Question

在我使用IntelliJ IDEA 2017.1.2（Build＃IC-171.4249.39）中使用RxJava和Kotlin开发的基于JavaFX Gradle的应用程序中，我得到了例外：

线程中的异常＆＃34; JavaFX应用程序线程＆＃34; java.lang.NoClassDefFoundError：org / reactivestreams / Publisher

每次都有这样的代码

return Completable.complete()

已执行。在提出类似问题Why I am getting NoClassDefFoundError: org/reactivestreams/Publisher的建议后，我尝试将反应流添加到dependencies脚本的build.gradle块中

dependencies {
    compile 'org.jetbrains.kotlin:kotlin-stdlib:1.1.2'
    compile 'org.reactivestreams:reactive-streams:1.0.0'
    compile 'io.reactivex.rxjava2:rxkotlin:2.0.0'
}

但问题仍然存在。依赖树看起来像这样：

compile - Dependencies for source set 'main' (deprecated, use 'implementation ' instead).
+--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
|    \--- org.jetbrains:annotations:13.0
+--- org.reactivestreams:reactive-streams:1.0.0
\--- io.reactivex.rxjava2:rxkotlin:2.0.0
     +--- io.reactivex.rxjava2:rxjava:2.0.7
     |    \--- org.reactivestreams:reactive-streams:1.0.0
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.0 -> 1.1.2 (*)

compileClasspath - Compile classpath for source set 'main'.
+--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
|    \--- org.jetbrains:annotations:13.0
+--- org.reactivestreams:reactive-streams:1.0.0
\--- io.reactivex.rxjava2:rxkotlin:2.0.0
     +--- io.reactivex.rxjava2:rxjava:2.0.7
     |    \--- org.reactivestreams:reactive-streams:1.0.0
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.0 -> 1.1.2 (*)

+--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
|    \--- org.jetbrains:annotations:13.0
+--- org.reactivestreams:reactive-streams:1.0.0
\--- io.reactivex.rxjava2:rxkotlin:2.0.0
     +--- io.reactivex.rxjava2:rxjava:2.0.7
     |    \--- org.reactivestreams:reactive-streams:1.0.0
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.0 -> 1.1.2 (*)

\--- org.jetbrains.kotlin:kotlin-annotation-processing:1.1.2
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
          \--- org.jetbrains:annotations:13.0

kaptTest
\--- org.jetbrains.kotlin:kotlin-annotation-processing:1.1.2
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
          \--- org.jetbrains:annotations:13.0

runtime - Runtime dependencies for source set 'main' (deprecated, use 'runtimeOnly ' instead).
+--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
|    \--- org.jetbrains:annotations:13.0
+--- org.reactivestreams:reactive-streams:1.0.0
\--- io.reactivex.rxjava2:rxkotlin:2.0.0
     +--- io.reactivex.rxjava2:rxjava:2.0.7
     |    \--- org.reactivestreams:reactive-streams:1.0.0
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.0 -> 1.1.2 (*)

runtimeClasspath - Runtime classpath of source set 'main'.
+--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
|    \--- org.jetbrains:annotations:13.0
+--- org.reactivestreams:reactive-streams:1.0.0
\--- io.reactivex.rxjava2:rxkotlin:2.0.0
     +--- io.reactivex.rxjava2:rxjava:2.0.7
     |    \--- org.reactivestreams:reactive-streams:1.0.0
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.0 -> 1.1.2 (*)

testCompile - Dependencies for source set 'test' (deprecated, use 'testImplementation ' instead).
+--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
|    \--- org.jetbrains:annotations:13.0
+--- org.reactivestreams:reactive-streams:1.0.0
\--- io.reactivex.rxjava2:rxkotlin:2.0.0
     +--- io.reactivex.rxjava2:rxjava:2.0.7
     |    \--- org.reactivestreams:reactive-streams:1.0.0
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.0 -> 1.1.2 (*)

testCompileClasspath - Compile classpath for source set 'test'.
+--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
|    \--- org.jetbrains:annotations:13.0
+--- org.reactivestreams:reactive-streams:1.0.0
\--- io.reactivex.rxjava2:rxkotlin:2.0.0
     +--- io.reactivex.rxjava2:rxjava:2.0.7
     |    \--- org.reactivestreams:reactive-streams:1.0.0
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.0 -> 1.1.2 (*)

testRuntime - Runtime dependencies for source set 'test' (deprecated, use 'testRuntimeOnly ' instead).
+--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
|    \--- org.jetbrains:annotations:13.0
+--- org.reactivestreams:reactive-streams:1.0.0
\--- io.reactivex.rxjava2:rxkotlin:2.0.0
     +--- io.reactivex.rxjava2:rxjava:2.0.7
     |    \--- org.reactivestreams:reactive-streams:1.0.0
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.0 -> 1.1.2 (*)

testRuntimeClasspath - Runtime classpath of source set 'test'.
+--- org.jetbrains.kotlin:kotlin-stdlib:1.1.2
|    \--- org.jetbrains:annotations:13.0
+--- org.reactivestreams:reactive-streams:1.0.0
\--- io.reactivex.rxjava2:rxkotlin:2.0.0
     +--- io.reactivex.rxjava2:rxjava:2.0.7
     |    \--- org.reactivestreams:reactive-streams:1.0.0
     \--- org.jetbrains.kotlin:kotlin-stdlib:1.1.0 -> 1.1.2 (*)

如您所见，每个环境中都存在 org.reactivestreams：reactive-streams 。

现在，我已设法通过添加reactive-streams-1.0.0.jar的手动依赖来解决问题，但我根本不喜欢这个解决方案。

有人可以建议更好的解决方案吗？谢谢！

由以下原因引起的异常：java.lang.ClassNotFoundException：org.reactivestreams.Publisher

0 个答案: