时间以半点为单位相连的算法

背景

在做广点通信息流数据获取的时候有这么一个字段：time_series 投放时间段，格式为 48 * 7 位字符串，且都为 0 和 1，以半个小时为最小粒度，从周一零点开始至周日 24 点结束。0 为不投放，1 为投放，全传 1 视为全时段投放，不允许全部传 0。朋友圈广告的投放时间需大于等于 6 小时，小于等于 30 个自然日，且每天投放的时段需保持一致。在实际的数据获取返回结果为：

需求方提出需要将此字段进行格式化，格式化后的字段格式为：

[1, 2, 3, 4, 5, 6, 7]7:00-13:30,17:00-24:00

方法

由于时间比较紧促，简单写了个方法记录下，后面再回来

private String formatTimeSeries(String timeSeries)
    {
        Map<Integer, List<String>> weekTimeMap = new LinkedHashMap<>();
        if(!timeSeries.matches("[0-1]{336}")) {
            return "";
        }
        for (int i = 0; i < timeSeries.length(); i++) {
            if(!String.valueOf(timeSeries.charAt(i)).equals("1")) {
                continue;
            }
            int day = i/48 + 1;
            List<String> list = weekTimeMap.get(day);
            if(null == list) {
                list = new ArrayList<>();
            }
            list.add((i%48)/2+(i%48%2==1?":30":":00"));
            weekTimeMap.put(day,list);
        }
        Map<String, List<Integer>> timeWeekMap = new HashMap<>();
        for(Integer i : weekTimeMap.keySet()){
            List<String> list = weekTimeMap.get(i);
            String formatTimeSeries = "";
            while (list.size() > 0) {
                String startTime = list.get(0);
                list.remove(0);
                String startHour = startTime.split(":")[0];
                String startMinute = startTime.split(":")[1];
                String endTime = startMinute.equals("30") ? (Integer.valueOf(startHour) + 1) + ":00" : startHour + ":30";
                while (list.contains(endTime)) {
                    list.remove(endTime);
                    String endHour = endTime.split(":")[0];
                    String endMinute = endTime.split(":")[1];
                    endTime = endMinute.equals("30") ? (Integer.valueOf(endHour) + 1) + ":00" : endHour + ":30";
                }
                formatTimeSeries += (formatTimeSeries.length() == 0 ? "" : ",") + startTime + "-" + endTime;
            }
            List<Integer> timeList = timeWeekMap.get(formatTimeSeries);
            if(null == timeList) {
                timeList = new ArrayList<>();
            }
            timeList.add(i);
            timeWeekMap.put(formatTimeSeries, timeList);
        }
        String formatTimeSeries = "";
        for(String time : timeWeekMap.keySet()){
            formatTimeSeries += (formatTimeSeries.length() == 0 ? "" : ";") + timeWeekMap.get(time).toString() + time;
        }
        return formatTimeSeries;
    }