提交form表单判断是文件还是文本

CommonsMultipartResolver commonsMultipartResolver = 
        new CommonsMultipartResolver(request.getSession().getServletContext());
    boolean isMultipart = ServletFileUpload.isMultipartContent(request);
    if(isMultipart){
      
    }
     if (commonsMultipartResolver.isMultipart(request)){
       boolean multipart = commonsMultipartResolver.isMultipart(request);
       System.out.println(multipart);
     }