TCP-Java-客户机/服务器应用程序例子

最新推荐文章于 2021-08-05 23:46:04 发布

原创最新推荐文章于 2021-08-05 23:46:04 发布 · 1.2k 阅读

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本文提供了一个简单的TCP客户端和服务器实现案例。客户端通过输入文本发送到服务器，服务器接收到文本后将其转换为大写并返回给客户端。该示例使用Java编写，包括创建Socket连接、读写数据等关键步骤。

TCP-Client:

import java.io.*;
import java.net.*;

public class Client {
	public static void main(String argv[]) throws Exception{
		String sentence;
		String modifiedSentence;
		BufferedReader inFromUser = 
				new BufferedReader(
						new InputStreamReader(
								System.in));
		Socket clientSocket = new Socket("localhost",6789);
		DataOutputStream outToServer = 
				new DataOutputStream(
						clientSocket.getOutputStream());
		BufferedReader inFromServer = 
				new BufferedReader(
						new InputStreamReader(
								clientSocket.getInputStream()));
		sentence = inFromUser.readLine();
		outToServer.writeBytes(sentence + '\n');
		modifiedSentence = inFromServer.readLine();
		System.out.println("FROM SERVER: " + 
				modifiedSentence);
		clientSocket.close();
	}
}

TCP-Server:

import java.io.*;
import java.net.*;

public class Server  {
	public static void main(String argv[]) throws IOException {
		String clientSentence;
		String capitalizedSentence;
		ServerSocket welcomeSocket = new ServerSocket(6789);
		while(true){
			Socket connectionSocket = welcomeSocket.accept();
			BufferedReader inFromClient = new BufferedReader(
					new InputStreamReader(
							connectionSocket.getInputStream()));
			DataOutputStream outToClient = new DataOutputStream(
					connectionSocket.getOutputStream());
			clientSentence = inFromClient.readLine();
			capitalizedSentence = clientSentence.toUpperCase() + '\n';
			outToClient.writeBytes(capitalizedSentence);
		}
	}
}

先运行 Server 再运行 Client.