code in RemotingUtil `public static String getLocalAddress() { try { // Traversal Network interface to get the first non-loopback and non-private address Enumeration enumeration = NetworkInterface.getNetworkInterfaces(); ArrayList ipv4Result = new ArrayList(); ArrayList ipv6Result = new ArrayList(); while (enumeration.hasMoreElements()) { final NetworkInterface networkInterface = enumeration.nextElement(); final Enumeration 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 (Exception e) {
log.error("Failed to obtain local address", e);
}
return null;
}`
原提问者GitHub用户liyiwen3
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