在服务器开发过程中,有时候为了方便,可以使用代码获取本机的IP地址,而不需要再手动配置了。阿里的代码一直是业界的标准,在看RocketMQ的源码的时候,看到了他们的一个获取本机IP地址的工具类,在这里给大家分享出来,有时候的拿来就可以使用。
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 (Exception e) {
log.error("Failed to obtain local address", e);
}
return null;
}
public static String normalizeHostAddress(final InetAddress localHost) {
if (localHost instanceof Inet6Address) {
return "[" + localHost.getHostAddress() + "]";
} else {
return localHost.getHostAddress();
}
}
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