前端传一个年份，可以返回这一年的所有日期的list集合

//    获取一年的工作日
    public static List getYearDays(String year){
        List<String> CalList = new ArrayList<>();
        //请注意月份是从0-11,天数是1， 2013-1-1 至 2013-12-31
        Calendar start = Calendar.getInstance();
        start.set(Integer.parseInt(year), 0, 1); //2013-1-1 开始
        Calendar end = Calendar.getInstance();
        end.set(Integer.parseInt(year)+1, 0, 0); // 2014--0-0结束，2014-1-1不算

        int sumSunday = 0;
        int sumSat = 0;
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");

        while(start.compareTo(end) <= 0) {
            int w = start.get(Calendar.DAY_OF_WEEK);
            if(w == Calendar.SUNDAY)
                sumSunday ++;
            if(w == Calendar.SATURDAY)
                sumSunday ++;
            //打印每天
            CalList.add(format.format(start.getTime()));
//            System.out.println(format.format(start.getTime()));
            //循环，每次天数加1
            start.set(Calendar.DATE, start.get(Calendar.DATE) + 1);
        }
        return CalList;

    }