java获取ip和端口号

在Java中获取IP和端口号的方法有多种，以下是其中两种常用的方式：

1.使用Socket类获取本地IP和端口号：

import java.net.*;

public class GetLocalIpAndPort {
    public static void main(String[] args) throws UnknownHostException {
        InetAddress inetAddress = InetAddress.getLocalHost();
        String ip = inetAddress.getHostAddress();
        System.out.println("本机IP地址：" + ip);

        Socket socket = new Socket();
        socket.connect(new InetSocketAddress(ip, 0));
        int port = socket.getLocalPort();
        System.out.println("本机端口号：" + port);
    }
}

2.使用ServerSocket类获取本地IP和端口号：

import java.net.*;

public class GetLocalIpAndPort {
    public static void main(String[] args) throws UnknownHostException {
        try (ServerSocket serverSocket = new ServerSocket(0)) {
            InetAddress inetAddress = InetAddress.getLocalHost();
            String ip = inetAddress.getHostAddress();
            System.out.println("本机IP地址：" + ip);

            int port = serverSocket.getLocalPort();
            System.out.println("本机端口号：" + port);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

以上两种方式都可以获取本机IP和随机端口号，如果需要指定端口号，可以将0替换为需要的端口号。