Hibernate入门（附源代码，jar包）

来源：互联网发布：詹姆斯数据排名编辑：程序博客网时间：2024/06/05 09:12

可以直接去我的下载页下载jar包（不要积分）http://download.csdn.net/detail/sdfiiiiii/5236307

源代码下载（不要积分）http://download.csdn.net/detail/sdfiiiiii/5236317

1. 安装eclipse hibernate 插件

http://download.jboss.org/jbosstools/updates/stable/
选择   JBoss Application Development   的     Hibernate Tools

2. 导入需要的包，目前使用的是struts2与hibernate，用到的包有：
antlr-2.7.6.jar
commons-collections-3.1.jar
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
commons-lang3-3.1.jar
commons-logging-1.1.1.jar
dom4j-1.6.1.jar
freemarker-2.3.19.jar
hibernate3.jar
javassist-3.11.0.GA.jar
javassist-3.4.GA.jar
jta-1.1.jar
log4j-1.2.14.jar
mysql-connector-java-5.0.3-bin.jar
ognl-3.0.6.jar
servlet-api.jar
slf4j-api-1.5.2.jar
slf4j-log4j12-1.5.2.jar
struts2-core-2.3.12.jar
xwork-core-2.3.12.jar

3. User.java,基本的POJO类
package com.login.vo;

public class User {
   private int id;
   private String username;
   private String password;
   private int isActive;

   public int getId() {
       return id;
   }
   public void setId(int id) {
       this.id = id;
   }
   public int getIsActive() {
       return isActive;
   }
   public void setIsActive(int isActive) {
       this.isActive = isActive;
   }
   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;
   }

   public String toString(){
       return "id:"+this.id+" username:"+this.username+" password:"+this.password+" isActive:"+this.isActive;
   }
}

4. 最典型的hibernate mapping文件可以是：
<?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 package="com.briup.hibernate.pojo" >
    <class name="com.login.vo.User" table="users" >
        <id name="id" column="id">
        </id>
        <property name="username" column="name"></property>
        <property name="password" column="passwd"></property>
        <property name="isActive" column="isActive"></property>
    </class>
</hibernate-mapping>

5. 这里使用的是mysql数据库，如果数据库需要改变，那么在hibernate.cfg.xml文件中修改,基本配置可以写为
<?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="connection.driver_class">com.mysql.jdbc.Driver</property>
      
      <property name="connection.url">jdbc:mysql://localhost/test</property>
      <property name="connection.useUnicode">true</property>
      <property name="connection.characterEncoding">gbk</property>
      
      <property name="connection.username">root</property>
      
      <property name="connection.password">123456</property>
      
      <property name="hibernate.c3p0.max_size">20</property>
      
      <property name="hibernate.c3p0.min_size">1</property>
      
      <property name="hibernate.c3p0.timeout">1800</property>
      
            <property name="show_sql">true</property>
      
        <property name="hibernate.format_sql">true</property>
        <mapping resource="com/briup/hibernate/pojo/Student.hbm.xml"/>
        <mapping resource="com/login/vo/Users.hbm.xml"/>
        <mapping resource="com/vo/usernote/kelvin/Notes.hbm.xml"/>
        <mapping resource="com/vo/usernote/kelvin/Categories.hbm.xml"/>

    </session-factory>
</hibernate-configuration>

6. 自己写的HibernateUtil.java类，用于封装一些常用的操作，未完善
package Util;
import java.io.Serializable;
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 final class HibernateUtil {
    private static SessionFactory sessionFactory;
    private static ThreadLocal session = new ThreadLocal();

    public HibernateUtil() {
    }

    static {
        Configuration cfg = new Configuration();
        cfg.configure();
        sessionFactory = cfg.buildSessionFactory();
    }

    public static Session getThreadLocalSession() {
        Session s = (Session) session.get();
        if (s == null) {
            s = getSession();
            session.set(s);
        }
        return s;
    }

    public static void closeSession() {
        Session s = (Session) session.get();
        if (s != null) {
            s.close();
            session.set(null);
        }
    }

    public static SessionFactory getSessionFactory() {
        return sessionFactory;
    }

    public static Session getSession() {
        return sessionFactory.openSession();
    }

    public static void add(Object entity) {
        Session s = null;
        Transaction tx = null;
        try {
            s = HibernateUtil.getSession();
            tx = s.beginTransaction();
            s.save(entity);
            tx.commit();
        } finally {
            if (s != null)
                s.close();
        }
    }

    public static void update(Object entity) {
        Session s = null;
        Transaction tx = null;
        try {
            s = HibernateUtil.getSession();
            tx = s.beginTransaction();
            s.update(entity);
            tx.commit();
        } finally {
            if (s != null)
                s.close();
        }
    }

    public static void delete(Object entity) {
        Session s = null;
        Transaction tx = null;
        try {
            s = HibernateUtil.getSession();
            tx = s.beginTransaction();
            s.delete(entity);
            tx.commit();
        } finally {
            if (s != null)
                s.close();
        }
    }

    public static List query(String queryString){
       Session s = null;
       List list = null;
       try {
           s = HibernateUtil.getSession();
           Query query = s.createQuery(queryString);
           list = query.list(); //搴忓垪鍖�           return list;
           return list;
       } finally {
           if (s != null)
               s.close();
       }

    }

    public static Object get(Class clazz, Serializable id) {
        Session s = null;
        try {
            s = HibernateUtil.getSession();
            Object obj = s.get(clazz, id);
            return obj;
        } finally {
            if (s != null)
                s.close();
        }
    }
}

7. JUnit测试类
import java.util.List;

import junit.framework.TestCase;
import Util.HibernateUtil;

import com.login.vo.User;
import com.vo.usernote.kelvin.Notes;

public class TestHibernate extends TestCase {
   public void testUser(){
       @SuppressWarnings("unchecked")
       List<User> usersList = HibernateUtil.query("from User");
       for(User user: usersList){
           System.out.println(user.toString());
       }
   }

   public void testNotes(){
       List<Notes> notesList = HibernateUtil.query("from Notes");
       for(Notes note: notesList){
           System.out.println(note.toString());
       }
   }
}