Scala Play DI问题:无法注入类或对象的字段

Application
|
|--> /ApplicationA
|   -> /app
|     ->Filters.scala
|     ->AuthenticationComponent.scala
|   -> /build.sbt
| 
|--> /ApplicationB
|   -> /app
|     ->Module.scala
|     ->VanillaAuthenticationUtil.scala
|   -> /build.sbt
|
|-> /conf
|-> /build.sbt

代码 单元斯卡拉

class Module extends AbstractModule  {
  override def configure(): Unit = {
    bind(classOf[AuthenticationUtil])
      .annotatedWith(Names.named("authUtil"))
      .to(classOf[VanillaAuthenticationUtil]).asEagerSingleton()
  }
}

应用程序A 应用程序B 和 取决于 应用程序A .

过滤器。斯卡拉 AuthenticationComponent。斯卡拉 还列出了:

class Filters @Inject()(corsFilter: CORSFilter) extends HttpFilters {
  @Inject
  @Named("authUtil")
  var authUtil:AuthenticationUtil = _
  def filters = Seq(corsFilter, authUtil)
}

class AuthenticationComponent   {
  @Inject
  @Named("authUtil")
  var authUtil:AuthenticationUtil = _
  def getAuthUtil():AuthenticationFilter ={

  println(authUtil == null)
  authUtil
  }
}

所以,当我打电话的时候 从…起 它表示authUtil等于null,但在