java如何獲取本地ip地址

在Java中獲取本地IP地址可以通過以下方式之一：

1. 使用InetAddress類：

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類：

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();
        }
    }
}

這兩種方法都可以獲取本地IP地址，第一種方法使用了InetAddress類的getLocalHost()方法，直接獲取本地IP地址，而第二種方法通過遍歷所有網(wǎng)絡(luò)接口和對應(yīng)的InetAddress來獲取本地IP地址。