创建第一个hibernate应用程序---- Hello world

1.创建Java project

My eclipse-》New-》Java Project ，命名：hibernate-0100-HelloWorld

2.添加自定义用户库

Window-》Preferences->




3.引用User Library

点击项目：右键-》Build path ->add libraries->User Liabrary选择Hibernate

4.引入mysql的JDBC驱动包

右键->bulid path->add external achives->选择My sql 驱动

5.在DB中创建一个table

student (id,name,age);

6.在Project中创建一个类




package com.bjsxt.hibernate.model;

public class student {

private int id;

private String name;

private int age;

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 int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

}

7.写一个测试类

8.在src中添加Hibernate配置

右键-》new-》file 命名：hibernate.cfg.xml<?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>

<!-- Database connection settings -->

<property name="connection.driver_class">com.mysql.jdbc.Driver</property>

<property name="connection.url">jdbc:mysql://localhost/myproject</property>

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

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



<!-- JDBC connection pool (use the built-in) -->

<!-- <property name="connection.pool_size">1</property> -->



<!-- SQL dialect -->

<property name="dialect">org.hibernate.dialect.MySQLDialect</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">update</property> -->

<mapping resource="org/hibernate/tutorial/domain/Event.hbm.xml" />

</session-factory>

</hibernate-configuration>

10.建立映射文件，与类文件放在一个包里，命名为：类名.hbm.xml

new->file->student.hbm.xml

<?xml version="1.0"?>

<!DOCTYPE hibernate-mapping PUBLIC

"-//Hibernate/Hibernate Mapping DTD 3.0//EN"

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

<hibernate-mapping package="com.bjsxt.hibernate.model">

<class name="student">

<id name="id" column="id"></id>

<property name="name"></property>

<property name="age"></property>

</class>

</hibernate-mapping>

11.创建测试类，在默认的Pakeage中

package com.bjsxt.hibernate.model;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.cfg.Configuration;

public class StudentTest {

public static void main(String[] args) {

student st=new student();

st.setId(1);

st.setName("Sophia");

st.setAge(25);

Configuration cfg=new Configuration();

SessionFactory sf= cfg.configure().buildSessionFactory();

Session session=sf.openSession();

session.beginTransaction();

session.save(st);

session.getTransaction().commit();

session.close();

sf.close();

}

}