在日常的开发过程中，很多情况我们要回去浏览器的信息，比如MAC地址等，那么今天就来看看在Java中，这么获取客户端（浏览器）的MAC地址，以及IP地址。

1.获取IP方式

public static String getIpAddress(HttpServletRequest request) {
    String ip = request.getHeader("X-real-ip");
    if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
        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();
    }
    return ip;
}

2.通过IP获取Mac地址

static String getMacAddrByIp(String ip) {
    String macAddr = null;
    try {
        Process process = Runtime.getRuntime().exec("nbtstat -a "   ip);
        BufferedReader br = new BufferedReader(
                new InputStreamReader(process.getInputStream()));
        Pattern pattern = Pattern.compile("([A-F0-9]{2}-){5}[A-F0-9]{2}");
        Matcher matcher;
        for (String strLine = br.readLine(); strLine != null;
             strLine = br.readLine()) {
            matcher = pattern.matcher(strLine);
            if (matcher.find()) {
                macAddr = matcher.group();
                break;
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    System.out.println(macAddr);
    return macAddr;
}


public static void main(String[] args) {
    String ip = "192.168.8.59";
    getMacAddrByIp(ip);
}

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