计算机网络TCP聊天室实验报告

计算机网络原理实验报告书姓名：XXX班级：XXXXXX学号：XXXXXXXXXXXXXXXXXXXXXX二0一一年五月socket编程一、实验目的本次实验的目的是通过利用Socket编写简单的客户/服务器程序，了解TCP/IP网络的基本通信原理和编程方法，初步掌握TCP/IP网络的传输层上的编程接口（Windows Sockets API），学会利用这些接口来编写简单的网络通信软件。

二、实验内容利用socket编写简单的客户/服务器程序，比如聊天室、文件传输等。

三、实验步骤思路分析✧将服务器与客户端分两部分实现，采用多线程实现多个客户端与服务器端连接✧客户端建立一个Socket与服务器端连接，成功后通过这个Socket来发送和接收数据就可以了。

✧服务器端通过创建一个Socket的Arraylist数组，与指定的本地端口绑定，就可以在端口进行侦听。

如果有客户端连接请求，则在数组中选择一个空Socket，将客户端地址赋给这个Socket。

然后登录成功的客户就可以在服务器上聊天了。

代码实现p ackage TCP_chat_room.gui;i mport java.io.IOException;p ublic class ClientApp {public static void main(String[] args) {/*** javax.swing.UIManager$LookAndFeelInfo[Metal javax.swing.plaf.metal.MetalLookAndFeel]javax.swing.UIManager$LookAndFeelInfo[Nimbus com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel]javax.swing.UIManager$LookAndFeelInfo[CDE/Motif com.sun.java.swing.plaf.motif.MotifLookAndFeel]javax.swing.UIManager$LookAndFeelInfo[Windows com.sun.java.swing.plaf.windows.WindowsLookAndFeel] javax.swing.UIManager$LookAndFeelInfo[Windows Classiccom.sun.java.swing.plaf.windows.WindowsClassicLookAn dFeel]* @author Administrator**/try {// 使用Nimbus皮肤UIManager.setLookAndFeel("com.sun.java.swing.plaf.ni mbus.NimbusLookAndFeel");// localhost 或127.0.0.1ClientFrame frClientFrame = newClientFrame("localhost",Server.CHAT_ROOM_PORT); frClientFrame.setConnected(true);frClientFrame.setVisible(true);// 如果登录成功if(frClientFrame.login("222")){frClientFrame.receiveMessage();}} catch (ClassNotFoundException e) {e.printStackTrace();} catch (InstantiationException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();} catch (UnsupportedLookAndFeelException e) { e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}package TCP_chat_room.action;import java.awt.AWTException;public class ClientFrameAction extends WindowAdapter{ private ClientFrame frClientFrame;public ClientFrameAction(ClientFrame frClientFrame){ this.frClientFrame = frClientFrame;}public void windowIconified(WindowEvent e) {if(SystemTray.isSupported()){final SystemTray system =SystemTray.getSystemTray();Image image = ImageManager.getImage("piScreen.gif");final String toolTip = new String("大家聊天室");final PopupMenu popup = new PopupMenu();final MenuItem miRevert = new MenuItem("Restore");final MenuItem miAddFriends = new MenuItem("AddFriends");final MenuItem miRemoveFriends = new MenuItem("Remove Friends");final MenuItem miModifyFriendsInfo = new MenuItem("Modify Friends Infomation");final MenuItem miSearch = new MenuItem("Search Friends");final MenuItem miExit = new MenuItem("Exit");popup.add(miRevert);popup.addSeparator();popup.add(miAddFriends);popup.add(miRemoveFriends);popup.add(miModifyFriendsInfo);popup.add(miSearch);popup.addSeparator();popup.add(miExit);final TrayIcon icon = newTrayIcon(image,toolTip,popup);try {system.add(icon);frClientFrame.setVisible(false);} catch (AWTException e1) {System.out.print("软件在系统通知区域显示出错");e1.printStackTrace();}miRevert.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { system.remove(icon);frClientFrame.setVisible(true);frClientFrame.setState(JFrame.NORMAL);}});miAddFriends.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) { frClientFrame.setVisible(true);frClientFrame.setState(JFrame.NORMAL);}});miExit.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {windowClosing(null);}});// 不知何用icon.addActionListener(miRevert.getActionListeners()[0]);}}public void windowClosing(WindowEvent e) {int result = MessageBox.showConfirmMessage("您确定要退出聊天系统吗？");if(result == JOptionPane.YES_OPTION){frClientFrame.disconnect();frClientFrame.setVisible(false);frClientFrame.dispose();// System.exit(0);}else{// do nothing}}}package TCP_chat_room.gui;import java.awt.Color;public class ClientFrame extends JFrame { private boolean connected = false;private int port;private String host;private Socket s;private DataInputStream dis;private DataOutputStream dos;public DataInputStream getDis() {return dis;}public DataOutputStream getDos() {return dos;}private final JPanel panel = new JPanel();private final JPanel pnlChatArea = new JPanel();private final ImageIcon imageSetting =ImageManager.getIcon("setting.gif");private final JLabel lblSettingImage = newJLabel(imageSetting);private final JPanel pnlSetting = new JPanel();private final JPanel pnlInputArea = new JPanel();private final JButton bnClose = new JButton("关闭");private final JButton bnSend = new JButton("发送");private final JTextArea txtChatArea = new JTextArea(6,15);private final JTextArea txtInputArea = new JTextArea(2,15);private final Dimension minDimension = new Dimension(300, 413);public boolean isConnected() {return connected;}public void setConnected(boolean connected) {this.connected = connected;}public JTextArea getTxtChatArea() {return txtChatArea;}public JTextArea getTxtInputArea() {return txtInputArea;}public ClientFrame(String host,int port) throws IOException { this.host = host;this.port = port;s = new Socket(host,port);dos = new DataOutputStream(s.getOutputStream());dis = new DataInputStream(s.getInputStream());initComponents();}private void initComponents() {this.setTitle("大家聊天室");this.setSize(minDimension);this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CL OSE);getContentPane().setLayout(null);panel.setBounds(0, 0, 292, 379);getContentPane().setBackground(Color.LIGHT_GRAY);getContentPane().add(panel);panel.setLayout(null);pnlChatArea.setBounds(0, 0, 292, 226);JScrollPane jspChatArea = new JScrollPane(txtChatArea);jspChatArea.setAutoscrolls(false);pnlChatArea.add(jspChatArea);panel.add(pnlChatArea);pnlChatArea.setLayout(null);txtChatArea.setLineWrap(true);txtChatArea.setEditable(false);// pnlChatArea.setBounds(10, 10, 272, 206);jspChatArea.setBounds(10, 10, 272, 206);pnlSetting.setBounds(0, 235, 292, 45);pnlSetting.add(lblSettingImage);panel.add(pnlSetting);pnlInputArea.setBounds(0, 279, 292, 67);JScrollPane jspInputArea = new JScrollPane(txtInputArea);pnlInputArea.add(jspInputArea);panel.add(pnlInputArea);pnlInputArea.setLayout(null);txtInputArea.setLineWrap(true);// pnlInputArea.setBounds(10, 10, 272, 47);jspInputArea.setBounds(10, 10, 272, 47);bnClose.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {// 按下关闭按钮则直接退出聊天室exitSystem();}});bnClose.setBounds(99, 356, 74, 23);panel.add(bnClose);bnSend.addActionListener(new SendActionListener(this));bnSend.setBounds(197, 356, 74, 23);bnSend.setMnemonic(0);panel.add(bnSend);this.setMinimumSize(minDimension);this.addWindowListener(new ClientFrameAction(this));// this.getRootPane().setDefaultButton(bnSend);}public boolean login(String nickname){try {dos.writeUTF("login_" + nickname);int loginResult = dis.readInt();if(loginResult == 1){System.out.println("登陆成功，欢迎进入聊天室！");return true;}else if(loginResult == -1){System.out.println("登陆失败，没有以login_开头");return false;}else if(loginResult == 2){System.out.println("登陆失败，用户昵称已经存在！");return false;}} catch (IOException e) {e.printStackTrace();}return false;}private class SendActionListener implements ActionListener{ private ClientFrame frClientFrame;public SendActionListener(ClientFrame frClientFrame){ this.frClientFrame = frClientFrame;}public void actionPerformed(ActionEvent e) {String saying =frClientFrame.getTxtInputArea().getText();// System.out.println(saying);frClientFrame.getTxtInputArea().setText(null);try {frClientFrame.getDos().writeUTF(saying);frClientFrame.getDos().flush();} catch (IOException e1) {e1.printStackTrace();}}}public void exitSystem(){new ClientFrameAction(this).windowClosing(null); }public void disconnect() {try {this.setConnected(false);dos.close();dis.close();s.close();} catch (IOException e3) {e3.printStackTrace();}}public void receiveMessage(){new Thread(new ThreadreceiveMessage(this)).start();}private class ThreadreceiveMessage implements Runnable{ private ClientFrame frClientFrame;public ThreadreceiveMessage(ClientFrame frClientFrame){ this.frClientFrame = frClientFrame;}String message = "";public void run() {try {while(isConnected()){message = dis.readUTF();System.out.println(message);frClientFrame.txtChatArea.append(message + "\n");Thread.sleep(100);}}catch (IOException e) {e.printStackTrace();} catch (InterruptedException e) {Thread.interrupted();}}}}package TCP_chat_room.gui;import javax.swing.JOptionPane;public class MessageBox {public static void showWarningMessage (String message) { // confirmdialog是可选是或否的对话框// JOptionPane.showConfirmDialog(null, message, "温馨提示", JOptionPane.WARNING_MESSAGE);JOptionPane.showMessageDialog(null, message, "温馨提示", JOptionPane.WARNING_MESSAGE);// JOptionPane.showMessageDialog(null, message);}public static void showErrorMessage(String message){ JOptionPane.showMessageDialog(null, message, "错误提示", JOptionPane.ERROR_MESSAGE);}public static int showConfirmMessage(String message){ return JOptionPane.showConfirmDialog(null, message, "温馨提示",JOptionPane.YES_NO_OPTION,JOptionPane.ERROR_MESS AGE);}}package TCP_chat_room.gui;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import .ServerSocket;import .Socket;import .SocketException;import java.util.Collection;import java.util.Collections;import java.util.Hashtable;import java.util.Iterator;import java.util.Map;public class Server {public static final int CHAT_ROOM_PORT = 44444;private int port;private ServerSocket ss;private Socket socket;private DataInputStream dis;private DataOutputStream dos;private Map<Socket, String> clients = Collections.synchronizedMap(new Hashtable<Socket, String>());public Server(int port) throws IOException {ss = new ServerSocket(port);}public boolean containedInClients(String tempName) { Collection<String> names = clients.values();Iterator<String> it = names.iterator();while (it.hasNext()) {String existedName = it.next();if (existedName == tempName) {return true;}}return false;}// public void validataLogin() throws IOException{//// }public void start() throws IOException {while (true) {socket = ss.accept();new Thread(new ClientThread(socket)).start();}}private class ClientThread implements Runnable { private Socket client;public ClientThread(Socket client) {this.client = client;}public void run() {{try {dis = newDataInputStream(client.getInputStream());dos = newDataOutputStream(client.getOutputStream());} catch (IOException e1) {e1.printStackTrace();}try {// 处理用户的登录信息String loginMessage = dis.readUTF();String nickname = loginMessage.substring(6);if (loginMessage.startsWith("login_")) {boolean existed =containedInClients(nickname);if (existed) {dos.writeInt(2);} else { // 用户昵称还不存在，故登陆成功dos.writeInt(1);clients.put(client, loginMessage);sendToAllMessage(nickname + "进入聊天室！");String message;try {while (true) {dis = newDataInputStream(client.getInputStream());dos = newDataOutputStream(client.getOutputStream());message = dis.readUTF();if(message != null){sendToAllMessage(nickname + "说：" + message);}// dos.flush();Thread.sleep(100);}} catch (SocketException e) {// 暂时什么也不做} catch (InterruptedException e) {Thread.interrupted();}}} else {dos.writeInt(-1);}}catch (IOException e) {e.printStackTrace();} finally {try {if (dos != null) {dos.close();}if (dis != null) {dis.close();}if (client != null) {client.close();}if (ss != null) {ss.close();}} catch (IOException e) {e.printStackTrace();}}}}}public void sendToAllMessage(String message) throws IOException {Collection<Socket> sockets = clients.keySet();Iterator<Socket> it = sockets.iterator();while (it.hasNext()) {Socket s = it.next();dos = new DataOutputStream(s.getOutputStream());dos.writeUTF(message);}dos.flush();}}package TCP_chat_room.gui;import java.io.IOException;public class ServerApp {public static void main(String[] args) {try {Server server = newServer(Server.CHAT_ROOM_PORT);System.out.println("端口号为" +Server.CHAT_ROOM_PORT+ "服务器启动成功");//启动server,而server会首先验证昵称是否正确，即调用validataLogin()方法server.start();} catch (IOException e) {// System.out.println("端口正在使用中......");// System.out.println("请关闭相关程序或重新设置端口号");e.printStackTrace();}}}试验截图：首先启动服务器端：在启动客户端：启动多个客户端就可以实现聊天了：四、实验结果实现了基本的点对点的聊天，并附带一些小功能，如关闭窗口时弹出警告窗口：最小化到托盘：对最小化的图标进行操作：按exit可退出，restore可还原成用户界面五、实验心得由于时间比较紧迫，这个聊天室是比较简化的。