Day of Month

public class DateUtils {
   private final static Log log = LogFactory.getLog(DateUtils.class);
 
   public static Timestamp getTimestampValue(String param) throws ParseException {
      SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.SSS");
      java.util.Date date = sdf.parse(param);
      java.sql.Timestamp timeStampValue = new java.sql.Timestamp(date.getTime());
      return timeStampValue;
   }
 
   public int getIntValue(String param) {
      return Integer.parseInt(param);
   }
 
   public static String getBeforeDateTimestamp(int day) {
      Date d = new Date();
      SimpleDateFormat formatter;
      formatter = new SimpleDateFormat("yyyy-MM-dd");
      return formatter.format(new Date(d.getTime() - 60 * 60 * 24 * 1000L * day));
   }
 
   public static long getCurrentDateTimeMillis() {
      Calendar cal = Calendar.getInstance();
      SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
      Date date = null;
      try {
         date = sdf.parse(String.format("%d-%d-%d", cal.get(Calendar.YEAR),
            cal.get(Calendar.MONTH) + 1,
            cal.get(Calendar.DATE)));
      } catch (ParseException e) {
         log.fatal(e.getMessage());
      }
      return date.getTime();
   }
 
   public static int getDayOfMonth() {
      return new GregorianCalendar().get(Calendar.DAY_OF_MONTH);
   }
 
   public static int getBeforeDayOfMonth(int beforeDay) {
      GregorianCalendar gc = new GregorianCalendar();
      gc.add(gc.DATE, -beforeDay);
      return gc.get(Calendar.DAY_OF_MONTH);
   }
 
   public static int getMinute() {
      return new GregorianCalendar().get(Calendar.MINUTE);
   }
 
   public static int getHourOfDay() {
      return new GregorianCalendar().get(Calendar.HOUR_OF_DAY);
   }
}