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来源：blog.csdn.net/weixin_44048140

一. 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

二. 模块划分

三. 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

四. 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

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idreturn 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JSONObjectNode 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IDboolean 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idobjectNode.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JSONObjectNode 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idprivate static String getId(ObjectNode jsonNodes) {String nickname = jsonNodes.get("nickname").asText();information information = informationDao.nicknameGetId(nickname);//联系人的idint uid = information.getUid();//封装JSONObjectNode 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;@Overrideprotected void channelRead0(ChannelHandlerContext channelHandlerContext, String s) throws Exception {}//客户端接收数据@Overridepublic 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idprivate Integer id;//暂存oldPasswdpublic 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() {@Overridepublic 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() {@Overridepublic 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() {@Overridepublic 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IDString 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() {@Overridepublic void actionPerformed(ActionEvent e) {tipFrame.this.dispose();}});}
}

五. 运行例图

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

2. 联系人界面

这里面的所有功能都可以使用

3. 聊天界面

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

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