Intellij idea 异常原因：java.lang.ClassNotFoundException:org.reactivestreams.Publisher

在我使用IntelliJ IDEA 2017.1.2（Build#IC-171.4249.39）中的RxJava和Kotlin开发的基于JavaFX Gradle的应用程序中，我遇到了一个例外：

线程“JavaFX应用程序线程”java.lang.NoClassDefFoundError中出现异常：org/reactivestreams/Publisher

每次都是这样的代码

return Completable.complete()

被执行。根据一个类似问题的建议，我尝试将include反应流添加到我的

build.gradle

脚本的

dependencies

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'
}

但问题依然存在。依赖关系树如下所示：

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，org.reactivestreams:reactivestreams存在于每个环境中

现在，我已经通过手动添加对的依赖关系解决了这个问题，但我根本不喜欢这个解决方案

---

谁能给我一个更好的建议？谢谢

为什么要使用rxjava2 kotlin和org.reactivestreams:reactivestreams:1.0.0？io.reactivex.rxjava2:rxjava:2.x.y。。。我认为如果需要使用org.reactivestreams:reactivestreams:1.0.0或传递到v2版本，就必须使用io.reactivex:rxkotlin:1.x.y。