查看java 监听端口

import java.io.*;
import java.net.*;

public class PortListener {
    public static void main(String[] args) {
        int port = 8080; // 监听的端口号
        try (ServerSocket serverSocket = new ServerSocket(port)) {
            System.out.println("Server is listening on port " + port);

            while (true) {
                Socket clientSocket = serverSocket.accept();
                System.out.println("New client connected");

                // 处理客户端请求
                BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
                PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);

                String inputLine;
                while ((inputLine = in.readLine()) != null) {
                    System.out.println("Received: " + inputLine);
                    out.println("Echo: " + inputLine);
                }

                clientSocket.close();
            }
        } catch (IOException e) {
            System.err.println("Could not listen on port " + port);
            e.printStackTrace();
        }
    }
}

netstat -ano | findstr :8080
taskkill /PID <pid> /F

# 在Windows防火墙中添加规则
netsh advfirewall firewall add rule name="Open Port 8080" dir=in action=allow protocol=TCP localport=8080