记录一下JAVA获取请求访问的IP地址

挖坑专业

于 2018-08-01 13:58:14 发布

阅读量2.5k

点赞数

CC 4.0 BY-SA版权

分类专栏： Java

本文链接：https://blog.youkuaiyun.com/oneofJava/article/details/81329499

Java 专栏收录该内容

10 篇文章

订阅专栏

本文介绍了一种通过HttpServletRequest对象获取客户端真实IP地址的方法。该方法依次从请求头中查找多个字段来确定IP，若未找到则使用getRemoteAddr()方法，并针对内网IP进行了特殊处理。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

/**
     * 通过HttpServletRequest返回IP地址
     *
     * @param request HttpServletRequest
     * @return ip String
     * @throws Exception
     */
    private static String getIpAddr(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();
            if (LOCAL_IP.equals(ip) || LOCAL_IP1.equals(ip)) {
                InetAddress inet = null;
                try {
                    inet = InetAddress.getLocalHost();
                    ip = inet.getHostAddress();
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                }
            }
        }
        return ip;
    }