在Scala SBT中解决进口冲突

Question

我正在尝试遵循本教程，但是两天内我会遇到相同的错误。我在这里发现了一些类似的问题，但是其中任何一个都帮助了我（也许是因为我对Scala和SBT缺乏知识）。

这是我的build.sbt

name := "fitman"
version := "1.0"
scalaVersion := "2.11.6"
lazy val versions = new {
  val finatra = "2.1.2"
  val logback = "1.1.3"
}
resolvers ++= Seq(
  Resolver.sonatypeRepo("releases"),
  "Twitter Maven" at "https://maven.twttr.com"
)
libraryDependencies += "com.twitter.finatra" %% "finatra-http" % versions.finatra
libraryDependencies += "com.twitter.finatra" %% "finatra-slf4j" % versions.finatra
libraryDependencies += "ch.qos.logback" % "logback-classic" % versions.logback

这是我要理解的警告：

SBT project import
                [warn] Scala version was updated by one of library dependencies:
                [warn]  * org.scala-lang:scala-library:(2.11.6, 2.11.4, 2.11.0, 2.11.2) -> 2.11.7
                [warn] To force scalaVersion, add the following:
                [warn]  ivyScala := ivyScala.value map { _.copy(overrideScalaVersion = true) }
                [warn] Run 'evicted' to see detailed eviction warnings
                [warn] Multiple dependencies with the same organization/name but different versions. To avoid conflict, pick one version:
                [warn]  * org.scala-lang:scala-library:(2.11.7, 2.11.6)
                [warn]  * org.scala-lang:scala-reflect:(2.11.7, 2.11.6)
                [warn]  * org.scala-lang.modules:scala-parser-combinators_2.11:(1.0.4, 1.0.3)
                [warn]  * org.scala-lang.modules:scala-xml_2.11:(1.0.5, 1.0.3)

Answer 1

您使用的库之一需要Scala 2.11.7，因此SBT正在用它覆盖您的scalaVersion设置。在构建文件中更新Scala的版本：

scalaVersion := "2.11.7"