## 一、Hibernate開發。 上篇博客已經為大家介紹了持久層框架的發展流程，持久層框架的種類。 為了能夠使用Hibernate快速上手，我們先講解一個簡單的Hibernate應用實例hibernate_first。 ## 二、開發流程。 1.首先在MyEclipce中新建一個hibernate_first的項目，然后新建后的項目目錄為：  2.[配置Hibernate環境。](http://blog.csdn.net/gwblue/article/details/22691335) 3.編寫持久化類User.java ~~~ package com.bjpowernode.hibernate; import java.util.Date; public class User { private String id; private String name; private String password; private Date createTime; private Date expireTime; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public Date getCreateTime() { return createTime; } public void setCreateTime(Date createTime) { this.createTime = createTime; } public Date getExpireTime() { return expireTime; } public void setExpireTime(Date expireTime) { this.expireTime = expireTime; } } ~~~ 4.編寫生成映射文件User.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.bjpowernode.hibernate.User"> <id name="id"> <generator class="uuid"/> </id> <property name="name"/> <property name="password"/> <property name="createTime"/> <property name="expireTime"/> </class> </hibernate-mapping> ~~~ 5.編寫hibernate.cfg.xml文件。 ~~~ <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory > <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/hibernate_frist</property> <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password">root</property> <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property> <property name="hibernate.show_sql">true</property> <property name="hibernate.format_sql">true</property> <mapping resource="com/bjpowernode/hibernate/User.hbm.xml"/> </session-factory> </hibernate-configuration> ~~~ 6.生成表的類ExportDB.java。 ~~~ package com.bjpowernode.hibernate; import org.hibernate.cfg.Configuration; import org.hibernate.tool.hbm2ddl.SchemaExport; /** * 將hbm生成ddl * @author Administrator * */ public class ExportDB { public static void main(String[] args) { //默認讀取hibernate.cfg.xml文件 Configuration cfg = new Configuration().configure(); SchemaExport export = new SchemaExport(cfg); export.create(true, true); } } ~~~ 7.以上六個步驟已經把表建起來了下面我們就保存個數據，新建一個Client.java類來存入一個數據。代碼如下： ~~~ package com.bjpowernode.hibernate; import java.util.Date; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; public class Client { public static void main(String[] args) { //讀取hibernate.cfg.xml文件 Configuration cfg = new Configuration().configure(); //建立SessionFactory SessionFactory factory = cfg.buildSessionFactory(); //取得session Session session = null; try { session = factory.openSession(); //開啟事務 session.beginTransaction(); User user = new User(); user.setName("張三"); user.setPassword("123"); user.setCreateTime(new Date()); user.setExpireTime(new Date()); //保存User對象 session.save(user); //提交事務 session.getTransaction().commit(); }catch(Exception e) { e.printStackTrace(); //回滾事務 session.getTransaction().rollback(); }finally { if (session != null) { if (session.isOpen()) { //關閉session session.close(); } } } } } ~~~ ## 三、總結。 一個簡單的Hibernate例子就出來了在Hibernate初學時利用這個例子可以讓我們更好的入門。