使用Postman对@RequestPart和HttpServletRequest组合传参方式

方法代码如下：

    /**
     * 发布
     */
    @ApiOperation("发布")
    @ApiImplicitParams({
            @ApiImplicitParam(name = "req", value = "json格式", dataType = "Map", dataTypeClass = Map.class),
            @ApiImplicitParam(name = "file", value = "文件", dataType = "File", dataTypeClass = File.class)
    })
    @PostMapping("/publish")
    public AjaxResult publish(@Validated @RequestPart("req") BizDemandInfo entity, HttpServletRequest request) throws IOException {
        List<MultipartFile> fileList = ((MultipartHttpServletRequest) request).getFiles("file");
        // 限制上传文件大小，单位是字节
        final long MAX_FILE_SIZE = 10 * 1024 * 1024; // 10MB
        // 限制上传文件的数量
        final int MAX_FILES = 5;
        List<BizDemandAttachment> attachmentList = new ArrayList<>();
        if (!fileList.isEmpty()) {
            //上传文件数不能大于5
            if (fileList.size() > MAX_FILES) {
                log.error("上传文件数不能大于5");
                return AjaxResult.error("上传文件数不能大于5");
            }
            for (MultipartFile file : fileList) {
                //每个文件不能大于10M
                if (file.getSize() > MAX_FILE_SIZE) {
                    log.error("每个文件不能大于10M");
                    return AjaxResult.error("每个文件不能大于10M");
                }
                String url = FileUploadUtils.uploadMinio(Constants.MINIO_BUCKET_NAME_DEMAND, file);
                String fileName = file.getOriginalFilename();
                BizDemandAttachment attachment = new BizDemandAttachment();
                attachment.setAttachmentName(fileName);
                attachment.setAttachmentUrl(url);
                attachmentList.add(attachment);
            }
        }
        entity.setBizDemandAttachmentList(attachmentList);
        String createBy = getUsername();
        entity.setCreateBy(createBy);
        String id = service.insert(entity);
        return StringUtils.isNoneBlank(id) ? AjaxResult.success(id) : AjaxResult.error();
    }