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Server

package org.zbq.server;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

import org.zbq.util.CharUtil;
import org.zbq.util.XMLUtil;

public class Server {
	private JFrame frame;
	private JLabel lab_serverState;
	private JLabel lab_state;
	private JLabel lab_port;
	private JTextField field_port;
	private JTextArea area;
	private JButton but_startServer;

	private Map<String, ServerMessageThread> map = new HashMap<String, ServerMessageThread>();


	public JTextArea getArea() {
		return area;
	}

	public void setArea(JTextArea area) {
		this.area = area;
	}
	
	public JButton getBut_startServer() {
		return but_startServer;
	}

	public void setBut_startServer(JButton but_startServer) {
		this.but_startServer = but_startServer;
	}

	public JLabel getLab_state() {
		return lab_state;
	}

	public void setLab_state(JLabel lab_state) {
		this.lab_state = lab_state;
	}

	public Map<String, ServerMessageThread> getMap() {
		return map;
	}

	public void setMap(Map<String, ServerMessageThread> map) {
		this.map = map;
	}

	public JTextField getField_port() {
		return field_port;
	}

	public void setField_port(JTextField field_port) {
		this.field_port = field_port;
	}

	public Server() {
		frame = new JFrame("Server");
		area = new JTextArea(22, 33);
		lab_serverState = new JLabel("Server State:");
		lab_state = new JLabel("Stop");
		lab_port = new JLabel("Port:");
		but_startServer = new JButton("Start");
		field_port = new JTextField(15);

		area.setEditable(false);
		lab_state.setForeground(Color.red);
		int x = (int) (Toolkit.getDefaultToolkit().getScreenSize().width * 0.4);
		int y = (int) (Toolkit.getDefaultToolkit().getScreenSize().height * 0.2);

		addListener();

		frame.setBounds(x, y, 400, 560);
		frame.add(getTopContainer(), BorderLayout.NORTH);
		frame.add(getCenterContainer(), BorderLayout.CENTER);
		frame.setVisible(true);
		frame.setResizable(false);
	}

	private Container getTopContainer() {
		JPanel pan = new JPanel(new GridLayout(2, 1));
		JPanel pan1 = new JPanel(new FlowLayout(FlowLayout.CENTER, 25, 1));
		JPanel pan2 = new JPanel(new FlowLayout(FlowLayout.CENTER, 15, 1));

		pan1.add(lab_serverState);
		pan1.add(lab_state);

		pan2.add(lab_port);
		pan2.add(field_port);
		pan2.add(but_startServer);

		pan.add(pan1);
		pan.add(pan2);

		pan.setBorder(BorderFactory.createTitledBorder("Server Information"));
		return pan;
	}

	private Container getCenterContainer() {
		JPanel pan = new JPanel();
		pan.add(new JScrollPane(area));
		pan.setBorder(BorderFactory.createTitledBorder("Online User List"));
		return pan;
	}

	private void addListener() {

		/* start button add listener */
		but_startServer.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				execute(e);
			}
		});
		
		/* Close the window add listener */
		frame.addWindowListener(new WindowAdapter() {

			@Override
			public void windowClosing(WindowEvent e) {
				try {
					Collection<ServerMessageThread> cols = map.values();

					String messageXML = XMLUtil.constructCloseServerWindowXML();

					for (ServerMessageThread smt : cols) {
						smt.sendMessage(messageXML);
					}
				} catch (Exception ex) {
					ex.printStackTrace();
				} finally {
					System.exit(0);
				}
			}

		});

	}

	private boolean execute(ActionEvent e) {
		
		String hostPort = field_port.getText();
		if (CharUtil.isEmpty(hostPort)) {
			JOptionPane.showMessageDialog(frame,
					"The port number can't for empty! ");
			field_port.requestFocus();
			return false;
		}

		if (!CharUtil.isNumber(hostPort)) {
			JOptionPane.showMessageDialog(frame, "Port must is a number!",
					"Error", JOptionPane.YES_OPTION);
			field_port.requestFocus();
			return false;
		}

		if (!CharUtil.isPortCorrect(hostPort)) {
			JOptionPane.showMessageDialog(frame, "Port must 1024-65535",
					"Error", JOptionPane.YES_OPTION);
			field_port.requestFocus();
			return false;
		}
		
		try{
			int port = Integer.parseInt(hostPort);
			new ServerConnection(this, port).start();
		}catch (Exception ex) {
			ex.printStackTrace();
			return false;
		}
		
		return true;
	}


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

}

ServerConnectThread
package org.zbq.server;

import java.awt.Color;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

import javax.swing.JOptionPane;

import org.zbq.util.XMLUtil;

public class ServerConnection extends Thread {
	private Server server;
	
	private ServerSocket serverSocket;
	
	public ServerConnection(Server server, int port) {
		this.server = server;
		
		try {
			this.serverSocket = new ServerSocket(port);
			this.server.getLab_state().setText("Running");
			this.server.getLab_state().setForeground(Color.GREEN);
			this.server.getBut_startServer().setEnabled(false);
			this.server.getField_port().setEditable(false);
		} catch (IOException e) {
			e.printStackTrace();
			JOptionPane.showMessageDialog(null, "The port number occupied", "ERROR", JOptionPane.ERROR_MESSAGE);
		}
		
	}
	
	@Override
	public void run() {
		while(true){
			try {
				Socket socket = this.serverSocket.accept();
				InputStream input = socket.getInputStream();
				OutputStream output = socket.getOutputStream();
				
				byte[] buf = new byte[5000];
				int len = input.read(buf);
				
				String loginXML = new String(buf, 0, len);
				
				String userName = XMLUtil.extractUsername(loginXML);
				
				boolean isLogin = false;
				
				String loginResult = null;
				
				/*judge userName is repeated*/
				if(this.server.getMap().containsKey(userName)){
					loginResult = "failure";
				}else{
					loginResult = "success";
					isLogin = true;
				}
				
				String xml = XMLUtil.constructLoginResultXML(loginResult);
				
				output.write(xml.getBytes());
				
				
				/*client login success*/
				if(isLogin){
					
					ServerMessageThread serverMessageThread = new ServerMessageThread(this.server, socket);
					
					/*put username and  message thread to map*/
					this.server.getMap().put(userName, serverMessageThread);
					
					/*update the user list*/
					serverMessageThread.updateUserList();
					
					serverMessageThread.start();
				}
				
				
			} catch (IOException e) {
				e.printStackTrace();
			}
			
					
		}
	}
}

ServerMessageThread

package org.zbq.server;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.Calendar;
import java.util.Collection;
import java.util.Map;
import java.util.Set;

import org.zbq.util.CharUtil;
import org.zbq.util.XMLUtil;

public class ServerMessageThread extends Thread {
	private Server server;

	private InputStream input;

	private OutputStream output;

	public ServerMessageThread(Server server, Socket socket) {
		this.server = server;
		try {
			this.input = socket.getInputStream();

			this.output = socket.getOutputStream();

		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 
	 * send messageXML to client
	 */
	public void sendMessage(String messageXML) {
		try {
			output.write(messageXML.getBytes());
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * update the server user list send to all clients new user list
	 */
	public void updateUserList() {
		/* get users set */
		Set<String> users = this.server.getMap().keySet();

		String xml = XMLUtil.constructUserList(users);

		StringBuffer buff = new StringBuffer();

		for (String user : users) {
			buff.append(user + "\n");
		}

		/* update server user list */
		this.server.getArea().setText(buff.toString());

		Collection<ServerMessageThread> cols = this.server.getMap().values();

		/* send new user list to all clients */
		for (ServerMessageThread smt : cols) {
			smt.sendMessage(xml);
		}

	}

	@Override
	public void run() {
		while(true){
			byte[] buf = new byte[5000];
			try {
				int len = this.input.read(buf);
				
				String xml = new String(buf, 0, len);
				
				int type = Integer.parseInt(XMLUtil.extractType(xml));
				
//				File file = new File("./content.txt");
//				if(!file.exists()){
//					file.createNewFile();
//				}
//				FileOutputStream out = new FileOutputStream(file, true);
//				out.write(xml.getBytes());
//				out.close();
				
				if(CharUtil.CLIENT_MESSAGE == type){
					/*get user name*/
					String userName = XMLUtil.extractUsername(xml);
					/*get content*/
					String content = XMLUtil.extractContent(xml);
					
					String message = userName + "  " 
							+ Calendar.getInstance().get(Calendar.HOUR_OF_DAY) + ":"
							+ Calendar.getInstance().get(Calendar.MINUTE) + ":"
							+ Calendar.getInstance().get(Calendar.SECOND) + "\n  "
							+ content;
					
					String messageXML = XMLUtil.constructServerMessageXML(message);
					
					Map<String, ServerMessageThread> map = this.server.getMap();
					
					Collection<ServerMessageThread> cols = map.values();
					
					/*send all clients chat message*/
					for(ServerMessageThread smt : cols){
						smt.sendMessage(messageXML);
					}
				
					/*when client close the window*/
				}else if(CharUtil.CLOSE_CLIENT_WINDOW == type){
					String userName = XMLUtil.extractUsername(xml);
					
					ServerMessageThread smt = this.server.getMap().get(userName);
					
					String confirmationXML = XMLUtil.constructCloseClientWindowConfirmationXML();
					
					smt.sendMessage(confirmationXML);
					
					this.server.getMap().remove(userName);
					
					this.updateUserList();
					
					this.input.close();
					this.output.close();
					/*over this thread*/
					break;
				}
				
			} catch (IOException e) {
				e.printStackTrace();
			}
			
		}
	}
}


Client

ClientLogin

package org.zbq.client;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.TitledBorder;

import org.zbq.util.CharUtil;

public class ClientLogin {

	private JFrame frame;
	private JLabel lab_userName;
	private JLabel lab_serverAddress;
	private JLabel lab_port;
	private JTextField field_userName;
	private JTextField field_serverAddress;
	private JTextField field_port;
	
	private JButton but_login;
	private JButton but_reset;
	
	public ClientLogin(){
		this.frame = new JFrame("Chart room Login");
		this.lab_userName = new JLabel("User Name:");
		this.lab_serverAddress = new JLabel("Server Address:");
		this.lab_port = new JLabel("Port:");
		this.field_userName = new JTextField(15);
		this.field_serverAddress = new JTextField(15);
		this.field_port = new JTextField(15);
		
		this.but_login = new JButton("Login");
		this.but_reset = new JButton("Reset");
		
		
		Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
		int x = (int) (dimension.getWidth()*0.4);
		int y = (int) (dimension.getHeight()*0.3);
		
		
		this.frame.setBounds(x, y, 320, 245);
		this.frame.setResizable(false);
		
		frame.add(getCenterContainer(), BorderLayout.CENTER);
		frame.add(getBottonContainer(), BorderLayout.SOUTH);
		addListener();
		this.frame.setVisible(true);
		this.frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	
	/**/
	private Container getCenterContainer(){
		JPanel pan = new JPanel(new FlowLayout(FlowLayout.CENTER, 10, 15));
		lab_userName.setPreferredSize(new Dimension(100, 25));
		field_userName.setPreferredSize(new Dimension(80, 25));
		lab_serverAddress.setPreferredSize(new Dimension(100, 25));
		field_serverAddress.setPreferredSize(new Dimension(80, 25));
		lab_port.setPreferredSize(new Dimension(100, 25));
		field_port.setPreferredSize(new Dimension(80, 25));

		
		pan.add(lab_userName);
		pan.add(field_userName);
		pan.add(lab_serverAddress);
		pan.add(field_serverAddress);
		pan.add(lab_port);
		pan.add(field_port);
		
		pan.setBorder(BorderFactory.createTitledBorder(new TitledBorder("User Login")));
		
		return pan;
	}
	
	private Container getBottonContainer(){
		JPanel pan = new JPanel();
		but_login.setPreferredSize(new Dimension(100, 30));
		but_reset.setPreferredSize(new Dimension(100, 30));
		
		pan.add(but_login);
		pan.add(but_reset);
		return pan;
	}
	
	public JFrame getFrame() {
		return frame;
	}

	public void setFrame(JFrame frame) {
		this.frame = frame;
	}

	private void addListener(){
		but_reset.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				field_userName.setText("");
				field_serverAddress.setText("");
				field_port.setText("");
			}
		});
		
		but_login.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				login(e);
			}
		});
	}
	
	private void login(ActionEvent e){
		String userName = field_userName.getText();
		String portStr = field_port.getText();
		String serverAddr = field_serverAddress.getText();
		
		if(CharUtil.isEmpty(userName)){
			JOptionPane.showMessageDialog(frame, "User name can't for empty!", "Error", JOptionPane.YES_OPTION);
			field_userName.requestFocus();
			return;
		}
		
		if(CharUtil.isEmpty(portStr)){
			JOptionPane.showMessageDialog(frame, "Port can't for empty!", "Error", JOptionPane.YES_OPTION);
			field_port.requestFocus();
			return;
		}
		
		if(CharUtil.isEmpty(serverAddr)){
			JOptionPane.showMessageDialog(frame, "Server Address can't for empty!", "Error", JOptionPane.YES_OPTION);
			field_serverAddress.requestFocus();
			return;
		}
		
		if(!CharUtil.isNumber(portStr)){
			JOptionPane.showMessageDialog(frame, "Port must is a number!", "Error", JOptionPane.YES_OPTION);
			field_port.requestFocus();
			return;
		}
		
		if(!CharUtil.isPortCorrect(portStr)){
			JOptionPane.showMessageDialog(frame, "Port must 1024-65535!", "Error", JOptionPane.YES_OPTION);
			field_port.requestFocus();
			return;
		}
		
		int port = Integer.parseInt(portStr);
		
		ClientConnection clientConnection = new ClientConnection(this, serverAddr, port, userName);
		if(clientConnection.login()){
			clientConnection.start();
		}else{
			JOptionPane.showMessageDialog(null, "userName reduplicate", "ERROR", JOptionPane.YES_OPTION);
		}
		
	}
	
	
	
	public static void main(String[] args) {
		new ClientLogin();
	}

}

ChatRoom 

package org.zbq.client;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class ChatRoom {
	private ClientConnection clientConnection;
	private JFrame frame;
	private JTextArea area_chatRoomInfo;
	private JTextArea area_onlineUserList;
	private JTextArea area_inputInfo;
	private JButton but_send;
	private JButton but_clear;
	
	public JTextArea getArea_chatRoomInfo() {
		return area_chatRoomInfo;
	}

	public void setArea_chatRoomInfo(JTextArea area_chatRoomInfo) {
		this.area_chatRoomInfo = area_chatRoomInfo;
	}

	public JTextArea getArea_onlineUserList() {
		return area_onlineUserList;
	}

	public void setArea_onlineUserList(JTextArea area_onlineUserList) {
		this.area_onlineUserList = area_onlineUserList;
	}

	public JTextArea getArea_inputInfo() {
		return area_inputInfo;
	}

	public void setArea_inputInfo(JTextArea area_inputInfo) {
		this.area_inputInfo = area_inputInfo;
	}

	public ChatRoom(ClientConnection clientConnection, String title){
		this.clientConnection = clientConnection;
		frame = new JFrame(title);
		area_chatRoomInfo = new JTextArea(10, 15);
		area_onlineUserList = new JTextArea(25, 10);
		area_inputInfo = new JTextArea(5, 5);
		but_send = new JButton("Send(S)");
		but_clear = new JButton("Clear");
		Color color = new Color(255, 255, 255);
		frame.setBackground(color);
		
		area_inputInfo.setLineWrap(true);
		
		area_inputInfo.setFont(new Font(area_inputInfo.getText(), Font.BOLD, 16));
		area_chatRoomInfo.setFont(new Font(area_chatRoomInfo.getText(), Font.TYPE1_FONT, 16));
		area_onlineUserList.setEditable(false);
		
		int x = (int) (Toolkit.getDefaultToolkit().getScreenSize().width*0.4);
		int y = (int) (Toolkit.getDefaultToolkit().getScreenSize().height*0.2);		
		
		frame.setBounds(x, y, 600, 530);
		frame.add(getLeftContainer(), BorderLayout.CENTER);
		frame.add(getRightContainer(), BorderLayout.EAST);
		addListener();
		
		File imageFileDir = new File("images");
		File[] imageFiles = imageFileDir.listFiles();
		int size = imageFiles.length;
//		System.out.println(size);
		int point =(int) (Math.random()*size);
		
		
//		ImageIcon icon = new ImageIcon("./images/bg.png");
		ImageIcon icon = new ImageIcon(imageFiles[point].getAbsolutePath());
		JLabel imgLabel = new JLabel(icon);
		frame.getLayeredPane().add(imgLabel, new Integer(Integer.MIN_VALUE));
		imgLabel.setBounds(0, 0, icon.getIconWidth(), icon.getIconHeight());
		Container cont = frame.getContentPane();
		((JPanel)cont).setOpaque(false);
		
		area_chatRoomInfo.setOpaque(false);
		area_inputInfo.setOpaque(false);
		area_onlineUserList.setOpaque(false);
		
		frame.setVisible(true);
	}
	
	private Container getLeftContainer(){
		JPanel pan = new JPanel(new BorderLayout());
		JPanel pan1 = new JPanel(new BorderLayout());
		JPanel pan2 = new JPanel(new BorderLayout());
		JPanel pan3 = new JPanel(new GridLayout(1, 2));
		
		pan3.add(but_send, BorderLayout.EAST);
		pan3.add(but_clear, BorderLayout.WEST);
		
		pan2.add(new JLabel(""), BorderLayout.CENTER);
		pan2.add(pan3, BorderLayout.EAST);
		
		pan1.add(pan2, BorderLayout.SOUTH);
		JScrollPane scr = new JScrollPane(area_inputInfo);
		scr.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
		
		pan1.add(scr, BorderLayout.CENTER);
		
		JScrollPane scr2 =new JScrollPane(area_chatRoomInfo);
		pan.add(scr2, BorderLayout.CENTER);
		pan.add(pan1, BorderLayout.SOUTH);
		
		
		area_inputInfo.setBorder(BorderFactory.createEtchedBorder());
		pan.setBorder(BorderFactory.createTitledBorder("Chatroot Information"));
		
		scr.setOpaque(false);
		scr.getViewport().setOpaque(false);
		scr2.setOpaque(false);
		scr2.getViewport().setOpaque(false);
		pan.setOpaque(false);
		pan1.setOpaque(false);
		pan2.setOpaque(false);
		pan3.setOpaque(false);
		return pan;
	}
	
	private Container getRightContainer(){
		JPanel pan = new JPanel();
		JScrollPane scr = new JScrollPane(area_onlineUserList);
		pan.add(scr);
		pan.setBorder(BorderFactory.createTitledBorder("Online User List"));
		
		scr.setOpaque(false);
		scr.getViewport().setOpaque(false);
		pan.setOpaque(false);
		return pan;
	}
	
	
	/*add listener */
	private void addListener(){
		
		
		/*send button add Listener*/
		but_send.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				sendMessage();
				area_inputInfo.requestFocus();
			}
		});
		
		/*alt + s */
		but_send.setMnemonic(KeyEvent.VK_S);
		
		/*clear button add listener*/
		but_clear.addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				ChatRoom.this.area_chatRoomInfo.setText("");
			}
		});
		
		/*window close */
		frame.addWindowListener(new WindowAdapter() {
			
			@Override
			public void windowClosing(WindowEvent e) {
				try{
					ChatRoom.this.clientConnection.sendMessage("client close", "5");
				}catch(Exception ex){
					ex.printStackTrace();
				}
			}
		});
	}
	
	/**
	 *send message 
	 */
	private void sendMessage(){
		String message = this.area_inputInfo.getText();
		if(!"".equals(message)){
			this.area_inputInfo.setText("");
			this.clientConnection.sendMessage(message, "2");
		}
		
	}
	
}


ClientConnectionThread
package org.zbq.client;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.List;

import javax.swing.JOptionPane;

import org.zbq.util.CharUtil;
import org.zbq.util.XMLUtil;

public class ClientConnection extends Thread {
	private String hostAddress;
	
	private int port;
	
	private String userName;
	
	private ClientLogin client;
	
	private Socket socket;
	
	private InputStream input;
	
	private OutputStream output;
	
	private ChatRoom chatRoom;
	
	public ClientConnection(ClientLogin client, String serverAddr, int port, String userName) {
		this.client = client;
		this.hostAddress = serverAddr;
		this.port = port;
		this.userName = userName;
		
		this.connect2Server();
	}
	
	
	/**
	 * connect to server
	 */
	private void connect2Server() {
		try {
			this.socket = new Socket(this.hostAddress, this.port);
			this.input = this.socket.getInputStream();
			this.output = this.socket.getOutputStream();
			
		} catch (IOException e) {
			JOptionPane.showMessageDialog(null, "connect to server error!", "ERROR", JOptionPane.YES_OPTION);
			e.printStackTrace();
		}
	}

	public boolean login(){
		String xml = XMLUtil.constructLoginXML(userName);
		
		try {
			output.write(xml.getBytes());
			
			byte[] buf = new byte[5000];
			int len = input.read(buf);
			
			String loginResultXML = new String(buf, 0, len);
			
			String loginResult = XMLUtil.extractLoginResult(loginResultXML);
			
			if("success".equals(loginResult)){
				this.chatRoom = new ChatRoom(this, userName);
				this.client.getFrame().setVisible(false);
				return true;
			}
			
			return false;		
			
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		return false;
	}
	
	public Socket getSocket() {
		return socket;
	}
	
	/**
	 * 
	 * @param message
	 * @param type
	 * send message to server
	 */
	public void sendMessage(String message, String type){
		
		try {
			int t = Integer.parseInt(type);
			String xml = null;
			
			/*client send message to server*/
			if(CharUtil.CLIENT_MESSAGE == t){
				xml = XMLUtil.constructMessageXML(userName, message);
				
			/*client send message to server for close the window */
			}else if(CharUtil.CLOSE_CLIENT_WINDOW == t){
				xml = XMLUtil.constructCloseClientWindowXML(userName);
			}
			
			
			output.write(xml.getBytes());
		} catch (Exception e) {
			e.printStackTrace();
		}
		
	}
	

	@Override
	public void run() {
		while(true){
			byte[] buf = new byte[5000];
			try {
				int len = input.read(buf);
				String xml = new String(buf, 0, len);
				
				int type = Integer.parseInt(XMLUtil.extractType(xml));
				
				/*update user list*/
				if(CharUtil.USER_LIST == type){
					List<String> list = XMLUtil.extractUserList(xml);
					StringBuffer buff = new StringBuffer();
					for(String user : list){
						buff.append(user + "\n");
					}
					this.chatRoom.getArea_onlineUserList().setText(buff.toString());
					
				/*server send to client chat message*/
				}else if(CharUtil.SERVER_MESSAGE == type){
					String content = XMLUtil.extractContent(xml);
					this.chatRoom.getArea_chatRoomInfo().append(content + "\n");
					
				/*close the client window*/	
				}else if(CharUtil.CLOSE_SERVER_WINDOW == type){
					JOptionPane.showMessageDialog(null, "The Server already close, the program will exit",
							"Information", JOptionPane.INFORMATION_MESSAGE);
					System.exit(0);
					
				/*confirmation the client close*/
				}else if(CharUtil.CLOSE_CLIENT_WINODW_CONFIRMATION == type){
					try{
//						this.getSocket().getOutputStream().close();
//						this.getSocket().getInputStream().close();
						this.getSocket().close();
					}catch (Exception e){
						e.printStackTrace();
					}finally{
						System.exit(0);
					}
				}
				
				
			} catch (IOException e) {
				e.printStackTrace();
			}
			
		}
	}
}































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