SpringBoot 獲取客戶端 ip

/**
     * 獲取客戶端ip地址
     * @param request
     * @return
     */
    public static String getCliectIp(HttpServletRequest request)
    {
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.trim() == "" || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.trim() == "" || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.trim() == "" || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }

        // 多個路由時，取第一個非unknown的ip
        final String[] arr = ip.split(",");
        for (final String str : arr) {
            if (!"unknown".equalsIgnoreCase(str)) {
                ip = str;
                break;
            }
        }
        return ip;
    }