Sample code for client/server MultipartRequest usage in Codename One

MultipartClientSample.java

MultipartRequest request = new MultipartRequest();
request.setUrl(url);
request.addData("myFileName", fullPathToFile, "text/plain")
NetworkManager.getInstance().addToQueue(request);

UploadServlet.java

@WebServlet(name = "UploadServlet", urlPatterns = {"/upload"})
@MultipartConfig(fileSizeThreshold = 1024 * 1024 * 100, // 10 MB
        maxFileSize = 1024 * 1024 * 150, // 50 MB
        maxRequestSize = 1024 * 1024 * 200)      // 100 MB
public class UploadServlet extends HttpServlet {

    @Override
    public void doPost(HttpServletRequest req, HttpServletResponse res)
            throws ServletException, IOException {
        Collection<Part> parts = req.getParts();
        Part data = parts.iterator().next();
        try(InputStream is = data.getInputStream()) {}
            // store or do something with the input stream
        }
    }
}

Sample usage of MultipartRequest.

From the Codename One project