Marshal.load上的ClassNotFoundException

时间:2011-04-24 01:36:54

标签: serialization scala marshalling unmarshalling classnotfoundexception

我正在尝试执行marshal转储并在Scala中加载...

import scala.util.Marshal

case class Test(test: String)

val t = Test("hello")
val bytes = Marshal.dump(t)
Marshal.load[Test](bytes)

...但是对Marshal.load的调用抛出了ClassNotFoundException ...

java.lang.ClassNotFoundException: Test
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:603)
at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1574)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1495)
at java.io.ObjectInputStream.readClass(ObjectInputStream.java:1461)
at java.io.Ob...

我也尝试过使用完全限定的类名,但没有运气。我错过了什么?

1 个答案:

答案 0 :(得分:3)

您使用的是哪个版本的SBT?我在SBT 0.7.7中遇到了类似的问题,并通过在我的构建中添加以下内容来解决它们:

// cause the SBT "run" action to fork                                                                                                              
override def fork = Some(new ForkScalaRun() {
  override def scalaJars = Seq(buildLibraryJar.asFile, buildCompilerJar.asFile)
})

将“run”操作导致fork似乎解决了类加载器问题,以及捕获System.exit调用的问题:

http://code.google.com/p/simple-build-tool/wiki/Forking

http://code.google.com/p/simple-build-tool/wiki/RunningProjectCode