Java socket编程多人聊天室的代码
时间: 2024-01-01 18:05:00 浏览: 31
Java Socket编程可以用于实现多人聊天室。以下是一个简单的Java多人聊天室的代码示例:
Server端代码:
```java
import java.io.*;
import java.net.*;
import java.util.*;
public class Server {
ArrayList<PrintWriter> clientOutputStreams;
public class ClientHandler implements Runnable {
BufferedReader reader;
Socket socket;
public ClientHandler(Socket clientSocket) {
try {
socket = clientSocket; InputStreamReader isReader = new InputStreamReader(socket.getInputStream());
reader = new BufferedReader(isReader);
} catch (Exception ex) { ex.printStackTrace(); }
}
public void run() {
String message;
try {
while ((message = reader.readLine()) != null) {
System.out.println("read " + message);
tellEveryone(message);
}
} catch (Exception ex) { ex.printStackTrace(); }
}
}
public static void main (String[] args) {
new Server().go();
}
public void go() {
clientOutputStreams = new ArrayList<PrintWriter>();
try {
ServerSocket serverSock = new ServerSocket(5000);
while(true) {
Socket clientSocket = serverSock.accept();
PrintWriter writer = new PrintWriter(clientSocket.getOutputStream());
clientOutputStreams.add(writer);
Thread t = new Thread(new ClientHandler(clientSocket));
t.start();
System.out.println("got a connection");
}
} catch (Exception ex) { ex.printStackTrace(); }
}
public void tellEveryone(String message) {
Iterator<PrintWriter> it = clientOutputStreams.iterator();
while (it.hasNext()) {
try {
PrintWriter writer = (PrintWriter) it.next();
writer.println(message);
writer.flush();
} catch (Exception ex) { ex.printStackTrace(); }
}
}
}
```
Client端代码:
```java
import java.io.*;
import java.net.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Client {
JTextArea incoming;
JTextField outgoing;
BufferedReader reader;
PrintWriter writer;
Socket sock;
public static void main(String[] args) {
new Client().go();
}
public void go() {
JFrame frame = new JFrame("Ludicrously Simple Chat Client");
JPanel mainPanel = new JPanel();
incoming = new JTextArea(15,50);
incoming.setLineWrap(true);
incoming.setWrapStyleWord(true);
incoming.setEditable(false);
JScrollPane qScroller = new JScrollPane(incoming);
qScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
qScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
outgoing = new JTextField(20);
JButton sendButton = new JButton("Send");
sendButton.addActionListener(new SendButtonListener());
mainPanel.add(qScroller);
mainPanel.add(outgoing);
mainPanel.add(sendButton);
setUpNetworking();
Thread readerThread = new Thread(new IncomingReader());
readerThread.start();
frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
frame.setSize(400,500);
frame.setVisible(true);
}
private void setUpNetworking() {
try {
sock = new Socket("127.0.0.1", 5000);
InputStreamReader streamReader = new InputStreamReader(sock.getInputStream());
reader = new BufferedReader(streamReader);
writer = new PrintWriter(sock.getOutputStream());
System.out.println("networking established");
} catch (IOException ex) { ex.printStackTrace(); }
}
public class SendButtonListener implements ActionListener {
public void actionPerformed(ActionEvent ev) {
try {
writer.println(outgoing.getText());
writer.flush();
} catch (Exception ex) { ex.printStackTrace(); }
outgoing.setText("");
outgoing.requestFocus();
}
}
public class IncomingReader implements Runnable {
public void run() {
String message;
try {
while ((message = reader.readLine()) != null) {
System.out.println("client read " + message);
incoming.append(message + "\n");
}
} catch (Exception ex) { ex.printStackTrace(); }
}
}
}
```