/** * @author dy * @since 2016-09-18 & JDK 1.8.0_91 */public class DateCalculate {  static Logger logger = LoggerFactory.getLogger(DateCalculate.class);  /**   * 切割時間段   *   * @param dateType 交易類型 M/D/H/N -->每月/每天/每小時/每分鐘   * @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);    }  }}