Hibernate查询方式:HQL和Criteria

1.HQL查询方法一般使用的比较多,一般是通过query方式来查询的.例子如下:
/** 
     * 根据名字来查询 
     *  
     * @param name 
     */ 
    static void query(String name) {  
        Session s = null;  
        try{  
            s = HibernateUtil.getSession();  
//          String hql = "from User as user where user.name=?";  
            String hql = "from User as user where user.name=:name";//采用这种方式的时候,就用setString(String,String)  
            Query query = s.createQuery(hql);  
            query.setString("name", name);  
            List list = query.list();  
            //查询从某一条开始到某一条的分页  
            query.setFirstResult(10);  
            query.setMaxResults(20);  
            for(int i = 0;i<list.size();i++){  
                System.out.println(list.get(i));  
            }  
        }finally{  
            if(s!=null){  
                s.close();  
            }  
        }  
    } 

2.而Criteria是一种比HQL更面向对象的查询方式:

   创建方式如下:Criteria crit = session.createCriteria(Object.class);

                       crit.add(Restrictions.eqProperty(a,b));
:
static void query(String name) {  
        Session s = null;  
        try{  
            s = HibernateUtil.getSession();  
            Criteria c = s.createCriteria(User.class);  
            c.add(Restrictions.eq("name", name));  
            c.add(Restrictions.gt("birthday", new Date()));  
            List list = c.list();  
            for(int i = 0;i<list.size();i++){  
                System.out.println(list.get(i));  
            }  
        }finally{  
            if(s!=null){  
                s.close();  
            }  
        }  
    }