java版两人聊天程序

server.java

import java.io.*;
import java.net.*;
import java.text.SimpleDateFormat;
import java.util.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;

@SuppressWarnings("serial")
public class Server extends JFrame {
    DataInputStream inputFromClient;
    DataOutputStream outputToClient;
    // Button for send massage
    private JButton jbSend = new JButton("Send");
    // Text area for displaying contents
    private JTextArea jta = new JTextArea();
    // Text field for receiving radius
    private JTextField jtf = new JTextField();
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Date d = new Date();
    String time = format.format(d);

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

    public Server() {
        // Place text area on the frame
        setLayout(new BorderLayout());
        add(new JScrollPane(jta), BorderLayout.CENTER);
        JPanel p = new JPanel();
        p.setLayout(new BorderLayout());
        p.add(new JLabel("Message"), BorderLayout.WEST);
        p.add(jtf, BorderLayout.CENTER);
        jtf.setHorizontalAlignment(JTextField.LEFT);
        p.add(jbSend, BorderLayout.EAST);
        add(p, BorderLayout.SOUTH);
        jtf.addActionListener(new ButtonListener()); // Register listener
        jbSend.addActionListener(new ButtonListener()); // Register listener
        setTitle("Server");
        setSize(500, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true); // It is necessary to show the frame here!

        try {
            // Create a server socket
            ServerSocket serverSocket = new ServerSocket(8001);
            jta.append(" ***Server started at  " + time +"***"+ '
');

            // Listen for a connection request
            Socket socket = serverSocket.accept();

            // Create data input and output streams
            inputFromClient = new DataInputStream(socket.getInputStream());
            outputToClient = new DataOutputStream(socket.getOutputStream());

            while (true) {
                // Receive message from the client
                String message = inputFromClient.readUTF();
                jta.append(" " + time + '
');
                jta.append(" Message: " + message + '
');
            }
        } catch (IOException ex) {
            jta.append(" ***端口已被占用!*** " + '
');
        }
    }

    public class ButtonListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            try {
                // Get the message from the text field
                String message = jtf.getText().trim();

                // Send the radius to the server
                outputToClient.writeUTF(message);
                outputToClient.flush();

                // Display to the text area
                jta.append(" " + time + '
');
                jta.append(" MyMessage: " + message + "
");
                jtf.setText(null);
            } catch (IOException ex) {
                System.err.println(ex);
            }
        }
    }

}

client.java

import java.io.*;
import java.net.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

@SuppressWarnings("serial")
public class Client extends JFrame {
    // Text field for receiving message
    private JTextField jtf = new JTextField();

    // Text area to display contents
    private JTextArea jta = new JTextArea();
    // Button for send massage
    private JButton jbSend = new JButton("Send");
    // IO streams
    private DataOutputStream toServer;
    private DataInputStream fromServer;
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Date d = new Date();
    String time = format.format(d);
    
    public static void main(String[] args) {
        new Client();
    }

    public Client() {
        // Panel p to hold the label and text field
        JPanel p = new JPanel();
        p.setLayout(new BorderLayout());
        p.add(new JLabel("Message"), BorderLayout.WEST);
        p.add(jtf, BorderLayout.CENTER);
        jtf.setHorizontalAlignment(JTextField.LEFT);
        p.add(jbSend, BorderLayout.EAST);
        setLayout(new BorderLayout());
        add(p, BorderLayout.SOUTH);
        add(new JScrollPane(jta), BorderLayout.CENTER);

        jtf.addActionListener(new ButtonListener()); // Register listener
        jbSend.addActionListener(new ButtonListener()); // Register listener

        setTitle("Client");
        setSize(500, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true); // It is necessary to show the frame here!

        try {
            // Create a socket to connect to the server
            Socket socket = new Socket("localhost", 8001);

            // Create an input stream to receive data from the server
            fromServer = new DataInputStream(socket.getInputStream());

            // Create an output stream to send data to the server
            toServer = new DataOutputStream(socket.getOutputStream());

            while (true) {
                // Get message from the server
                String message2 = fromServer.readUTF();
                jta.append(" " + time + '
');
                jta.append(" Message: " + message2 + '
');
            }
        } catch (IOException ex) {
            jta.append(" ***连接服务器失败!*** "+ '
');
        }
    }

    public class ButtonListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            try {
                // Get the message from the text field
                String message = jtf.getText().trim();

                // Send the message to the server
                toServer.writeUTF(message);
                toServer.flush();
                
                // Display to the text area
                jta.append(" " + time + '
');
                jta.append(" MyMessage: " + message + "
");
                jtf.setText(null);
            } catch (IOException ex) {
                System.err.println(ex);
            }
        }
    }
}

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