第一个hibernate项目
1、新建java项目
2、创建User Library,加入如下jar
* HIBERNATE_HOME/hibernate3.jar
* HIBERNATE_HOME/lib/*.jar
* MySql jdbc驱动
3、创建hibernate配置文件hibernate.cfg.xml，为了便于调试最好加入log4j配置文件
4、定义实体类
5、定义User类的映射文件User.hbm.xml
6、将User.hbml.xml文件加入到hibernate.cfg.xml文件中
7、编写hbm2ddl工具类，将实体类生成数据库表
8、开发客户端
为了方便跟踪sql执行，在hibernate.cfg.xml文件中加入<property name="hibernate.show_sql">true</property>
package com.bjsxt.hibernate;import org.hibernate.cfg.Configuration;import org.hibernate.tool.hbm2ddl.SchemaExport;public class ExportDB { public static void main(String[] args) { //读取hibernate.cfg.xml文件 Configuration cfg = new Configuration().configure(); SchemaExport export = new SchemaExport(cfg); export.create(true, true); }}
package com.bjsxt.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; }}
<?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.bjsxt.hibernate.User"> <id name="id"> <generator class="uuid"/> </id> <property name="name"/> <property name="password"/> <property name="createTime"/> <property name="expireTime"/> </class></hibernate-mapping>
package com.bjsxt.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) { //读取hibernate.cfg.xml文件 Configuration cfg = new Configuration().configure(); //创建SessionFactory SessionFactory factory = cfg.buildSessionFactory(); Session session = null; try { session = factory.openSession(); //开启事务 session.beginTransaction(); User user = new User(); user.setName("张三"); user.setPassword("123"); user.setCreateTime(new Date()); user.setExpireTime(new Date()); //保存数据 session.save(user); //提交事务 session.getTransaction().commit(); }catch(Exception e) { e.printStackTrace(); //回滚事务 session.getTransaction().rollback(); }finally { if (session != null) { if (session.isOpen()) { //关闭session session.close(); } } } }}
<!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.url"> jdbc:mysql://localhost/hibernate_first </property> <property name="hibernate.connection.driver_class"> com.mysql.jdbc.Driver </property> <property name="hibernate.connection.username">root</property> <property name="hibernate.connection.password">123</property> <property name="hibernate.dialect"> org.hibernate.dialect.MySQLDialect </property> <property name="hibernate.show_sql">true</property> <property name="myeclipse.connection.profile"> hibernate_first </property> <property name="connection.url"> jdbc:mysql://hostname/hibernate_first </property> <property name="connection.username">root</property> <property name="connection.password">123</property> <property name="connection.driver_class"> com.mysql.jdbc.Driver </property> <property name="dialect"> org.hibernate.dialect.MySQLDialect </property> <mapping resource="com/bjsxt/hibernate/User.hbm.xml" /></session-factory></hibernate-configuration>
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