指定时间向前向后添指定年、月、日

指定时间向前向后加指定年、月、日

/**
  * 修改指定时间
  *
  * @author Lyq
  * @date Mar 10, 2011 2:20:35 PM
  * @version V 1.0
  * @param ParamDate
  * @param month  向前几个月
  * @param day 向前几天
  * @param month0 向后几个月
  * @param day0 向后几天
  * @return
  */
 @SuppressWarnings("static-access")
 public static String changeCurrentDay(String ParamDate, int BeforMonths, int BeforDays, int AfterMonths, int AfterDays) {
  String mat = "yyyy-MM-dd";
  SimpleDateFormat sdf = new SimpleDateFormat(mat);
  String changeDay = "";

  Calendar c = new GregorianCalendar();
  if (StringUtils.isBlank(ParamDate)) {
   c.setTime(new Date());
  } else {
   try {
    c.setTime(sdf.parse(ParamDate));
   } catch (ParseException e) {
    e.printStackTrace();
   }
  }

  // String currentDay = c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-"
  // + c.get(c.DATE);
  if (BeforMonths > 0) {
   c.add(c.MONTH, -BeforMonths);
  }
  if (BeforDays > 0) {
   c.add(c.DATE, -BeforDays);
  }
  if (AfterMonths > 0) {
   c.add(c.MONTH, AfterMonths);
  }
  if (AfterDays > 0) {
   c.add(c.DATE, AfterDays);
  } else if (AfterDays <0) {
   c.add(c.DATE, AfterDays);
  }
  String newDate = c.get(c.YEAR) + "-" + (c.get(c.MONTH) + 1) + "-" + c.get(c.DATE);
  try {
   changeDay = sdf.format(sdf.parse(newDate));
  } catch (ParseException e) {
   e.printStackTrace();
  }
  return changeDay;
 }