【发布时间】：2017-03-22 14:54:21
【问题描述】：
我一直在关注this tutorial 以了解如何将 Akka HTTP 与 Scala 一起使用。我之前没有使用 Scala 的经验。我正在使用 IntelliJ Idea 2016.3 Ultimate。
我创建了一个项目并配置了as the guide says。
name := "My Project"
version := "1.0"
scalaVersion := "2.9.1"
resolvers += "Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/"
libraryDependencies += "com.typesafe.akka" % "akka-actor" % "2.0"
我有完全相同的代码as in the guide，但是当我运行 SBT 命令编译时出现以下错误
[info] Updating {file:/Users/Javyer/Testing/Akka-Test/}akka-test...
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[info] Done updating.
[info] Compiling 1 Scala source to /Users/Javyer/Testing/Akka-Test/target/scala-2.9.1/classes...
[info] 'compiler-interface' not yet compiled for Scala 2.9.1.final. Compiling...
error: error while loading CharSequence, class file '/Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/jre/lib/rt.jar(java/lang/CharSequence.class)' is broken
(bad constant pool tag 18 at byte 10)
error: error while loading AnnotatedElement, class file '/Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/jre/lib/rt.jar(java/lang/reflect/AnnotatedElement.class)' is broken
(bad constant pool tag 18 at byte 76)
error: error while loading Arrays, class file '/Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/jre/lib/rt.jar(java/util/Arrays.class)' is broken
(bad constant pool tag 18 at byte 765)
error: error while loading Comparator, class file '/Library/Java/JavaVirtualMachines/jdk1.8.0_121.jdk/Contents/Home/jre/lib/rt.jar(java/util/Comparator.class)' is broken
(bad constant pool tag 18 at byte 20)
/var/folders/kw/80c0kgzs0b9d06vjrbx0l6g40000gn/T/sbt_139df807/xsbt/ExtractAPI.scala:549: error: java.util.Comparator does not take type parameters
private[this] val sortClasses = new Comparator[Symbol] {
^
5 errors found
[info] Resolving org.scala-sbt#interface;0.13.13 ...
[error] (compile:compileIncremental) Error compiling sbt component 'compiler-interface'
[error] Total time: 5 s, completed Mar 22, 2017 11:42:21 AM
如果我将 build.sbt 更改为 akka 库的更新版本
name := "Akka-Test"
version := "1.0"
scalaVersion := "2.12.1"
resolvers += "Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/"
libraryDependencies ++= Seq(
"com.typesafe.akka" %% "akka-actor" % "2.4.17",
"com.typesafe.akka" %% "akka-remote" % "2.4.17"
)
再次编译我得到一个不同的错误
[info] Updating {file:/Users/Javyer/Testing/Akka-Test/}akka-test...
[info] Resolving jline#jline;2.14.1 ...
[info] Done updating.
[info] Compiling 1 Scala source to /Users/Javyer/Testing/Akka-Test/target/scala-2.12/classes...
[error] /Users/Javyer/Testing/Akka-Test/src/main/scala/Pi.scala:5: object RoundRobinRouter is not a member of package akka.routing
[error] import akka.routing.RoundRobinRouter
[error] ^
[error] /Users/Javyer/Testing/Akka-Test/src/main/scala/Pi.scala:6: object Duration is not a member of package akka.util
[error] import akka.util.Duration
[error] ^
[error] /Users/Javyer/Testing/Akka-Test/src/main/scala/Pi.scala:7: object duration is not a member of package akka.util
[error] import akka.util.duration._
[error] ^
[error] /Users/Javyer/Testing/Akka-Test/src/main/scala/Pi.scala:17: not found: type Duration
[error] case class PiApproximation(pi: Double, duration: Duration)
[error] ^
[error] /Users/Javyer/Testing/Akka-Test/src/main/scala/Pi.scala:40: not found: value RoundRobinRouter
[error] val workerRouter = context.actorOf(Props[Worker].withRouter(RoundRobinRouter(nrOfWorkers)), name = "workerRouter")
[error] ^
[error] 5 errors found
[error] (compile:compileIncremental) Compilation failed
[error] Total time: 4 s, completed Mar 22, 2017 11:47:47 AM
我该如何解决这个问题？我不知道如何调试这个错误，也不知道从哪里开始解决这个问题。正如我所说，这是我对 Scala 的第一次测试，所以我之前没有任何经验，所以请给我详细的答案。
谢谢！
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标签： scala intellij-idea sbt akka-http