I'm trying to add an upload file button in Swagger-UI using annotations with swagger-jaxrs2

I finally found the solution after 3 weeks of swapping Annotation combinations.  

@Parameter(schema = @Schema(name = "file", type = "string", format = "binary"))

This is needed for the InputStream @FormDataParam annotation.

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
@Produces(MediaType.APPLICATION_JSON)
@Path("/upload")
@Operation(
    summary = "summary",
    description = "description"
    responses = {@ApiResponse(
        responseCode = "200", 
        description = "OK"            
    )}
)
public Response uploadFile(
@Parameter(name = "file", type = "string", format = "binary")
@FormDataParam("file") InputStream inputStream,
@FormDataParam("file") FormDataContentDisposition fileDetail
)throws RestException{
    //process file code
}