import cn.doitedu.commons.util.SparkUtil
import org.apache.spark.ml.linalg
import org.apache.spark.ml.linalg.{Vector, Vectors}
import org.apache.spark.sql.{DataFrame, Dataset, SparkSession}
object KnnDemo {
def main(args: Array[String]): Unit = {
val spark: SparkSession = SparkUtil.getSparkSes
