服务器之家:专注于服务器技术及软件下载分享
分类导航

PHP教程|ASP.NET教程|Java教程|ASP教程|编程技术|正则表达式|C/C++|IOS|C#|Swift|Android|VB|R语言|JavaScript|易语言|vb.net|

服务器之家 - 编程语言 - Java教程 - java实现多人聊天工具(socket+多线程)

java实现多人聊天工具(socket+多线程)

2021-12-07 13:02Henrik-Yao Java教程

这篇文章主要为大家详细介绍了java实现多人聊天工具,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

大一下学期的java期末课程设计:java实现多人聊天工具,分享一下

课设要求

多人聊天工具

  • 服务器要求1:能够看到所有在线用户(25%)
  • 服务器要求2:能够强制用户下线(25%)
  • 客户端要求1:能够看到所有在线用户(25%)
  • 客户端要求2:能够向某个用户发送消息(25%)

相关知识点

1.服务端能够看到所有在线用户

服务端继承了JFrame,实现可视化,通过socket实现服务端与客户端的连接,服务端每接收一个连接,把传进来的用户名和对应的socket连接封装成一个User对象,把User对象存进一个ArrayList的用户列表并把User对象通过取用户名方法取得用户名存进一个ArrayList的用户名列表,添加一个JPanel组件,将ArrayList中的内容通过循环显示JPanel中并布局在窗体的右边,在每当有人上线或者下线,刷新JPanel组件。

2.服务端能够强制用户下线

创建一个布局在窗体的下方的JPanel,在此JPanel中分别添加JLabel用于显示提示文字,添加JTextField用于获取服务端想要强制用户下线的ID,添加JButton用于绑定强制用户下线的事件监听,事件监听中将获取的JTextField的内容与用户名列表进行逐一匹配,匹配上则创建JSON格式的键值对对象,通过用户列表循环广播告知其他用户,并在用户列表和用户名列表中分别删除该用户信息。

3.客户端能够看到所有在线用户

客户端继承了JFrame,实现可视化,添加了一个布局在窗口右边的JPanel,把从服务端接收到的用户名列表中的信息放进去。

4.客户端要求能够向某个用户发送消息

客户端私发消息通过在消息后面加入-和目标用户名,传给服务端,服务端截取目标用户名,在用户名列表中判断是否存在此人,有则判断是否是私发,私发则向目标用户发送消息,没有则向全部用户发送消息。

5.运用JDBC实现持久化存储用户信息

数据库连接池运用了阿里巴巴的durid,定义一个JDBCUtils类,提供静态代码块加载配置文件,初始化连接池对象,通过Spring框架的JDBCTemplate对象进行sql语句的执行,在UserDao中提供了登录和注册方法,登录方法运用queryForObject方法进行登录查询,如果查到返回一个User对象,查不到则返回空,注册方法直接插入新记录,此处建表语句中把用户名设置成了主键,保证了用户名的唯一性,注册失败有警告弹窗提示。
这里加了一个ChatTest类用于绕过数据库账号校验,可以直接进入客户端进行连接。

6.使用JSONObject对象封装数据

在数据的传输中运用了键值对的形式进行传输,客户端传输给服务端的数据包中,通过判断private键的值来确认是否私发,通过username键告知服务端客户端的用户名,通过msg键传输具体消息,服务端传输给客户端的数据包中,通过判断user_list键的值来确认在线用户及人数

7.使用Maven构建管理项目

项目中运用到了JDBC相关内容和JSONObject对象,导入了一些依赖jar包,其中仓库和配置文件都是用的idea默认配置。

类图

java实现多人聊天工具(socket+多线程)

项目框架

java实现多人聊天工具(socket+多线程)

核心代码

1.maven配置文件pom.xml

 

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
 
    <groupId>org.example</groupId>
    <artifactId>MyChat</artifactId>
    <version>1.0-SNAPSHOT</version>
 
    <properties>
        <maven.compiler.source>15</maven.compiler.source>
        <maven.compiler.target>15</maven.compiler.target>
    </properties>
 
    <dependencies>
        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.3</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.45</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.6</version>
        </dependency>
    </dependencies>
 
</project>

2.服务器端Server.java

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import java.util.*;
import java.awt.*;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.border.TitledBorder;
import net.sf.json.JSONObject;
 
 
//继承JFrame实现可视化
public class Server extends JFrame{
 
    //用户列表,用于存放连接上的用户信息
    ArrayList<User> user_list = new ArrayList<>();
    //用户名列表,用于显示已连接上的用户
    ArrayList<String> username_list = new ArrayList<>();
 
    //消息显示区域
    JTextArea show_area = new JTextArea();
    //用户名显示区域
    JTextArea show_user = new JTextArea(10, 10);
 
    //socket的数据输出流
    DataOutputStream outputStream = null;
    //socket的数据输入流
    DataInputStream inputStream = null;
 
    //从主函数里面开启服务端
    public static void main(String[] args) {
        new Server();
    }
 
    //构造函数
    public Server() {
 
        //设置流式布局
        setLayout(new BorderLayout());
        //VERTICAL_SCROLLBAR_AS_NEEDED设置垂直滚动条需要时出现
        //HORIZONTAL_SCROLLBAR_NEVER设置水平滚动条不出现
        //创建信息显示区的画布并添加到show_area
        JScrollPane panel = new JScrollPane(show_area,ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        //设置信息显示区标题
        panel.setBorder(new TitledBorder("信息显示区"));
        //布局到中央
        add(panel,BorderLayout.CENTER);
        //设置信息显示区为不可编辑
        show_area.setEditable(false);
 
 
        //创建用于显示用户的画布
        final JPanel panel_east = new JPanel();
        //添加流式布局
        panel_east.setLayout(new BorderLayout());
        //设置标题
        panel_east.setBorder(new TitledBorder("在线用户"));
        //在用户显示区添加show_uesr
        panel_east.add(new JScrollPane(show_user), BorderLayout.CENTER);
        //设置用户显示区域为不可编辑
        show_user.setEditable(false);
        //将显示用户的画布添加到整体布局的右侧
        add(panel_east, BorderLayout.EAST);
 
        //创建关于踢下线用户的画布
        final JPanel panel_south = new JPanel();
        //创建标签
        JLabel label = new JLabel("输入要踢下线用户的ID");
        //创建输入框
        JTextField out_area = new JTextField(40);
        //创建踢下线按钮
        JButton out_btn = new JButton("踢下线");
        //依次添加进画布
        panel_south.add(label);
        panel_south.add(out_area);
        panel_south.add(out_btn);
        //将踢下线用户的画布添加到整体布局的下侧
        add(panel_south,BorderLayout.SOUTH);
 
        //设置踢下线按钮的监听
        out_btn.addActionListener(e -> {
            try {
                //用于存储踢下线用户的名字
                String out_username;
                //从输入框中获取踢下线用户名
                out_username = out_area.getText().trim();
                //用于判断盖用户是否被踢下线
                boolean is_out=false;
                //遍历用户列表依次判断
                for (int i = 0; i < user_list.size(); i++){
                    //比较用户名,相同则踢下线
                    if(user_list.get(i).getUsername().equals(out_username)){
                        //获取被踢下线用户对象
                        User out_user = user_list.get(i);
                        //使用json封装将要传递的数据
                        JSONObject data = new JSONObject();
                        //封装全体用户名,广播至所有用户
                        data.put("user_list", username_list);
                        //广播的信息内容
                        data.put("msg", out_user.getUsername() + "被管理员踢出\n");
                        //服务端消息显示区显示相应信息
                        show_area.append(out_user.getUsername() + "被你踢出\n");
                        //依次遍历用户列表
                        for (User value : user_list) {
                            try {
                                //获取每个用户列表的socket连接
                                outputStream = new DataOutputStream(value.getSocket().getOutputStream());
                                //传递信息
                                outputStream.writeUTF(data.toString());
                            } catch (IOException ex) {
                                ex.printStackTrace();
                            }
                        }
                        //将被踢用户移出用户列表
                        user_list.remove(i);
                        //将被踢用户移出用户名列表
                        username_list.remove(out_user.getUsername());
                        //刷新在线人数
                        show_user.setText("人数有 " + username_list.size() + " 人\n");
                        //刷新在线用户
                        for (String s : username_list) {
                            show_user.append(s + "\n");
                        }
                        //判断踢出成功
                        is_out=true;
                        break;
                    }
 
                }
                //根据是否踢出成功弹出相应提示
                if(is_out){
                    JOptionPane.showMessageDialog(null,"踢下线成功","提示",
                            JOptionPane.WARNING_MESSAGE);
                }
                if(!is_out){
                    JOptionPane.showMessageDialog(null,"不存在用户","提示",
                            JOptionPane.WARNING_MESSAGE);
                }
                //重置输入框
                out_area.setText("");
            } catch(Exception ex) {
                ex.printStackTrace();
            }
        });
 
        //设置该窗口名
        setTitle("服务器 ");
        //引入图片
        BufferedImage img;
        try {
            //根据图片名引入图片
            img = ImageIO.read(Server.class.getResource("/a.jpg"));
            //设置其为该窗体logo
            setIconImage(img);
        } catch (IOException exception) {
            exception.printStackTrace();
        }
        //设置窗体大小
        setSize(700, 700);
        //设置窗体位置可移动
        setLocationRelativeTo(null);
        //设置窗体关闭方式
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //设置窗体可见
        setVisible(true);
 
        //socket连接相关代码
        try {
            //开启socket服务器,绑定端口11111
            ServerSocket serverSocket = new ServerSocket(11111);
            //信息显示区打印服务器启动时间
            show_area.append("服务器启动时间 " + new Date() + "\n");
            //持续接收连接
            while (true) {
                //接收连接
                Socket socket = serverSocket.accept();
                //创建用户对象
                User user = new User();
                //判断是否连接上
                if (socket != null) {
                    //获取输入流
                    inputStream = new DataInputStream(socket.getInputStream());
                    //读取输入流
                    String json = inputStream.readUTF();
                    //创建信息对象
                    JSONObject data = JSONObject.fromObject(json);
                    //信息显示区打印用户上线
                    show_area.append("用户 " + data.getString("username") + " 在" + new Date() + "登陆系统"+"\n");
                    //创建新用户
                    user = new User();
                    //存储socket对象
                    user.setSocket(socket);
                    //获取输入流用户名
                    user.setUsername(data.getString("username"));
                    //添加进用户列表
                    user_list.add(user);
                    //添加进用户名列表
                    username_list.add(data.getString("username"));
 
                    //刷新在线人数
                    show_user.setText("人数有 " + username_list.size() + " 人\n");
                    //刷新在线用户
                    for (String s : username_list) {
                        show_user.append(s + "\n");
                    }
 
                }
 
                //封装信息对象
                JSONObject online = new JSONObject();
                //设置接收信息对象
                online.put("user_list", username_list);
                //设置信息内容
                online.put("msg", user.getUsername() + "上线了");
                //依次遍历,将信息广播给所有在线用户
                for (User value : user_list) {
                    //获取输出流
                    outputStream = new DataOutputStream(value.getSocket().getOutputStream());
                    //给所有用户输出上线信息
                    outputStream.writeUTF(online.toString());
                }
 
                //开启新线程,持续接收该socket信息
                new Thread(new ServerThread(socket)).start();
 
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
 
    //线程代码
    class ServerThread implements Runnable {
        //存放全局变量socket
        private final Socket socket;
 
        //构造函数,初始化socket
        public ServerThread(Socket socket) {
            this.socket = socket;
        }
 
        @Override
        public void run() {
            try {
                //获取输入流
                DataInputStream inputStream = new DataInputStream(socket.getInputStream());
                //持续接收信息
                while (true) {
                    //获取传递进来的信息
                    String json = inputStream.readUTF();
                    //封装成json格式
                    JSONObject data = JSONObject.fromObject(json);
 
                    //通过json里面的private判断是否私发
                    boolean is_private = false;
                    //私发处理
                    for (int i = 0; i < user_list.size(); i++) {
                        //找到私发对象
                        if (user_list.get(i).getUsername().equals(data.getString("private"))) {
                            //构建私发信息内容
                            String msg = data.getString("time") +"\n" + data.getString("username")
                                    + " 给你发了一条私密消息,其它用户看不到" + "\n"  + data.getString("msg");
                            //用该方法指定对象发送信息
                            send_msg(i, msg);
 
                            //将发送成功反馈给原用户
                            for (int j = 0; j < user_list.size(); j++) {
                                //找到发信息用户
                                if(user_list.get(j).getUsername().equals(data.getString("username"))){
                                    //构建反馈信息内容
                                    String msg2 = data.getString("time")+"\n你成功向"+user_list.get(i).getUsername()
                                            +"发送了一条私密消息\n" +data.getString("msg");
                                    //用该方法指定对象发送信息
                                    send_msg(j,msg2);
                                }
                            }
                            //将该操作打印到服务器监视窗
                            show_area.append(data.getString("username") +data.getString("time")+ "私发给"
                                    + data.getString("private") + ":\n" + data.getString("msg") + "\n");
                            //判断是私发
                            is_private = true;
                            break;
                        }
                    }
                    //非私发的情况
                    if (!is_private) {
                        //构建信息内容
                        String msg = data.getString("username") + " " + data.getString("time") + ":\n"
                                + data.getString("msg");
                        //添加到服务器显示
                        show_area.append(msg + "\n");
                        //依次发给所有在线用户
                        for (int i = 0; i < user_list.size(); ) {
                            send_msg(i, msg);
                            i++;
                        }
                    }
 
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
 
 
        //发送信息给指定用户的方法
        public void send_msg(int i, String msg) {
            //构建对象
            JSONObject data = new JSONObject();
            //封装信息
            data.put("user_list", username_list);
            data.put("msg", msg);
            //获取目标对象
            User user = user_list.get(i);
            try {
                //获取输出流
                outputStream = new DataOutputStream(user.getSocket().getOutputStream());
                //写信息
                outputStream.writeUTF(data.toString());
            } catch (IOException e) {
                //如果没有找到,则说明该用户已经下线
                User out_user = user_list.get(i);
                //重复删除操作
                user_list.remove(i);
                username_list.remove(out_user.getUsername());
                //重新构建信息
                JSONObject out = new JSONObject();
                out.put("user_list", username_list);
                out.put("msg", out_user.getUsername() + "下线了\n");
                //将其下线通知广播给所有用户
                for (User value : user_list) {
                    try {
                        outputStream = new DataOutputStream(value.getSocket().getOutputStream());
                        outputStream.writeUTF(out.toString());
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
                }
            }
 
        }
    }
 
 
}

代码太多了,懒得注释了,大家应该看得懂

3.客户端登录界面Client.java

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
 
 
public class Client extends JFrame{
 
 
    public static void main(String[] args) {
        new Client();
    }
 
    public Client(){
        setTitle("登陆界面");
        BufferedImage img;
        try {
            img = ImageIO.read(Server.class.getResource("/a.jpg"));
            setIconImage(img);
        } catch (IOException exception) {
            exception.printStackTrace();
        }
        setLayout(null);
        setSize(500,500);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        setLayout(null);
        setResizable(false);
 
        JLabel username_label = new JLabel("用户名");
        username_label.setBounds(60,100,100,50);
        add(username_label);
 
        JLabel password_label = new JLabel("密码");
        password_label.setBounds(60,200,100,50);
        add(password_label);
 
        JTextField username_field = new JTextField();
        username_field.setBounds(110,100,300,50);
        add(username_field);
 
        JPasswordField password_field = new JPasswordField();
        password_field.setBounds(110,200,300,50);
        add(password_field);
 
        JButton login = new JButton("登陆");
        login.setBounds(130,300,100,50);
        add(login);
        JButton register = new JButton("注册");
        register.setBounds(280,300,100,50);
        add(register);
 
        setVisible(true);
 
 
        login.addActionListener(e -> {
            String username = username_field.getText();
            String password = String.valueOf(password_field.getPassword());
            if(username.length()!=0 && password.length()!=0){
                User user = new User();
                user.setUsername(username);
                user.setPassword(password);
                UserDao dao = new UserDao();
                User u = dao.login(user);
                if(u!=null){
                    setVisible(false);
                    new Chat(username);
                }else{
                    JOptionPane.showMessageDialog(null,"登录失败,账号或密码错误","提示",
                        JOptionPane.WARNING_MESSAGE);
                }
            }else {
                JOptionPane.showMessageDialog(null,"登录失败,账号或密码不能为空","提示",
                        JOptionPane.WARNING_MESSAGE);
            }
        });
 
        register.addActionListener(e -> {
            setVisible(false);
            new Register();
        });
    }
 
}

4.客户端注册界面Register.java

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
 
 
public class Register extends JFrame {
    public Register(){
        setTitle("注册界面");
        BufferedImage img;
        try {
            img = ImageIO.read(Server.class.getResource("/a.jpg"));
            this.setIconImage(img);
        } catch (IOException exception) {
            exception.printStackTrace();
        }
        setLayout(null);
        setSize(500,500);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        setLayout(null);
        setResizable(false);
 
        JLabel username_label = new JLabel("用户名");
        username_label.setBounds(60,50,100,50);
        add(username_label);
 
        JLabel password_label = new JLabel("密码");
        password_label.setBounds(60,150,100,50);
        add(password_label);
 
        JLabel password_label2 = new JLabel("请再次输入密码");
        password_label2.setBounds(20,250,100,50);
        add(password_label2);
 
        JTextField username_field = new JTextField();
        username_field.setBounds(110,50,300,50);
        add(username_field);
 
        JPasswordField password_field = new JPasswordField();
        password_field.setBounds(110,150,300,50);
        add(password_field);
 
        JPasswordField password_field2 = new JPasswordField();
        password_field2.setBounds(110,250,300,50);
        add(password_field2);
 
 
        JButton register_success = new JButton("注册");
        register_success.setBounds(130,350,100,50);
        add(register_success);
 
        JButton back = new JButton("返回");
        back.setBounds(280,350,100,50);
        add(back);
 
        setVisible(true);
 
 
        register_success.addActionListener(e -> {
            String username = username_field.getText();
            String password = String.valueOf(password_field.getPassword());
            String password2 = String.valueOf(password_field2.getPassword());
            System.out.println(password);
            System.out.println(password2);
            if(username.length()==0 || password.length()==0){
                JOptionPane.showMessageDialog(null,"注册失败,账号或密码不能为空","提示",
                        JOptionPane.WARNING_MESSAGE);
            }else if (!password.equals(password2)) {
                JOptionPane.showMessageDialog(null,"注册失败,前后密码不匹配","提示",
                        JOptionPane.WARNING_MESSAGE);
            }else{
                System.out.println();
                System.out.println(password);
                User user = new User();
                user.setUsername(username);
                user.setPassword(password);
                UserDao dao = new UserDao();
                int flag = dao.register(user);
                if(flag!=0){
                    JOptionPane.showMessageDialog(null,"注册成功,欢迎您登录","提示",
                            JOptionPane.WARNING_MESSAGE);
 
                }else{
                    //建表语句中设置了user为主键,重复则建表失败
                    JOptionPane.showMessageDialog(null,"注册失败,账号已经存在","提示",
                            JOptionPane.WARNING_MESSAGE);
                }
            }
        });
 
        back.addActionListener(e ->{
           setVisible(false);
           new Client();
        });
 
 
    }
 
}

5.客户端聊天界面Chat.java

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.*;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.awt.*;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.border.TitledBorder;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class Chat extends JFrame{
 
    JTextArea show_area = new JTextArea();
    JTextArea show_user = new JTextArea(10, 10);
    DataOutputStream outputStream;
    DataInputStream inputStream;
    String username;
    ArrayList<String> username_list = new ArrayList<>();
    boolean is_stop = false;
 
    public Chat(final String username) {
        this.username = username;
        
        final JPanel panel_south = new JPanel();
        panel_south.setLayout(new BorderLayout());
        panel_south.setBorder(new TitledBorder("写消息区,若私聊,在内容后添加(-用户名)"));
        JTextField send_area = new JTextField(40);
        panel_south.add(send_area, BorderLayout.CENTER);
        JButton send_btn = new JButton("发送");
        panel_south.add(send_btn,BorderLayout.EAST);
        add(panel_south, BorderLayout.SOUTH);
 
        send_btn.addActionListener(e -> {
            try {
 
                if (is_stop) {
                    show_area.append("你已被踢出,不能发送消息\n");
                    JOptionPane.showMessageDialog(null,"你已被踢出,不能发送消息,进程已经关闭","提示",
                            JOptionPane.WARNING_MESSAGE);
                    System.exit(0);
                } else {
                    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                    String time = sdf.format(new Date());
 
                    String msg = send_area.getText().trim();
 
                    if (!msg.equals("")) {
                        String[] msg1 = msg.split("-");
                        JSONObject data = new JSONObject();
                        data.put("username", username);
                        data.put("msg", msg1[0]);
                        data.put("time", time);
 
                        try {
                            data.put("private", msg1[1]);
 
                        } catch (ArrayIndexOutOfBoundsException e1) {
                            data.put("private", "");
                        }
                        outputStream.writeUTF(data.toString());
                    }
                }
                send_area.setText("");
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        });
 
        JScrollPane panel = new JScrollPane(show_area,ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        panel.setBorder(new TitledBorder("信息显示区"));
        add(panel,BorderLayout.CENTER);
        show_area.setEditable(false);
        
        final JPanel panel_east = new JPanel();
        panel_east.setLayout(new BorderLayout());
        panel_east.setBorder(new TitledBorder("在线用户"));
        panel_east.add(new JScrollPane(show_user), BorderLayout.CENTER);
        show_user.setEditable(false);
        add(panel_east, BorderLayout.EAST);
 
        setTitle("用户  " + username);
        BufferedImage img;
        try {
            img = ImageIO.read(Server.class.getResource("/a.jpg"));
            this.setIconImage(img);
        } catch (IOException exception) {
            exception.printStackTrace();
        }
        setSize(500, 500);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setVisible(true);
 
        JSONObject data = new JSONObject();
        data.put("username", username);
        data.put("msg", null);
 
        try {
            Socket socket = new Socket("127.0.0.1", 11111);
            inputStream = new DataInputStream(socket.getInputStream());
            outputStream = new DataOutputStream(socket.getOutputStream());
            outputStream.writeUTF(data.toString());
            new Thread(new Read()).start();
        } catch (IOException e) {
            show_area.append("服务器无响应");
            JOptionPane.showMessageDialog(null,"服务器无响应","提示",
                    JOptionPane.WARNING_MESSAGE);
        }
    }
 
    public class Read implements Runnable {
        @Override
        public void run() {
            try {
                while (true) {
                    String json = inputStream.readUTF();
                    JSONObject data = JSONObject.fromObject(json);
                    String msg = data.getString("msg");
                    if (msg.contains("踢出") && msg.contains(username)) {
                        is_stop = true;
                        show_area.append(username + ",你已经被踢出群聊\n");
                        JOptionPane.showMessageDialog(null,"你已经被踢出群聊","提示",
                                JOptionPane.WARNING_MESSAGE);
                        System.exit(0);
                    } else {
                        show_area.append(msg + "\n");
                        show_area.selectAll();
                        username_list.clear();
                        JSONArray jsonArray = data.getJSONArray("user_list");
                        for (Object o : jsonArray) {
                            username_list.add(o.toString());
                        }
                        show_user.setText("人数有 " + jsonArray.size() + " 人\n");
                        for (String s : username_list) {
                            show_user.append(s + "\n");
                        }
                    }
 
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
 
}

6.用户实体User.java

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
import java.net.Socket;
 
public class User {
    private String username;
    private String password;
    private Socket socket;
 
    public String getUsername() {
        return username;
    }
 
    public void setUsername(String username) {
        this.username = username;
    }
 
    public String getPassword() {
        return password;
    }
 
    public void setPassword(String password) {
        this.password = password;
    }
 
    public Socket getSocket() {
        return socket;
    }
 
    public void setSocket(Socket socket) {
        this.socket = socket;
    }
}

7.JDBC工具类

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
import com.alibaba.druid.pool.DruidDataSourceFactory;
 
import javax.sql.DataSource;
import java.io.InputStream;
import java.util.Properties;
 
public class JDBCUtils {
    private static DataSource ds;
 
    static {
        try {
            Properties pro = new Properties();
            InputStream is = JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties");
            pro.load(is);
            ds = DruidDataSourceFactory.createDataSource(pro);
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }
 
    public static DataSource getDataSource(){
        return ds;
    }
 
 
}

8.UserDao.java连接数据库

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
 
 
 
public class UserDao {
    private final JdbcTemplate template = new JdbcTemplate(JDBCUtils.getDataSource());
 
 
    public User login(User login_user) {
        try {
            //编写sql
            String sql = "select * from user where username = ? and password = ?";
 
            User user = template.queryForObject(sql,
                    new BeanPropertyRowMapper<User>(User.class),
                    login_user.getUsername(), login_user.getPassword());
            return user;
        } catch (DataAccessException e) {
            e.printStackTrace();
            return null;
        }
    }
 
    public int register(User register_user) {
        try {
            String sql = "insert into user values (null ,?,?)";
            int count = template.update(sql,register_user.getUsername(),register_user.getPassword());
            return count;
        } catch (DataAccessException e) {
            e.printStackTrace();
            return 0;
        }
    }
 
}

运行结果

java实现多人聊天工具(socket+多线程)

java实现多人聊天工具(socket+多线程)

java实现多人聊天工具(socket+多线程)

java实现多人聊天工具(socket+多线程)

java实现多人聊天工具(socket+多线程)

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。

原文链接:https://blog.csdn.net/qq_50216270/article/details/119877313

延伸 · 阅读

精彩推荐