java服务端获得客户端IP和MAC

java服务端获得客户端IP和MAC

1.概述

之前在很多博客上看到关于java服务端获得客户端IP和MAC，其中有关于处理localhost访问IPv6返回ip为0:0:0:0:0:0:0:1的问题，基本都是修改hosts文件，但是我个人按照上述方法处理后没有解决。所以我就采用在java代码里通过判断字符串localhost，将其转成127.0.0.1来解决此问题（可能这样解决不太好）。另外还有获取mac地址时乱码，我个人是通过在命令行里直接执行nbtstat -A [ip],根据获得的内容来进行取值的。

2.详细代码

代码仅供参考，有不足之处，还望不吝指出。

public class IPAndMAC{    public static final String MAC_ADDRESS_PREFIX01 = "MAC Address = ";    public static final String MAC_ADDRESS_PREFIX02 = "MAC 地址 = ";    public static final String LOOPBACK_ADDRESS = "127.0.0.1";    public static final String IPv6Address = "0:0:0:0:0:0:0:1";    private Map stationScreenAndIP = new HashMap<>();    public Map getStationScreenAndIP() {        return stationScreenAndIP;    }    public void setStationScreenAndIP(Map stationScreenAndIP) {        this.stationScreenAndIP = stationScreenAndIP;    }    /**     * 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();        }        //如果使用localhost访问，对于windows IPv6会返回0:0:0:0:0:0:0:1，将其转为127.0.0.1        if (IPv6Address.equals(ip)) {            ip = LOOPBACK_ADDRESS;        }        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 = "";        //如果为127.0.0.1,则获取本地MAC地址。        if (LOOPBACK_ADDRESS.equals(ip)) {            InetAddress inetAddress = InetAddress.getLocalHost();            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("-");                }                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        Process p = Runtime.getRuntime().exec("nbtstat -A " + ip);        InputStreamReader isr = new InputStreamReader(p.getInputStream(), "GBK");        BufferedReader br = new BufferedReader(isr);        while ((line = br.readLine()) != null) {            if (line != null) {                //英文环境下，命令行执行nbtstat -A [ip] 返回结果包含"MAC Address ="                if (line.contains(MAC_ADDRESS_PREFIX01)) {                    macAddress = fromLineToGetMacAddress(line, MAC_ADDRESS_PREFIX01);                }                //中文环境下，命令行执行nbtstat -A [ip] 返回结果包含"MAC 地址 ="                if (line.contains(MAC_ADDRESS_PREFIX02)) {                    macAddress = fromLineToGetMacAddress(line, MAC_ADDRESS_PREFIX02);                }            }        }        br.close();        return macAddress;    }    public String fromLineToGetMacAddress(String line, String MAC_ADDRESS_PREFIX) {        String macAddress = "";        int index = line.indexOf(MAC_ADDRESS_PREFIX);        if (index != -1) {            macAddress = line.substring(index + MAC_ADDRESS_PREFIX.length()).trim().toUpperCase();        }        return macAddress;    }}