spring集成入站网关http请求标头。

I have files stored in MongoDB which can be uploaded/downloaded/deleted via a Rest service. I'd like to download files from MongoDB via Spring Integration (+Boot+Embedded Jetty) but I can't figure out how to set the Content-Disposition header properly because the downloaded file has the correct payload but the filename is wrong (it's receiveGateway without any extension):I have files stored in MongoDB which can be upl