网络编程【七】Tcp学习--文本装换服务器

Tcp练习小Demo

客户端代码：

import java.net.*;
import java.io.*;
public class TcpClient {

	public static void main(String[] args)throws Exception {
		Socket s = new Socket("192.168.0.124",10003);
		
		BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
		BufferedWriter bufout = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
		BufferedReader bufin = new BufferedReader(new InputStreamReader(s.getInputStream()));
		String line = null;
		while((line=bufr.readLine())!=null){
			if("over".equals(line)){
				break;
			}
			//把键盘的输入传给服务端
			bufout.write(line);
			bufout.newLine();
			bufout.flush();
			
			
			//接收服务端返回的数据
			String str = bufin.readLine();
			System.out.println("Server::"+str);
		}
		bufr.close();
		s.close();
	}

}

服务端代码：

import java.net.*;
import java.io.*;
class TcpServer {

	public static void main(String[] args)throws Exception {
		ServerSocket ss = new ServerSocket(10003);
		Socket s = ss.accept();
		String ip = s.getInetAddress().getHostAddress();
		System.out.println(ip+"...已连接");
		
		BufferedWriter bufout = new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
		BufferedReader bufin = new BufferedReader(new InputStreamReader(s.getInputStream()));
		
		String line = null;
		while((line=bufin.readLine())!=null){
			System.out.println(line);
			bufout.write(line.toUpperCase());
			bufout.newLine();
			bufout.flush();
		}
		
		s.close();
		ss.close();
		
	}

}

首先运行服务端，然后运行客户端。客户端与服务端建立连接。客户端向服务端发送数据，服务端收到数据后，把小写转为大写，然后发送给客户端。
效果如下：
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