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文件结构如下 开发工具myEclipse6.M1


代码(具体位置看package位置)

package com.lusm.hib.dao;

import org.hibernate.Session;

public interface IBaseHibernateDAO {
    
public Session getSession();
}

package com.lusm.hib.dao.impl;

import org.hibernate.Session;

import com.lusm.hib.dao.IBaseHibernateDAO;
import com.lusm.hib.factory.HibernateSessionFactory;

public class BaseHibernateDAO implements IBaseHibernateDAO {

    
public Session getSession() {
        
return HibernateSessionFactory.getSession();
    }


}

package com.lusm.hib.factory;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;

public class HibernateSessionFactory {

    
private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
    
private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
    
private static Configuration configuration = new Configuration();
    
private static org.hibernate.SessionFactory sessionFactory;
    
private static String configFile = CONFIG_FILE_LOCATION;

    
static {
        
try {
            configuration.configure(configFile);
            sessionFactory 
= configuration.buildSessionFactory();
        }
 catch (Exception e) {
            System.err.println(
"%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }

    }


    
private HibernateSessionFactory() {
    }


    
public static Session getSession() throws HibernateException {
        Session session 
= (Session) threadLocal.get();

        
if (session == null || !session.isOpen()) {
            
if (sessionFactory == null{
                rebuildSessionFactory();
            }

            session 
= (sessionFactory != null? sessionFactory.openSession()
                    : 
null;
            threadLocal.set(session);
        }


        
return session;
    }


    
public static void rebuildSessionFactory() {
        
try {
            configuration.configure(configFile);
            sessionFactory 
= configuration.buildSessionFactory();
        }
 catch (Exception e) {
            System.err.println(
"%%%% Error Creating SessionFactory %%%%");
            e.printStackTrace();
        }

    }


    
public static void closeSession() throws HibernateException {
        Session session 
= (Session) threadLocal.get();
        threadLocal.set(
null);

        
if (session != null{
            session.close();
        }

    }


    
public static org.hibernate.SessionFactory getSessionFactory() {
        
return sessionFactory;
    }


    
public static void setConfigFile(String configFile) {
        HibernateSessionFactory.configFile 
= configFile;
        sessionFactory 
= null;
    }


    
public static Configuration getConfiguration() {
        
return configuration;
    }


}

package com.lusm.stu.dao;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.Query;
import org.hibernate.criterion.Example;

import com.lusm.hib.dao.impl.BaseHibernateDAO;
import com.lusm.stu.vo.Student;

public class StudentDAO extends BaseHibernateDAO {
    
private static final Log log = LogFactory.getLog(StudentDAO.class);
    
// property constants
    public static final String NAME = "name";

    
public void save(Student transientInstance) {
        log.debug(
"saving Student instance");
        
try {
            getSession().save(transientInstance);
            log.debug(
"save successful");
        }
 catch (RuntimeException re) {
            log.error(
"save failed", re);
            
throw re;
        }

    }


    
public void delete(Student persistentInstance) {
        log.debug(
"deleting Student instance");
        
try {
            getSession().delete(persistentInstance);
            log.debug(
"delete successful");
        }
 catch (RuntimeException re) {
            log.error(
"delete failed", re);
            
throw re;
        }

    }


    
public Student findById(java.lang.Long id) {
        log.debug(
"getting Student instance with id: " + id);
        
try {
            Student instance 
= (Student) getSession().get(
                    
"com.lusm.stu.vo.Student", id);
            
return instance;
        }
 catch (RuntimeException re) {
            log.error(
"get failed", re);
            
throw re;
        }

    }


    
public List findByExample(Student instance) {
        log.debug(
"finding Student instance by example");
        
try {
            List results 
= getSession().createCriteria(
                    
"com.lusm.stu.vo.Student").add(Example.create(instance))
                    .list();
            log.debug(
"find by example successful, result size: "
                    
+ results.size());
            
return results;
        }
 catch (RuntimeException re) {
            log.error(
"find by example failed", re);
            
throw re;
        }

    }


    
public List findByProperty(String propertyName, Object value) {
        log.debug(
"finding Student instance with property: " + propertyName
                
+ ", value: " + value);
        
try {
            String queryString 
= "from Student as model where model."
                    
+ propertyName + "= ?";
            Query queryObject 
= getSession().createQuery(queryString);
            queryObject.setParameter(
0, value);
            
return queryObject.list();
        }
 catch (RuntimeException re) {
            log.error(
"find by property name failed", re);
            
throw re;
        }

    }


    
public List findByName(Object name) {
        
return findByProperty(NAME, name);
    }


    
public List findAll() {
        log.debug(
"finding all Student instances");
        
try {
            String queryString 
= "from Student";
            Query queryObject 
= getSession().createQuery(queryString);
            
return queryObject.list();
        }
 catch (RuntimeException re) {
            log.error(
"find all failed", re);
            
throw re;
        }

    }


    
public Student merge(Student detachedInstance) {
        log.debug(
"merging Student instance");
        
try {
            Student result 
= (Student) getSession().merge(detachedInstance);
            log.debug(
"merge successful");
            
return result;
        }
 catch (RuntimeException re) {
            log.error(
"merge failed", re);
            
throw re;
        }

    }


    
public void attachDirty(Student instance) {
        log.debug(
"attaching dirty Student instance");
        
try {
            getSession().saveOrUpdate(instance);
            log.debug(
"attach successful");
        }
 catch (RuntimeException re) {
            log.error(
"attach failed", re);
            
throw re;
        }

    }


    
public void attachClean(Student instance) {
        log.debug(
"attaching clean Student instance");
        
try {
            getSession().lock(instance, LockMode.NONE);
            log.debug(
"attach successful");
        }
 catch (RuntimeException re) {
            log.error(
"attach failed", re);
            
throw re;
        }

    }

}

package com.lusm.stu.vo;

public class Student implements java.io.Serializable {

    
private Long id;
    
private String name;

    
public Student() {
    }


    
public Student(Long id, String name) {
        
this.id = id;
        
this.name = name;
    }


    
public Long getId() {
        
return this.id;
    }


    
public void setId(Long id) {
        
this.id = id;
    }


    
public String getName() {
        
return this.name;
    }


    
public void setName(String name) {
        
this.name = name;
    }


}

Student.hbm.xml

<?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"
>
<!-- 
    Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
    
<class name="com.lusm.stu.vo.Student" table="STUDENT" schema="LUSM">
        
<id name="id" type="java.lang.Long">
            
<column name="ID" precision="22" scale="0" />
            
<generator class="assigned" />
        
</id>
        
<property name="name" type="java.lang.String">
            
<column name="NAME" length="20" not-null="true" />
        
</property>
    
</class>
</hibernate-mapping>

package com.lusm.test;

import java.util.Iterator;
import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;

import com.lusm.hib.factory.HibernateSessionFactory;
import com.lusm.stu.vo.Student;

public class Test {
    
public static void main(String[] args) {
        Session session 
= HibernateSessionFactory.getSession();
        String sql 
= "from Student";
        Query query 
= session.createQuery(sql);
        List list 
= query.list();
        session.close();
        Iterator i 
= list.iterator();
        System.out.println(
"id"+"\t"+"name");
        System.out.println(
"---------------");
        
while (i.hasNext()) {
            Student stu 
= (Student) i.next();
            System.out.println(stu.getId() 
+ "\t" + stu.getName());
        }


    }

}


hibernate.cfg.xml

<?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"
>

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

    
<session-factory>
        
<property name="connection.username">test</property>
        
<property name="connection.url">
            jdbc:oracle:thin:@localhost:1521:oracle
        
</property>
        
<property name="dialect">
            org.hibernate.dialect.Oracle9Dialect
        
</property>
        
<property name="myeclipse.connection.profile">
            Oracle
        
</property>
        
<property name="connection.password">123456</property>
        
<property name="connection.driver_class">
            oracle.jdbc.OracleDriver
        
</property>
        
<property name="show_sql">true</property>
        
<mapping resource="com/lusm/stu/vo/Student.hbm.xml" />

    
</session-factory>

</hibernate-configuration>


运行结果是

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.

Hibernate: select student0_.ID as ID0_, student0_.NAME as NAME0_ from LUSM.STUDENT student0_
id    name
---------------
1    aaaaa
2    bbbbb
3    ccccc

请注意:如果你在运行过程中出现找不到HibernateSessionFactory,或者提示日志文件错误时候,请看下个文章!


地震让大伙知道:居安思危,才是生存之道。
posted on 2007-09-14 21:37 小寻 阅读(799) 评论(0)  编辑  收藏 所属分类: j2se/j2ee/j2me

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