Hibernate 3.0 学习笔记(1)

先来一个调试过的例子吧，数据库是Mysql。

文件结构如下

src 

   colo

           hibernate

                    HibernateTest.java

                    Userinfo.java

                    Userinfo.hbm.xml

   lib

        mysql-connector-java-5.1.13-bin.jar (mysql驱动)

        hibernate3.jar (Hibernate包，虽然有些不是必须的，在这都写上了)

        antlr-2.7.6.jar

        commons-collections-3.1.jar

        dom4j-1.6.1.jar

        hibernate-jpa-2.0-api-1.0.0.Final.jar

        javassist-3.12.0.GA.jar

        jta-1.1.jar

        slf4j-api-1.6.1.jar

 

下面附上文件代码：

HibernateTest.java

package colo.hibernate;

import colo.hibernate.Userinfo;

import org.hibernate.HibernateException;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import org.hibernate.cfg.Configuration;

public class HibernateTest {

 

/**

* @param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

         SessionFactory sessions=new Configuration().configure().buildSessionFactory();

         Session session=sessions.openSession();

         Transaction tx=null;

         try{

         tx=session.beginTransaction();

         Userinfo u=new Userinfo();

         u.setUsername("GeGe");

         u.setPassword("555555");

         session.save(u);

         Userinfo u1=(Userinfo) session.load(Userinfo.class, new Integer(1));

         System.out.println("从数据库加载的用户名为："+u1.getUsername());

         tx.commit();

         tx=null;

         }catch(HibernateException e){

         System.out.println(e.getMessage());

         e.printStackTrace();

         if(tx!=null){

         tx.rollback();

         }

         }finally{

         session.close();

         }

}

 

}

Userinfo.java

package colo.hibernate;

public class Userinfo {

     

private Integer id;

  private String username;

    private String password;

     

     public Integer getId() {

return id;

}

public void setId(Integer id) {

this.id = id;

}

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

}

Userinfo.hbm.xml

<?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="colo.hibernate.Userinfo" table="login">

<id name="id" type="integer">

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

<generator class="identity"></generator>

    </id>

<property name="username" type="string">

<column name="name" length="100"></column></property>

<property name="password" type="string">

<column name="password" length="100"></column></property>

</class>

</hibernate-mapping>

hibernate.cfg.xml

<?xml version='1.0' encoding='gb2312'?>

<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory>

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

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

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

<property name="hibernate.connection.password">111111</property>

<property name="hibernate.connection.pool.size">20</property>

<property name="hibernate.show_sql">true</property>

<property name="jdbc.fetch_size">50</property>

<property name="jdbc.batch_size">25</property>

<property name="jdbc.use_scrollable_resultset">false</property>

<property name="connection.useUnicode">true</property>

<property name="connection.characterEncoding">gb2312</property>

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

<mapping resource="colo/hibernate/Userinfo.hbm.xml"/>

</session-factory>

</hibernate-configuration>

That's all

让你的第一个Hibernate跑起来吧！

Good Luck guy