编辑：如果你真的想处理这个项目，导入一个sbt项目并选择core作为根就足够了。intellij还应该检测 build.sbt 如果你打开核心作为根。
这是sbt参考手册
传统上， build.sbt 将是项目的根本。
如果您希望使用它们的库，则应将它们导入sbt文件中，除非您打算修改或派生它们的repo，否则不应克隆repo。
要将库导入到项目中，请查看maven repository for cloudflow，选择项目，单击所需版本，然后选择sbt选项卡。只需将这些依赖项复制并粘贴到 build.sbt . 一旦您用sbt构建了项目，您就应该拥有所有这些包。
所以在 [ProjectRoot]/build.sbt 类似于

val scalaVersion = "2.13.4"

lazy val root = (project in file("."))
  .settings(
    name := "Your_Project_Name",
    scalaVersion := scalaVersion,
    libraryDependencies += "com.lightbend.cloudflow" %% "cloudflow-streamlets" % "2.0.26-RC12",
        // Either sequentially
    libraryDependencies += "com.lightbend.cloudflow" %% "cloudflow-akka" % "2.0.26-RC12",
        // Or as a sequence (note that you can have a trailing comma for these)
    libraryDependencies ++= Seq(
        "com.lightbend.cloudflow" %% "cloudflow-blueprint" % "2.0.26-RC12",
        "com.lightbend.cloudflow" %% "cloudflow-flink" % "2.0.26-RC12", // No next elemenet
    )
        // Or combo using both like above, just don't forget the commas in between
  )