[Hibernate] Hibernate连接mysql示范

今天用了一下java的数据库持久化-业务的hibernate框架。下面给出hibernate 连接mysql数据库示例

建表结构如下

mysql> desc test; +----------+--------------+------+-----+---------+----------------+ | Field    | Type         | Null | Key | Default | Extra          | +----------+--------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | username | varchar(100) | NO   |     | NULL    |                | +----------+--------------+------+-----+---------+----------------+ 2 rows in set (0.00 sec)

mysql>

hibernate配置文件 hibernate.cfg.xml

<?xmlversion='1.0'encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<propertyname="show_sql">true</property>
<propertyname="dialect">org.hibernate.dialect.MySQLDialect</property>
<propertyname="connection.driver_class">com.mysql.jdbc.Driver</property>
<propertyname="connection.url">jdbc:mysql://192.168.25.152/test</property>
<propertyname="connection.username">这里写用户名</property>
<propertyname="connection.password">密码</property>
<mappingresource="user.hbm.xml"/>
</session-factory>
</hibernate-configuration>

<?xml version='1.0' encoding='UTF-8'?> <!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="show_sql">true</property> <property name="dialect">org.hibernate.dialect.MySQLDialect</property> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <property name="connection.url">jdbc:mysql://192.168.25.152/test</property> <property name="connection.username">这里写用户名</property> <property name="connection.password">密码</property> <mapping resource="user.hbm.xml"/> </session-factory> </hibernate-configuration>

表映射 user.hbm.xml

<?xmlversion='1.0'encoding='UTF-8'?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<classname="com.TestDb"table="test">
    <idname="id"column="id">
        <generatorclass="increment"/>
    </id>
    <propertyname="username"column="username"/>
</class>
</hibernate-mapping>

<?xml version='1.0' encoding='UTF-8'?> <!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.TestDb" table="test"> <id name="id" column="id"> <generator class="increment"/> </id> <property name="username" column="username" /> </class> </hibernate-mapping>

表映射类

package com;

/**
* Created by IntelliJ IDEA.
* User: Administrator
* Date: 2006-2-6
* Time: 22:10:05
* To change this template use File | Settings | File Templates.
*/
publicclass TestDb {
private String username;
private Long id;

public Long getId() {
return id;
}

publicvoid setId(Long id) {
this.id = id;
}

public String getUsername() {
return username;
}

publicvoid setUsername(String myname) {
this.username = myname;
}
}

package com; /** * Created by IntelliJ IDEA. * User: Administrator * Date: 2006-2-6 * Time: 22:10:05 * To change this template use File | Settings | File Templates. */ public class TestDb { private String username; private Long id; public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String myname) { this.username = myname; } }

测试类

package com;


import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;

publicclass test {

    //遍历
    publicstaticvoid all()
    {
        Query q = session.createQuery("select c.id,c.username from TestDb as c");

        List l = q.list();
        for(int i=0;i<l.size();i++)
        {
            //TestDb user = (TestDb)l.get(i);
            //System.out.println(user.getUsername());

              Object[] row = (Object[])l.get(i);;
              Long id = (Long)row[0];
              String name = (String)row[1];
              System.out.println(id+" "+name);
        }
    }

    //读取
    publicstaticvoid load()
    {
        TestDb obj = (TestDb) session.load(TestDb.class, new Long(2));
        System.out.println(obj.getUsername());
    }

    //更新
    publicstaticvoid update()
    {
        TestDb obj = (TestDb) session.load(TestDb.class, new Long(2));
        obj.setUsername("cg");
    }

    //插入
    publicstaticvoid insert()
    {
        TestDb user = new TestDb();
        user.setUsername("sb");

        session.save(user);
    }

    static SessionFactory sessionFactory;
    static Session session ;
    static Transaction tx ;

    privatestaticvoid init()
    {
        sessionFactory = new Configuration().configure().buildSessionFactory();
        session = sessionFactory.openSession();
        tx = session.beginTransaction();
    }

    privatestaticvoid close()
    {
        tx.commit();
        session.close();
        sessionFactory.close();
    }

    publicstaticvoid main(String[] args)
    {
        init();
        update();
        close();
    }
}

package com; import java.util.List; import org.hibernate.Query; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.Transaction; import org.hibernate.cfg.Configuration; public class test { //遍历 public static void all() { Query q = session.createQuery("select c.id,c.username from TestDb as c"); List l = q.list(); for(int i=0;i<l.size();i++) { //TestDb user = (TestDb)l.get(i); //System.out.println(user.getUsername()); Object[] row = (Object[])l.get(i);; Long id = (Long)row[0]; String name = (String)row[1]; System.out.println(id+" "+name); } } //读取 public static void load() { TestDb obj = (TestDb) session.load(TestDb.class, new Long(2)); System.out.println(obj.getUsername()); } //更新 public static void update() { TestDb obj = (TestDb) session.load(TestDb.class, new Long(2)); obj.setUsername("cg"); } //插入 public static void insert() { TestDb user = new TestDb(); user.setUsername("sb"); session.save(user); } static SessionFactory sessionFactory; static Session session ; static Transaction tx ; private static void init() { sessionFactory = new Configuration().configure().buildSessionFactory(); session = sessionFactory.openSession(); tx = session.beginTransaction(); } private static void close() { tx.commit(); session.close(); sessionFactory.close(); } public static void main(String[] args) { init(); update(); close(); } }

文件结构

文章来源:http://blog.csdn.net/rcfalcon/article/details/5684546