public  InetAddress getFirstNonLoopbackAddress(boolean preferIpv4, boolean preferIPv6) throws SocketException {        Enumeration en = NetworkInterface.getNetworkInterfaces();        while (en.hasMoreElements()) {            NetworkInterface i = (NetworkInterface) en.nextElement();            for (Enumeration en2 = i.getInetAddresses(); en2.hasMoreElements();) {                InetAddress addr = (InetAddress) en2.nextElement();                if (!addr.isLoopbackAddress()) {                    if (addr instanceof Inet4Address) {                        if (preferIPv6) {                            continue;                        }                        return addr;                    }                    if (addr instanceof Inet6Address) {                        if (preferIpv4) {                            continue;                        }                        return addr;                    }                }            }        }        return null;    }

调用方法：

getFirstNonLoopbackAddress(true,false).getHostAddress();