SSH框架搭建过程---之Hibernate框架的使用（1）

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Hibernate框架的使用

0.导包

1. hibernate.cfg.xml

<span style="font-size:12px;color:#339999;"><strong><?xml version="1.0"encoding="UTF-8"?>         <!DOCTYPE hibernate-configurationPUBLIC                            "-//Hibernate/HibernateConfiguration DTD 3.0//EN"                            "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">                                    <hibernate-configuration>                    <session-factory>                             <!-- Databaseconnection settings -->                            <propertyname="connection.driver_class">com.mysql.jdbc.Driver</property>                            <property name="connection.url">jdbc:mysql://localhost:3306/graduate</property>                            <propertyname="connection.username">root</property>                            <propertyname="connection.password">root</property>                             <!-- SQL dialect-->                            <propertyname="dialect">org.hibernate.dialect.MySQLDialect</property>                             <!-- Echo allexecuted SQL to stdout -->                            <propertyname="show_sql">true</property>                            <propertyname="format_sql">true</property>                             <mappingresource="cn/edu/bucea/domain/Demo.hbm.xml" />                    </session-factory>          </hibernate-configuration></strong></span>

2. Demo.java

<span style="font-size:12px;">/**          *          */         package cn.edu.bucea.domain;          import java.io.Serializable;          /**          * @author JJG          *          */         public class Demo implementsSerializable {                    private static final longserialVersionUID = -2072913502409092000L;                                     private String id;                   private String name;                   private String password;                                     public Demo() {}                    /**                    * @param id                    * @param name                    * @param password                    */                   public Demo(String id, Stringname, String password) {                            super();                            this.id = id;                            this.name = name;                            this.password =password;                   }                    public String getId() {                            return id;                   }                    public void setId(String id){                            this.id = id;                   }                    public String getName() {                            return name;                   }                    public void setName(Stringname) {                            this.name = name;                   }                    public String getPassword() {                            return password;                   }                    public voidsetPassword(String password) {                            this.password =password;                   }                    @Override                   public String toString() {                            return "Demo[id=" + id + ", name=" + name + ", password=" +password                                               +"]";                   }                           }</span>

Demo.hbm.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE hibernate-mapping PUBLIC        "-//Hibernate/HibernateMapping DTD 3.0//EN"        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">       <hibernate-mapping>     <class name="cn.edu.bucea.domain.Demo"table="DEMO">        <id name="id" type="int">            <column name="ID"/>            <generator class="identity"/>        </id>        <property name="name" type="string">            <column name="NAME"/>        </property>        <property name="password" type="string">            <column name="PASSWORD"></column>        </property>    </class> </hibernate-mapping>

把新的映射加入到Hibernate的配置中；

例：<mapping resource=" cn/edu/bucea/domain/Demo.hbm.xml"/>

3.SessionfactoryUtil.java

importorg.hibernate.HibernateException;importorg.hibernate.SessionFactory;importorg.hibernate.cfg.Configuration; public classSessionFactoryUtil {    private static SessionFactory sessionFactory;    private static String CONFIG_FILE_LOCATION = "/cn/edu/bucea/config/hibernate.cfg.xml";       static{       try{           sessionFactory = new Configuration().configure(CONFIG_FILE_LOCATION).                  buildSessionFactory();       }catch(HibernateExceptione){           System.err.println("%%%% Error Creating SessionFactory %%%%");           e.printStackTrace();       }    }       public static SessionFactorygetSessionFactory() {       return sessionFactory;    }       public static void main(String[]args) {       System.out.println(getSessionFactory());    } }

DemoException.java

/** * @author JJG *  用户自定义异常类 */public class DemoException extends Exception {     private static final long serialVersionUID = 704805066683813880L;     publicDemoException(Exception e){       super(e);    }       publicDemoException(String msg){       super(msg);    }}

4. DemoDAO.java

importorg.hibernate.HibernateException;importorg.hibernate.Session;importorg.hibernate.Transaction;import cn.edu.bucea.domain.Demo;importcn.edu.bucea.exception.DemoException;importcn.edu.bucea.util.SessionFactoryUtil; public class DemoDAO {   public DemoDAO() {  }   public void saveDemo(Demodemo) throws DemoException{     Session session= null;     Transactiontransaction = null;//注意Session和Transaction的包     try{         session =SessionFactoryUtil.getSessionFactory().openSession();         transaction= session.beginTransaction();         session.save(demo);         transaction.commit();     } catch(HibernateExceptione){         transaction.rollback();         throw newDemoException(e.getMessage());     } finally{         if (session != null){            session.close();         }     }     //...  }}

5.DeomTest.java

import cn.edu.bucea.DAO.DemoDAO;import cn.edu.bucea.domain.Demo;import cn.edu.bucea.exception.DemoException; /** * @author JJG * DemoDAO测试类 */public class DemoTest {     public static void testSaveDemo() throws DemoException{       Demo demo = new Demo();       demo.setId(1);       demo.setName("JJG");       demo.setPassword("123");             DemoDAO demoDAO = new DemoDAO();       demoDAO.saveDemo(demo);          }    //…     public static void main(String[] args) throws DemoException {       testSaveDemo();    //…    }   }

6…

注：以上Hibernate框架的单独应用

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