java聊天程序（二）

原创于 2013-08-15 16:58:20 发布 · 495 阅读

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CC 4.0 BY-SA版权

本文介绍了一个简单的Java网络编程示例，包括客户端与服务器端的文本传输功能。客户端通过Socket连接到本地服务器，并发送文本消息，服务器接收并打印这些消息。

版本0.2，实现功能：实现客户端与服务器端的文本传输

客户端：

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;

public class Client {

    public static void main(String[] args) {
    new Client().launchFrame();
    }

    void launchFrame() {
    new MyFrame("chat");
    }

}

class MyFrame extends Frame {

    private TextField tf;
    private TextArea ta;
    String sf;
    Socket sk = null;
    OutputStream os = null;
    DataOutputStream dos = null;

    MyFrame(String si) {
    super(si);
    this.setBounds(300, 300, 400, 300);
    tf = new TextField();
    ta = new TextArea();
    this.add(tf, BorderLayout.SOUTH);
    this.add(ta, BorderLayout.NORTH);
    try {
        sk = new Socket("127.0.0.1", 6666);
        os = sk.getOutputStream();
        dos = new DataOutputStream(os);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    this.addWindowListener(new MyWindowListner());
    tf.addActionListener(new MyActionListener());
    pack();
    setVisible(true);
    }

    class MyWindowListner extends WindowAdapter {
    public void windowClosing(WindowEvent e) {
        setVisible(false);
        try {
        dos.writeUTF("close");
        dos.close();
        sk.close();
        } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
        }
        System.exit(0);
    }
    }

    class MyActionListener implements ActionListener {

    public void actionPerformed(ActionEvent e) {
        sf = tf.getText();
        ta.append(sf + "\n");
        tf.setText("");

        try {
        dos.writeUTF(sf);
        dos.flush();
        } catch (UnknownHostException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
        } catch (IOException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
        }

    }

    }

}

服务器端：

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

public class Server {

    public static void main(String[] args) {
    String str = null;
    boolean started = false;
    ServerSocket ss;
    try {
        started = true;
        ss = new ServerSocket(6666);
        while (started) {
        boolean bConnected = false;
        Socket s = ss.accept();
        System.out.println("a client has been connected!");
        bConnected = true;
        while (bConnected) {
            InputStream is = s.getInputStream();
            DataInputStream dis = new DataInputStream(is);
            str = dis.readUTF();
            System.out.println(str);
        }
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    }

}