滑动窗口采用的是guava中提供的Range数据结构

里面存取的是一段时间范围

public static Range<Long> buildRange(int minInterval, Integer windowRange, Integer windowSize, LocalDateTime time) {
        long ts = time.toEpochSecond(ZoneOffset.of("+8"));
        ts /= windowRange;
        ts *= windowRange;
        long endTime = ts - minInterval;
        long startTime = endTime - windowRange * windowSize;
        return Range.closedOpen(startTime, endTime); // 前闭后开的时间范围
    }