import org.json4s.native.Serialization.{read, write}
object Json2CaseClass extends App {
  implicit val formats = org.json4s.DefaultFormats
  case class Class(_name:String, students: List[Student])
  case class Student(sid:String, _name:String)
  val s = "{\"_name\":\"Class1\",\"students\":[{\"sid\":\"1\",\"_name\":\"小明\"},{\"sid\":\"1\",\"_name\":\"小王\"}]}"
  val clazz:Class = read[Class](s)
  println(clazz)
  println(write(clazz))
}

<dependency>
    <groupId>org.json4s</groupId>
    <artifactId>json4s-native_2.10</artifactId>
    <version>3.2.11</version>
    <scope>${pkg}</scope>
</dependency>

代码工程：https://github.com/chocolateBlack/LearningSpark/commit/3c56dd2c89c83b99fb9b3de6d563065279ca2a0e