Give the error code first

def main(args: Array[String]): Unit = {
        //Create SparkConf() And Set AppName
      SparkSession.builder()
                .appName("Spark Sql basic example")
                .config("spark.some.config.option", "some-value")
                .getOrCreate()
 
        //import implicit DF,DS
        import spark.implicits._ //Here the spark appears in red and cannot be imported
    }

Solution: give sparksession. Builder a corresponding variable value, which is spark

The spark here is not something under a package, but the variable value corresponding to our sparksession. Builder(). Here is the correct way to write it

 def main(args: Array[String]): Unit = {
        //Create SparkConf() And Set AppName
     val spark=  SparkSession.builder()
                .appName("Spark Sql basic example")
                .config("spark.some.config.option", "some-value")
                .getOrCreate()
 
        //import implicit DF,DS
        import spark.implicits._
    }