import spark.implicits报红、不能导入

 我这里SparkSession.builder()的变量名是session,下面导入的时候就需要导入session.implicits._

import org.apache.spark.rdd.RDD
import org.apache.spark.sql.{Dataframe, SparkSession}

object Practice {
    def main(args: Array[String]): Unit = {
        //我这里的变量名是session,下面导入的时候就需要导入session.implicits._
        val session: SparkSession = SparkSession.builder().appName("Test").master("local").getOrCreate()
        val RDD: RDD[Int] = session.sparkContext.makeRDD(List(1, 2, 3))
        //RDD转Dataframe
        import session.implicits._
        RDD.toDF()
    }
}