How to get client Ip Address in Java HttpServletRequest

Try this one. for all condition

private static final String[] HEADERS_TO_TRY = {
            "X-Forwarded-For",
            "Proxy-Client-IP",
            "WL-Proxy-Client-IP",
            "HTTP_X_FORWARDED_FOR",
            "HTTP_X_FORWARDED",
            "HTTP_X_CLUSTER_CLIENT_IP",
            "HTTP_CLIENT_IP",
            "HTTP_FORWARDED_FOR",
            "HTTP_FORWARDED",
            "HTTP_VIA",
            "REMOTE_ADDR" };

private String getClientIpAddress(HttpServletRequest request) {
    for (String header : HEADERS_TO_TRY) {
        String ip = request.getHeader(header);
        if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
            return ip;
        }
    }

    return request.getRemoteAddr();
}

In case, you are trying to get the IP-address for Dev-environment then you can use this:-

public String processRegistrationForm(HttpServletRequest request)
{
    String appUrl = request.getScheme() + "://"+ request.getLocalAddr();
    return appUrl;
}

The request.getLocalAddr() will return the IP-address of the request receiving system.

Hope it helps.

Try this one,

String ipAddress = request.getHeader("X-FORWARDED-FOR");  
if (ipAddress == null) {  
    ipAddress = request.getRemoteAddr();  
}

reference : http://www.mkyong.com/java/how-to-get-client-ip-address-in-java/