Akka Http -将DateTime解析为json时“类型不匹配”

import akka.http.scaladsl.marshallers.sprayjson.SprayJsonSupport
import spray.json._

// 定义一个case class，包含DateTime字段
case class MyData(time: DateTime)

// 定义一个JsonFormat，将DateTime转换为字符串
object MyJsonProtocol extends DefaultJsonProtocol with SprayJsonSupport {
  implicit object DateTimeFormat extends JsonFormat[DateTime] {
    def write(dateTime: DateTime) = JsString(dateTime.toString)
    def read(json: JsValue) = json match {
      case JsString(dateTimeStr) => DateTime.parse(dateTimeStr)
      case _ => throw new DeserializationException("DateTime expected")
    }
  }

  implicit val myDataFormat = jsonFormat1(MyData)
}

// 在路由中使用JsonFormat
import akka.http.scaladsl.server.Directives._
import MyJsonProtocol._

val route = path("data") {
  get {
    complete(MyData(DateTime.now()))
  }
}

// 启动Akka Http服务器
val bindingFuture = Http().bindAndHandle(route, "localhost", 8080)