IPKit

IPKit.java

import javax.servlet.http.HttpServletRequest;

public class IpKit {
	
	public static String getRealIp(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;
	}
	
	public static String getRealIpV2(HttpServletRequest request) {
		String accessIP = request.getHeader("x-forwarded-for");
        if (null == accessIP)
            return request.getRemoteAddr();
        return accessIP;
	}
}