在Spark中填写给定日期间隔内缺少的周(Scala)

import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.functions._

// 创建SparkSession
val spark = SparkSession.builder()
  .appName("Missing Weeks in Spark")
  .getOrCreate()

// 导入隐式转换
import spark.implicits._

// 定义函数来生成给定日期范围内的所有日期
def getDates(startDate: String, endDate: String): Seq[String] = {
  import java.time.LocalDate
  import java.time.format.DateTimeFormatter

  val formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd")
  val start = LocalDate.parse(startDate, formatter)
  val end = LocalDate.parse(endDate, formatter)

  val dates = Iterator.iterate(start)(_ plusWeeks 1)
    .takeWhile(!_.isAfter(end))
    .map(_.format(formatter))
    .toSeq

  dates
}

// 定义给定日期范围
val startDate = "2022-01-01"
val endDate = "2022-12-31"

// 生成给定日期范围内的所有日期
val allDates = getDates(startDate, endDate)

// 创建包含所有日期的DataFrame
val allDatesDF = allDates.toDF("date")

// 创建包含缺少的周的DataFrame
val missingWeeksDF = allDatesDF
  .withColumn("week", weekofyear($"date"))
  .groupBy("week")
  .agg(count("*").as("count"))
  .filter($"count" < 7)
  .select("week")

// 打印缺少的周
missingWeeksDF.show()