JAVA : USE CALENDAR

 boolean isAvailableDate(EventMainBean eventMain) throws Exception{
  boolean result = false;
  
  String pattern = "yyyyMMdd";

  Calendar calendar = Calendar.getInstance();
  
  SimpleDateFormat formatter = new SimpleDateFormat(pattern, new Locale("ko","KOREA"));
  
  Date stDate = formatter.parse(eventMain.getDistributionStDate());
  Date edDate = formatter.parse(eventMain.getDistributionEdDate());
  
  Calendar stDateInCalendar = (Calendar)calendar.clone();
  stDateInCalendar.setTime(stDate);
  
  Calendar edDateInCalendar = (Calendar)calendar.clone();
  edDateInCalendar.setTime(edDate);
  edDateInCalendar.add(Calendar.DATE, 1);
  
  if ( calendar.after(stDateInCalendar) && calendar.before(edDateInCalendar) ) 
   result = true ;
  
  System.out.println(calendar.after(stDateInCalendar));
  System.out.println(calendar.before(edDateInCalendar));
  System.out.println(result);
  return result;
 }