手機號登入在現在的專案中用的場景非常多，實現起來也不難，今天我們就一起來通過演示實現登入過程。

<1>首先需要註冊個第三方的賬戶，比如秒嘀科技等，然後拿到三個引數值：QUERAY_PATH ACCOUNT_SID AUTH_TOKEN
<2>編寫獲取驗證碼類getMessage.java

private static final String QUERAY_PATH="xxxx";
    private static final String ACCOUNT_SID="xxx";
    private static final String AUTH_TOKEN="xxx"
 
;
    /**
     * @Title: getCode 
     * @Description: TODO( 傳送驗證碼 ) 
     * @param @param phone
     * @param @return    設定檔案 
     * @return String    返回型別 
     * @throws
     */
    public static String getCode(String phone){
        String ran = smsCode();
        String timestamp = getStamp();
        String sig  = getMD5(ACCOUNT_SID, AUTH_TOKEN, timestamp); 
        String tamp = "您的驗證碼為"
 
+ran+"，請於{2}分鐘內正確輸入，如非本人操作，請忽略此簡訊。";  
        OutputStreamWriter out = null;
        BufferedReader br = null;
        StringBuilder sb = new StringBuilder();
        try {
            URL url = new URL(QUERAY_PATH);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST"
 
);
            connection.setDoInput(true);
            connection.setDoOutput(true);
            connection.setConnectTimeout(5000);
            connection.setReadTimeout(10000);
            connection.setRequestProperty("Content-type", "application/x-www-form-urlencoded");
            out = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
            String args = getArgs(ACCOUNT_SID, tamp, phone, timestamp, sig, "JSON");
            out.write(args);
            out.flush();

            br = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
            String temp="";
            while ((temp=br.readLine())!=null) {
                sb.append(temp);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        JSONObject json = new JSONObject(sb.toString());
        String code = json.getString("respCode");
        String defaultrespcode = "00000"; 
        if(defaultrespcode.equals(code)){
            return ran;
        }else{
            return code;
        }

    }
    /**
     * @Title: getArgs 
     * @Description: TODO( 引數拼接 ) 
     * @param @param accountSid
     * @param @param smsContent
     * @param @param to
     * @param @param timestamp
     * @param @param sig
     * @param @param respDataType
     * @param @return    設定檔案 
     * @return String    返回型別 
     * @throws
     */
    public static String getArgs(String accountSid,String smsContent,String to,String timestamp,String sig,String respDataType){
        return "accountSid="+accountSid+"&smsContent="+smsContent+"&to="+to+"&timestamp="+timestamp+"&sig="+sig+"&respDataType="+respDataType;  
    }

    /**
     * @Title: getStamp 
     * @Description: TODO( 獲取時間戳 ) 
     * @param @return    設定檔案 
     * @return String    返回型別 
     * @throws
     */
    public static String getStamp(){
        return  new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
    }
    /**
     * @Title: getMD5 
     * @Description: TODO(sig簽名 ) 
     * @param @param sid
     * @param @param token
     * @param @param timestamp
     * @param @return    設定檔案 
     * @return String    返回型別 
     * @throws
     */
    public static String getMD5(String sid,String token,String timestamp){
        StringBuilder sBuilder = new StringBuilder();
        String source = sid + token + timestamp; 
        try {
            MessageDigest instance = MessageDigest.getInstance("MD5");
            byte[] digest = instance.digest(source.getBytes());
            for (byte b : digest) {
                String hexString = Integer.toHexString(b&0xff);
                if(hexString.length()==1){
                    sBuilder.append("0"+hexString);
                }else{
                    sBuilder.append(hexString);
                }
            }
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return sBuilder.toString();
    }
    /**
     * @Title: smsCode 
     * @Description: TODO( 產生驗證碼) 
     * @param @return    設定檔案 
     * @return String    返回型別 
     * @throws
     */
    public static String smsCode(){
        String random = new Random().nextInt(1000000)+"";
        if(random.length()!=6){
            return smsCode();
        }else{
            return random;
        }
    }

<3> 編寫servlet

protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        resp.setCharacterEncoding("utf-8");
        String phone = req.getParameter("phone");   
        String code = GetMessage.getCode(phone);
        //手機號登入後
        HttpSession session = req.getSession();
        PrintWriter out = resp.getWriter();
        //檢查手機號是否註冊過
        checkPhoneDao checkPhoneDao = new checkPhoneImpl();
        boolean results = checkPhoneDao.checkPhone(phone);
        if(!results){
            out.print(code);
            session.setAttribute("name", "phone");
        }else {
            out.print("此手機號沒有被註冊");
        }
        out.close();
    }

<4> dao 層實現 的方法

@Override
    public boolean checkPhone(String phone) {
        String sql = "select username from user where phone=?";
        List<Map<String, Object>> queryForList = DbUtil.queryForList(sql, phone);
        if(queryForList.isEmpty()){
            return true;
        }
        return false;
    }

到此，簡訊登入的功能已經實現了，大家可以按照我的思路嘗試去實現。注：由於有的小夥伴沒有框架基礎，所以演示使用jsp+servlet+jdbc實現的。有不懂的可以聯絡QQ:2217087909。