LocalDateTime之间差多少天

要计算两个 LocalDateTime 之间的天数差异，可以使用 getTime 方法来获取两个 LocalDateTime 对象之间的毫秒数差异，然后将其转换为天数。根据引用，可以使用以下代码来计算 LocalDateTime 之间的天数差异：

private static long[] getTime(LocalDateTime dob, LocalDateTime now) {
    long diffInMilli = ChronoUnit.MILLIS.between(dob, now);
    long diffInDays = TimeUnit.DAYS.convert(diffInMilli, TimeUnit.MILLISECONDS);
    return new long[]{diffInMilli, diffInDays};
}

public static void main(String[] args) {
    LocalDateTime dob = LocalDateTime.of(1990, 1, 1, 0, 0);
    LocalDateTime now = LocalDateTime.now();

    long[] timeDiff = getTime(dob, now);
    long daysDiff = timeDiff<span class="em">1</span><span class="em">2</span><span class="em">3</span><span class="em">4</span>