

import org.hibernate.cfg.Configuration;

import org.hibernate.service.ServiceRegistry;

import org.hibernate.service.ServiceRegistryBuilder;



/**

 * Configures and provides access to Hibernate sessions, tied to the

 * current thread of execution.  Follows the Thread Local Session

 * pattern, see {@link http://hibernate.org/42.html }.

 */

public class HibernateSessionFactory {



    /** 

     * Location of hibernate.cfg.xml file.

     * Location should be on the classpath as Hibernate uses  

     * #resourceAsStream style lookup for its configuration file. 

     * The default classpath location of the hibernate config file is 

     * in the default package. Use #setConfigFile() to update 

     * the location of the configuration file for the current session.   

     */

    private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();

    private static org.hibernate.SessionFactory sessionFactory;

    

    private static Configuration configuration = new Configuration();

    private static ServiceRegistry serviceRegistry; 



    static {

        try {

            configuration.configure();

            serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();

            sessionFactory = configuration.buildSessionFactory(serviceRegistry);

        } catch (Exception e) {

            System.err.println("%%%% Error Creating SessionFactory %%%%");

            e.printStackTrace();

        }

    }

    private HibernateSessionFactory() {

    }

    

    /**

     * Returns the ThreadLocal Session instance.  Lazy initialize

     * the <code>SessionFactory</code> if needed.

     *

     *  @return Session

     *  @throws HibernateException

     */

    public static Session getSession() throws HibernateException {

        Session session = (Session) threadLocal.get();



        if (session == null || !session.isOpen()) {

            if (sessionFactory == null) {

                rebuildSessionFactory();

            }

            session = (sessionFactory != null) ? sessionFactory.openSession()

                    : null;

            threadLocal.set(session);

        }



        return session;

    }



    /**

     *  Rebuild hibernate session factory

     *

     */

    public static void rebuildSessionFactory() {

        try {

            configuration.configure();

            serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();

            sessionFactory = configuration.buildSessionFactory(serviceRegistry);

        } catch (Exception e) {

            System.err.println("%%%% Error Creating SessionFactory %%%%");

            e.printStackTrace();

        }

    }



    /**

     *  Close the single hibernate session instance.

     *

     *  @throws HibernateException

     */

    public static void closeSession() throws HibernateException {

        Session session = (Session) threadLocal.get();

        threadLocal.set(null);



        if (session != null) {

            session.close();

        }

    }



    /**

     *  return session factory

     *

     */

    public static org.hibernate.SessionFactory getSessionFactory() {

        return sessionFactory;

    }

    /**

     *  return hibernate configuration

     *

     */

    public static Configuration getConfiguration() {

        return configuration;

    }



}

7、index.jsp

<%@page import="java.util.Date"%>

<%@page import="com.db.model.Student"%>

<%@page import="org.hibernate.Transaction"%>

<%@page import="org.hibernate.Session"%>

<%@page import="com.db.hibernate.HibernateSessionFactory"%>

<%@ page language="java" pageEncoding="utf-8"%>

<%

Session s = HibernateSessionFactory.getSession();

Transaction tx = s.beginTransaction();

Student s1 = new Student();

s1.setPrice(800);

s1.setName("中文");

s1.setBirthday(new Date());

s.save(s1);

tx.commit();

%>