将RDD [String]类型文本拆分为RDD [String]类型的单词（Scala，Apache Spark）

I'm working with Apache Spark and Scala and have a text RDD[String] of the lines in the text. I'd like to split it into words (as in split it at every space) and get out another RDD[String] consisting of the separate words.I'm working with Apache Spark and Scala and hav