java - Java Sockets - 读取服务器获取的数据的客户端

Question

我正在开发一个 java 套接字程序，并且与客户端部分存在争议。服务器获取所有客户端写入的内容，但客户端仅获取其写入的内容。有人可以为我提供一个程序的客户端部分的示例，该程序可以获取所有客户端编写的内容吗？谢谢！

Answer 1

这是一个“回声服务器”示例

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

class TCPServer
{
public static void main(String argv[]) throws IOException
{
    ServerSocket serverSocket = null;
    DataInputStream serverInput = null;
    PrintStream serverOutput = null;
    String line = null;
    Socket clientSocket = null;

    // create server socket
    try
    {
        serverSocket = new ServerSocket(2012);
        clientSocket = serverSocket.accept();
        serverInput = new DataInputStream(clientSocket.getInputStream());
        serverOutput = new PrintStream(clientSocket.getOutputStream());
    }
    catch(IOException e){System.out.println(e);}


    // receive data and send it back to the client
    try
    {
        while(true)
        {
            line = serverInput.readLine();
            if(line.equals("exit"))
            {
                break;
            }
            else
            {
                if(!line.equals(null) && !line.equals("exit"))
                {
                    System.out.println("Received " +line);
                    line = line+" MODIFIED";
                    serverOutput.println(line);
                }
            }
        }
    }
    catch(IOException e){System.out.println("SERVER SIDE: Unable send/receive data");}

    try
    {
        serverInput.close();
        serverOutput.close();
        clientSocket.close();
        serverSocket.close();
    }
    catch(IOException e){System.out.println(e);}
}
}

这里是客户端

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

public class TCPClient
{
public static void main(String[] args) throws IOException 
{

    Socket echoSocket = null;
    PrintWriter out = null;
    BufferedReader in = null;

    try {
        echoSocket = new Socket("localhost", 2012);
        out = new PrintWriter(echoSocket.getOutputStream(), true);
        in = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
    } catch (UnknownHostException e) {
        System.err.println("Don't know about host");
        System.exit(1);
    } catch (IOException e) {
        System.err.println("Couldn't get I/O");
        System.exit(1);
    }

BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
String userInput;

while ((userInput = stdIn.readLine()) != null) {
    out.println(userInput);
    System.out.println("echo: " + in.readLine());
    if(userInput.equals("exit"))
    break;
}

out.close();
in.close();
stdIn.close();
echoSocket.close();
}
}