java - Cannot run wordcount example in flink

Question

After import pom of flink-release-1.4.2, I try to run wordcount example.But I cannot build it becauseof lots of errors about Scala.

 Information:19-2-20 上午2:45 - Compilation completed with 53 errors and 0 warnings in 2s 439ms
/media/maple/新加卷/download/Notes/flink-release-1.4.2/flink-examples/flink-examples-batch/src/main/scala/org/apache/flink/examples/scala/clustering/KMeans.scala
Error:(81, 14) not found: type ExecutionEnvironment
    val env: ExecutionEnvironment = ExecutionEnvironment.getExecutionEnvironment
Error:(81, 37) not found: value ExecutionEnvironment
    val env: ExecutionEnvironment = ExecutionEnvironment.getExecutionEnvironment
Error:(85, 17) not found: type DataSet
    val points: DataSet[Point] = getPointDataSet(params, env)
Error:(131, 74) not found: type DataSet
  def getPointDataSet(params: ParameterTool, env: ExecutionEnvironment): DataSet[Point] = {
Error:(131, 51) not found: type ExecutionEnvironment
  def getPointDataSet(params: ParameterTool, env: ExecutionEnvironment): DataSet[Point] = {
Error:(86, 20) not found: type DataSet
    val centroids: DataSet[Centroid] = getCentroidDataSet(params, env)

So what's wrong. And when I only import pom of flink-examples, the wordcount program could run normally. For example:

I have tried reimport Maven, invalidate caches, and install Scala plugins.

标签： javascalamavenintellij-ideaapache-flink

Answer 1

使用 IntelliJ，您需要 JetBrains Scala 插件，并且您需要打开项目结构对话框并在 Global Libraries 部分添加一个 Scala SDK。