自己用java实现飞鸽传书 1 - 实现通信

import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    
    public static void main(String[] args){
        //创建服务端socket，用以网络信息的接收
        ServerSocket serverSocket = null;
        try {
            //服务端socket使用本地IP，端口号使用36000
            serverSocket = new ServerSocket(36000);
            //保证服务端持续运行
            while(true){
                //接收网络信息，未接收到则阻塞当前线程
                Socket socket = serverSocket.accept();
                //获取服务端输出流
                PrintStream ps = new PrintStream(socket.getOutputStream());
                //向输出流中追加信息
                ps.append("你好，这里是服务端！");
                //关闭输出流和socket
                ps.close();
                socket.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.Socket;

public class Client {

    public static void main(String[] args){
        BufferedReader reader = null;
        Socket socket = null;
        try {
            //创建客户端socket，用以连接服务端
            socket = new Socket("127.0.0.1", 36000);
            //读取服务端传来的字节流
            reader = new BufferedReader(
                        new InputStreamReader(socket.getInputStream()) );
            //读取字节流中的信息，并以字符串输出
            StringBuilder builder = new StringBuilder();
            String line;
            while((line=reader.readLine()) != null){
                builder.append(line).append("\n");
            }
            System.out.println(builder.toString());
            //关闭reader和socket
            reader.close();
            socket.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}