TCP服务端和客户端（二）（在客户端的控制台可以不断输入数据）

客户端使用Scanner scanner = new Scanner(System.in)

客户端代码

package tcp;

import java.io.*;
import java.net.Socket;
import java.util.Scanner;

public class TCPClients {
    private static final int PORT = 1000;
    private static final String IP = "127.0.0.1";
    public static void main(String[] args) throws Exception {
       //3.创建socket对象，建立服务端远程连接
       Socket socket = new Socket(IP,PORT);
       InputStream is = socket.getInputStream();
       BufferedReader  br = new BufferedReader(new InputStreamReader(is));

       OutputStream os = socket.getOutputStream();
       PrintWriter pw = new PrintWriter(os,true);  //可以自动刷新，不需要像bw.flush那样手动刷新
       //向服务端发送数据(在控制台输入数据)
       Scanner scanner = new Scanner(System.in);
       while(scanner.hasNextLine()){
           String line = scanner.nextLine();
           pw.println(line);
           //接收来自服务端的响应
//           String response;
//           while ((response = br.readLine()) != null){
//               System.out.println(response);
//           }     //错误代码  在控制台只能输入一条数据并得到回复，再次发送第二条数据时，就会一直阻塞等待（服务端针对每一条数据的响应只有一句话）
           String response = br.readLine();
           System.out.println(response);
       }
   }
}

服务端代码

package tcp;

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

public class TCPServer {
    private static final int PORT = 1000;
    public static void main(String[] args) throws IOException {
        //1.启动TCP连接
        ServerSocket serverSocket = new ServerSocket(PORT);
        //2.accept监听客户端连接   阻塞等待新的客户端连接
        while(true) {
               Socket socket = serverSocket.accept();
               InputStream is = socket.getInputStream();
               BufferedReader br = new BufferedReader(new InputStreamReader(is));

               OutputStream os = socket.getOutputStream();
               BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os));
               String line;
               //先接收来自客户端的消息，然后做出响应
               while((line = br.readLine()) != null) {
                   System.out.println("接收到：" + line + "消息");
                   //对客户端发送的消息做出响应
                   //字符串最终的“\n”不能忘记
                   //否则客户端 (response = br.readLine() 会阻塞
                   //readLine()读取到"\n"才会认为已经读取完毕，然后返回"\n"之前的字符串
                   bw.write("消息已成功接收\n");
                   //flush刷新缓冲区
                   bw.flush();
               }
        }
    }
}

运行结果

客户端

服务端