获取客户端IP地址/本机 ip 工具类

/**
 * 获取客户端真实IP地址
 * @param request
 * @return
 */
public static String getIpAddr(HttpServletRequest request) {
    String ip = request.getHeader("J-Forwarded-For");
    if(StringUtils.isBlank(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.getRemoteAddr();
    }
    if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
        ip = ip.split(",")[0];
    }


    return ip;
}

/**
 * 获取本机ip
 * @return
 */
public static String getHostIp(){
    try{
        Enumeration<NetworkInterface> allNetInterfaces = NetworkInterface.getNetworkInterfaces();
        while (allNetInterfaces.hasMoreElements()){
            NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();
            Enumeration<InetAddress> addresses = netInterface.getInetAddresses();
            while (addresses.hasMoreElements()){
                InetAddress ip = (InetAddress) addresses.nextElement();
                if (ip != null
                        && ip instanceof Inet4Address
                        && !ip.isLoopbackAddress() //loopback地址即本机地址，IPv4的loopback范围是127.0.0.0 ~ 127.255.255.255
                        && ip.getHostAddress().indexOf(":")==-1){
                    return ip.getHostAddress();
                }
            }
        }
    }catch(Exception e){
        e.printStackTrace();
    }
    return null;
}