TCP发送消息（Java）

将客户端发送的消息传递给服务器端，逆转后输出

客户端：

import java.io.*; import java.net.Socket; import java.util.Scanner; /** * Created by Administrator on 2020/6/30. */ public class socket01 { public static void main(String[] args) throws IOException { Scanner sc = new Scanner(System.in); Socket socket = new Socket("127.0.0.1",54321); BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream())); //输入流 PrintStream ps = new PrintStream(socket.getOutputStream()); //输出流 ps.println(sc.nextLine()); System.out.println(br.readLine()); } }

服务器端：

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintStream; import java.net.ServerSocket; import java.net.Socket; /** * Created by Administrator on 2020/6/30. */ public class socket02 { public static void main(String[] args) throws IOException { ServerSocket server=new ServerSocket(54321); System.out.println("服务器启动"); while (true){ Socket socket = server.accept(); new Thread(){ public void run(){ try { BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream())); //输入流 PrintStream ps = new PrintStream(socket.getOutputStream()); //输出流 String line = br.readLine(); line = new StringBuilder(line).reverse().toString(); ps.println(line); socket.close(); } catch (IOException e) { e.printStackTrace(); } } }.start(); } } }