Question

当我使用sbt程序集时，它会输出如下错误：

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

这些是我的配置：

1，的 assembly.sbt：

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

2，的 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：

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

任何帮助？

Answer 1

问题可能出在程序集块中mergeStrategy中缺少的默认情况：

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

此外，不推荐使用mergeStrategy，而应使用assemblyMergeStrategy。

基本上是

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

是部分函数String =＆gt; MergeStrategy仅针对一种类型的输入定义，即对于包前缀为“org \ springframework”的类。但是，它适用于项目中的所有类文件，并且第一个与上面的前缀不匹配的文件（org \ apache \ commons \ io \ IOCase.class）会导致MatchError。

sbt + assembly中的scala.MatchError：org \ apache \ commons \ io \ IOCase.class（类java.lang.String）

1 个答案: