4 Hibernate HQL查询,分页查询

 

    /**  
     * HQL查询的一个例子  
   */  
    public static void hql()   
    {   
        Session s = null;   
  
        try  
        {   
            s = HibernateUtil.getSeesion();   
            //final String hql = "from User as u where u.name=?";   
            final String hql = "from User as u where u.name=:name";   
            final Query query = s.createQuery(hql);   
            //query.setString(0, "北京市");  //从0开始   
        	query.setString("name", "北京市");   
            final List<User> list = query.list();   
            for (final User u : list)   
            {   
                System.out.println(u.getName());   
            }   
        }   
        finally  
        {   
            if (s != null)   
            {   
                s.close();   
            }   
        }   
        System.out.println("HQL完成");   
    }  

 

 

HibernateUtil工具类

package dao;   
  
import org.hibernate.Session;   
import org.hibernate.SessionFactory;   
import org.hibernate.cfg.Configuration;   
  
/**  
 * 这是一个工具类, 快速取得session  
 *   
 */  
public class HibernateUtil   
{   
    static SessionFactory   sessionFactory  = null;   
    static  
    {   
        final Configuration cfg = new Configuration();   
        cfg.configure(); //路径可以改变   
        sessionFactory = cfg.buildSessionFactory();   
    }   
  
    public static SessionFactory getSessionFactory()   
    {   
        return sessionFactory;   
    }   
  
    /**  
     * 取得session  
     *   
     * @return session  
     */  
    public static Session getSeesion()   
    {   
        return sessionFactory.openSession();   
    }   
}  

 

 

/** 
* HQL 分页查询 
*/ 
public static void page() 
{ 
	Session s = null; 
	try 
	{ 
		s = HibernateUtil.getSeesion(); 
		final String hql = " from User "; //User是类名 
		final Query q = s.createQuery(hql); 
		q.setFirstResult(0); //从第0条开始 
		q.setMaxResults(10); //取出10条 
		final List list = q.list(); 
		for (final User u : list) 
		{ 
			System.out.println(u.getId() + " " + u.getName()); 
		} 

	} 
	finally 
	{ 
		s.clear(); 
	} 
}

 

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1 楼 zzjess 2016-08-09  

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