public static boolean upload(String url, String username, String password, File file) {
    FTPClient client = new FTPClient();
    FileInputStream fis = null;

    try {
        client.connect(url);
        client.login(username, password);

        fis = new FileInputStream(file);

        // Store file on server and logout
        boolean uploaded = client.storeFile(file.getName(), fis);

        client.logout();

        return uploaded;
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            if (fis != null) {
                fis.close();
            }
            client.disconnect();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    return false;
}