scala.MatchError:org\apache\commons\io\IOCase.class（属于java.lang.String类）在sbt+；装配

当我使用sbt程序集时，它会打印如下错误：

[error] (*:assembly) scala.MatchError: org\apache\commons\io\IOCase.class (of class java.lang.String)

以下是我的配置：

1、 汇编.sbt:

import AssemblyKeys._
assemblySettings
mergeStrategy in assembly := {
    case PathList("org", "springframework", xs@_*) => MergeStrategy.last
}

sbt:0.13.5
assembly:0.11.2
java:1.7
scala:2.11.8

2、 bulid.sbt

import AssemblyKeys._
lazy val root = (project in file(".")).
  settings(
    name := "DmpRealtimeFlow",
    version := "1.0",
    scalaVersion := "2.11.8",
    libraryDependencies += "com.jd.ads.index" % "ad_index_dmp_common" % "0.0.4-SNAPSHOT",
    libraryDependencies += "org.apache.spark" % "spark-core_2.11" % "2.1.0" % "provided",
    libraryDependencies += "org.apache.spark" % "spark-sql_2.11" % "2.1.0" % "provided",
    libraryDependencies += "org.apache.spark" % "spark-streaming_2.11" % "2.1.0" % "provided",
    libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.8",
    libraryDependencies += "org.springframework" % "spring-beans" % "3.1.0.RELEASE",
    libraryDependencies += "org.springframework" % "spring-context" % "3.1.0.RELEASE",
    libraryDependencies += "org.springframework" % "spring-core" % "3.1.0.RELEASE",
    libraryDependencies += "org.springframework" % "spring-orm" % "3.1.0.RELEASE",
    libraryDependencies += "org.mybatis" % "mybatis" % "3.2.1" % "compile",
    libraryDependencies += "org.mybatis" % "mybatis-spring" % "1.2.2",
    libraryDependencies += "c3p0" % "c3p0" % "0.9.1.2"
  )

3、 项目工具：

import AssemblyKeys._
assemblySettings
mergeStrategy in assembly := {
    case PathList("org", "springframework", xs@_*) => MergeStrategy.last
}

sbt:0.13.5
assembly:0.11.2
java:1.7
scala:2.11.8

---

有什么帮助吗？

问题可能在于汇编块中的mergeStrategy中缺少默认情况：

    case x =>
      val oldStrategy = (assemblyMergeStrategy in assembly).value
      oldStrategy(x)

此外，mergeStrategy已被弃用，应改用assemblyMergeStrategy

基本上

{
    case PathList("org", "springframework", xs@_*) => MergeStrategy.last
}

---

是仅为一种类型的输入定义的部分函数字符串=>MergeStrategy，即对于包前缀为“org\springframework”的类。但是，它应用于项目中的所有类文件，第一个与上述前缀不匹配的类文件（org\apache\commons\io\IOCase.class）会导致MatchError。

问题可能在于汇编块中的mergeStrategy中缺少默认大小写：

    case x =>
      val oldStrategy = (assemblyMergeStrategy in assembly).value
      oldStrategy(x)

此外，mergeStrategy已被弃用，应改用assemblyMergeStrategy

基本上

{
    case PathList("org", "springframework", xs@_*) => MergeStrategy.last
}

是仅为一种类型的输入定义的部分函数字符串=>MergeStrategy，即对于包前缀为“org\springframework”的类。但是，它应用于项目中的所有类文件，第一个与上面的前缀（org\apache\commons\io\IOCase.class）不匹配的类文件会导致MatchError