获取电脑IP

最新推荐文章于 2024-03-28 20:20:37 发布

原创最新推荐文章于 2024-03-28 20:20:37 发布 · 370 阅读

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本文详细介绍了一种在Java中获取客户端真实IP地址的方法，包括处理代理服务器和NAT转换等复杂情况，确保获取到的IP地址准确无误。

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public static String getIpAddress(HttpServletRequest request) {
        // 从X-Real-IP获取真实ip
        String ip = request.getHeader("X-Real-IP");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) { return ip; }
        // 从x-forwarded-for获取真实ip
        ip = request.getHeader("x-forwarded-for");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) {
            // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
            int index = ip.indexOf(",");
            if (index > 0) {
                ip = ip.substring(0, ip.indexOf(","));
            }
            return ip;
        }
        ip = request.getHeader("Proxy-Client-IP");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) { return ip; }
        ip = request.getHeader("WL-Proxy-Client-IP");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) { return ip; }
        ip = request.getHeader("HTTP_CLIENT_IP");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) { return ip; }
        ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        if (ip != null && ip.length() > 0 && !"unknown".equalsIgnoreCase(ip)) { return ip; }
        ip = request.getRemoteAddr();
        if ("127.0.0.1".equals(ip) || "0:0:0:0:0:0:0:1".equals(ip)) {
            // 根据网卡取本机配置的IP
            try {
                ip = InetAddress.getLocalHost().getHostAddress();
            } catch (UnknownHostException e) {
                // e.printStackTrace();
            }
        }
        return ip;
    }