IntelliJ Scala项目导入

Question

I have a scala project in IntelliJ with a simple folder structure src/core/CommonCSVReader.scala I have a program.scala file under src/ i run spark-shell from the integrated terminal, and try to run :load program.scala i get the following error:

object CommonCSVReader is not a member of package core

even is i exit spark-shell and try to run scala program.scala i get the same problem, I wanted to try running the program.scala from intelliJ but if I right click on program.scala I don't have the Run ScalaApp option, only Run Scala console which just starts a Scala console, I can't find what I'm missing here, thank you,

program.scala

import core.CommonCSVReader

object program {
 def main():Unit = {
 val path:String = "some/path"

val reader = new CommonCSVReader(path)
reader.Read()
}
}

EDIT: please find CommonCSVReader Class below:

package core

import org.apache.spark.sql.SparkSession

class CommonCSVReader(filename:String) extends ParserFileReader(filename) {
val spark = SparkSession.builder().config("spark.master", 
"local").getOrCreate()
 def Read():Unit = {
val df = spark.read.option("header", "true").option("inferSchema", 
"true").csv(filename)

   //Show Schema
    df.printSchema()
  }
 }

Answer 1

You need to add

package core

to the beginning of CommonCSVReader.scala . Just putting it inside the folder isn't enough.

Edit:

I also just noticed, that you didn't put your packages inside a scala folder. The "usual" path is:

src/main/scala/<packages>

Though I am not sure if this has an affect or not

Answer 2

program.scala

import core.CommonCSVReader

object program extends App {
val path:String = "some/path"

val reader = new CommonCSVReader(path)
reader.Read()
}

it seems I have to extends App, now when I right click on program.scala I have the option run 'program' and it works fine, but not from the terminal