错误: bulkCopyToSqlDB不是org.apache.spark.sql.DataFrameWriter的成员

import org.apache.spark.sql.{DataFrame, SparkSession}

val spark = SparkSession.builder()
  .appName("Write DataFrame to SQL Database")
  .config("spark.some.config.option", "some-value")
  .getOrCreate()

val df: DataFrame = ???

df.write
  .format("jdbc")
  .option("url", "jdbc:postgresql://localhost/mydatabase")
  .option("dbtable", "mytable")
  .option("user", "myuser")
  .option("password", "mypassword")
  .save()