how do I upload an image in java? I have the following code

If I insert the name of the image into the database but it does not save the image in the path I give it, I get the following error:

  

Exception: the request does not contain a multipart / form-data or   multipart / form-data stream, content type header is nullException: the   request does not contain a multipart / form-data or multipart / form-data   stream, content type header is   nullorg.apache.commons.fileupload.disk.DiskFileItemFactory@7641070d

 <form action="uploadfile" method="GET" enctype="multipart/form-data">
            <table>
                <tr>
                    <td>
                        <input type="text" id="file_name" name="nombre">
                        <input type="file" name="file" id="file" value="Seleccione Imagen"/>
                        <input type="submit" value="SUBIR ARCHIVO"/>
                    </td>
                </tr>
            </table>
        </form>

and I use javascript to separate a false route that gives me and I just select the name of the image:

   $(function(){
       $("#file").change(function(){
            var name = $("#file").val();
            var arreglo = name.split("\"); 
            console.log(arreglo);
            var image_name = arreglo[2];
            $("#file_name").val(image_name);
       });
   });

in the servlet I have the following code:

try{
         ConectaDB conect = new ConectaDB();
          Connection c = conect.conectar();
          String archivo = request.getParameter("file");  
          System.out.println(archivo);
          String nombre = "venta";
          String img_producto= "imagenes/"+archivo;
          int id_categoria=2;
          float precio = 2200;
          int stock = 10;

          String query = "INSERT INTO productos(nombre,img_producto,id_categoria, precio,stock) VALUES ('"+nombre+"','"+img_producto+"','"+id_categoria+"','"+precio+"','"+stock+"');";
            Statement stm = c.createStatement();
            stm.executeUpdate(query);
            stm.close();
            c.close();
            System.out.println(query);
        }catch(SQLException sqlx) {

            sqlx.printStackTrace();

        }
            String archivourl = /home/luis/Escritorio/prueba/web/imagenes";

            DiskFileItemFactory factory = new DiskFileItemFactory();

            factory.setSizeThreshold(1024);

            factory.setRepository(new File(archivourl));

            ServletFileUpload upload = new ServletFileUpload(factory);


            try{

                List<FileItem> partes = upload.parseRequest(request);

                for(FileItem items: partes){
                    File file = new File(archivourl,items.getName());
                    items.write(file);
                }
                response.sendRedirect("index.jsp");
                out.print("<h2>ARCHIVO CORRECTAMENTE SUBIDO.....</h2>"+"\n\n"+"<a href='index.jsp'>VOVLER AL MENU</a>");

            }catch(Exception e){
                out.print("Exception: "+e.getMessage()+"");
            }
    }