Java在当前时间上加减五天不计周末

忽略周六日添加或者减少指定天数

代码实现

public static void main(String[] args) {
        Calendar cal = Calendar.getInstance();
        Date date = new Date();
        cal.setTime(date);
        int week = cal.get(Calendar.DAY_OF_WEEK) - 1;
        int amount = 5;//正数为加天数 负数为减天数 qq1023732997
        if (amount >= 0) {
            if (week == 6) {
                amount = amount + ((amount - 1) / 5) * 2 + 1;
            } else {
                amount = amount + (((week + amount) - 1) / 5) * 2;
            }
        } else {
            if (week == 0) {
                amount = amount - ((-amount - 1) / 5) * 2 - 1;
            } else {
                amount = amount - ((-(amount + week) + 5) / 5) * 2;
            }
        }
        cal.add(Calendar.HOUR, amount * 24);
        date = cal.getTime();
        System.out.println(date);
        SimpleDateFormat s = new SimpleDateFormat("yyyy-MM-dd");
        System.out.println(s.format(date));
    }

当前时间为4-24加五天就是4-29

4-26加5天 5-3