当我进入目录“/ samples / scala / helloworld”时,我执行“sbt”并获得：

[info] Loading project definition from C:\src\Play20\samples\scala\helloworld\project
[warn]  module not found: play#sbt-plugin;2.0
[warn] ==== typesafe-ivy-releases: tried
[warn]   http://repo.typesafe.com/typesafe/ivy-releases/play/sbt-plugin/scala_2.9.2/sbt_0.12/2.0/ivys/ivy.xml
[warn] ==== sbt-plugin-releases: tried
[warn]   http://scalasbt.artifactoryonline.com/scalasbt/sbt-plugin-releases/play/sbt-plugin/scala_2.9.2/sbt_0.12/2.0/ivys/ivy.xml
[warn] ==== local: tried
[warn]   C:\Users\labra\.ivy2\local\play\sbt-plugin\scala_2.9.2\sbt_0.12\2.0\ivys\ivy.xml
[warn] ==== Typesafe repository: tried
[warn]   http://repo.typesafe.com/typesafe/releases/play/sbt-plugin_2.9.2_0.12/2.0/sbt-plugin-2.0.pom
[warn] ==== public: tried
[warn]   http://repo1.maven.org/maven2/play/sbt-plugin_2.9.2_0.12/2.0/sbt-plugin-2.0.pom
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: play#sbt-plugin;2.0: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn] 
[warn]  Note: Some unresolved dependencies have extra attributes.  Check that these dependencies exist with the requested attributes.
[warn]      play:sbt-plugin:2.0 (sbtVersion=0.12,scalaVersion=2.9.2)
[warn] 
sbt.ResolveException: unresolved dependency: play#sbt-plugin;2.0: not found
    at sbt.IvyActions$.sbt$IvyActions$$resolve(IvyActions.scala:214)
. . .

    at java.lang.Thread.run(Thread.java:722)
[error] (*:update) sbt.ResolveException: unresolved dependency: play#sbt-plugin;2.0: not found
Project loading Failed: (r)etry,(q)uit,(l)ast,or (i)gnore? 
[info] Loading project definition from C:\src\Play20\samples\scala\helloworld\project
[warn]  module not found: play#sbt-plugin;2.0
[warn] ==== typesafe-ivy-releases: tried
[warn]   http://repo.typesafe.com/typesafe/ivy-releases/play/sbt-plugin/scala_2.9.2/sbt_0.12/2.0/ivys/ivy.xml
[warn] ==== sbt-plugin-releases: tried
[warn]   http://scalasbt.artifactoryonline.com/scalasbt/sbt-plugin-releases/play/sbt-plugin/scala_2.9.2/sbt_0.12/2.0/ivys/ivy.xml
[warn] ==== local: tried
[warn]   C:\Users\labra\.ivy2\local\play\sbt-plugin\scala_2.9.2\sbt_0.12\2.0\ivys\ivy.xml
[warn] ==== Typesafe repository: tried
[warn]   http://repo.typesafe.com/typesafe/releases/play/sbt-plugin_2.9.2_0.12/2.0/sbt-plugin-2.0.pom
[warn] ==== public: tried
[warn]   http://repo1.maven.org/maven2/play/sbt-plugin_2.9.2_0.12/2.0/sbt-plugin-2.0.pom
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: play#sbt-plugin;2.0: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn] 
[warn]  Note: Some unresolved dependencies have extra attributes.  Check that these dependencies exist with the requested attributes.
[warn]      play:sbt-plugin:2.0 (sbtVersion=0.12,scalaVersion=2.9.2)
[warn] 
sbt.ResolveException: unresolved dependency: play#sbt-plugin;2.0: not found
    at sbt.IvyActions$.sbt$IvyActions$$resolve(IvyActions.scala:214)
    at sbt.IvyActions$$anonfun$update$1.apply(IvyActions.scala:122)
. . .
    at java.lang.Thread.run(Thread.java:722)
[error] (*:update) sbt.ResolveException: unresolved dependency: play#sbt-plugin;2.0: not found
Project loading Failed: (r)etry,or (i)gnore? q

我从http://www.scala-sbt.org/release/docs/Getting-Started/Setup安装了sbt版本12.1

我在这里注意到一个类似的问题：https://groups.google.com/forum/?fromgroups=#!topic/simple-build-tool/DGUbWsgZiLw

在答案中,它似乎与SBT的“启动器”版本有关,我怎么知道这是我的启动器sbt版本？我该如何更新它？

我也尝试从源代码编译xsbt但是,当运行“sbt build-all”时,我得到：

. . .
[info] Reading library jar [C:\compi\jdk\jre\lib\rt.jar]
[error] Error: Can't read [proguard.ClassPathEntry@73abdb5e] (Can't process class [com/oracle/net/Sdp$1.class] (Unsupported version number [51.0] for class format))
[error] java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: GC overhead limit exceeded
[error] Use 'last' for the full log.

但是,我的问题不是编译xsbt,而是知道如何执行“Play的例子”

在新文件夹中运行“sbt sbt-version”时,我获得：

[info] Set current project to default-85f41b (...)
[info] 0.12.1