使用java获取当前日期后几天内的工作日和节假日数

使用java获取当前日期后几天内的工作日和节假日数

 public static String getWorkDayStart(Date startDay, int num) throws Exception {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(startDay);
        int startWeekDay = calendar.get(Calendar.DAY_OF_WEEK);
        calendar.add(Calendar.DATE, num);
        int endWeekDay = calendar.get(Calendar.DAY_OF_WEEK);
        //节假日数
        int holidayNum = 0;
        //工作日数
        int workdayNum = 0;
        int number;
        if(startWeekDay > endWeekDay){
            number = endWeekDay - startWeekDay + 8;
        }else{
            number = endWeekDay - startWeekDay + 1;
        }
        if(number != 0){
            for(int i = 0;i < (num < 7?num+1:number);i++){
                if(calendar.get(Calendar.DAY_OF_WEEK) == 7 || calendar.get(Calendar.DAY_OF_WEEK) == 1){
                    holidayNum++;
                }else {
                    workdayNum++;
                }
                calendar.add(Calendar.DATE, -1);
            }
        }
        if(num >= 7){
            holidayNum = holidayNum + 2 * (num - number + 1) / 7;
            workdayNum = workdayNum + 5 * (num - number + 1) / 7;
        }
        return holidayNum + "," + workdayNum;
    }