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【Java】获取访问者真实ip

作者:Alpha / 发布于2016/5/10/ 776

public static String getUserIp(HttpServletRequest request) {
    String ip = request.getHeader("X-Forwarded-For");
    if (StringUtils.isNotBlank(ip) && !"unknown".equalsIgnoreCase(ip)) {
        // 多次反向代理后会有多个IP值，第一个不为 unknow 的才为真实IP
        String[] ips = StringUtils.split(ip, ",");
        for (String i : ips) {
            i = StringUtils.trim(i);
            if (StringUtils.isNotBlank(i) && !"unknown".equalsIgnoreCase(i)) {
                ip = i;
                break;
            }
        }
    }
    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;
}

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　访问者　　真实ip　

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