目前我正在尝试使用依赖注入(inject)容器，这次是使用Unity。给定以下界面:publicinterfaceIPodcastCommService{voidDownload();voidUpload();}和以下实现:publicclassPodcastService{privateIPodcastCommServicecommservice;privateStringurl;publicPodcastService(Stringurl,IPodcastCommServicecommservice){this.commservice=commservice;this.url=ur