Upload de imagens de programa swing

try {
    // Construct data
    String data = URLEncoder.encode("key1", "UTF-8") + "=" + URLEncoder.encode("value1", "UTF-8");
    data += "&" + URLEncoder.encode("key2", "UTF-8") + "=" + URLEncoder.encode("value2", "UTF-8");

    // Send data
    URL url = new URL("http://hostname:80/cgi");
    URLConnection conn = url.openConnection();
    conn.setDoOutput(true);
    OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
    wr.write(data);
    wr.flush();

    // Get the response
    BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
    String line;
    while ((line = rd.readLine()) != null) {
        // Process line...
    }
    wr.close();
    rd.close();
} catch (Exception e) {
}

@Override
    protected void doPost(HttpServletRequest request,  
            HttpServletResponse response) throws IOException, ServletException  {
        //response.setContentType("multipart/form-data;charset=UTF-8");
        
        boolean isMultipart = ServletFileUpload.isMultipartContent(request);
        if (!isMultipart) {
            System.out.println("Não é multipart");
            response.getWriter().println("Não é multipart");
        } else {
            System.out.println("Iniciando upload para o servidor");
            response.getWriter().println("Iniciando upload para o servidor!");
            FileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);
            upload.setSizeMax[telefone removido]);
            List items = null;
            try {
                items = upload.parseRequest(request);
            } catch (FileUploadException e) {
                e.printStackTrace();
            }
            Iterator itr = items.iterator();
            while (itr.hasNext()) {
                FileItem item = (FileItem) itr.next();
                if (item != null) {
                    if (item.isFormField()) {
                    } else {
                        try {
                            String itemName = item.getName();
                            String location = "/teste/";
                            int index = itemName.lastIndexOf("\\") + 1;
                            String fileName = itemName.substring(index, itemName.length());
                            System.out.println("File Name: " + fileName);
                            GenericServlet config = null;
                            File savedFile = new File(location + fileName);
                            item.write(savedFile);
                            System.out.println("Salvou no local:" + location + fileName);
                            response.getWriter().println("Upload realizado com sucesso em "+location+fileName);
                        } catch (Exception e) {
                            response.getWriter().println("Erro ao fazer upload: "+e.getMessage());
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    }