Scala 喷雾相关性错误

我正在尝试运行Spray文档中的“最小示例”：

我使用的是scala 2.10.3，这是我在Dependencies.scala文件中描述的配置的一部分：

val sprayVersion = "1.2-RC2"
val sprayCan     = "io.spray"           %    "spray-can"     % sprayVersion
val sprayRouting = "io.spray"           %    "spray-routing" % sprayVersion
val sprayJson    = "io.spray"           %%   "spray-json"    % "1.2.5"

val akkaVersion  = "2.2.3"
val akkaActor    = "com.typesafe.akka"  %%  "akka-actor"     % akkaVersion
val akkaSlf4j    = "com.typesafe.akka"  %%  "akka-slf4j"     % akkaVersion
val akkaTestKit  = "com.typesafe.akka"  %%  "akka-testkit"   % akkaVersion

这是我的简单代码，如示例所示：

import spray.routing.SimpleRoutingApp

    object Main extends App with SimpleRoutingApp {
      startServer(interface = "localhost", port = 8080) {
        path("hello") {
          get {
            complete {
              <h1>Say hello to spray</h1>
            }
          }
        }
      }
    }

我只是不知道我做错了什么

编辑： 我认为错误是由方法的返回startServer中使用的Http.Bound引起的：

IO(Http).ask(Http.Bind(serviceActor, interface, port, backlog, options, settings)).mapTo[Http.Bound]

特别是我认为它在Http.scala中导入akka.io.Tcp会给您带来问题。 在上一篇文章中，我读到akka 2.2.0将更多IO标记为“实验性”

---

我快疯了

尝试添加actor类/对象的显式导入，并声明隐式actor system val。如下所示：

import spray.routing.SimpleRoutingApp
import akka.actor._

object Main extends App with SimpleRoutingApp {
  implicit val system = ActorSystem("my-system")

  startServer(interface = "localhost", port = 8080) {
    path("hello") {
      get {
        complete {
          <h1>Say hello to spray</h1>
        }
      }
    }
  }
}

---

谢谢xflin，通过您的回答，我发现了问题：隐式val！

import spray.routing.SimpleRoutingApp
import akka.actor._

object Main extends App with SimpleRoutingApp {
  implicit val system = ActorSystem("my-system")

  startServer(interface = "localhost", port = 8080) {
    path("hello") {
      get {
        complete {
          <h1>Say hello to spray</h1>
        }
      }
    }
  }
}

name := """spray-rest"""

version := "1.0"

scalaVersion := "2.10.3"

resolvers += "spray repo" at "http://repo.spray.io"

resolvers += "spray nightlies" at "http://nightlies.spray.io"

libraryDependencies ++= Seq(
  "com.typesafe.akka"  %% "akka-actor"       % "2.2.3",
  "com.typesafe.akka"  %% "akka-slf4j"       % "2.2.3",
  "ch.qos.logback"      % "logback-classic"  % "1.0.13",
  "io.spray"            % "spray-can"        % "1.2-RC2",
  "io.spray"            % "spray-routing"    % "1.2-RC2",
  "io.spray"           %% "spray-json"       % "1.2.3",
  "org.specs2"         %% "specs2"           % "1.14"         % "test",
  "io.spray"            % "spray-testkit"    % "1.2-RC2" % "test",
  "com.typesafe.akka"  %% "akka-testkit"     % "2.2.3"        % "test",
  "com.novocode"        % "junit-interface"  % "0.7"          % "test->default"
)

scalacOptions ++= Seq(
  "-unchecked",
  "-deprecation",
  "-Xlint",
  "-Ywarn-dead-code",
  "-language:_",
  "-target:jvm-1.7",
  "-encoding", "UTF-8"
)

testOptions += Tests.Argument(TestFrameworks.JUnit, "-v")