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：000000000000001111111111111000000011111111111111000000000000001111111111111000000011111111111111000000000000001111111111111000000011111111111111000000000000001111111111111000000011111111111111000000000000001111111111111000000011111111111111000000000000001111111111111000000011111111111111000000000000001111111111111000000011111111111111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; }