java如何获取本地ip地址

在Java中获取本地IP地址可以通过以下方式之一：

1. 使用InetAddress类：

import java.net.InetAddress;
import java.net.UnknownHostException;

public class Main {
    public static void main(String[] args) {
        try {
            InetAddress localhost = InetAddress.getLocalHost();
            System.out.println("Local IP Address: " + localhost.getHostAddress());
        } catch (UnknownHostException e) {
            e.printStackTrace();
        }
    }
}

2. 使用NetworkInterface类：

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

public class Main {
    public static void main(String[] args) {
        try {
            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.isLoopbackAddress() && inetAddress.isSiteLocalAddress()) {
                        System.out.println("Local IP Address: " + inetAddress.getHostAddress());
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

这两种方法都可以获取本地IP地址，第一种方法使用了InetAddress类的getLocalHost()方法，直接获取本地IP地址，而第二种方法通过遍历所有网络接口和对应的InetAddress来获取本地IP地址。