java聊天界面及实现聊天功能（用Java写了一个类QQ界面聊天小项目）

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

• 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

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

添加好友

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\\untitled\\src\\imageSource\\4.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("\uD83D\uDCBF隐身"); box.addItem("\uD83D\uDCBB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("\uD83D\uDD0D"); 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("\uD83D\uDD12\uD83D\uDD28\uD83D\uDD13"); 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("\uD83D\uDC65"); 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\\untitled\\src\\imageSource\\3.png"); frame.setIconImage(icon_1.getImage()); icon = new ImageIcon("E:\\聊天软件\\untitled\\src\\imageSource\\5.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(); } }); } }

1.登录界面

注册账号和忘记密码没有添加事件现在就是个摆设

这里面的所有功能都可以使用

这个里面表情按钮没弄好

4.通信的过程

5.修改操作

6.好友的操作

另外还整理成了40多套PDF文档：全套的Java面试宝典手册，“性能调优 微服务架构 并发编程 开源框架 分布式”等七大面试专栏，包含Tomcat、JVM、MySQL、SpringCloud、SpringBoot、Dubbo、并发、Spring、SpringMVC、MyBatis、Zookeeper、Ngnix、Kafka、MQ、Redis、MongoDB、memcached等等。如果你对这个感兴趣，小编可以免费分享。

资料获取方式：关注小编 转发文章 私信【面试题】获取上述资料~

重要的事情说三遍，转发 转发 转发，一定要记得转发哦！！！