scala 使用case 关键字定义类不需要创建对象直接调用

package config
import org.apache.spark.sql.SparkSession
import org.apache.spark.{SparkConf, SparkContext}
case object conf {
   val confs: SparkConf = new SparkConf().setMaster("local").setAppName("job")
   val sc = new SparkContext(confs)
   val spark: SparkSession = SparkSession.builder()
    .appName("jobs").config(confs).getOrCreate()
}