hibernate select 读取结果集的两种办法

第一种：推荐：

DAO层的Hql语句如果用From.....执行出来的是一个基于Map结构的List,而用select.........执行出来的结果不是Map型的，为了方便使用、维护修改，将其转为基于Map的List。

DAO层代码如下： 

public List getSlCountList(Integer year, Integer month, String office) {
    Session session = getSession();
    String hql="SELECT office,count(*) as myCount from ReportMonth "
        + "Where (year = ?) AND (month = ?) And (office like ?) And(slsn <>'') "
        + "Group by office";
    List list = null;
    List newList=new ArrayList();
    Object[] obj;
    try {
        Query query = session.createQuery(hql);
        query.setParameter(0, year);
        query.setParameter(1, month);
        query.setParameter(2, "%" + office + "%");
        list = query.list();
        for(int i=0;i
            Map map = new HashMap();
            obj = (Object[])list.get(i);
            map.put("office", (String)obj[0]);
            map.put("myCount", (Integer)obj[1]);
            newList.add(map);
        }

     } catch (HibernateException e1) {
         newList=null;
        e1.printStackTrace();
    }
    finally{
        session.close();
    }
    return newList;
}

JSP部分代码如下：  

"#request['slCountList']" id="slCountList">
  class="tr0">
      "26" width="15%"> "#slCountList.office"/>
..................

 

第二种：DAO代码简洁，但是在JSP中用obj［0］obj［1］表示，感觉不好，晦涩。

 DAO：

public List getSlCountList(Integer year, Integer month, String office) {
    Session session = getSession();
    String hql="SELECT office,count(*) as myCount from ReportMonth "
        + "Where (year = ?) AND (month = ?) And (office like ?) And(slsn <>'') "
        + "Group by office";
    List list = null;
    try {
        Query query = session.createQuery(hql);
        query.setParameter(0, year);
        query.setParameter(1, month);
        query.setParameter(2, "%" + office + "%");
        list = query.list();
     } catch (HibernateException e1) {
         list=null;
        e1.printStackTrace();
    }
    finally{
        session.close();
    }
    return list;
}

JSP：

    "#request['slCountList']" id="slCountList">
        class="tr0">
            "26" width="15%"> "#slCountList[0]"/>"red">("#slCountList[1]"/>座)
            "90%">
.......................