Scala 2.11.4,akka 2.3.7,喷涂1.3.1给出类型不匹配错误

时间:2014-12-05 06:23:11

标签: scala akka spray

我是Scala的新手。在尝试用akka喷涂时,我收到以下错误

Error:(17, 17) type mismatch;
 found   : String("Welcome to Scala")
 required: spray.httpx.marshalling.ToResponseMarshallable
       complete("Welcome to Scala")

代码:

import spray.routing._
import akka.actor._
object SampleApplication extends App with SimpleRoutingApp {
  implicit val actorSystem = ActorSystem()
  startServer(interface = "localhost", port = 8080) {
    get {
      path("hello") {
        complete {
          "Welcome to Scala"
        }
      }
    }
  }
}

Maven依赖:

  <dependencies>
<dependency>
  <groupId>org.scala-lang</groupId>
  <artifactId>scala-library</artifactId>
  <version>${scala.version}</version>
</dependency>
<dependency>
  <groupId>org.specs</groupId>
  <artifactId>specs</artifactId>
  <version>1.2.5</version>
  <scope>test</scope>
</dependency>
<dependency>
  <groupId>io.spray</groupId>
  <artifactId>spray-routing</artifactId>
  <version>${spray.version}</version>
</dependency>
<dependency>
  <groupId>io.spray</groupId>
  <artifactId>spray-can</artifactId>
  <version>${spray.version}</version>
</dependency>
<dependency>
  <groupId>io.spray</groupId>
  <artifactId>spray-httpx</artifactId>
  <version>${spray.version}</version>
</dependency>
<dependency>
  <groupId>io.spray</groupId>
  <artifactId>spray-client</artifactId>
  <version>${spray.version}</version>
</dependency>
<dependency>
  <groupId>io.spray</groupId>
  <artifactId>spray-json_2.11</artifactId>
  <version>${spray.version}</version>
</dependency>
<dependency>
  <groupId>com.typesafe.akka</groupId>
  <artifactId>akka-actor_2.11</artifactId>
  <version>${akka.version}</version>
</dependency>
  </dependencies>

Ide使用的是intellij Idea 14

依赖关系是否严格绑定到scala版本?

请帮助解决问题。

1 个答案:

答案 0 :(得分:0)

你的例子适合我。我怀疑你的依赖项有些问题导致spray.httpx.marshalling无法找到。

总的来说,我强烈建议不要将Scven与Scala一起使用,而是坚持使用SBT。使用SBT,您可以访问相同的依赖项(就像在Maven中一样),但也可以直接从GitHub指定依赖项。您还将获得增量编译。能够在sbt中启动shell或servlet容器也很方便。如果使用Intellij IDEA,它可以将SBT配置作为项目打开。它带有您可能需要的make任务(测试,运行,doc,发布本地,控制台)。