在 Java 程序中，我们可以通过如下代码获取本地的 ip 地址：
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| InetAddress.getLocalHost().getHostAddress()
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但由于安装了虚拟机，或者由于本地回环网的问题，获取的 ip 地址可能不是想要的那个。可以采用如下方法获取到所有的 ip 地址列表，再做筛选。
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| package gy.finolo.ipdemo;
import java.net.*;
import java.util.Enumeration;
public class IPDemo {
public static void main(String[] args) throws UnknownHostException, SocketException {
System.out.println(InetAddress.getLocalHost().getHostAddress());
Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
while (networkInterfaces.hasMoreElements()) {
NetworkInterface networkInterface = networkInterfaces.nextElement();
Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
while (inetAddresses.hasMoreElements()) {
InetAddress inetAddress = inetAddresses.nextElement();
if (inetAddress instanceof Inet4Address) {
System.out.println(inetAddress.getHostAddress() + " loopback: " + inetAddress.isLoopbackAddress() +
" linklocal: " + inetAddress.isLinkLocalAddress() +
" sitelocal: " + inetAddress.isSiteLocalAddress());
}
if (inetAddress instanceof Inet6Address) {
System.out.println(((Inet6Address) inetAddress).getScopedInterface());
}
}
}
}
}
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如果还不能区分，那就可能需要通过网卡名字来过滤了，这个是需要用到 Inet6Address 了。