为什么返回arraylist的方法返回相同的值?

时间:2014-09-08 09:19:21

标签: java hibernate list arraylist

我正在使用Hibernate,我编写了一个返回数组列表的方法,该查询应返回11个对象(行),但这里返回11个相同的对象(我的意思是11行相同)。 这是我的代码。

ArrayList<HistoryLatitudeBean> vehicleHistoryDetails = new ArrayList<HistoryLatitudeBean>();

vehicleHistoryDetails=FetchVehicleHistDetails.getVehicleHistory(selectedVehicle,frmDate,toDate);

getVehicleHistory()方法如下,

public static ArrayList<HistoryLatitudeBean> getVehicleHistory(String selectedVehicle, Date frmDate, Date toDate) {
    Session session = HibernateSession.getHibernateSession();

    // Starting Transaction
    Transaction transaction = session.beginTransaction();
    String hql = null;
    ArrayList<HistoryLatitudeBean> vehicleHistoryList = new ArrayList<HistoryLatitudeBean>();
    try {

         hql="FROM HistoryLatitudeBean where vehicleno=:vehicleno and rdate BETWEEN :fromdate and :todate ";
         Query query =session.createQuery(hql);
        query.setParameter("vehicleno", 12);
        query.setParameter("fromdate", frmDate);
        query.setParameter("todate", toDate);
        List<HistoryLatitudeBean> groupList = (List<HistoryLatitudeBean>)query.list();

       //--->Here I checked through debug point , all object are same.

        for(HistoryLatitudeBean arr : groupList){
            vehicleHistoryList.add(arr);     


        }
        transaction.commit();

    } catch (Exception e) {
        if (transaction!=null) transaction.rollback();
        e.printStackTrace();
    }
    finally{

        session.close();
    }

    return vehicleHistoryList;
}

任何人都可以告诉我。这对我很有帮助。谢谢。

0 个答案:

没有答案