如果你的路径是一个字符串，你可以用正则表达式分解它，然后用date减去你需要的天数
下面是一个简单的例子：

val myPathAsString = "s3://input_bucket/my_dir/2021/03/21/00"

val pathPattern = """(\w*:\/\/\w*\/\w*)\/(\d{4}\/\d{2}\/\d{2})\/(\w*)""".r
val dateFormat = "yyyy/MM/dd"
val dtf = java.time.format.DateTimeFormatter.ofPattern(dateFormat)

myPathAsString match {
  case pathPattern(prev, date, suffix) => {
  val newDate = java.time.LocalDate.parse(date, dtf).minusDays(1)
  s"$prev/${newDate.format(dtf)}/$suffix"
}
case _ => myPathAsString
}