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

Like this?

criteria.add(Expression.eq("yourDate", aDate))

Answer 2

Use Restrictions.between() to generate a where clause which the date column is between '2012-04-09 00:00:00' and '2012-04-09 23:59:59'

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date fromDate = df.parse("2012-04-09 00:00:00");
Date toDate = df.parse("2012-04-09 23:59:59");

criteria.add(Restrictions.between("dateField", fromDate, toDate));

Please note that all the properties used in the Criteria API is the Java property name , but not the actual column name.

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Update: Get fromDate and toDate for the current date using JDK only

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
Date fromDate = calendar.getTime();

calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
Date toDate = calendar.getTime();

criteria.add(Restrictions.between("dateField", fromDate, toDate));

Answer 3

The following code will work

Calendar fromDate = Calendar.getInstance();
fromDate.setTime(new Date());
fromDate.set(Calendar.HOUR_OF_DAY, 0);
fromDate.set(Calendar.MINUTE, 0);
fromDate.set(Calendar.SECOND, 0);
fromDate.set(Calendar.MILLISECOND, 0);

Calendar toDate = Calendar.getInstance();
toDate.setTime(new Date());
toDate.set(Calendar.HOUR_OF_DAY, 23);
toDate.set(Calendar.MINUTE, 59);
toDate.set(Calendar.SECOND, 59);
toDate.set(Calendar.MILLISECOND, 999);

criteria.add(Restrictions.between("loadDate", fromDate.getTime(),
                    toDate.getTime()));

Answer 4

fromDate.setTime(new Date());
fromDate.set(Calendar.HOUR_OF_DAY, 0);
fromDate.set(Calendar.MINUTE, 0);
fromDate.set(Calendar.SECOND, 0);
fromDate.set(Calendar.MILLISECOND, 0);

This code is extremely dangerous ... if the day is switch to daylight saving time (e.g. 06.04.1980) you end up in following exception!!!

 java.lang.IllegalArgumentException: HOUR_OF_DAY: 0 -> 1day


HQL: from human pat where year(pat.birthdate) = :start_day and month(pat.birthdate) = :start_month and year(pat.birthdate) = :start_year ");

params.put("start_day", startDate.get(Calendar.DAY_OF_MONTH));
params.put("start_month", startDate.get(Calendar.MONTH) + 1);
params.put("start_year", startDate.get(Calendar.YEAR));

The year/month/day functions use the underlying db functions (extract, ...) and compares only these values. Therefore I did not need to set the time to 0 which leads to the above described exception. just an example out of my mind how I solved the problem! Maybe it helps

Answer 5

The easiest way is to fetch all records having date between the beginning and end of a given day:

WHERE date BETWEEN :from AND :to

And compute from and to in your Java code.

For computing midnights:

import static org.apache.commons.lang.time.DateUtils.ceiling;
import static org.apache.commons.lang.time.DateUtils.truncate;

Date someDay = new Date();
Date from = truncate(someDay, Calendar.DAY_OF_MONTH);
Date to = new Date(ceiling(someDay, Calendar.DAY_OF_MONTH).getTime() - 1);

Answer 6

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<Type> ts = (List<Type>)query.getResultList();