文件下载feign调用-ResponseEntity＜byte[]＞

controller

@ApiOperation(value = "下载文件", notes = "下载文件", httpMethod = "GET", response = WebResult.class)
    @RequestMapping(value = "/download", method = RequestMethod.GET)
    public void downloadFile(@RequestParam(name = "id") String id,
                             @RequestParam(name = "fileExt", defaultValue = "", required = false) String fileExt,
                             @RequestParam(name = "fileName", defaultValue = "", required = false) String fileName,
                             HttpServletRequest request, HttpServletResponse response) throws Exception