我想按时间选择实体.
我有字段类型为DATE的Oracle DBMS,其中包含日期和时间.这是我的代码.如何按时间标准选择数据？

Calendar timeCal = new GregorianCalendar(0,0,0,0,0,0);
Date     timeMin = timeCal.getTime();

timeCal.add(Calendar.HOUR_OF_DAY, 1);
Date     timeMax = timeCal.getTime();

if (minDate != null && maxDate != null)
    criteria.add(Restrictions.between("eventDate", minDate, maxDate));

if (onDate != null) {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(onDate);
    calendar.add(Calendar.DAY_OF_MONTH, 1);
    criteria.add(Restrictions.between("eventDate", onDate, calendar.getTime()));
}

if(minTime!=null&&maxTime!=null){
    /*
      How to add Restriction on eventDate field, for time only?
      if minTime is 3:00 and maxTime is 16:00, must to return
      all rows having the time part of their eventDate between 
      3:00 and 16:00, regardless of the date part
    */
}

解决方法:

我找到答案.只需要使用sqlRestriction.

criteria.add(
    Restrictions.sqlRestriction(
        " NUMTODSINTERVAL(EVENT_DATE - TRUNC(EVENT_DATE), 'DAY') BETWEEN  NUMTODSINTERVAL (?,'SECOND') AND NUMTODSINTERVAL (?,'SECOND')",
        new Object[] { secondsForBegin, secondsForEnd },
        new Type[]   { StandardBasicTypes.INTEGER, StandardBasicTypes.INTEGER }));