hibernate demo入门

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此demo项目采用hibernate3.2

new 一个普通的java项目，引入hibernate所需要的jar包：核心jar hibernate3.jar，其他依赖jar /lib 下 ,mysql 驱动jar

hibernate 核心配置文件：默认就放到classpath根目录下(src根目录)即可

hibernate.cfg.xml

注意：session-factory 元素中不要配置 name 属性值，否则会报如下异常

Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: Java.naming.factory.initial

<!DOCTYPE hibernate-configuration PUBLIC"-//Hibernate/Hibernate Configuration DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd"><hibernate-configuration><session-factory >     <!--     #hibernate.dialect org.hibernate.dialect.MySQLDialect#hibernate.dialect org.hibernate.dialect.MySQLInnoDBDialect#hibernate.dialect org.hibernate.dialect.MySQLMyISAMDialect     #hibernate.connection.driver_class com.mysql.jdbc.Driver#hibernate.connection.url jdbc:mysql:///test#hibernate.connection.username gavin#hibernate.connection.password      -->    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>    <property name="hibernate.connection.url">jdbc:mysql://localhost:3316/hibernatedemo?useUnicode=true&characterEncoding=UTF-8</property>    <property name="hibernate.connection.username">root</property>    <property name="hibernate.connection.password">winmshl</property>    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>    <property name="hibernate.hbm2ddl.auto">update</property>    <property name="show_sql">true</property><mapping resource="com/jelly/hibernatedemo/entity/User.hbm.xml"/> </session-factory></hibernate-configuration>

User.hbm.xml 映射文件：

<?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 package="com.jelly.hibernatedemo.entity"><class name="User" ><id name="id"><generator class="native"/></id><property name="name"/>    <property name="birthday"/> </class></hibernate-mapping>

实体bean ：

package com.jelly.hibernatedemo.entity;import java.util.Date;public class User {private int id;private String name;private Date birthday;public int getId() {return id;}public String getName() {return name;}public Date getBirthday() {return birthday;}public void setId(int id) {this.id = id;}public void setName(String name) {this.name = name;}public void setBirthday(Date birthday) {this.birthday = birthday;}@Overridepublic String toString() {return "User [id=" + id + ", name=" + name + ", birthday=" + birthday+ "]";}}

一个简单的demo类（测试类）

package com.jelly.hibernatedemo.main;import java.util.Date;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.hibernate.Transaction;import org.hibernate.cfg.Configuration;import com.jelly.hibernatedemo.entity.User;public class MainTest {    public static void main(String[] args) {    try {    Configuration  conf=new Configuration();    SessionFactory sessionFactory= conf.configure().buildSessionFactory();    Session session=sessionFactory.openSession();    Transaction tx=session.beginTransaction();    User user=new User() ;    user.setName("张三");    user.setBirthday(new Date());    session.save(user);    tx.commit();    session.close();} catch (Exception e) {e.printStackTrace();}}}

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