/*
현재날짜에서 Add day 구하는 함수
*/
public static String getAddDt(int day){
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentDateandTime = sdf.format(new Date());
Date date = new Date();
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.DATE, day);
String strDate = sdf.format(cal.getTime());
return strDate;
}