java实现简单聊天软件

public class SendThread {

 ChatWindow chatWindow;
 private String remoteIP = "";
 private int port = 0;
 private String message = "";

 public SendThread(int port,ChatWindow window) {
  chatWindow = window;
 }

 public void notRun() {
  InetSocketAddress isa = new InetSocketAddress(remoteIP, port);
  try {
   Socket socket = new Socket();
   socket.connect(isa);
   OutputStreamWriter writer = new OutputStreamWriter(socket.getOutputStream());
   writer.write(message);
   writer.flush();
   writer.close();
   System.out.println("将数据写入到流中");
  } catch (IOException e) {
   e.printStackTrace();
  }finally{
   message = "";
  }
 }

 public void senMessage(String host,int port,String message){
  remoteIP = host;
  this.port = port;
  this.message = message;
  notRun();
 }

}

public class ReceiveThread extends Thread {

 private ServerSocket server;
 private ChatWindow window;

 public ReceiveThread(ChatWindow window) {
  this.window = window;
  try {
   server = new ServerSocket(0);
   window.setLocalPort(server.getLocalPort());
   start();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   window.printError("连接出错");
  }
 }

 @Override
 public void run() {
  // TODO Auto-generated method stub
  while(true){
   Socket socket;
   try {
    socket = server.accept();
    InputStreamReader reader = new InputStreamReader(socket.getInputStream());
    int c;
    StringBuilder sb = new StringBuilder();
    while((c = reader.read()) != -1){
     sb.append((char)c);
    }
    window.setReceive(sb.toString());
   } catch (IOException e) {
    // TODO Auto-generated catch block
    System.out.println("线程将接受到的数据写入对话框出错");
   }
  }
 }
}

public class ChatWindow extends JFrame {

 private JButton sendButton;
 private JButton cancelButton;
 private JButton receiveButton;
 private JTextArea receiveText;
 private JTextField sendText;

 private JLabel localPort;

 private JTextField remoteAddress;
 private JTextField remotePort;
 private SendThread sendThread;
 private ReceiveThread receiveThread;

 private void GUIini(){
  Container c = this.getContentPane();
  c.setLayout(new BorderLayout());
  setSize(400, 500);

  //第一个panel
  JPanel panel1 = new JPanel(new GridLayout(4, 2));
//  JPanel panel1 = new JPanel(new (4, 2));
  panel1.setSize(400, 75);
  panel1.add(new JLabel("当前机器的IP地址是:"));
  try {
   panel1.add(new JLabel(InetAddress.getLocalHost().getHostAddress()));
  } catch (UnknownHostException e) {
   // TODO Auto-generated catch block
   panel1.add(new JLabel("当前机器的IP地址是:" + "Unknown"));
  }
  panel1.add(new JLabel("当前对话的端口是:"));
  panel1.add(localPort = new JLabel(""+0));
  panel1.add(new JLabel("Remote Host IP Address:"));
  remoteAddress = new JTextField();
  remoteAddress.setColumns(0);
  panel1.add(remoteAddress);
  panel1.add(new JLabel("Remote Host Port:"));
  remotePort = new JTextField();
  remotePort.setColumns(0);
  panel1.add(remotePort);
  c.add(panel1,BorderLayout.NORTH);


  //第二个panel
  JPanel panel2 = new JPanel(new FlowLayout(FlowLayout.LEADING));
  panel2.setSize(400,200);
  panel2.add(new JLabel("收到的内容"));
  receiveText = new JTextArea(15,30);
  receiveText.setEditable(false);
  receiveText.setAutoscrolls(true);
  JScrollPane jsp = new JScrollPane(receiveText);
  panel2.add(jsp);
  //第三个panel
//  JPanel panel3 = new JPanel(new GridLayout(2, 1));
  panel2.add(new JLabel("请输入发送的内容"));
  sendText = new JTextField(30);
  sendText.setAutoscrolls(true);
  panel2.add(sendText);
  c.add(panel2,BorderLayout.CENTER);
  //c.add(panel3);
  //第四个panel
  JPanel panel4 = new JPanel(new GridLayout(1, 0));
  panel4.setSize(400,20);
  receiveButton = new JButton("开始接受数据");
  sendButton = new JButton("发送");
  cancelButton = new JButton("取消");
  panel4.add(receiveButton);
  panel4.add(cancelButton);
  panel4.add(sendButton);
  c.add(panel4,BorderLayout.SOUTH);
  //四个面板内容设置完毕

  setVisible(true);
  setResizable(false);
  setDefaultCloseOperation(EXIT_ON_CLOSE);
 }

 private void ActionIni() {

  //键盘动作
  this.addKeyListener(new KeyListener() {

   @Override
   public void keyTyped(KeyEvent e) {

   }

   @Override
   public void keyReleased(KeyEvent e) {
    // TODO Auto-generated method stub
    if(e.getKeyCode() == KeyEvent.VK_ENTER){
     //发送文本
     sendThread.senMessage(remoteAddress.getText(), Integer.parseInt(remotePort.getText()), sendText.getText());
     receiveText.setText(receiveText.getText() + "\n" + "发送:" + sendText.getText());
    }
   }

   @Override
   public void keyPressed(KeyEvent e) {
    // TODO Auto-generated method stub

   }
  });
  //取消按钮的动作
  cancelButton.addMouseListener(new MouseListener() {

   @Override
   public void mouseReleased(MouseEvent e) {
    // TODO Auto-generated method stub
    sendText.setText("");
   }

   @Override
   public void mousePressed(MouseEvent e) {
    // TODO Auto-generated method stub

   }

   @Override
   public void mouseExited(MouseEvent e) {
    // TODO Auto-generated method stub

   }

   @Override
   public void mouseEntered(MouseEvent e) {
    // TODO Auto-generated method stub

   }

   @Override
   public void mouseClicked(MouseEvent e) {
    // TODO Auto-generated method stub

   }
  });
  sendButton.addMouseListener(new MouseListener() {

   @Override
   public void mouseReleased(MouseEvent e) {
    //发送文本
    sendThread.senMessage(remoteAddress.getText(), Integer.parseInt(remotePort.getText()), sendText.getText());
    receiveText.setText(receiveText.getText() + "发送:" + sendText.getText()+ "\n");
   }

   @Override
   public void mousePressed(MouseEvent e) {
    // TODO Auto-generated method stub

   }

   @Override
   public void mouseExited(MouseEvent e) {
    // TODO Auto-generated method stub

   }

   @Override
   public void mouseEntered(MouseEvent e) {
    // TODO Auto-generated method stub

   }

   @Override
   public void mouseClicked(MouseEvent e) {
    // TODO Auto-generated method stub

   }
  });
 }

 private void ThreadIni() {
  // TODO Auto-generated method stub
  sendThread = new SendThread(0, this);
  receiveThread = new ReceiveThread(this);
 }
 //构造函数
 public ChatWindow() {
  GUIini();
  ActionIni();
  ThreadIni();
 }

 public void printError(String err){
  System.out.println("Error occur:" + err);
 }

 //回调函数,用于接受从线程中返回的数据
 public void setReceive(String receive){
  receiveText.setText(receiveText.getText() + "收到:" + receive+ "\n" );
 }

 //当接受数据的线程开始工作以后，就调用该回调函数，设置当前聊天窗口使用的端口是哪个
 public void setLocalPort(int localPortText){
  localPort.setText(""+localPortText);
 }

 //放远，这个是整个程序的起点
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  new ChatWindow();
 }

}