JAVA获取两个时间段的重叠区间-创新互联

public static LocalDate[] overLappingDay(LocalDate i1Start, LocalDate i1End, LocalDate i2Start, LocalDate i2End) {
    if (i1End.isBefore(i1Start) || i2End.isBefore(i2Start)) {
        return null;
    } else {
        if (i1End.isBefore(i2Start) || i2End.isBefore(i1Start)) {
            // no overlap
            return null;
        } else {
            LocalDate laterStart = Collections.max(Arrays.asList(i1Start, i2Start));
            LocalDate earlierEnd = Collections.min(Arrays.asList(i1End, i2End));
            return new LocalDate[] {laterStart, earlierEnd};
        }
    }
}

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