配置和创建一个hibernate简单应用

1.配置

到http://hibernate.org/orm/下载hibernate包然后解压

 

在eclipse中新建一个java project，如名为hibernate_test

再所建工程中新建一个文件夹libs

将lib equired下的所有jar包，(另外数据库驱动的jar包，我使用mysql所以导入了mysql-connector-5.1.26-bin.jar,另外还有做测试用的junit包) 复制到libs文件夹下

 

将所有的jar包选中右键build path->add to path

再将projectetc下的hibernate.cfg.xml和log4j.properties复制到src下

 

配置完成

2.

案例

<!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>

       

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

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

        <property name="hibernate.connection.url">jdbc:mysql:///test</property>

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

        <property name="hibernate.connection.password">959511586</property>

        <mapping resource="com/kotar/entity/Student.hbm.xml"/>

       

    </session-factory>

</hibernate-configuration>

1）在hibernate.cfg.xml中添加如下，配置数据库（红色部分是数据库中创建好的的schema）

2）定义持久化类 

package com.kotar.entity;

 

import java.io.Serializable;

 

public class Student implements Serializable {

 

    /**

     *

     */

    private static final long serialVersionUID = 1L;

    private int id;

    private String name;

    private int age;

    public Student() {

        // TODO Auto-generated constructor stub

    }

    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;

    }

   

 

}

配置对象关系映射文件（Student.hbm.xml）持久化类和数据库表的对应关系

<!DOCTYPE hibernate-mapping PUBLIC

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

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

<hibernate-mapping>

    <class name="com.kotar.entity.Student" table="stu_tab">

        <id name="id" column="stu_id">

            <generator class="native"></generator>

        </id>

        <property name="name" column="stu_name"></property>

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

   

    </class>

</hibernate-mapping>

3）在hibernate.cfg.xml中注册对象关系映射文件

<mapping resource="com/kotar/entity/Student.hbm.xml"/>

4）编写测试类，对数据库操作

package com.kotar.test;

 

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.boot.registry.StandardServiceRegistry;

import org.hibernate.boot.registry.StandardServiceRegistryBuilder;

import org.hibernate.cfg.Configuration;

import org.hibernate.tool.hbm2ddl.SchemaExport;

import org.junit.Test;

 

import com.kotar.entity.Student;

 

public class StudentTest {

   

    @Test

    public void createTable() {

        Configuration cfg=new Configuration().configure();

        SchemaExport se=new SchemaExport(cfg);

        se.create(true, true);

    }

    @Test

    public void insert(){

        Configuration cfg=new Configuration().configure();

       

        StandardServiceRegistryBuilder ssrb=new StandardServiceRegistryBuilder().applySettings(cfg.getProperties());

        StandardServiceRegistry serviceRegistry= ssrb.build();

        SessionFactory sessionFactory=cfg.buildSessionFactory(serviceRegistry);

        //获取Session

        Session session=sessionFactory.openSession();

        //获取事务

        org.hibernate.Transaction transaction=session.beginTransaction();

        //输入数据

        Student student=new Student();

        student.setAge(17);

        student.setName("kotar");

       

        try {

            session.save(student);

            transaction.commit();

        } catch (Exception e) {

            try {

                transaction.rollback();

            } catch (IllegalStateException e1) {

                // TODO Auto-generated catch block

                e1.printStackTrace();

            }

        }finally {

            session.clear();

        }

       

    }

}

先后用junit运行测试方法createTable（）和insert（）

 

结果如下