TCP 单向通信

1.创建服务端

package com.yqq.app2;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

/**
 * @Author yqq
 * @Date 2021/11/04 22:29
 * @Version 1.0
 */
public class oneWaySocketServer {
    public static void main(String[] args) {
        BufferedReader br = null;
        Socket socket = null;
        PrintWriter pw = null;
        try {
            ServerSocket serverSocket = new ServerSocket(8888);
            System.out.println("服务端启动，等待监听");
            socket = serverSocket.accept();
            System.out.println("连接成功");
            //读取客户端发送的消息
            br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            //向客户端写回消息的流对象
            pw = new PrintWriter(socket.getOutputStream());
            while (true){
                String str = br.readLine();
                System.out.println("客户端谁："+str);
                if("exit".equals(str))
                    break;
                pw.println(str);
                pw.flush();
            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if(br != null) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(pw !=null)
                pw.close();
            if(socket!=null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

2.创建客户端

package com.yqq.app2;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;

/**
 * @Author yqq
 * @Date 2021/11/04 22:49
 * @Version 1.0
 */
public class oneWaySocketClient {
    public static void main(String[] args) {
        Socket socket =null;
        Scanner scanner =null;
        PrintWriter pw = null;
        BufferedReader br =null;
        try {
            socket = new Socket("127.0.0.1",8888);
            //创建键盘输入对象
            scanner = new Scanner(System.in);
            //创建服务端输出消息的流对象
            pw = new PrintWriter(socket.getOutputStream());
            //创建服务端返回消息的流对象
            br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            while (true){
                //通过键盘输入获取向服务端发送的消息
                String str = scanner.nextLine();
                //将消息发送服务端
                pw.println(str);
                pw.flush();
                if("exit".equals(str))
                    break;
                //读取服务端返回的消息
                String serverInput = br.readLine();
                System.out.println("服务端返回的"+serverInput);
            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if(scanner!=null)
                scanner.close();
            if(br!=null) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(pw!=null)
                pw.close();
            if(socket!=null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}