客户端服务器上的线程 [java]

Question

我正在尝试做多客户端服务器。我已经设置了多线程服务器。我的问题是如何一次加入（运行）例如 20 个客户？我还需要使用线程吗？我正在考虑与我的客户端创建构造函数来设置连接并获取随机名称，然后创建循环，通过其中的 20 个并设置它们？ 这是代码： //服务器

package com.multi;

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

    public static final int PORT = 4445;


    public void startServer(){
        try {
            ServerSocket server = new ServerSocket(PORT);
            System.out.println("Server is waiting for connetions...");

            while (true) {
                Socket socket = server.accept();
                new ServerThread(socket).start();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }



    public static void main(String[] args){
        new Server().startServer();
    }

}

//服务器多线程

package com.multi;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;

public class ServerThread extends Thread {
    Socket socket;
    String message = null;

    ServerThread(Socket socket) {
        this.socket = socket;
    }
    public void run(){
        try {
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            while ((message = bufferedReader.readLine()) != null){
                System.out.println("Client: " + message);
            }
            socket.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}

//客户

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextField;

public class Client extends JFrame{

    private String[] names = { "Sara", "Jessica", "Tom", "Emanuel", "Joshua",
            "Kristin", "Kirito", "Goku", "Bulma" };
    private JTextField chatWindow;

    public void clientJoin() {
        for (String name : names) {

            try {
                chatWindow = new JTextField();
                add(new JScrollPane(chatWindow));
                setSize(300, 150);
                setVisible(true);
                Socket socket = new Socket("localhost", 4445);
                PrintWriter printWriter = new PrintWriter(
                        socket.getOutputStream(), true);
                BufferedReader bufferedReader = new BufferedReader(
                        new InputStreamReader(System.in));
                System.out.println(name);
                while (true) {
                    String readerInput = bufferedReader.readLine();
                    printWriter.println(name + ": " + readerInput);
                    chatWindow.setText(name);
                }
            } catch (UnknownHostException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {

        for (int i = 0; i < 3; i++) {
            Runnable r = new Runnable() {
                @Override
                public void run() {
                    new Client().clientJoin();
                }
            };
            new Thread(r).start();            
        }

    }

}

Answer 1

这对我有用：

    import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextField;

public class Client extends JFrame{

    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private static String[] names = new String[]{ "Sara", "Jessica", "Tom", "Emanuel", "Joshua",
            "Kristin", "Kirito", "Goku", "Bulma" };
    private JTextField chatWindow;
    private static int c = 0;

    public void clientJoin(String name) {


            try {
                chatWindow = new JTextField();
                add(new JScrollPane(chatWindow));
                setSize(300, 150);
                setVisible(true);
                Socket socket = new Socket("localhost", 4444);
                PrintWriter printWriter = new PrintWriter(
                        socket.getOutputStream(), true);
                BufferedReader bufferedReader = new BufferedReader(
                        new InputStreamReader(System.in));
                System.out.println(name);

                System.out.println(name);
                while (true) {
                    String readerInput = bufferedReader.readLine();
                    printWriter.println(name + ": " + readerInput);
                    chatWindow.setText(name);
                }
            } catch (UnknownHostException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();

            }

    }

    public static void main(String[] args) {
        while (c < names.length-1) {
            Runnable r = new Runnable() {
                @Override
                public void run() {
                    new Client().clientJoin(names[c]);
                }
            };
            new Thread(r).start();
            System.out.println("ges here");
            c++;
        }

    }

}

Answer 2

如果你想测试并发访问，那么是的，你需要启动 20 个客户端线程。比如：

for (int i = 0; i < 20; i++) {
    Runnable r = new Runnable() {
        @Override
        public void run() {
            startAClient();
        }
    };
    new Thread(r).start();            
}