TCP 双向通信

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;
import java.util.Scanner;

/**
 * @Author yqq
 * @Date 2021/11/06 22:43
 * @Version 1.0
 */
public class TwoWaySocketServer {
    public static void main(String[] args) {
        ServerSocket serverSocket = null;
        Socket socket =null;
        BufferedReader bufferedReader = null;
        Scanner scanner = null;
        PrintWriter printWriter =null;
        try{
            serverSocket = new ServerSocket(8888);
            System.out.println("服务端启动，监听端口8888");
            socket = serverSocket.accept();
            //创建从客户端读取消息的流对象
            bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            //创建键盘输入对象
            scanner = new Scanner(System.in);
            //创建向客户端发送消息的输出流对象
            printWriter=new PrintWriter(socket.getOutputStream());
            while (true){
                //读取客户端发送的消息
                String str = bufferedReader.readLine();
                System.out.println("客户端说："+str);
                String keyInput = scanner.nextLine();
                //发送到客户端
                printWriter.println(keyInput);
                printWriter.flush();
            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if(serverSocket != null) {
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(printWriter != null){
                printWriter.close();
            }
            if(bufferedReader!=null){
                try {
                    bufferedReader.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 2021/11/06 22:55
 * @Version 1.0
 */
public class TwoWaySocketClient {
    public static void main(String[] args) {
        Socket socket = null;
        Scanner scanner =null;
        PrintWriter printWriter=null;
        BufferedReader bufferedReader =null;
        try {
            socket = new Socket("127.0.0.7",8888);
            //创建键盘输入对象
            scanner=new Scanner(System.in);
            //向服务端发送消息的流对象
            printWriter=new PrintWriter(socket.getOutputStream());
            //创建读取服务端发送消息的流对象
            bufferedReader=new BufferedReader(new InputStreamReader(socket.getInputStream()));
            while (true){
                String keyInput = scanner.nextLine();
                printWriter.println(keyInput);
                printWriter.flush();
                String input = bufferedReader.readLine();
                System.out.println("服务端说："+input);
            }
        }catch (Exception e){
            e.printStackTrace();
        }finally {
            if(socket!=null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(bufferedReader!=null){
                try {
                    bufferedReader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if(scanner!=null){
                scanner.close();
            }
            if(printWriter!=null){
                printWriter.close();
            }
        }
    }
}