@Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { // TODO Auto-generated method stub super.doGet(req, resp); String username = getUserName(); String password = getPassword(); String twitterUserName = getTwitterUserName(); String twitterPassword = getTwitterUserPassword(); String email = getEmail(); if (Utils.isEmpty(username) || Utils.isEmpty(password)) { sendRegisterHtml(); } else { boolean result = false; // Add an new user. result = SqliteManager.getInstance() .addUser(username, password, "", "", email, CONSUMER_KEY, CONSUMER_SECRET); if (result) { out.println("Register success"); try { AccountInfo accountInfo = getAccountInfo(); accountInfo.setTwitterConsumerKey(CONSUMER_KEY); accountInfo.setTwitterConsumerSecret(CONSUMER_SECRET); } catch (Exception e) { e.printStackTrace(); } } else { out.println("Register failed,maybe the user already existed,please use another name."); } } }