sparksession.read的问题，求解
val lines = spark.read.text("H:/data/wordcount").as[String]发生报错Error:(16, 56) Unable to find encoder for type stored in a Dataset.Primitive types (Int, String, etc) and Product types (case classes) are supported by importing spark.implicits._Support for serializing other types will be added in future releases. val lines = spark.read.text("H:/data/wordcount").asError:(16, 56) not enough arguments for method as: (implicit evidence$2: org.apache.spark.sql.Encoder)org.apache.spark.sql.Dataset.Unspecified value parameter evidence$2. val lines = spark.read.text("H:/data/wordcount").as
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