记事本内容: 打印结构: 方法1: object SparkSessionTest { case class Person(name:String,age:Int) def main(args: Array[String]): Unit = { val sparkSession=SparkSession.builder().appName("SparkSessionTest") .master("local[*]") .getOrCreate() val spark…

Dataset创建 object DatasetCreation { def main(args: Array[String]): Unit = { val spark = SparkSession .builder() .appName("SparkSessionTest") .getOrCreate() import spark.implicits._ //1: range val ds1 = spark.range(0, 10, 2, 2) ds1.show() val dogs…