chatapplet.java.bak

java初学者

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

class Customer implements Serializable 
{ 
	String infoMessage = ""; 
	String sendMessage = ""; 
	String custName = ""; 
	String otherName = ""; 
	Vector nameList = new Vector(1, 1); 
	int custSign = 0; 
	static int membernumber = 0;
} 

public class ChatApplet extends JApplet implements ActionListener, MouseListener 
{ 
	newpanel loginPanel;//登陆面板，网格袋布局
	JPanel mainPanel; //主面板，卡片布局
	JPanel chatPanel; //聊天面板，边界布局

	JLabel labelLoginName; //登陆面板中的组件
	JLabel labelPassword;
	JTextField textLoginName;
	JPasswordField textPassword;
	JButton buttonLogin; 
	JButton buttonRewrite; 
	GridBagLayout gbObject; 
	GridBagConstraints gbc; 

	JPanel panel1; //聊天面板中的4个子面板
	JPanel panel2; 
	JPanel panel3; 
	JPanel panel4; 

	JLabel labelTitle; //聊天面板中的组件
	JLabel labelTo; 
	JLabel labelSaid; 
	JButton buttonSend; 
	JButton buttonExit; 

	JList listName; 
	DefaultListModel listModel; 
	JTextArea textMain; 
	JTextField textName; 
	JTextField textObject; 

	String name; 
	Socket clientSocket; 
	ObjectInputStream in; 
	ObjectOutputStream out; 

	public void init() 
	{ 
		mainPanel = new JPanel(); 
		loginPanel = new newpanel(); 
		//loginPanel.setBackground(new Color(80, 170, 200)); 
		chatPanel = new JPanel(); 
		chatPanel.setBackground(new Color(160, 220, 160)); 
		this.getContentPane().add(mainPanel); 

		mainPanel.setLayout(new CardLayout()); //设置主面板为卡片布局
		mainPanel.add("one", loginPanel); //将2个子面板加到主面板中
		mainPanel.add("two", chatPanel); 
		((CardLayout)mainPanel.getLayout()).show(mainPanel, "one"); //显示第一页登陆面板

		gbObject = new GridBagLayout(); //设置登陆面板为网格袋布局
		gbc = new GridBagConstraints(); 
		loginPanel.setLayout(gbObject); 

		labelLoginName = new JLabel("姓名："); 
		labelPassword = new JLabel("密码："); 
		textLoginName = new JTextField(15); 
		textPassword = new JPasswordField(15); 

		buttonLogin = new JButton("登陆"); 
		buttonLogin.setBackground(new Color(100, 160, 200)); 
		buttonLogin.addActionListener(new ActionListener() //对按钮添加动作监听并重载方法
		{ 
			int type = JOptionPane.PLAIN_MESSAGE; 
			String message = ""; 
			String title = "错误"; 

			public void actionPerformed(ActionEvent e) 
			{ 
				if (e.getSource() == buttonLogin) //当点击按钮时
				{ 
					if (textLoginName.getText().equals("")) //如果姓名为空
					{ 
						type = JOptionPane.ERROR_MESSAGE; 
						message = "登陆名字不能为空！"; 
						JOptionPane.showMessageDialog(loginPanel, message, title, type); //用弹出对话框提示
					} 
					else if (new String(textPassword.getPassword()).equals("")) //如果密码为空
					{ 
						type = JOptionPane.ERROR_MESSAGE; 
						message = "密码不能为空！"; 
						JOptionPane.showMessageDialog(loginPanel, message, title, type); 
					} 
					else 
					{ 
						name = textLoginName.getText(); //获得名字
						((CardLayout)mainPanel.getLayout()).show(mainPanel, "two"); //显示第二页，进入聊天面板

						try 
						{ 
							clientSocket = new Socket("127.0.0.1", 7000); 
							out = new ObjectOutputStream(clientSocket.getOutputStream()); 
							Customer cust = new Customer(); 
							cust.custName = name; 
							cust.custSign = 2; 
							out.writeObject((Customer)cust);//对象输出 
						} 
						catch (UnknownHostException ue) 
						{ 
							System.err.println("Unknown Host Name"); 
							System.exit(0); 
						} 
						catch (IOException evt) 
						{ 
							System.err.println("Cannot write to the server"); 
							System.exit(0); 
						} 

						Message message = new Message(); 
						message.start();//启动线程进行通信
					} 
				} 
			} 
		}); 

		buttonRewrite = new JButton("重写"); 
		buttonRewrite.setBackground(new Color(100, 160, 200)); 
		buttonRewrite.addActionListener(new ActionListener() //对按钮添加动作监听并重载方法
		{ 
			public void actionPerformed(ActionEvent e) 
			{ 
				if (e.getSource() == buttonRewrite) 
				{ 
					textLoginName.setText(""); 
					textPassword.setText(""); 
				} 
			} 
		}); 

		gbc.anchor = GridBagConstraints.NORTHWEST; //添加登陆面板中的各个组件
		gbc.gridx = 2; 
		gbc.gridy = 5; 
		gbObject.setConstraints(labelLoginName, gbc); 
		loginPanel.add(labelLoginName); 

		gbc.gridx = 4; 
		gbObject.setConstraints(textLoginName, gbc); 
		loginPanel.add(textLoginName); 

		gbc.gridx = 2; 
		gbc.gridy = 8; 
		gbObject.setConstraints(labelPassword, gbc); 
		loginPanel.add(labelPassword); 

		gbc.gridx = 4; 
		gbObject.setConstraints(textPassword, gbc); 
		loginPanel.add(textPassword); 

		gbc.gridx = 2; 
		gbc.gridy = 11; 
		gbObject.setConstraints(buttonLogin, gbc); 
		loginPanel.add(buttonLogin); 

		gbc.gridx = 4; 
		gbObject.setConstraints(buttonRewrite, gbc); 
		loginPanel.add(buttonRewrite); 
		
		Localtime localtime = new Localtime();
		localtime.start();//启动线程添加本机时间

		panel1 = new JPanel(); //聊天面板中的子面板
		panel1.setBackground(new Color(160, 220, 160)); 
		panel2 = new JPanel(); 
		panel2.setBackground(new Color(160, 220, 160)); 
		panel3 = new JPanel(); 
		panel3.setBackground(new Color(150, 180, 220)); 
		panel4 = new JPanel(); 
		panel4.setBackground(new Color(160, 220, 160)); 

		textMain = new JTextArea(20, 87); 
		textMain.setEditable(false); //设置不可编辑
		textMain.setLineWrap(true); //设置自动换行
		textMain.setFont(new Font("宋体", Font.PLAIN, 14)); //设置字体
		JScrollPane textChat = new JScrollPane(textMain); //将文本域加入到滚动面板中

		listModel = new DefaultListModel(); //来存储JList的显示数据
		listName = new JList(listModel); 
		listName.setFont(new Font("宋体", Font.PLAIN, 14)); //设置字体
		listName.setVisibleRowCount(22); //设置可见元素个数
		listName.setFixedCellWidth(160); //设置列表中每个元素的宽
		listName.setFixedCellHeight(25); //设置列表中每个元素的高
		JScrollPane list = new JScrollPane(listName); //将列表加入到滚动面板中
		panel4.add(list); //将列表添加到子面板4中
		listName.addMouseListener(this); //对列表栏进行鼠标监听

		textName =new JTextField(8); 
		textName.setEditable(false); //使文本栏不可编辑
		textName.setText("所有人"); //添加内容

		textObject = new JTextField(40); 
		textObject.addKeyListener(new KeyAdapter() //对文本栏进行键盘监听
		{ 
			public void keyPressed(KeyEvent e) //重载其中的一种方法
			{ 
				if (e.getKeyCode() == KeyEvent.VK_ENTER) 
				{ 
					buttonSend.doClick(); 
				} 
			} 
		}); 

		labelTitle = new JLabel("	"); 
		TitleText title = new TitleText();
		title.start();
		//labelTitle.setFont(new Font("华文行楷", Font.PLAIN, 30)); 

		labelTo = new JLabel("对"); 
		labelSaid = new JLabel("说："); 

		buttonSend = new JButton("发送"); 
		buttonSend.setBackground(new Color(160, 220, 160)); 
		buttonSend.addActionListener(this); //对按钮进行动作监听

		buttonExit = new JButton("退出聊天室"); 
		buttonExit.setBackground(new Color(160, 220, 160)); 
		buttonExit.addActionListener(this); //对按钮进行动作监听

		chatPanel.setLayout(new BorderLayout(5, 10)); //设置聊天面板为边界布局
		chatPanel.add(panel1, BorderLayout.SOUTH); //将子面板1添加到聊天面板的南面
		panel1.setLayout(new FlowLayout(FlowLayout.LEFT)); //设置子面板1为流布局，并左对齐
		panel1.add(labelTo); //添加组件
		panel1.add(textName); 
		panel1.add(labelSaid); 
		panel1.add(textObject); 
		panel1.add(buttonSend); 
		panel1.add(buttonExit); 

		chatPanel.add(panel3, BorderLayout.NORTH); //将子面板3添加到聊天面板的北面
		panel3.setLayout(new FlowLayout()); //设置子面板3为流布局
		panel3.add(labelTitle); 

		chatPanel.add(panel2, BorderLayout.CENTER); //将子面板2添加到聊天面板的中间
		panel2.setLayout(new BorderLayout(10, 15));  //设置子面板2设置为边界布局
		panel2.add("East", textChat); //将聊天栏放在东面
		panel2.add("Center", panel4); //将子面板4放在中间
	} 

	public void mouseEntered(MouseEvent e){} //重载鼠标监听的所有方法
	public void mouseExited(MouseEvent e){} 
	public void mousePressed(MouseEvent e){} 
	public void mouseReleased(MouseEvent e){} 

	public void mouseClicked(MouseEvent e) 
	{ 
		String temp; 
		int index; 

		if (e.getSource() == listName) //获得事件源为列表时
		{ 
			if (e.getClickCount() == 2) //当鼠标双击时
			{ 
				index = listName.locationToIndex(e.getPoint()); //将鼠标所在点的坐标转换成列表中的下标
				temp = (String)listModel.getElementAt(index); //获得列表中的内容
				textName.setText(temp); 
			} 
		} 
	} 

	public void actionPerformed(ActionEvent e) //动作监听，重载方法
	{ 
		Customer cust1 = new Customer(); 

		if (e.getSource() == buttonSend) 
		{ 
			try 
			{ 
				cust1.otherName = textName.getText(); 
				cust1.custSign = 1; 
				cust1.custName = name; 
				cust1.sendMessage = textObject.getText(); 
				if (textObject.getText().equals(""))
				{
					textMain.append("Sorry，不能发送空信息！！\n");
					textMain.setCaretPosition(textMain.getDocument().getLength());
					return;
				}
				if (textName.getText().equals(name))
				{
					textMain.append("Sorry，公共场合请勿自言自语！！\n");
					textMain.setCaretPosition(textMain.getDocument().getLength());
					textObject.setText("");
					return;
				}
				out.writeObject((Customer)cust1); //写出对象
				textObject.setText(""); 
			} 
			catch(Exception e1) 
			{} 
		} 

		if (e.getSource() == buttonExit) 
		{ 
			int type = JOptionPane.PLAIN_MESSAGE; 
			String message = ""; 
			String title = "退出"; 

			try 
			{ 
				cust1.custSign = 3; 
				cust1.custName = name; 
				out.writeObject((Customer)cust1); 
				clientSocket.close(); 
				type = JOptionPane.INFORMATION_MESSAGE; 
				message = "您已退出聊天室，欢迎再次光临"; 
				JOptionPane.showMessageDialog(loginPanel, message, title, type); //用对话框的形式输出
				System.exit(0); 
			} 
			catch(Exception evt) 
			{} 
		} 
	} 

	class Message extends Thread 
	{ 
		public void run() 
		{
			while (true) 
			{ 
				try 
				{ 
					String name; 
					String message; 
					in = new ObjectInputStream(clientSocket.getInputStream()); 
					Customer temp = (Customer)in.readObject(); //读入对象
					
					if (temp.custSign == 1) 
					{
						Date d=new Date();
						GregorianCalendar c=new GregorianCalendar();
						c.setTime(d);
						name = temp.custName; 
						message = temp.sendMessage; 
						textMain.append(c.get(Calendar.HOUR_OF_DAY)+":"+c.get(Calendar.MINUTE)+":"+c.get(Calendar.SECOND)+" <" + name + ">" + "对" + "<" + temp.otherName + "> " + "说：" + message + "\n"); 
						textMain.setCaretPosition(textMain.getDocument().getLength());//出现在文本域的最下方
					} 

					if (temp.custSign == 2 || temp.custSign == 3) 
					{ 
						listModel.clear(); //清空列表
						listModel.addElement("所有人"); //加入一个元素
						
						String onlineName;
						for (int i = 0; i < temp.nameList.size(); i++ )//将所有的元素加入
						{ 
							onlineName = (String) temp.nameList.elementAt(i);
							listModel.addElement(onlineName); 
							//System.out.println(onlineName); 
						} 

						textMain.append(temp.infoMessage + "\n"); 
						textMain.setCaretPosition(textMain.getDocument().getLength());
					} 

					if (temp.custSign == 4) 
					{ 
						textMain.append(temp.sendMessage + "\n"); 
						textMain.setCaretPosition(textMain.getDocument().getLength()); 
					} 
				} 
				catch(Exception e) 
				{} 
			} 
		} 
	}

	public void paint(Graphics g)
					{
						g.drawString(temp.membernumber+"zai",20,20);
					}

		
	class Localtime extends Thread
	{
		Date date;
		GregorianCalendar calendar;
		String strdate,strtime,strstatus;
		public void run()
		{
			while (true)
			{
				display();
				try
				{
					this.sleep(1000);
				}
				catch(InterruptedException e)
				{
					getAppletContext().showStatus("Thread interrupted");
				}
			}
		}
		public void display()
		{
			date=new Date();
			calendar=new GregorianCalendar();
			calendar.setTime(date);
			strtime=calendar.get(Calendar.HOUR_OF_DAY)+":"+calendar.get(Calendar.MINUTE)+":"+calendar.get(Calendar.SECOND);
			strdate=(calendar.get(Calendar.MONTH)+1)+"/"+calendar.get(Calendar.DATE)+"/"+calendar.get(Calendar.YEAR);
			strstatus=strtime+"  "+strdate;
			showStatus(strstatus);
		}
	}

	class TitleText extends Thread
	{
		String Info[]={"欢迎光临聊天室","让我们畅所欲言吧"};
		int counter=0;
		public void run()
		{
			while (true)
			{
				display();
				try
				{
					this.sleep(1500);
				}
				catch(InterruptedException e)
				{
					getAppletContext().showStatus("Thread interrupted");
				}
			}
		}
		public void display()
		{
			labelTitle.setFont(new Font("华文行楷", Font.PLAIN, 30));
	        labelTitle.setText(Info[counter]);
		    counter++;
	        if(counter>=2)
		    counter=0;
		}
	}

	public void destroy() 
	{ 
		try 
		{
			Customer cust1 = new Customer(); 
			cust1.custSign = 3; 
			cust1.custName = name; 
			out.writeObject((Customer)cust1);  
			clientSocket.close(); 
		} 
		catch(Exception e) 
		{} 
	} 
}
class newpanel extends JPanel
{
	public newpanel(){}
	public void paintComponent(Graphics g)
	{
		int x=0,y=0;
		ImageIcon icon=new ImageIcon("01.jpg");
		g.drawImage(icon.getImage(),x,y,getSize().width,getSize().height,this);
	}
}