其他 - 在scala / play中解析“字符串化” JSON

case class Response(name: String, scores: Seq[Seq[Int]], data: Map[String, String])

import play.api.libs.json._

val stringified = Reads[JsValue] {
  _.validate[String].flatMap { raw =>
    try {
      JsSuccess(Json.parse(raw))
    } catch {
      case cause =>
        JsError(cause.getMessage)
    }
  }
}

implicit val respReads = Reads[Response] { js =>
  for {
    name <- (js \ "name").validate[String]
    scores <- (js \ "scores").validate(
      stringified).flatMap(_.validate[Seq[Seq[Int]]])
    data <- (js \ "data").validate(
      stringified).flatMap(_.validate[Map[String, String]])
  } yield Response(name, scores, data)
}

Json.parse("""{
  "name":"some_name",
  "scores": "[[10,15]]",
  "data": "{\"attr1\":\"value1\",\"attr2\":\"value3\"}"
}""").validate[Response]
// JsSuccess(Response(some_name,Vector(Vector(10, 15)),Map(attr1 -> value1, attr2 -> value3)),)