java web项目获取客户端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;
}

 static {

        Enumeration e1;

        try {

            e1 = (Enumeration) NetworkInterface.getNetworkInterfaces();

            while (e1.hasMoreElements()) {

                NetworkInterface ni = (NetworkInterface) e1.nextElement();

                if (!ni.getName().equals( "eth0")) {

                    continue;

                } else {

                    Enumeration e2 = ni.getInetAddresses();

                    while (e2.hasMoreElements()) {

                        InetAddress ia = (InetAddress) e2.nextElement();

                        if (ia instanceof Inet6Address){

                            continue;

                        }

                        currentIP = ia.getHostAddress();

                    }

                    break;

                }

            }

        } catch (SocketException e) {

           e.getMessage();

        }

    }