時間以半點為單位相連的演算法
背景
在做廣點通訊息流資料獲取的時候有這麼一個欄位:time_series 投放時間段,格式為 48 * 7 位字串,且都為 0 和 1,以半個小時為最小粒度,從週一零點開始至週日 24 點結束。0 為不投放,1 為投放,全傳 1 視為全時段投放,不允許全部傳 0。朋友圈廣告的投放時間需大於等於 6 小時,小於等於 30 個自然日,且每天投放的時段需保持一致。在實際的資料獲取返回結果為:
需求方提出需要將此欄位進行格式化,格式化後的欄位格式為:
[1, 2, 3, 4, 5, 6, 7]7:00-13:30,17:00-24:00
方法
由於時間比較緊促,簡單寫了個方法記錄下,後面再回來
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; }