【项目实战】用 Java 写了一个类QQ界面聊天小项目，可在线聊天！

绝地灬酷狼 2023-01-10 10:21 90阅读 0赞

1.功能实现

1.修改功能（密码、昵称、个性签名）

2.添加好友、删除好友

3.单聊功能

4.判断好友是否在线

# 2.模块划分 #

![图片][format_png]

# 3.使用的知识 #

*  netty
 *  swing
 *  集合等同步阻塞队列synchronousQueue
 *  数据库MySQL中的CRUD
 *  C3p0连接池
 *  JSON字符串

# 4.部分代码实现 #

1.nettyController.java

*  接收到来自客户端的消息，与dao层进行交互
 *  dao层与之数据库进行交互

修改密码

![图片][format_png 1]

添加好友

![图片][format_png 2]

从添加好友逻辑实现上我走了很多的弯路频繁的访问数据库，这是一件很不好的事情

package chat.Project.controller;
    import chat.Project.bean.information;
    import chat.Project.constant.EnMsgType;
    import chat.Project.dao.*;
    import chat.utils.CacheUtil;
    import chat.utils.JsonUtils;
    import com.fasterxml.jackson.databind.node.ObjectNode;
    import io.netty.channel.Channel;
    import java.util.ArrayList;
    import java.util.Iterator;
    public class NettyController {
        private static UserDao userDao = new UserDaoImpl();
        private static informationDao informationDao = new informationDaoImpl();
        private static friendDao friendDao = new friendDaoImpl();
        public static String processing(String message, Channel channel){
            //解析客户端发送的消息
            ObjectNode jsonNodes = JsonUtils.getObjectNode(message);
            String msgtype = jsonNodes.get("msgtype").asText();
            if (EnMsgType.EN_MSG_LOGIN.toString().equals(msgtype)){
                //登录操作
                return loginOperation(jsonNodes,channel);
            }else if (EnMsgType.EN_MSG_MODIFY_SIGNATURE.toString().equals(msgtype)){
                //修改签名
                return modifySignature(jsonNodes);
            }else if (EnMsgType.EN_MSG_MODIFY_NICKNAME.toString().equals(msgtype)){
                //修改昵称
                return modifyNickname(jsonNodes);
            }else if (EnMsgType.EN_MSG_GETINFORMATION.toString().equals(msgtype)){
                //获取登录信息
                return getInformation(jsonNodes);
            }else if (EnMsgType.EN_MSG_VERIFY_PASSWORD.toString().equals(msgtype)){
                //进行修改密码
                return verifyPasswd(jsonNodes);
            }else if (EnMsgType.EN_MSG_CHAT.toString().equals(msgtype)){
                //单聊模式
                return SingleChat(jsonNodes);
            }else if (EnMsgType.EN_MSG_GET_ID.toString().equals(msgtype)){
                //获取id
                return getId(jsonNodes);
            }else if (EnMsgType.EN_MSG_GET_FRIEND.toString().equals(msgtype)){
                //获取好友列表
                return getFriend(jsonNodes);
            }else if (EnMsgType.EN_MSG_ADD_FRIEND.toString().equals(msgtype)){
                //添加好友
                return addFriends(jsonNodes);
            }else if (EnMsgType.EN_MSG_DEL_FRIEND.toString().equals(msgtype)){
                //删除好友
                return delFriend(jsonNodes);
            }else if (EnMsgType.EN_MSG_ACTIVE_STATE.toString().equals(msgtype)){
                //判断好友的在线状态
                return friendIsActive(jsonNodes);
            }
            return "";
        }
        //判断好友在线状态
        private static String friendIsActive(ObjectNode jsonNodes) {
            int friendId = jsonNodes.get("friendId").asInt();
            ObjectNode objectNode = JsonUtils.getObjectNode();
            objectNode.put("msgtype",EnMsgType.EN_MSG_ACK.toString());
            objectNode.put("srctype",EnMsgType.EN_MSG_ACTIVE_STATE.toString());
            //客户端保证用户独立存在且是好友
            Channel channel = CacheUtil.get(friendId);
            //判断用户是否在线
            if (channel == null){
                //用户不在线
                objectNode.put("code",200);
            }else {
                //用户在线
                objectNode.put("code",300);
            }
            return objectNode.toString();
        }
        //添加好友
        private static String delFriend(ObjectNode jsonNodes) {
            Integer friendId = jsonNodes.get("friendId").asInt();
            int userId = jsonNodes.get("id").asInt();
            String localName = jsonNodes.get("localName").asText();
            //封装发回客户端的JSON
            ObjectNode objectNode = JsonUtils.getObjectNode();
            objectNode.put("msgtype",EnMsgType.EN_MSG_ACK.toString());
            objectNode.put("srctype",EnMsgType.EN_MSG_DEL_FRIEND.toString());
            objectNode.put("code",200);
            //验证是否存在当前好友
            information information = informationDao.getInformation(friendId);
            String friendName = information.getNickname();
            //查询自己是否有该好友
            boolean exist = friendDao.isExist(friendName,userId);
            if (exist){
                //存在当前好友进行删除操作
                friendDao.delFriend(userId,friendName);
                friendDao.delFriend(friendId,localName);
                objectNode.put("code",300);
            }
            return objectNode.toString();
        }
        //添加好友
        private static String addFriends(ObjectNode jsonNodes) {
            Integer friendId = jsonNodes.get("friendId").asInt();
            int userId = jsonNodes.get("id").asInt();
            String localName = jsonNodes.get("localName").asText();
            //验证是否有ID
            boolean exists = userDao.verifyExistFriend(friendId);
            ObjectNode objectNode = JsonUtils.getObjectNode();
            objectNode.put("msgtype",EnMsgType.EN_MSG_ACK.toString());
            objectNode.put("srctype",EnMsgType.EN_MSG_ADD_FRIEND.toString());
            objectNode.put("code",200);
            if(exists){
                //表示存在此id
                objectNode.put("code",300);
                //获取好友昵称
                information information = informationDao.getInformation(friendId);
                String friendNickname = information.getNickname();
                //进行添加好友的操作   两个对应的信息都应该添加
                friendDao.addFriends(userId,localName,friendNickname);
                friendDao.addFriends(friendId,friendNickname,localName);
            }
            return objectNode.toString();
        }
        //获取好友列表
        private static String getFriend(ObjectNode jsonNodes) {
            int uid = jsonNodes.get("uid").asInt();
            //返回ArrayLis集合
            ArrayList<String> friends = friendDao.getFriends(uid);
            //封装JSON
            ObjectNode objectNode = JsonUtils.getObjectNode();
            objectNode.put("msgtype",EnMsgType.EN_MSG_ACK.toString());
            objectNode.put("srctype",EnMsgType.EN_MSG_GET_FRIEND.toString());
            //写回friend集合
            Iterator<String> iterator = friends.iterator();
            int i = 0;
            while (iterator.hasNext()){
                objectNode.put("res"+i,iterator.next());
                i++;
            }
            //记录好友个数
            objectNode.put("count",i);
            return objectNode.toString();
        }
        //获取id
        private static String getId(ObjectNode jsonNodes) {
            String nickname = jsonNodes.get("nickname").asText();
            information information = informationDao.nicknameGetId(nickname);
            //联系人的id
            int uid = information.getUid();
            //封装JSON
            ObjectNode objectNode = JsonUtils.getObjectNode();
            objectNode.put("msgtype",EnMsgType.EN_MSG_ACK.toString());
            objectNode.put("srctype",EnMsgType.EN_MSG_GET_ID.toString());
            objectNode.put("uid",uid);
            return objectNode.toString();
        }
        //单聊模式
        private static String SingleChat(ObjectNode jsonNodes) {
            int id = jsonNodes.get("id").asInt();
            //根据id在friend表获取登录用户名
            //封装JSON数据服务端转发数据
            ObjectNode objectNode = JsonUtils.getObjectNode();
            objectNode.put("msgtype",EnMsgType.EN_MSG_ACK.toString());
            objectNode.put("srctype",EnMsgType.EN_MSG_CHAT.toString());
            //客户端保证用户独立存在且是好友
            Channel channel = CacheUtil.get(id);
            //判断用户是否在线
            if (channel == null){
                //用户不在线
                objectNode.put("code",200);
            }else{
                //用户在线
                objectNode.put("code",300);
                //消息转发
                channel.writeAndFlush(jsonNodes.toString());
            }
            return objectNode.toString();
        }
        //修改密码
        private static String verifyPasswd(ObjectNode jsonNodes) {
            int id = jsonNodes.get("id").asInt();
            String oldPasswd = jsonNodes.get("oldPasswd").asText();
            String newPasswd = jsonNodes.get("newPasswd").asText();
            boolean exits = userDao.verifyPassword(oldPasswd, id);
            ObjectNode objectNode = JsonUtils.getObjectNode();
            objectNode.put("msgtype",EnMsgType.EN_MSG_VERIFY_PASSWORD.toString());
            objectNode.put("code",200);
            if (exits){
                //验证成功
                userDao.modifyPasswd(newPasswd,id);
                objectNode.put("code",300);
            }
            return objectNode.toString();
        }
        //获取信息
        private static String getInformation(ObjectNode jsonNodes) {
            int id = jsonNodes.get("id").asInt();
            information information = informationDao.getInformation(id);
            //封装JSON发回客户端
            ObjectNode objectNode = JsonUtils.getObjectNode();
            objectNode.put("msgtype",EnMsgType.EN_MSG_ACK.toString());
            objectNode.put("srctype",EnMsgType.EN_MSG_GETINFORMATION.toString());
            objectNode.put("Nickname",information.getNickname());
            objectNode.put("Signature",information.getSignature());
            return objectNode.toString();
        }
        //修改昵称
        private static String modifyNickname(ObjectNode jsonNodes) {
            int id = jsonNodes.get("id").asInt();
            String nickname = jsonNodes.get("nickname").asText();
            //进行存储
            informationDao.storeNickname(nickname,id);
            return "";
        }
        //修改签名
        private static String modifySignature(ObjectNode jsonNodes) {
            int id = jsonNodes.get("id").asInt();
            String signature = jsonNodes.get("signature").asText();
            //进行存储
            informationDao.storeSignature(signature,id);
            return "";
        }
        //登录操作
        private static String loginOperation(ObjectNode objectNode,Channel channel) {
            int id = objectNode.get("id").asInt();
            String passwd = objectNode.get("passwd").asText();
            //进行数据库查询
            boolean exits = userDao.getInformation(id, passwd);
            ObjectNode jsonNodes = JsonUtils.getObjectNode();
            jsonNodes.put("msgtype",EnMsgType.EN_MSG_ACK.toString());
            jsonNodes.put("srctype",EnMsgType.EN_MSG_LOGIN.toString());
            jsonNodes.put("code",300);
            //返回状态码
            if (exits){
                jsonNodes.put("code",200);
                //添加用户的在线信息
                CacheUtil.put(id,channel);
            }
            return jsonNodes.toString();
        }
    }

2.ClientHandler.java

客户端接受来自服务端返回的消息

根据返回的状态码来判断是否操作成功

package chat.Project.netty;
    import chat.Frame.chat.ChatFrame;
    import chat.Frame.chat.linkmen;
    import chat.Frame.chat.login;
    import chat.Project.constant.EnMsgType;
    import chat.util.JsonUtils;
    import com.fasterxml.jackson.databind.node.ObjectNode;
    import io.netty.channel.ChannelHandlerContext;
    import io.netty.channel.SimpleChannelInboundHandler;
    import java.util.concurrent.SynchronousQueue;
    public class ClientHandler extends SimpleChannelInboundHandler<String> {
        //定义一个同步阻塞队列状态码
        public static SynchronousQueue<Object> queue = new SynchronousQueue<>();
        public static String Nickname;
        public String Signature;
        @Override
        protected void channelRead0(ChannelHandlerContext channelHandlerContext, String s) throws Exception {
        }
        //客户端接收数据
        @Override
        public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
            System.out.println(msg);
            //解析服务端发送的消息
            ObjectNode jsonNodes = JsonUtils.getObjectNode((String) msg);
            String msgtype = jsonNodes.get("msgtype").asText();
            if (EnMsgType.EN_MSG_ACK.toString().equals(msgtype)) {
                String srctype = jsonNodes.get("srctype").asText();
                if (EnMsgType.EN_MSG_LOGIN.toString().equals(srctype)) {
                    //登录操作
                    queue.offer(jsonNodes.get("code").asInt());
                }else if(EnMsgType.EN_MSG_GETINFORMATION.toString().equals(srctype)){
                    //存取信息
                     Nickname = jsonNodes.get("Nickname").asText();
                     Signature = jsonNodes.get("Signature").asText();
                    linkmen.label_1.setText(Nickname);
                    linkmen.field.setText(Signature);
                }else if (EnMsgType.EN_MSG_CHAT.toString().equals(srctype)){
                    //发送端返回消息
                    queue.offer(jsonNodes.get("code").asInt());
                }else if (EnMsgType.EN_MSG_GET_ID.toString().equals(srctype)){
                    int uid = jsonNodes.get("uid").asInt();
                    queue.offer(uid);
                }else if (EnMsgType.EN_MSG_GET_FRIEND.toString().equals(srctype)){
                    //获取登录用户的好友
                    int count = jsonNodes.get("count").asInt();
                    login.friend = new String[count];
                    for ( int i = 0;i<count;i++){
                        login.friend[i] = jsonNodes.get("res"+i).asText();
                        System.out.println(jsonNodes.get("res"+i));
                    }
                }else if (EnMsgType.EN_MSG_ADD_FRIEND.toString().equals(srctype)){
                    //添加好友
                    queue.offer(jsonNodes.get("code").asInt());
                }else if (EnMsgType.EN_MSG_DEL_FRIEND.toString().equals(srctype)){
                    //删除好友
                    queue.offer(jsonNodes.get("code").asInt());
                }else if (EnMsgType.EN_MSG_ACTIVE_STATE.toString().equals(srctype)){
                    //好友在线状态
                    queue.offer(jsonNodes.get("code").asInt());
                }
            }else if (EnMsgType.EN_MSG_VERIFY_PASSWORD.toString().equals(msgtype)){
                //修改密码
                int code = 0;
                code = jsonNodes.get("code").asInt();
                queue.offer(code);
            }else if (EnMsgType.EN_MSG_CHAT.toString().equals(msgtype)){
                //接收端接受消息  封装朋友昵称
                String message = " "+ jsonNodes.get("message").asText();
                //聊天显示框读取消息
                ChatFrame.sb.append(message+"n");
                ChatFrame.displayTextPanel.setText(ChatFrame.sb.toString());
            }
        }
    }

3.linkmen.java

这是登录成功的界面

package chat.Frame.chat;
    import chat.Frame.operation.alterColumn.changeNickname;
    import chat.Frame.operation.alterColumn.changePassword;
    import chat.Frame.operation.alterColumn.changeSignature;
    import chat.Frame.operation.friendHandle.addFriend;
    import chat.Frame.operation.friendHandle.delFriend;
    import chat.Frame.tipFrame;
    import chat.Project.services.sendServers;
    import io.netty.channel.Channel;
    import javax.swing.*;
    import javax.swing.event.ListSelectionEvent;
    import javax.swing.event.ListSelectionListener;
    import java.awt.*;
    import java.awt.event.ItemEvent;
    import java.awt.event.ItemListener;
    /**
     * 联系人界面
     */
    public class linkmen extends JFrame {
        //容器
        private JFrame frame;
        //标签
        private JLabel  label_2, label_3, label_4, label;
        //昵称
        public static JLabel label_1;
        //状态框
        private JComboBox box, box_1, box_2;
        //图片
        private ImageIcon icon_1, icon;
        //文本
        private JTextField  field_1;
        //个性签名
        public static JTextField field;
        //面板
        private JPanel panel_1, panel_3, panel;
        //滚动面板
        public JScrollPane panel_2;
        //列表
        public static JList list;
        //与服务端通信的通道
        private Channel channel;
        //用户的id
        private Integer id;
        //暂存oldPasswd
        public static JLabel label_5,label_6;
        //好友列表数组
        private String[] fd;
        //列表
        public static DefaultListModel<String> model;
        public linkmen(Integer id, Channel channel,String[] fd) {
            this.id = id;
            this.channel = channel;
            this.fd = fd;
        }
        public void init() {
            //初始化面板1并设置信息
            panel_1 = new JPanel();
            panel_1.setLayout(null);
            panel_1.setLocation(0, 0);
            panel_1.setBorder(BorderFactory.createTitledBorder("资料卡"));
            panel_1.setSize(new Dimension(295, 148));
            panel_1.setOpaque(false);
            //初始化面板3并设置信息
            panel_3 = new JPanel();
            panel_3.setLayout(null);
            panel_3.setBorder(BorderFactory.createTitledBorder("系统设置"));
            panel_3.setLocation(0, 617);
            panel_3.setSize(new Dimension(295, 55));
            panel_3.setOpaque(false);
            //设置头像标签
            label_2 = new JLabel(new ImageIcon("E:聊天软件untitledsrcimageSource4.png"));
            label_2.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));
            label_2.setBounds(15, 15, 100, 100);
            panel_1.add(label_2);
            //初始暂存标签
            label_5 = new JLabel();
            label_6 = new JLabel();
            //设置昵称标签
            label_1 = new JLabel("");
            label_1.setBounds(130, 10, 100, 30);
            label_1.setFont(new Font("宋体", Font.PLAIN, 18));
            panel_1.add(label_1);
            list = new JList<String>(model);
            //设置每个列表的高
            list.setFixedCellHeight(20);
            list.setSelectionBackground(new Color(0xD8FF2F));
            list.addListSelectionListener(new ListSelectionListener() {
                @Override
                public void valueChanged(ListSelectionEvent e) {
                    //打开一个聊天窗口
                    if (e.getValueIsAdjusting()) {
                        for (int i = 0; i < model.size(); i++) {
                            if (model.get(i).equals(list.getSelectedValue())){
                                //获取id有错误
                                int ids = new sendServers(channel).getId((String) list.getSelectedValue());
                                if (ids!=0) {
                                    new sendServers(channel).friendIsActive(ids);
                                    new ChatFrame(ids, channel).setVisible(true);
                                }else{
                                    System.out.println("好友不存在");
                                }
                            }
                        }
                    }
                }
            });
            //初始化面板二
            panel_2 = new JScrollPane(list);
            panel_2.setBorder(BorderFactory.createTitledBorder("联系人"));
            panel_2.setLocation(0, 147);
            panel_2.setSize(new Dimension(295, 470));
            panel_2.getViewport().setOpaque(false);
            list.setOpaque(false);
            panel_2.setOpaque(false);
            //设置在线状态bBox();
            box = new JComboBox();
            box.addItem("✅在线");
            box.addItem("uD83DuDCBF隐身");
            box.addItem("uD83DuDCBB忙碌");
            box.addItem("❎离线");
            box.setBounds(200, 10, 70, 30);
            panel_1.add(box);
            //设置个性签名的标签
            label_4 = new JLabel("个性签名:");
            label_4.setFont(new Font("宋体", Font.PLAIN, 16));
            label_4.setForeground(Color.BLUE);
            label_4.setBounds(120, 50, 100, 20);
            panel_1.add(label_4);
            //设置文本
            field = new JTextField("");
            field.setBounds(120, 80, 160, 30);
            panel_1.add(field);
            label_3 = new JLabel("uD83DuDD0D");
            label_3.setForeground(Color.RED);
            label_3.setBounds(10, 122, 20, 20);
            panel_1.add(label_3);
            //设置搜索栏
            field_1 = new JTextField();
            field_1.setBounds(30, 120, 250, 25);
            panel_1.add(field_1);
            //对面板三进行初始化
            box_1 = new JComboBox();
            box_1.addItem("uD83DuDD12uD83DuDD28uD83DuDD13");
            box_1.addItem("修改密码");
            box_1.addItem("修改昵称");
            box_1.addItem("修改签名");
            box_1.setBounds(8, 20, 100, 25);
            panel_3.add(box_1);
            box_1.addItemListener(new ItemListener() {
                @Override
                public void itemStateChanged(ItemEvent e) {
                    if ("修改签名".equals(box_1.getSelectedItem())) {
                        //执行一次
                        if (e.getStateChange() == ItemEvent.SELECTED) {
                            changeSignature changeSignature = new changeSignature(linkmen.this);
                            changeSignature.setVisible(true);
                            field.setText(changeSignature.jTextField.getText());
                            String signature = field.getText();
                            //存储签名的方法
                            new sendServers(channel).modifySignature(signature, id);
                        }
                    }
                    if ("修改密码".equals(box_1.getSelectedItem())) {
                        if (e.getStateChange() == ItemEvent.SELECTED) {
                            changePassword changePassword = new changePassword(linkmen.this);
                            changePassword.setVisible(true);
                            label_5.setText(changePassword.oldPassword.getText());
                            String oldPasswd = label_5.getText();
                            label_6.setText(new String(changePassword.newPassword.getPassword()));
                            String newPasswd = label_6.getText();
                            //进行验证
                            new sendServers(channel).verifyPasswd(oldPasswd, id,newPasswd);
                        }
                    }
                    if ("修改昵称".equals(box_1.getSelectedItem())) {
                        if (e.getStateChange() == ItemEvent.SELECTED) {
                            changeNickname changeNickname = new changeNickname(linkmen.this);
                            changeNickname.setVisible(true);
                            label_1.setText(changeNickname.jTextField.getText());
                            String nickname = label_1.getText();
                            //存储昵称
                            new sendServers(channel).modifyNickname(nickname, id);
                        }
                    }
                }
            });
            //添加好友、删除好友
            box_2 = new JComboBox();
            box_2.addItem("uD83DuDC65");
            box_2.addItem("添加好友");
            box_2.addItem("删除好友");
            box_2.setBounds(170, 20, 100, 25);
            box_2.addItemListener(new ItemListener() {
                @Override
                public void itemStateChanged(ItemEvent e) {
                    if ("添加好友".equals(box_2.getSelectedItem())) {
                        if (e.getStateChange() == ItemEvent.SELECTED) {
                            addFriend addFriend = new addFriend(linkmen.this);
                            addFriend.setVisible(true);
                            //读取要搜索的ID
                            String friendIds = addFriend.jTextField.getText();
                            //判断是否是字符串
                            if (judgeDigit(friendIds)){
                                int friendId = Integer.parseInt(friendIds);
                                //搜索数据库
                                new sendServers(channel).addFriendOperate(friendId,id,label_1.getText());
                            }else {
                                new tipFrame().init("输入参数错误");
                            }
                        }
                    }
                    if ("删除好友".equals(box_2.getSelectedItem())) {
                        if (e.getStateChange() == ItemEvent.SELECTED) {
                            delFriend delFriend = new delFriend(linkmen.this);
                            delFriend.setVisible(true);
                            //对其数据库进行删除操作
                            String friendIds = delFriend.TextField.getText();
                            //判断是否是字符串
                            if(judgeDigit(friendIds)){
                                int friendId = Integer.parseInt(friendIds);
                                //操作数据库
                                new sendServers(channel).delFriendOperate(friendId,id,label_1.getText());
                            }else{
                                new tipFrame().init("输入参数错误");
                            }
                        }
                    }
                }
            });
            panel_3.add(box_2);
            //设置frame信息
            frame = new JFrame();
            //设置窗体信息
            frame.setTitle("腾讯QQ");
            //给窗体设置图片
            icon_1 = new ImageIcon("E:聊天软件untitledsrcimageSource3.png");
            frame.setIconImage(icon_1.getImage());
            icon = new ImageIcon("E:聊天软件untitledsrcimageSource5.png");
            label = new JLabel(icon);
            //获取窗口的第二层，将label放入
            frame.getLayeredPane().add(label, new Integer(Integer.MIN_VALUE));
            //获取frame的顶层容器,并设置为透明
            panel = (JPanel) frame.getContentPane();
            panel.setOpaque(false);
            frame.setLayout(null);
            frame.setLocation(750, 150);
            frame.setSize(287, 700);
            frame.setVisible(true);
            frame.setResizable(false);
            label.setBounds(0, 0, 287, 700);
            frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
            frame.add(panel_1);
            frame.add(panel_2);
            frame.add(panel_3);
        }
        public void mian() {
            //初始化面板2并设置信息
            model = new DefaultListModel<>();
            for (int i = 0; i < fd.length; i++) {
                model.addElement(fd[i]);
            }
            init();
            //更新昵称和签名
            new sendServers(channel).update(id);
            //获取用户的昵称,和好友列表
            //设置签名和昵称字体初始样式和大小
            label_1.setFont(new Font("宋体", Font.PLAIN, 18));
            field.setFont(new Font("宋体", Font.PLAIN, 18));
        }
        //判断是否是数字
        private static boolean judgeDigit(String string){
            for (int i = 0; i < string.length(); i++) {
                if (!Character.isDigit(string.charAt(i))){
                    return false;
                }
            }
            return true;
        }
    }

4.tipFrame

提示操作状态窗口

package chat.Frame;
    import chat.Frame.chat.linkmen;
    import chat.Frame.operation.alterColumn.changeNickname;
    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    public class tipFrame extends JDialog {
        private Container container;
        //显示错误信息
        public JLabel label;
        //确认按钮
        private JButton button;
        public tipFrame(){
        }
        public void init(String msg){
            container = getContentPane();
            label = new JLabel(msg);
            label.setBounds(70,0,200,70);
            label.setFont(new Font("微软雅黑",Font.PLAIN,20));
            container.add(label);
            button = new JButton("确认");
            button.setBounds(35,50,140,40);
            container.add(button);
            setBounds(780,170,220,140);
            setLayout(null);
            setVisible(true);
            container.setBackground(new Color(0xD8FFD5));
            //提示窗口前置
            setAlwaysOnTop(true);
            button.addActionListener(new ActionListener() {
                @Override
                public void actionPerformed(ActionEvent e) {
                    tipFrame.this.dispose();
                }
            });
        }
    }

# 5.运行例图 #

1.登录界面

![图片][format_png 3]

注册账号和忘记密码没有添加事件现在就是个摆设

–

## 2.联系人界面 ##

![图片][format_png 4]

这里面的所有功能都可以使用

–

## 3.聊天界面 ##

![图片][format_png 5]

这个里面表情按钮没弄好

## 4.通信的过程 ##

![图片][format_png 6]

## 5.修改操作 ##

![图片][format_png 7]

## 6.好友的操作 ##

![图片][format_png 8]

### 项目推荐： ###

**[2000多G的计算机各行业电子资源分享（持续更新）][2000_G]**

**[2020年微信小程序全栈项目之喵喵交友【附课件和源码】][2020]**

**[Spring Boot开发小而美的个人博客【附课件和源码】][Spring Boot]**

**[Java微服务实战296集大型视频-谷粒商城【附代码和课件】][Java_296_-]**

**[Java开发微服务畅购商城实战【全357集大项目】-附代码和课件][Java_357_-]**

**[最全最详细数据结构与算法视频-【附课件和源码】][-]**

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNTg3NTc1_size_16_color_FFFFFF_t_70_pic_center]

[format_png]: /images/20221119/63ca6a47c8d04f2997819339143bd925.png
[format_png 1]: /images/20221119/db1cda96e01b4a168a02e6df3b484966.png
[format_png 2]: https://img-blog.csdnimg.cn/img_convert/58062c6300ca939a583c089a2aa3a878.webp?x-oss-process=image/format,png
[format_png 3]: https://img-blog.csdnimg.cn/img_convert/f95d61624437c78228ac2bfa36f1c906.webp?x-oss-process=image/format,png
[format_png 4]: https://img-blog.csdnimg.cn/img_convert/2d2d1ec90a9c2637e126baa5e8f70765.webp?x-oss-process=image/format,png
[format_png 5]: https://img-blog.csdnimg.cn/img_convert/3f9f7762b0b3064def13676ca8bc1a00.webp?x-oss-process=image/format,png
[format_png 6]: https://img-blog.csdnimg.cn/img_convert/b0051f612eb9d0249bafe554441b70bb.webp?x-oss-process=image/format,png
[format_png 7]: https://img-blog.csdnimg.cn/img_convert/8e2c3175e870d93450d830eff2e81542.webp?x-oss-process=image/format,png
[format_png 8]: https://img-blog.csdnimg.cn/img_convert/b6fc21dbd592bb8bdf2a2ce0b979127b.webp?x-oss-process=image/format,png
[2000_G]: https://mp.weixin.qq.com/s/sP4JgGWkCzpgwKr9sAV2_Q
[2020]: https://mp.weixin.qq.com/s?__biz=MzIyNTI3NDQ4NQ==&mid=2247487704&idx=1&sn=5f4b2127c4d49fd07ae072a0721424a2&chksm=e8036fc2df74e6d489c4aa9b06f917ef7cee6027f13e150fca53cf79d5d188d4ccc1af49e098&scene=21#wechat_redirect
[Spring Boot]: https://mp.weixin.qq.com/s?__biz=MzIyNTI3NDQ4NQ==&mid=2247487798&idx=2&sn=ac0293b996521b872a9dba5fbb3e65e6&chksm=e8036e2cdf74e73aba104a9a994a5b2e31483e8dcbe0f1d9936f6d5173b887e1560f59d2819c&scene=21#wechat_redirect
[Java_296_-]: https://mp.weixin.qq.com/s?__biz=MzIyNTI3NDQ4NQ==&mid=2247487674&idx=1&sn=7aff0bdf2bb727303f3d3618995aef21&chksm=e8036fa0df74e6b6d872c7e6ece179c524ed463a4a6b74c96875475c9a3d5ddb903427dd993b&scene=21#wechat_redirect
[Java_357_-]: https://mp.weixin.qq.com/s?__biz=MzIyNTI3NDQ4NQ==&mid=2247486376&idx=1&sn=d1fef270c463ea8ac663f6fbfedd70a0&chksm=e80374b2df74fda4d3bafba878a106a19e18c5fcda266008f4f37975847a21bc612ffcd5ff39&scene=21#wechat_redirect
[-]: https://mp.weixin.qq.com/s?__biz=MzIyNTI3NDQ4NQ==&mid=2247487750&idx=1&sn=747bccbb5f5ea6b58915198de40da777&chksm=e8036e1cdf74e70ae97a5e8e265b49d7236d904d291203309159d07ba1724033062c0e370843&scene=21#wechat_redirect
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNTg3NTc1_size_16_color_FFFFFF_t_70_pic_center]: https://img-blog.csdnimg.cn/20210105230611623.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQwNTg3NTc1,size_16,color_FFFFFF,t_70#pic_center