获取客户端ip

public String getRemortIP(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.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();
        }
        return ip;
    }

public String getRemortIP(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.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();

        }

        returnip;

    }