spark value $ is not a member of StringContext

问题描述：

Error:(61, 40) value $ is not a member of StringContext
    val click= df.filter($"e_type" === "click")
    

在创建的SparkSession对象后，引入【implicits._】

val spark = SparkSession.builder()
      .master("local[*]")
      .appName(s"${this.getClass.getName}")
      .getOrCreate()

val df = spark.read.json(inputPath)
    import spark.implicits._
    val click: Dataset[Row] = df.filter($"e_type" === "click")

问题解决，开发继续向下进行