基于java网络聊天室--客户端

ChatClient.java

包含名为ChatClient的public类，其主要功能为定义客户端的界面，添加时间监听与事件处理。该类定义了Connect（）与DisConnect（）方法实现与客户端的连接与断开连接。当登陆到指定的服务器时，调用ClientReceive类实现消息收发，同时该类还定义了SendMessaga（）方法来其他用户发送带有表情的消息或悄悄话。

  1 /*  2  * To change this license header, choose License Headers in Project Properties.  3  * To change this template file, choose Tools | Templates  4  * and open the template in the editor.  5  */  6 package com.silianbo.client;  7   8 /**  9  * 10  * @author silianbo 11  * 客户端主界面 12  */ 13 import com.silianbo.CaptureScreen; 14 import static com.silianbo.CaptureScreen.captureScreen; 15 import com.silianbo.client.ConnectConf; 16 import com.silianbo.client.Help; 17 import com.silianbo.client.UserConf; 18  19 import com.sun.security.ntlm.Client; 20 import java.awt.BorderLayout; 21 import java.awt.Component; 22 import java.awt.Container; 23 import java.awt.Dimension; 24 import java.awt.GridBagConstraints; 25 import java.awt.GridBagLayout; 26 import java.awt.Insets; 27 import java.awt.Toolkit; 28 import java.awt.event.ActionEvent; 29 import java.awt.event.ActionListener; 30 import java.awt.event.WindowAdapter; 31 import java.awt.event.WindowEvent; 32 import java.io.ObjectInputStream; 33 import java.io.ObjectOutputStream; 34 import java.net.Socket; 35 import java.util.logging.Level; 36 import java.util.logging.Logger; 37 import javax.swing.JButton; 38 import javax.swing.JCheckBox; 39 import javax.swing.JComboBox; 40 import javax.swing.JFrame; 41 import javax.swing.JLabel; 42 import javax.swing.JMenu; 43 import javax.swing.JMenuBar; 44 import javax.swing.JMenuItem; 45 import javax.swing.JOptionPane; 46 import javax.swing.JPanel; 47 import javax.swing.JScrollPane; 48 import javax.swing.JTextArea; 49 import javax.swing.JTextField; 50 import javax.swing.JToolBar; 51 import javax.swing.UIManager; 52 import javax.swing.UnsupportedLookAndFeelException; 53  54 /* 55  * 聊天客户端的主框架类 56  */ 57 public final class ChatClient extends JFrame implements ActionListener { 58  59     /** 60      * 版本控制，默认版本控制1L 61      */ 62     private static final long serialVersionUID = 1L; 63      64     String ip = "127.0.0.1";  //连接到服务端的ip地址 65     int port = 8888;         //连接到服务端的端口号 66     String userName = "silianbo";    //用户名 67     int type = 0;      //，用户连接标记，其中0表示未连接，1表示已连接 68  69     JComboBox combobox;   //选择发送消息的接受者 70     JTextArea messageShow;  //客户端的信息显示 71     JScrollPane messageScrollPane; //信息显示的滚动条 72  73     JLabel express, sendToLabel, messageLabel; 74  75     JTextField clientMessage;//客户端消息的发送 76     JCheckBox checkbox;//悄悄话 77     JComboBox actionlist;//表情选择 78     JButton clientMessageButton;//发送消息 79     JTextField showStatus;//显示用户连接状态 80  81     Socket socket; 82     ObjectOutputStream output;//网络套接字输出流 83     ObjectInputStream input;//网络套接字输入流 84  85     ClientReceive recvThread; 86  87     //建立菜单栏 88     JMenuBar jMenuBar = new JMenuBar(); 89     //建立菜单组 90     JMenu operateMenu = new JMenu("操作"); 91     //建立菜单项 92     JMenuItem loginItem = new JMenuItem("用户登录"); 93     JMenuItem logoffItem = new JMenuItem("用户注销"); 94     JMenuItem exitItem = new JMenuItem("退出"); 95  96     JMenu conMenu = new JMenu("设置"); 97     JMenuItem userItem = new JMenuItem("用户设置"); 98     JMenuItem connectItem = new JMenuItem("连接设置"); 99 100     JMenu helpMenu = new JMenu("帮助");101     JMenuItem helpItem = new JMenuItem("帮助");102 103     //建立工具栏104     JToolBar toolBar = new JToolBar();105 106     //建立工具栏中的按钮组件107     JButton loginButton;//用户登录108     JButton logoffButton;//用户注销109     JButton userButton;//用户信息的设置110     JButton connectButton;//连接设置111     JButton exitButton;//退出按钮112     JButton captureScreenButton; //截屏按钮113 114     //框架的大小115     Dimension faceSize = new Dimension(550, 550);116 117     JPanel downPanel;118     GridBagLayout girdBag;119     GridBagConstraints girdBagCon;120 121     public ChatClient() {122         init();//初始化程序123 124         //添加框架的关闭事件处理125         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);126         this.pack();127         //设置框架的大小128         this.setSize(faceSize);129 130         //设置运行时窗口的位置131         Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();132         this.setLocation((int) (screenSize.width - faceSize.getWidth()) / 2,133                 (int) (screenSize.height - faceSize.getHeight()) / 2);134         this.setResizable(false);135         this.setTitle("聊天室客户端"); //设置标题136 137         setVisible(true);138 139         //为操作菜单栏设置热键'V'140         operateMenu.setMnemonic('O');141 142     }143 144     /**145      * 程序初始化函数146      */147     public void init() {148 149         Container contentPane = getContentPane();150         contentPane.setLayout(new BorderLayout());151 152         //添加菜单栏，对应55行相关介绍153         jMenuBar.add(operateMenu);   //操作（1.2.3）154         operateMenu.add(loginItem);  //1.用户登录155         operateMenu.add(logoffItem); //2.用户注销156         operateMenu.add(exitItem);   //2.退出157 158         jMenuBar.add(conMenu);       //设置(a.b)159         conMenu.add(userItem);       //a.用户设置160         conMenu.add(connectItem);    //b.连接设置161 162         jMenuBar.add(helpMenu);      //帮助（I）    163         helpMenu.add(helpItem);      //I.帮助164 165         setJMenuBar(jMenuBar);166 167         //初始化按钮168         loginButton = new JButton("登录");169         logoffButton = new JButton("注销");170         userButton = new JButton("用户设置");171         connectButton = new JButton("连接设置");172         exitButton = new JButton("退出");173         captureScreenButton = new JButton("全屏截屏");174         JButton  screenShotButton = new JButton("区域截图");175         176         //当鼠标放上显示信息177         loginButton.setToolTipText("连接到指定的服务器");178         logoffButton.setToolTipText("与服务器断开连接");179         userButton.setToolTipText("设置用户信息");180         connectButton.setToolTipText("设置所要连接到的服务器信息");181         captureScreenButton.setToolTipText("现在只能全屏截下全屏");182         //将按钮添加到工具栏183         toolBar.add(userButton);184         Component add = toolBar.add(connectButton);185         toolBar.addSeparator();//添加分隔栏186         toolBar.add(loginButton);187         toolBar.add(logoffButton);188         toolBar.addSeparator();//添加分隔栏189         toolBar.add(exitButton);190         toolBar.add(captureScreenButton);191         toolBar.add(screenShotButton);192         193         contentPane.add(toolBar, BorderLayout.NORTH);194 195         checkbox = new JCheckBox("悄悄话");196         checkbox.setSelected(false);197 198         actionlist = new JComboBox();199         actionlist.addItem("@/微笑@");200         actionlist.addItem("@/高兴@");201         actionlist.addItem("@/轻轻@");202         actionlist.addItem("@/生气@");203         actionlist.addItem("@/小心@");204         actionlist.addItem("@/静静@");205         actionlist.setSelectedIndex(0);206 207         //初始时208         loginButton.setEnabled(true);209         logoffButton.setEnabled(false);210 211         //为菜单栏添加事件监听212         loginItem.addActionListener(this);213         logoffItem.addActionListener(this);214         exitItem.addActionListener(this);215         userItem.addActionListener(this);216         connectItem.addActionListener(this);217         helpItem.addActionListener(this);218 219         //添加按钮的事件侦听220         loginButton.addActionListener(this);221         logoffButton.addActionListener(this);222         userButton.addActionListener(this);223         connectButton.addActionListener(this);224         exitButton.addActionListener(this);225         226         /*227         *全屏截屏事件监听处理228         */229         captureScreenButton.addActionListener((ActionEvent e) -> {230             try {231                 CaptureScreen.RandomName filename = new CaptureScreen.RandomName();232                 captureScreen("C:\\Users\\silianbo\\Desktop\\计算机网络课程设计\\image", filename + ".png");233             } catch (Exception ex) {234                 Logger.getLogger(Client.class.getName()).log(Level.SEVERE, null, ex);235             }236         });237         /**238          * 区域截屏监听239          */240         screenShotButton.addActionListener(this);241         242         combobox = new JComboBox();243         combobox.insertItemAt("所有人", 0);244         combobox.setSelectedIndex(0);245 246         messageShow = new JTextArea();247         messageShow.setEditable(false);248         //添加滚动条249         messageScrollPane = new JScrollPane(messageShow,250                 JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,251                 JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);252         messageScrollPane.setPreferredSize(new Dimension(400, 400));253         messageScrollPane.revalidate();254 255         clientMessage = new JTextField(23);256         clientMessage.setEnabled(false);257         clientMessageButton = new JButton();258         clientMessageButton.setText("发送");259 260         //添加系统消息的事件侦听261         clientMessage.addActionListener(this);262         clientMessageButton.addActionListener(this);263 264         sendToLabel = new JLabel("发送至:");265         express = new JLabel("         表情:   ");266         messageLabel = new JLabel("发送消息:");267         downPanel = new JPanel();268         girdBag = new GridBagLayout();269         downPanel.setLayout(girdBag);270 271         girdBagCon = new GridBagConstraints();272         girdBagCon.gridx = 0;273         girdBagCon.gridy = 0;274         girdBagCon.gridwidth = 5;275         girdBagCon.gridheight = 2;276         girdBagCon.ipadx = 5;277         girdBagCon.ipady = 5;278         JLabel none = new JLabel("    ");279         girdBag.setConstraints(none, girdBagCon);280         downPanel.add(none);281 282         girdBagCon = new GridBagConstraints();283         girdBagCon.gridx = 0;284         girdBagCon.gridy = 2;285         girdBagCon.insets = new Insets(1, 0, 0, 0);286         //girdBagCon.ipadx = 5;287         //girdBagCon.ipady = 5;288         girdBag.setConstraints(sendToLabel, girdBagCon);289         downPanel.add(sendToLabel);290 291         girdBagCon = new GridBagConstraints();292         girdBagCon.gridx = 1;293         girdBagCon.gridy = 2;294         girdBagCon.anchor = GridBagConstraints.LINE_START;295         girdBag.setConstraints(combobox, girdBagCon);296         downPanel.add(combobox);297 298         girdBagCon = new GridBagConstraints();299         girdBagCon.gridx = 2;300         girdBagCon.gridy = 2;301         girdBagCon.anchor = GridBagConstraints.LINE_END;302         girdBag.setConstraints(express, girdBagCon);303         downPanel.add(express);304 305         girdBagCon = new GridBagConstraints();306         girdBagCon.gridx = 3;307         girdBagCon.gridy = 2;308         girdBagCon.anchor = GridBagConstraints.LINE_START;309         //girdBagCon.insets = new Insets(1,0,0,0);310         //girdBagCon.ipadx = 5;311         //girdBagCon.ipady = 5;312         girdBag.setConstraints(actionlist, girdBagCon);313         downPanel.add(actionlist);314 315         girdBagCon = new GridBagConstraints();316         girdBagCon.gridx = 4;317         girdBagCon.gridy = 2;318         girdBagCon.insets = new Insets(1, 0, 0, 0);319 //        girdBagCon.ipadx = 5;320 //        girdBagCon.ipady = 5;321         girdBag.setConstraints(checkbox, girdBagCon);322         downPanel.add(checkbox);323 324         girdBagCon = new GridBagConstraints();325         girdBagCon.gridx = 0;326         girdBagCon.gridy = 3;327         girdBag.setConstraints(messageLabel, girdBagCon);328         downPanel.add(messageLabel);329 330         girdBagCon = new GridBagConstraints();331         girdBagCon.gridx = 1;332         girdBagCon.gridy = 3;333         girdBagCon.gridwidth = 3;334         girdBagCon.gridheight = 1;335         girdBag.setConstraints(clientMessage, girdBagCon);336         downPanel.add(clientMessage);337 338         girdBagCon = new GridBagConstraints();339         girdBagCon.gridx = 4;340         girdBagCon.gridy = 3;341         girdBag.setConstraints(clientMessageButton, girdBagCon);342         downPanel.add(clientMessageButton);343 344         showStatus = new JTextField(35);345         showStatus.setEditable(false);346         girdBagCon = new GridBagConstraints();347         girdBagCon.gridx = 0;348         girdBagCon.gridy = 5;349         girdBagCon.gridwidth = 5;350         girdBag.setConstraints(showStatus, girdBagCon);351         downPanel.add(showStatus);352 353         contentPane.add(messageScrollPane, BorderLayout.CENTER);354         contentPane.add(downPanel, BorderLayout.SOUTH);355 356         //关闭程序时的操作357         this.addWindowListener(358                 new WindowAdapter() {359                     @Override360                     public void windowClosing(WindowEvent e) {361                         if (type == 1) {362                             DisConnect();363                         }364                         System.exit(0);365                     }366                 }367         );368     }369 370     /**371      * 事件处理372      */373     @Override374     public void actionPerformed(ActionEvent e) {375         Object obj = e.getSource();376 377         if (obj == userItem || obj == userButton) { //用户信息设置378             //调出用户信息设置对话框379             UserConf userConf = new UserConf(this, userName);380             userConf.setVisible(true);381             userName = userConf.userInputName;382         } else if (obj == connectItem || obj == connectButton) { //连接服务端设置383             //调出连接设置对话框384             ConnectConf conConf = new ConnectConf(this, ip, port);385             conConf.setVisible(true);386             ip = conConf.userInputIp;387             port = conConf.userInputPort;388         } else if (obj == loginItem || obj == loginButton) { //登录389             Connect();390         } else if (obj == logoffItem || obj == logoffButton) { //注销391             DisConnect();392             showStatus.setText("");393         } else if (obj == clientMessage || obj == clientMessageButton) { //发送消息394             SendMessage();395             clientMessage.setText("");396         } else if (obj == exitButton || obj == exitItem) { //退出397             int j = JOptionPane.showConfirmDialog(398                     this, "真的要退出吗?", "退出",399                     JOptionPane.YES_OPTION, JOptionPane.QUESTION_MESSAGE);400 401             if (j == JOptionPane.YES_OPTION) {402                 if (type == 1) {403                     DisConnect();404                 }405                 System.exit(0);406             }407         } else if (obj == helpItem) { //菜单栏中的帮助408             //调出帮助对话框409             Help helpDialog = new Help(this);410             helpDialog.setVisible(true);411         }412     }413 /**414  * 连接服务器415  */416     public void Connect() {417         try {418             socket = new Socket(ip, port);419         } catch (Exception e) {420             JOptionPane.showConfirmDialog(421                     this, "不能连接到指定的服务器。\n请确认连接设置是否正确。", "提示",422                     JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE);423             return;424         }425 426         try {427             output = new ObjectOutputStream(socket.getOutputStream());428             output.flush();429             430             input = new ObjectInputStream(socket.getInputStream());431 432             output.writeObject(userName);433             output.flush();434 435             recvThread = new ClientReceive(socket, output, input, combobox, messageShow, showStatus);436             recvThread.start();437 438             loginButton.setEnabled(false);439             loginItem.setEnabled(false);440             userButton.setEnabled(false);441             userItem.setEnabled(false);442             connectButton.setEnabled(false);443             connectItem.setEnabled(false);444             logoffButton.setEnabled(true);445             logoffItem.setEnabled(true);446             clientMessage.setEnabled(true);447             messageShow.append("连接服务器 " + ip + ":" + port + " 成功...\n");448             type = 1;//标志位设为已连接449         } catch (Exception e) {450             System.out.println(e);451         }452     }453 454     /**455      *服务器注销456      */457     public void DisConnect() {458         loginButton.setEnabled(true);459         loginItem.setEnabled(true);460         userButton.setEnabled(true);461         userItem.setEnabled(true);462         connectButton.setEnabled(true);463         connectItem.setEnabled(true);464         logoffButton.setEnabled(false);465         logoffItem.setEnabled(false);466         clientMessage.setEnabled(false);467 468         if (socket.isClosed()) {469             return;470         }471 472         try {473             output.writeObject("用户下线");474             output.flush();475 476             input.close();477             output.close();478             socket.close();479             messageShow.append("已经与服务器断开连接...\n");480             type = 0;//标志位设为未连接481         } catch (Exception e) {482             //483         }484     }485 486     public void SendMessage() {487         String toSomebody = combobox.getSelectedItem().toString();488         String status = "";489         if (checkbox.isSelected()) {490             status = "悄悄话";491         }492 493         String action = actionlist.getSelectedItem().toString();494         String message = clientMessage.getText();495 496         if (socket.isClosed()) {497             return;498         }499 500         try {501             output.writeObject("聊天信息");502             output.flush();503             output.writeObject(toSomebody);504             output.flush();505             output.writeObject(status);506             output.flush();507             output.writeObject(action);508             output.flush();509             output.writeObject(message);510             output.flush();511         } catch (Exception e) {512             //513         }514     }515 516     public static void main(String[] args) throws UnsupportedLookAndFeelException {517         try {518             UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());519         } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException e) {520         }521         ChatClient chatClient = new ChatClient();522     }523 }

 

ConnectConf.java

该类继承自Jdialog，是用户对所有要连接的服务器IP及监听端口进行修改配置的类

  1 /*  2  * To change this license header, choose License Headers in Project Properties.  3  * To change this template file, choose Tools | Templates  4  * and open the template in the editor.  5  */  6 package com.silianbo.client;  7   8 import java.awt.BorderLayout;  9 import java.awt.Container; 10 import java.awt.Dimension; 11 import java.awt.GridLayout; 12 import java.awt.Label; 13 import java.awt.Toolkit; 14 import java.awt.event.ActionEvent; 15 import java.awt.event.WindowAdapter; 16 import java.awt.event.WindowEvent; 17 import java.net.InetAddress; 18 import java.net.UnknownHostException; 19 import javax.swing.JButton; 20 import javax.swing.JDialog; 21 import javax.swing.JFrame; 22 import javax.swing.JLabel; 23 import javax.swing.JPanel; 24 import javax.swing.JTextField; 25  26 /** 27  * 28  * @author silianbo  29  * 生成连接信息输入的对话框 让用户输入连接服务器的IP和端口 30  */ 31 public class ConnectConf extends JDialog { 32  33     /** 34      * 35      */ 36     private static final long serialVersionUID = 1L; 37     JPanel panelUserConf = new JPanel(); 38     JButton save = new JButton(); 39     JButton cancel = new JButton(); 40     JLabel DLGINFO = new JLabel( 41             "                  默认连接设置为  127.0.0.1:8888"); 42  43     JPanel panelSave = new JPanel(); 44     JLabel message = new JLabel(); 45  46     String userInputIp; 47     int userInputPort; 48  49     JTextField inputIp; 50     JTextField inputPort; 51  52     public ConnectConf(JFrame frame, String ip, int port) { 53         super(frame, true); 54         this.userInputIp = ip; 55         this.userInputPort = port; 56         try { 57             jbInit(); 58         } catch (Exception e) { 59         } 60         //设置运行位置，使对话框居中 61         Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); 62         this.setLocation((int) (screenSize.width - 400) / 2 + 50, 63                 (int) (screenSize.height - 600) / 2 + 150); 64         this.setResizable(false); 65     } 66  67     private void jbInit() throws Exception { 68         this.setSize(new Dimension(300, 130)); 69         this.setTitle("连接设置"); 70         message.setText(" 请输入服务器的IP地址:"); 71         inputIp = new JTextField(10); 72         inputIp.setText(userInputIp); 73         inputPort = new JTextField(4); 74         inputPort.setText("" + userInputPort); 75         save.setText("保存"); 76         cancel.setText("取消"); 77  78         panelUserConf.setLayout(new GridLayout(2, 2, 1, 1)); 79         panelUserConf.add(message); 80         panelUserConf.add(inputIp); 81         panelUserConf.add(new JLabel(" 请输入服务器的端口号:")); 82         panelUserConf.add(inputPort); 83  84         panelSave.add(new Label("              ")); 85         panelSave.add(save); 86         panelSave.add(cancel); 87         panelSave.add(new Label("              ")); 88  89         Container contentPane = getContentPane(); 90         contentPane.setLayout(new BorderLayout()); 91         contentPane.add(panelUserConf, BorderLayout.NORTH); 92         contentPane.add(DLGINFO, BorderLayout.CENTER); 93         contentPane.add(panelSave, BorderLayout.SOUTH); 94  95         //保存按钮的事件处理 96         save.addActionListener((ActionEvent a) -> { 97             int savePort; 98             //判断端口号是否合法 99             try {100                 userInputIp = "" + InetAddress.getByName(inputIp.getText());101                 userInputIp = userInputIp.substring(1);102             } catch (UnknownHostException e) {103                 DLGINFO.setText(104                         "                                    错误的IP地址！");105                 106                 return;107             }108             //userInputIp = inputIP;109             110             //判断端口号是否合法111             try {112                 savePort = Integer.parseInt(inputPort.getText());113                 114                 if (savePort < 1 || savePort > 65535) {115                     DLGINFO.setText("               侦听端口必须是0-65535之间的整数!");116                     inputPort.setText("");117                     return;118                 }119                 userInputPort = savePort;120                 dispose();121             } catch (NumberFormatException e) {122                 DLGINFO.setText("                错误的端口号,端口号请填写整数!");123                 inputPort.setText("");124             }125         });126 127         //关闭对话框时的操作128         this.addWindowListener(129                 new WindowAdapter() {130                     @Override131                     public void windowClosing(WindowEvent e) {132                         DLGINFO.setText("                  默认连接设置为  127.0.0.1:8888");133                     }134                 }135         );136 137         //取消按钮的事件处理138         cancel.addActionListener((ActionEvent e) -> {139             DLGINFO.setText("                  默认连接设置为  127.0.0.1:8888");140             dispose();141         });142     }143 }

View Code

UserConf.java

该类继承自Jdialog，是用户对链接到服务器时所显示的用户名进行修改配置的类。

  1 /*  2  * To change this license header, choose License Headers in Project Properties.  3  * To change this template file, choose Tools | Templates  4  * and open the template in the editor.  5  */  6 package com.silianbo.client;  7   8 import java.awt.*;  9 import javax.swing.*; 10 import java.awt.event.*; 11 /** 12  * 13  * @author silianbo 14  * 生成用户信息输入对话框的类 15  * 让用户输入自己的用户名 16  */ 17 public class UserConf extends JDialog { 18     /** 19      *  20      */ 21     private static final long serialVersionUID = 1L; 22     JPanel panelUserConf = new JPanel(); 23     JButton save = new JButton(); 24     JButton cancel = new JButton(); 25     JLabel DLGINFO=new JLabel( 26         "                         默认用户名为：silianbo"); 27  28     JPanel panelSave = new JPanel(); 29     JLabel message = new JLabel(); 30     String userInputName; 31  32     JTextField userName ; 33  34     public UserConf(JFrame frame,String str) { 35         super(frame, true); 36         this.userInputName = str; 37         try { 38             jbInit(); 39         } 40         catch (Exception e) { 41             e.printStackTrace(); 42         } 43         //设置运行位置，使对话框居中 44         Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); 45         this.setLocation( (int) (screenSize.width - 400) / 2 + 50, 46                         (int) (screenSize.height - 600) / 2 + 150); 47         this.setResizable(false); 48     } 49  50     private void jbInit() throws Exception { 51         this.setSize(new Dimension(300, 120)); 52         this.setTitle("用户设置"); 53         message.setText("请输入用户名:"); 54         userName = new JTextField(10); 55         userName.setText(userInputName); 56         save.setText("保存"); 57         cancel.setText("取消"); 58  59         panelUserConf.setLayout(new FlowLayout()); 60         panelUserConf.add(message); 61         panelUserConf.add(userName); 62  63         panelSave.add(new Label("              ")); 64         panelSave.add(save); 65         panelSave.add(cancel); 66         panelSave.add(new Label("              ")); 67  68         Container contentPane = getContentPane(); 69         contentPane.setLayout(new BorderLayout()); 70         contentPane.add(panelUserConf, BorderLayout.NORTH); 71         contentPane.add(DLGINFO, BorderLayout.CENTER); 72         contentPane.add(panelSave, BorderLayout.SOUTH); 73  74         //保存按钮的事件处理 75         save.addActionListener( 76             new ActionListener() { 77                 public void actionPerformed (ActionEvent a) { 78                     if(userName.getText().equals("")){ 79                         DLGINFO.setText( 80                             "                                 用户名不能为空！"); 81                         userName.setText(userInputName); 82                         return; 83                     } 84                     else if(userName.getText().length() > 15){ 85                         DLGINFO.setText("                    用户名长度不能大于15个字符！"); 86                         userName.setText(userInputName); 87                         return; 88                     } 89                     userInputName = userName.getText(); 90                     dispose(); 91                 } 92             } 93         ); 94  95         //关闭对话框时的操作 96         this.addWindowListener( 97             new WindowAdapter(){ 98                                 @Override 99                 public void windowClosing(WindowEvent e){100                     DLGINFO.setText("                         默认用户名为：silianbo");101                 }102             }103         );104 105         //取消按钮的事件处理106         cancel.addActionListener((ActionEvent e) -> {107                     DLGINFO.setText("                         默认用户名为：silianbo");108                     dispose();109                 });110     }111 }

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Help.java

客户端程序的帮助类

 1 /* 2  * To change this license header, choose License Headers in Project Properties. 3  * To change this template file, choose Tools | Templates 4  * and open the template in the editor. 5  */ 6 package com.silianbo.client; 7  8 /** 9  *10  * @author silianbo11  */12 import java.awt.*;13 import javax.swing.*;14 import java.awt.event.*;15 16 /**17  * 生成设置对话框的类18  */19 public class Help extends JDialog {20 21     /**22      * 23      */24     private static final long serialVersionUID = 1L;25     JPanel titlePanel = new JPanel();26     JPanel contentPanel = new JPanel();27     JPanel closePanel = new JPanel();28 29     JButton close = new JButton();30     JLabel title = new JLabel("聊天室客户端帮助");31     JTextArea help = new JTextArea(); 32 33     Color bg = new Color(255,255,255);34 35     public Help(JFrame frame) {36         super(frame, true);37         try {38             jbInit();39         }40         catch (Exception e) {41             e.printStackTrace();42         }43         //设置运行位置，使对话框居中44         Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();45         this.setLocation( (int) (screenSize.width - 400) / 2 + 25,46                         (int) (screenSize.height - 320) / 2);47         this.setResizable(false);48     }49 50     private void jbInit() throws Exception {51         this.setSize(new Dimension(350, 270));52         this.setTitle("帮助");53         54         titlePanel.setBackground(bg);;55         contentPanel.setBackground(bg);56         closePanel.setBackground(bg);57         58         help.setText("1、设置所要连接服务端的IP地址和端口"+59             "（默认设置为\n      127.0.0.1:8888）。\n"+60             "2、输入你的用户名（默认设置为:silianbo）。\n"+61             "3、点击“登录”便可以连接到指定的服务器；\n"+62             "      点击“注销”可以和服务器端开连接。\n"+63             "4、选择需要接受消息的用户，在消息栏中写入消息，\n"+64             "      同时选择表情，之后便可发送消息。\n");65         help.setEditable(false);66 67         titlePanel.add(new Label("              "));68         titlePanel.add(title);69         titlePanel.add(new Label("              "));70 71         contentPanel.add(help);72 73         closePanel.add(new Label("              "));74         closePanel.add(close);75         closePanel.add(new Label("              "));76 77         Container contentPane = getContentPane();78         contentPane.setLayout(new BorderLayout());79         contentPane.add(titlePanel, BorderLayout.NORTH);80         contentPane.add(contentPanel, BorderLayout.CENTER);81         contentPane.add(closePanel, BorderLayout.SOUTH);82 83         close.setText("关闭");84         //事件处理85         close.addActionListener((ActionEvent e) -> {86                     dispose();87                 });88     }89 }

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ClientReceive.java

该类是实现服务器端与客户端消息收发的类

 1 /* 2  * To change this license header, choose License Headers in Project Properties. 3  * To change this template file, choose Tools | Templates 4  * and open the template in the editor. 5  */ 6 package com.silianbo.client; 7  8 import java.io.IOException; 9 import java.io.ObjectInputStream;10 import java.io.ObjectOutputStream;11 import java.net.Socket;12 import javax.swing.JComboBox;13 import javax.swing.JTextArea;14 import javax.swing.JTextField;15 16 /**17  *18  * @author silianbo19  * 聊天客户端消息收发类20  */21 public class ClientReceive extends Thread {22     private final JComboBox combobox;23     private final JTextArea textarea;24     25     Socket socket;26     ObjectOutputStream output;27     ObjectInputStream  input;28     JTextField showStatus;29 30     public ClientReceive(Socket socket,ObjectOutputStream output,31         ObjectInputStream  input,JComboBox combobox,JTextArea textarea,JTextField showStatus){32 33         this.socket = socket;34         this.output = output;35         this.input = input;36         this.combobox = combobox;37         this.textarea = textarea;38         this.showStatus = showStatus;39     }40     41         @Override42     public void run(){43         while(!socket.isClosed()){44             try{45                 String type = (String)input.readObject();46                 47                 if(type.equalsIgnoreCase("系统信息")){48                     String sysmsg = (String)input.readObject();49                     textarea.append("系统信息: "+sysmsg);50                 }51                 else if(type.equalsIgnoreCase("服务关闭")){52                     output.close();53                     input.close();54                     socket.close();55                     56                     textarea.append("服务器已关闭！\n");57                     58                     break;59                 }60                 else if(type.equalsIgnoreCase("聊天信息")){61                     String message = (String)input.readObject();62                     textarea.append(message);63                 }64                 else if(type.equalsIgnoreCase("用户列表")){65                     String userlist = (String)input.readObject();66                     String usernames[] = userlist.split("\n");67                     combobox.removeAllItems();68                     69                     int i =0;70                     combobox.addItem("所有人");71                     while(i < usernames.length){72                         combobox.addItem(usernames[i]);73                         i ++;74                     }75                     combobox.setSelectedIndex(0);76                     showStatus.setText("在线用户 " + usernames.length + " 人");77                 }78             }79             catch (IOException | ClassNotFoundException e ){80                 System.out.println(e);81             }82         }83     }84 }

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