将源[ByteString，NotUsed]值打印到控制台

import akka.actor.ActorSystem
import akka.stream.ActorMaterializer
import akka.stream.scaladsl.Source
import akka.util.ByteString

object PrintToConsoleExample extends App {
  implicit val system = ActorSystem("PrintToConsoleExample")
  implicit val materializer = ActorMaterializer()

  // 创建一个数据源，包含多个字节字符串
  val source: Source[ByteString, NotUsed] = Source(List(
    ByteString("Hello"),
    ByteString("World"),
    ByteString("!"),
  ))

  // 将数据源的值打印到控制台
  source.runForeach { byteString =>
    println(byteString.utf8String)
  }(materializer)
}