def main(args: Array[String]): Unit = {

     def regJson(json:Option[Any]) = json match {

       case Some(map: Map[String, Any]) => map

 //      case None => "erro"

 //      case other => "Unknow data structure : " + other

     }

     val str = "{\"host\":\"td_test\",\"ts\":1486979192345,\"device\":{\"tid\":\"a123456\",\"os\":\"android\",\"sdk\":\"1.0.3\"},\"time\":1501469230058}"

     val jsonS = JSON.parseFull(str)

     val first = regJson(jsonS)

     // 获取一级key

     println(first.get("host"))

     // 获取二级key

     val dev = first.get("device")

     println(dev)

     val sec = regJson(dev)

     println(sec.get("tid").toString.replace("Some(","").replace(")",""))

   }

 def main(args: Array[String]): Unit = {

     gson("{\"host\":\"td_test\",\"ts\":1486979192345,\"device\":{\"tid\":\"a123456\",\"os\":\"android\",\"sdk\":\"1.0.3\"},\"time\":1501469230058}")

   }

   def gson(str: String) ={

     val json = new JsonParser()

     val obj = json.parse(str).asInstanceOf[JsonObject]

     println(obj.get("device"))

     println(obj.get("ts"))

   }