MultipartFile 不上传文件报错问题

MultipartFile 不上传文件报错问题

实例代码如下：

public static final String upload(String baseDir, MultipartFile file) throws IOException
    {
        try
        {
            return upload(baseDir, file, MimeTypeUtils.DEFAULT_ALLOWED_EXTENSION);
        }
        catch (Exception e)
        {
            throw new IOException(e.getMessage(), e);
        }
    }

如上述代码不上传文件，会报空指针异常，可修改为以下代码：

@RequiresPermissions("zhxc:personnel:add")
    @Log(title = "人才信息", businessType = BusinessType.INSERT)
    @PostMapping("/add")
    @ResponseBody
    public AjaxResult addSave(HttpServletRequest request,ZhxcVillagePersonnel zhxcVillagePersonnel)
    {
        MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
        MultipartFile file = multipartRequest.getFile("file");
        if(file != null ) {
            // 上传文件路径
            String filePath = RuoYiConfig.getUploadPath();
            // 上传并返回新文件名称
            String fileName;
            try {
                fileName = FileUploadUtils.upload(filePath, file);
            } catch (IOException e) {
                return AjaxResult.error("添加失败！");
            }
            zhxcVillagePersonnel.setPeImgurl(fileName);
        }
        return toAjax(zhxcVillagePersonnelService.insertZhxcVillagePersonnel(zhxcVillagePersonnel));
    }