Hibernate查询未检索结果？

Question

Here is bean class,

@Entity
@Table(name="hlatlng")
public class HistoryLatitudeBean {
@Id
@GeneratedValue
@Column(name = "id")
private int id;
@Column(name="vehicleno")
private int vehicleno;
@Column(name="lat")
private String lat;
@Column(name="lng")
private String lng;
@Column(name="status")
private String status;
@Column(name="rdate")
private Date rdate;
@Column(name="rtime")
private Date rtime;
//getter setter,
}

In Hibernate method I am writing,

          Map<String, Object> parameterNameAndValues = new HashMap<String, Object>();

          parameterNameAndValues.put("vehicleno", 12);
          parameterNameAndValues.put("frmdate", frmDate);
          parameterNameAndValues.put("todate", toDate);

          hql= "from HistoryLatitudeBean where vehicleno=:vehicleno and rdate BETWEEN :frmdate and :todate";
          Query query =session.createQuery(hql);
            /*query.setParameter("vehicleno", 12);
            query.setParameter("frmdate", frmDate);
            query.setParameter("todate", toDate);*/


          for (Entry<String, Object> e : parameterNameAndValues.entrySet()) {
                query.setParameter(e.getKey(), e.getValue());
            }

            List<HistoryLatitudeBean> groupList = (List<HistoryLatitudeBean>)query.list();

            //Here groupList contains null              

             for(HistoryLatitudeBean arr : groupList){
                 vehicleHistoryList.add(arr);    
                 System.out.println("List :"+arr.getLat());
                }


             transaction.commit();

Problem is query.list() method returns null. The same query I am trying in mysql db as, SELECT * FROM hlatlng WHERE vehicleno='12' AND rdate BETWEEN '2014-01-01' AND '2014-09-01';

and my table structure is like this,

CREATE TABLE `hlatlng` (
 `vehicleno` int(40) DEFAULT NULL,
 `lat` varchar(40) DEFAULT NULL,
 `lng` varchar(40) DEFAULT NULL,
 `status` varchar(40) DEFAULT NULL,
 `rdate` date DEFAULT NULL,
 `rtime` date DEFAULT NULL,
 `id` int(40) NOT NULL AUTO_INCREMENT,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1

It gives me 3 rows. I am not getting what is wrong in my code , can any one help me in this please.

Answer 1

The Date in java will have the time part associated with it. If our data is only on dates, we need to trim the time part.

Adding the @Type(type="date") will take care of this while sending it to the database.

I tried to find a reference, unfortunately I could not find anything.