Java如何从接口里获取IP

Java可以通过以下代码从接口中获取IP地址：

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

public class GetIPAddress {
    public static void main(String[] args) {
        try {
            Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
            while (interfaces.hasMoreElements()) {
                NetworkInterface ni = interfaces.nextElement();
                Enumeration<InetAddress> addresses = ni.getInetAddresses();
                while (addresses.hasMoreElements()) {
                    InetAddress addr = addresses.nextElement();
                    if (!addr.isLinkLocalAddress() && !addr.isLoopbackAddress() && addr.isSiteLocalAddress()) {
                        System.out.println("IP地址：" + addr.getHostAddress());
                    }
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }
    }
}

这段代码会遍历所有的网络接口，然后获取每个接口的IP地址。在获取IP地址时，会过滤掉回环地址和链路本地地址，只输出站点本地地址。