自定义函数utf函数(1对1函数)

package SparkSQL.fun.registerfum
 
import org.apache.spark.SparkConf
import org.apache.spark.sql.{Dataset, SparkSession}
 
import scala.beans.BeanProperty
 
case class student(@BeanProperty var name: String, @BeanProperty var clz: String, @BeanProperty var age: Int, @BeanProperty var sex: String)
object registerfun1 {
  def main(args: Array[String]): Unit = {
    val conf = new SparkConf().setAppName("func1").setMaster("local[*]")
    val session = SparkSession.builder().config(conf).getOrCreate()
 
    import session.implicits._
    val dataset: Dataset[student] = session.createDataset(Array(
      student("zs", "c001", 21, "男"),
      student("ls", "c001", 22, "女"),
      student("ww", "c001", 23, "男"),
      student("ml", "c002", 20, "女"),
      student("zb", "c002", 23, "男")
    ))
 
    // 将每个age字段 +1
    session.udf.register("age_auto", (age: Int, num: Int) => {
      age + num
    })
 
    dataset.createTempView("student")
    val frame = session.sql("select name, age_auto(age, 5), sex, clz from student")
    frame.show()
 
    session.stop()
  }
}