客戶端從鍵盤輸入信息，發到服務端，服務端收到信息後，轉成大寫返回給客戶端。

原創

2020-02-21 05:04

Server

package com.hbsi.net;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class TCPServer {

/**
* @param args
*/
public static void main(String[] args) throws Exception{
ServerSocket ss=new ServerSocket(3366);
Socket s=ss.accept();
System.out.println(s.getInetAddress().getHostAddress()+"......connection");
InputStream in = s.getInputStream();
BufferedReader brin=new BufferedReader(new InputStreamReader(in));
BufferedWriter bwout=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));

String line=null;
while((line=brin.readLine())!=null){
   if(line.equals("over"))
    break;
   System.out.println("Client:"+line);

   bwout.write(line.toUpperCase());
   bwout.newLine();
   bwout.flush();
}
s.close();
ss.close();
}

}

Client

package com.hbsi.net;

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

public class TCPClient {

/**
* @param args
*/
public static void main(String[] args) throws Exception {
Socket s = new Socket("192.168.49.2", 3366);
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
BufferedWriter bwout = new BufferedWriter(new OutputStreamWriter(s
    .getOutputStream()));
BufferedReader brin = new BufferedReader(new InputStreamReader(s
    .getInputStream()));
String line = null;
while ((line = br.readLine()) != null) {
   if(line.equals("over"))
    break;
   bwout.write(line);
   bwout.newLine();
   bwout.flush();
   String str = brin.readLine();
   System.out.println("server:" + str);