java 분할 날짜 시간대 코드

/**
 * @author dy
 * @since 2016-09-18 & JDK 1.8.0_91
 */
public class DateCalculate {
  static Logger logger = LoggerFactory.getLogger(DateCalculate.class);

  /**
   *  
   *
   * @param dateType   M/D/H/N --> / / / 
   * @param start yyyy-MM-dd HH:mm:ss
   * @param end  yyyy-MM-dd HH:mm:ss
   * @return
   */
  public static List<String> cutDate(String dateType, String start, String end) {
    try {
      SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
      Date dBegin = sdf.parse(start);
      Date dEnd = sdf.parse(end);
      return findDates(dateType, dBegin, dEnd);
    } catch (Exception e) {
      logger.error(e.getMessage(), e);
    }
    return null;
  }

  public static List<String> findDates(String dateType, Date dBegin, Date dEnd) throws Exception {
    List<String> listDate = new ArrayList<>();
    Calendar calBegin = Calendar.getInstance();
    calBegin.setTime(dBegin);
    Calendar calEnd = Calendar.getInstance();
    calEnd.setTime(dEnd);
    while (calEnd.after(calBegin)) {
      switch (dateType) {
        case "M":
          calBegin.add(Calendar.MONTH, 1);
          break;
        case "D":
          calBegin.add(Calendar.DAY_OF_YEAR, 1);break;
        case "H":
          calBegin.add(Calendar.HOUR, 1);break;
        case "N":
          calBegin.add(Calendar.SECOND, 1);break;
      }
      if (calEnd.after(calBegin))
        listDate.add(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(calBegin.getTime()));
      else
        listDate.add(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(calEnd.getTime()));
    }
    return listDate;
  }


  public static void main(String[] args) {
    String start = "2016-02-01 00:00:00";
    String end = "2016-03-02 00:00:00";
    List<String> list = cutDate("D", start, end);
    for (String str :list){
      System.out.println(str);
    }
  }
}