获取本地ip地址

LocalAddress.java

public static String getLocalAddress() {
    try {
        // Traversal Network interface to get the first non-loopback and non-private address
        Enumeration<NetworkInterface> enumeration = NetworkInterface.getNetworkInterfaces();
        ArrayList<String> ipv4Result = new ArrayList<String>();
        ArrayList<String> ipv6Result = new ArrayList<String>();
        while (enumeration.hasMoreElements()) {
            final NetworkInterface networkInterface = enumeration.nextElement();
            final Enumeration<InetAddress> en = networkInterface.getInetAddresses();
            while (en.hasMoreElements()) {
                final InetAddress address = en.nextElement();
                if (!address.isLoopbackAddress()) {
                    if (address instanceof Inet6Address) {
                        ipv6Result.add(normalizeHostAddress(address));
                    }
                    else {
                        ipv4Result.add(normalizeHostAddress(address));
                    }
                }
            }
        }

        // prefer ipv4
        if (!ipv4Result.isEmpty()) {
            for (String ip : ipv4Result) {
                if (ip.startsWith("127.0") || ip.startsWith("192.168")) {
                    continue;
                }

                return ip;
            }

            return ipv4Result.get(ipv4Result.size() - 1);
        }else if (!ipv6Result.isEmpty()) {
            return ipv6Result.get(0);
        }
        //If failed to find,fall back to localhost
        final InetAddress localHost = InetAddress.getLocalHost();
        return normalizeHostAddress(localHost);
    }
    catch (SocketException e) {
        e.printStackTrace();
    }
    catch (UnknownHostException e) {
        e.printStackTrace();
    }

    return null;
}


public static String normalizeHostAddress(final InetAddress localHost) {
    if (localHost instanceof Inet6Address) {
        return "[" + localHost.getHostAddress() + "]";
    }
    else {
        return localHost.getHostAddress();
    }
}

from RocketMQ