방법1

String inDate   = new java.text.SimpleDateFormat("yyyyMMdd").format(new java.util.Date());
String inTime   = new java.text.SimpleDateFormat("HHmmss").format(new java.util.Date());

방법2

Calendar calendar = Calendar.getInstance();
            java.util.Date date = calendar.getTime();
            String today = (new SimpleDateFormat("yyyyMMddHHmmss").format(date));