java - 在同一连接中向 TCP 服务器发送多条消息

Question

我用 Java 创建了一个 TCP 服务器，用 Ruby 创建了一个 TCP 客户端。问题是我无法在同一连接中发送多条消息，仅发送了第一条消息而未发送另一条消息。

这是Java代码

package com.roun512.tcpserver;

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

public class Program {


    /**
     * @param args
     */
    public static void main(String[] args) throws Exception {

        String clientSentence;
        String capitalizedSentence;
        ServerSocket Socket = new ServerSocket(6789);

        while(true)
        {
            Socket connection = Socket.accept();
            BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            DataOutputStream outToClient = new DataOutputStream(connection.getOutputStream());
            clientSentence = inFromClient.readLine();
            System.out.println(clientSentence);
            capitalizedSentence = clientSentence + '\n';
            outToClient.writeBytes(capitalizedSentence);
            System.out.println("Sent msg");
        }
    }
}

这是客户端代码

客户端.rb

require 'socket'
class Client

        def initialize()
                server = TCPSocket.open("127.0.0.1", 6789)
                if server.nil?
                        puts "error"
                else
                        puts "connected"
                end
                server.puts("Hello\r\n")
                sleep 2
                server.puts("There\r\n")
                server.close
        end
end
Client.new()

我只收到Hello。我尝试了很多其他方法，但都没有用。

所以我的问题是如何在单个连接中发送多条消息，任何帮助将不胜感激:)

提前致谢!

Answer 1

Socket.accept() 在读取第一行后等待新的连接。尝试以下操作:

public static void main(String[] args) throws Exception {

    String clientSentence;
    String capitalizedSentence;
    ServerSocket Socket = new ServerSocket(6789);

    while (true)
    {
        Socket connection = Socket.accept();
        while(true)
        {
            BufferedReader inFromClient = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            DataOutputStream outToClient = new DataOutputStream(connection.getOutputStream());
            clientSentence = inFromClient.readLine();
            System.out.println(clientSentence);
            capitalizedSentence = clientSentence + '\n';
            outToClient.writeBytes(capitalizedSentence);
            System.out.println("Sent msg");
        } 
    }
}

如果有效，请将 while (true) 更改为一些有意义的条件，并且不要忘记在工作完成后关闭连接。