Java获得登录的IP和MAC地址

     /**
     * 通过HttpServletRequest返回IP地址
     * @param request HttpServletRequest
     * @return ip String
     * @throws Exception
     */
    public String getIpAddr(HttpServletRequest request) throws Exception {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        return ip;
    }

     /**
     * 通过IP地址获取MAC地址
     * @param ip String,127.0.0.1格式
     * @return mac String
     * @throws Exception
     */
    public String getMACAddress(String ip) throws Exception {
        String line = "";
        String macAddress = "";
        final String MAC_ADDRESS_PREFIX = "MAC Address = ";
        final String LOOPBACK_ADDRESS = "127.0.0.1";
        //如果为127.0.0.1,则获取本地MAC地址。
        if (LOOPBACK_ADDRESS.equals(ip)) {
            InetAddress inetAddress = InetAddress.getLocalHost();
            //貌似此方法需要JDK1.6。
            byte[] mac = NetworkInterface.getByInetAddress(inetAddress).getHardwareAddress();
            //下面代码是把mac地址拼装成String
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < mac.length; i++) {
                if (i != 0) {
                    sb.append("-");
                }
                //mac[i] & 0xFF 是为了把byte转化为正整数
                String s = Integer.toHexString(mac[i] & 0xFF);
                sb.append(s.length() == 1 ? 0 + s : s);
            }
            //把字符串所有小写字母改为大写成为正规的mac地址并返回
            macAddress = sb.toString().trim().toUpperCase();
            return macAddress;
        }
        //获取非本地IP的MAC地址
        try {
            Process p = Runtime.getRuntime().exec("nbtstat -A " + ip);
            InputStreamReader isr = new InputStreamReader(p.getInputStream());
            BufferedReader br = new BufferedReader(isr);
            while ((line = br.readLine()) != null) {
                if (line != null) {
                    int index = line.indexOf(MAC_ADDRESS_PREFIX);
                    if (index != -1) {
                        macAddress = line.substring(index + MAC_ADDRESS_PREFIX.length()).trim().toUpperCase();
                    }
                }
            }
            br.close();
        } catch (IOException e) {
            e.printStackTrace(System.out);
        }
        return macAddress;
    }

引用

声明：本资料来源于互联网，如有雷同，纯属必然。
局域网内可以执行，我没有测试外网，多谢sunlightcs。

评论

1 楼 sunlightcs 2010-11-29  

在局域网外，获取不到mac地址吧。