获取IP地址

/**
* 获取IP地址
* @Author  zysnba
* @param request
* @return  String
* @Date 2020年7月24日
*/
    public static String getIpAddr(HttpServletRequest request)
    {
        String ip = request.getHeader("X-Real-IP");
        if(!StringUtils.isBlank(ip) && !"unknown".equalsIgnoreCase(ip)) {
            return ip;
        }
        ip = request.getHeader("X-Forwarded-For");
        if(!StringUtils.isBlank(ip) && !"unknown".equalsIgnoreCase(ip))
        {
            int index = ip.indexOf(',');
            if(index != -1) {
                return ip.substring(0, index);
            } else {
                return ip;
            }
        }
        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;
    }