以long的格式增加num个年/月/日
/** * 描述：以long的格式增加num个年 * @param currentTm * @param num * @return */public static long addYear(long currentTm, int num){long newTm = 0;Calendar cale = Calendar.getInstance();Date date = new Date();date.setTime(currentTm);cale.setTime(date);cale.add(Calendar.YEAR, num);newTm = cale.getTime().getTime();return newTm;}/** * 描述：以long的格式增加num个月 * @param currentTm * @param num * @return */public static long addMonth(long currentTm, int num){long newTm = 0;Calendar cale = Calendar.getInstance();Date date = new Date();date.setTime(currentTm);cale.setTime(date);cale.add(Calendar.MONTH, num);newTm = cale.getTime().getTime();return newTm;}/** * 描述：以long的格式增加num天 * @param currentTm * @param num * @return */public static long addDay(long currentTm, int num){long newTm = 0;Calendar cale = Calendar.getInstance();Date date = new Date();date.setTime(currentTm);cale.setTime(date);cale.add(Calendar.DATE, num);newTm = cale.getTime().getTime();return newTm;}?