@PostMapping(value = "/singleFile")
    @ApiDoc(desc = "singleFile")
    public String singleFile(@RequestParam("file") final MultipartFile file) {
        return file.getOriginalFilename();
    }
mvc uploadFile.
@param file file
@return  response
shenyu-examples/shenyu-examples-springmvc-tomcat/src/main/java/org/apache/shenyu/examples/springmvc/controller/UploadController.java