记录一下JAVA获取请求访问的IP地址

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原创最新推荐文章于 2026-06-02 16:18:51 发布 2.5k 阅读 AI 写同款· GEO 优化 ›

Java根据ip地址获取归属地最近，各大平台都新增了评论区显示发言者ip归属地的功能，例如哔哩哔哩，微博，知乎等等。对这里出现的几个名词解释一下：X-Forwarded-For：一个 HTTP 扩展头部，主要是为了让 Web 服务器获取访问用户的真实 IP 地址。每个 IP 地址，每个值通过逗号+空格分开，最左边是最原始客户端的 IP 地址，中间如果有多层代理，每⼀层代理会将连接它的客户端 IP 追加在 X-Forwarded-For 右边。Proxy-Client-IP：这个一般是经过 Apache http 服务器的请求才会有阅读详情

/**
     * 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;
    }

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