@WebServlet("/uploadDisplayServlet")
@MultipartConfig
public class UploadDisplayServlet extends HttpServlet {

  private Logger logger = Logger.getLogger(UploadDisplayServlet.class.getName());

  private static final long serialVersionUID = 1L;

  @Override
  protected void doPost(HttpServletRequest request,
      HttpServletResponse response) throws ServletException, IOException {
    // Retrieves <input type="file" name="file" multiple="true">
    List<Part> fileParts = request.getParts()
        .stream()
        .filter(part -> "file".equals(part.getName()))
        .collect(
            Collectors.toList());

    for (Part filePart : fileParts) {
      String fileName = Paths.get(filePart.getSubmittedFileName())
          .getFileName()
          .toString(); // MSIE fix.
      InputStream fileContent = filePart.getInputStream();

      HttpPost uploadFile = new HttpPost(RestConstats.getDevicesUpload());
      //      uploadFile.setHeader(SystemRequestBuilder.H_AUTH, RestConstats.getAUTH());
      uploadFile.setHeader(SystemRequestBuilder.H_AUTH,
          "Basic TWF4aW0uU2F2a29Ac29mdGVxLmNvbToxQFFXYXN6eA==");

      MultipartEntityBuilder builder = MultipartEntityBuilder.create();
      builder.addTextBody("plain_text", fileName, ContentType.TEXT_PLAIN);
      builder.addBinaryBody("file", fileContent,
          ContentType.APPLICATION_OCTET_STREAM, fileName
      );

      HttpEntity multipart = builder.build();
      uploadFile.setEntity(multipart);

      CloseableHttpClient closeableHttpClient = HttpClients.createDefault();
      CloseableHttpResponse closeableHttpResponse = closeableHttpClient.execute(uploadFile);
      HttpEntity httpEntity = closeableHttpResponse.getEntity();
    }
  }
}