Java获取客户端请求IP，以及获取本机所有网卡的ip

   //获取客户端ip
    public static String getIpAddr(HttpServletRequest request) {
        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.getRemoteAddr();
        }
        return ip;
    }
    
   //获取本机所有ip（多网卡）
    public static List<String> getLocalhostIp() {
        List<String> ips = new ArrayList<String>();
        try {
            Enumeration<NetworkInterface> nis = NetworkInterface.getNetworkInterfaces();
            InetAddress ia = null;
            while (nis.hasMoreElements()) {
                NetworkInterface ni = (NetworkInterface) nis.nextElement();
                Enumeration<InetAddress> ias = ni.getInetAddresses();
                while (ias.hasMoreElements()) {
                    ia = ias.nextElement();
                    if (ia instanceof Inet6Address)
                        continue;
                    if ("127.0.0.1".equals(ia.getHostAddress()))
                        continue;
                    ips.add(ia.getHostAddress());
                }
            }
        } catch (SocketException e) {
            throw new RuntimeException(e);
        }
        return ips;
    }