How to compare dates in hibernate

Question

In my Data base dates are as 2012-04-09 04:02:53 2012-04-09 04:04:51 2012-04-08 04:04:51, etc, I need to retrieve data which have curr

Answer 1

How-to do it in Hibernate has already been said. You can prepare the Timestamp objects in the Java code using, for example, the following aproach:

Calendar cFrom = Calendar.getInstance();
cFrom.setTime(new Date()); /* today */
cFrom.set(Calendar.HOUR_OF_DAY, 0);
cFrom.set(Calendar.MINUTE, 0);
cFrom.set(Calendar.SECOND, 0);
cFrom.set(Calendar.MILLISECOND, 0);
Timestamp from = new Timestamp(cFrom.getTime().getTime());
Calendar cTo = Calendar.getInstance();
cTo.setTime(new Date()); /* today */
cTo.set(Calendar.HOUR_OF_DAY, 23);
cTo.set(Calendar.MINUTE, 59);
cTo.set(Calendar.SECOND, 59);
cTo.set(Calendar.MILLISECOND, 999);
Timestamp to = new Timestamp(cTo.getTime().getTime());

final String QUERY = ""
  + "SELECT tr "
  + "FROM Type tr "
  + "WHERE tr.timestamp >= :timestampFrom AND tr.timestamp <= :timestampTo";
Query query = entityManager.createQuery(QUERY);
query.setParameter("timestampFrom", from);
query.setParameter("timestampTo", to);
@SuppressWarnings("unchecked")
List ts = (List)query.getResultList();