Scala和Akka HTTP:如何以字符串形式获取实体内容

import akka.actor.ActorSystem
import akka.http.scaladsl.Http
import akka.http.scaladsl.model._
import akka.stream.ActorMaterializer
import akka.stream.scaladsl._

import scala.concurrent.Future

object Main extends App {
  implicit val system = ActorSystem()
  implicit val materializer = ActorMaterializer()
  implicit val executionContext = system.dispatcher

  val requestUri = "https://example.com/api/entity" // 实体的URL

  val responseFuture: Future[HttpResponse] = Http().singleRequest(HttpRequest(uri = requestUri))

  responseFuture
    .flatMap(_.entity.toStrict(5000.millis)) // 获取实体内容
    .map(_.data.utf8String) // 将实体内容转换为字符串
    .foreach(println) // 打印实体内容

  // 关闭资源
  responseFuture.onComplete(_ => system.terminate())
}