Java聊天室之实现聊天室客户端功能

<?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>com.xiaoxuzhu</groupId>
    <artifactId>basics100</artifactId>
    <version>1.0-SNAPSHOT</version>
    
    <dependencies>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-core</artifactId>
            <version>5.6.5</version>
        </dependency>
    </dependencies>
    
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <!--这里要替换成jar包main方法所在类 -->
                            <mainClass>com.xiaoxuzhu.ChatClientFrame</mainClass>
                        </manifest>
                        <manifestEntries>
                            <Class-Path>.</Class-Path>
                        </manifestEntries>
                    </archive>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                    <appendAssemblyId>false</appendAssemblyId>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id> <!-- this is used for inheritance merges -->
                        <phase>package</phase> <!-- 指定在打包节点执行jar包合并操作 -->
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

  

</project>

package com.xiaoxuzhu;

import cn.hutool.core.io.resource.ResourceUtil;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectOutputStream;
import java.net.Socket;
import java.net.URL;
import java.net.UnknownHostException;
import java.text.DateFormat;
import java.util.Date;
import java.util.Vector;

import javax.swing.*;



public class ChatClientFrame extends JFrame {
    private JTextField tf_newUser;
    private JList user_list;
    private JTextArea ta_info;
    private JTextField tf_send;
    private ObjectOutputStream out;// 声明输出流对象
    private Socket socket;
    private boolean loginFlag = false;// 为true时表示已经登录，为false时表示未登录

    public static void main(String args[]) {
        System.out.println(SwingUtilities.isEventDispatchThread());
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                System.out.println(SwingUtilities.isEventDispatchThread());
                try {
                    ChatClientFrame frame = new ChatClientFrame();
                    frame.setVisible(true);
                    frame.createClientSocket();// 调用方法创建套接字对象
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public void createClientSocket() {
        try {
             socket = new Socket("127.0.0.1", 9527);// 创建套接字对象
            out = new ObjectOutputStream(socket.getOutputStream());// 创建输出流对象
            SwingWorker<Void,Void> worker=new SwingWorker<Void, Void>() {
                @Override
                protected Void doInBackground() throws Exception {
                    try {
                        System.out.println(SwingUtilities.isEventDispatchThread());
                        BufferedReader in = new BufferedReader(new InputStreamReader(
                                socket.getInputStream()));// 创建输入流对象
                        DefaultComboBoxModel model = (DefaultComboBoxModel) user_list
                                .getModel();// 获得列表框的模型
                        while (true) {
                            String info = in.readLine().trim();// 读取信息
                            if (!info.startsWith("MSG:")) {// 接收到的不是消息
                                if (info.startsWith("退出：")) {// 接收到的是退出消息
                                    model.removeElement(info.substring(3));// 从用户列表中移除用户
                                } else {// 接收到的是登录用户
                                    boolean itemFlag = false;// 标记是否为列表框添加列表项，为true不添加，为false添加
                                    for (int i = 0; i < model.getSize(); i++) {// 对用户列表进行遍历
                                        if (info.equals((String) model.getElementAt(i))) {// 如果用户列表中存在该用户名
                                            itemFlag = true;// 设置为true，表示不添加到用户列表
                                            break;// 结束for循环
                                        }
                                    }
                                    if (!itemFlag) {
                                        model.addElement(info);// 将登录用户添加到用户列表
                                    }
                                }
                            } else {// 如果获得的是消息，则在文本域中显示接收到的消息
                                DateFormat df = DateFormat.getDateInstance();// 获得DateFormat实例
                                String dateString = df.format(new Date());         // 格式化为日期
                                df = DateFormat.getTimeInstance(DateFormat.MEDIUM);// 获得DateFormat实例
                                String timeString = df.format(new Date());         // 格式化为时间
                                String sendUser = info.substring(4,info.indexOf("：发送给："));// 获得发送信息的用户
                                String receiveInfo = info.substring(info.indexOf("：的信息是：")+6);// 获得接收到的信息
                                ta_info.append("  "+sendUser + "    " +dateString+"  "+timeString+"\n  "+receiveInfo+"\n");// 在文本域中显示信息
                                ta_info.setSelectionStart(ta_info.getText().length()-1);// 设置选择起始位置
                                ta_info.setSelectionEnd(ta_info.getText().length());// 设置选择的结束位置
                                tf_send.requestFocus();// 使发送信息文本框获得焦点
                            }
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    return null;
                }
            };
            worker.execute();
            //new ClientThread(socket).start();// 创建并启动线程对象
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    class ClientThread extends Thread {
        Socket socket;
        public ClientThread(Socket socket) {
            this.socket = socket;
        }
        public void run() {
           
        }
    }

    private void send() {
        if (!loginFlag) {
            JOptionPane.showMessageDialog(null, "请先登录。");
            return;// 如果用户没登录则返回
        }
        String sendUserName = tf_newUser.getText().trim();// 获得登录用户名
        String info = tf_send.getText();// 获得输入的发送信息
        if (info.equals("")) {
            return;// 如果没输入信息则返回，即不发送
        }
        Vector<String> v = new Vector<String>();// 创建向量对象，用于存储发送的消息
        Object[] receiveUserNames = user_list.getSelectedValues();// 获得选择的用户数组
        if (receiveUserNames.length <= 0) {
            return;// 如果没选择用户则返回
        }
        for (int i = 0; i < receiveUserNames.length; i++) {
            String msg = sendUserName + "：发送给：" + (String) receiveUserNames[i]
                    + "：的信息是： " + info;// 定义发送的信息
            v.add(msg);// 将信息添加到向量
        }
        try {
            out.writeObject(v);// 将向量写入输出流，完成信息的发送
            out.flush();// 刷新输出缓冲区
        } catch (IOException e) {
            e.printStackTrace();
        }
        DateFormat df = DateFormat.getDateInstance();// 获得DateFormat实例
        String dateString = df.format(new Date());         // 格式化为日期
        df = DateFormat.getTimeInstance(DateFormat.MEDIUM);// 获得DateFormat实例
        String timeString = df.format(new Date());         // 格式化为时间
        String sendUser = tf_newUser.getText().trim();// 获得发送信息的用户
        String receiveInfo = tf_send.getText().trim();// 显示发送的信息
        ta_info.append("  "+sendUser + "    " +dateString+"  "+timeString+"\n  "+receiveInfo+"\n");// 在文本域中显示信息
        tf_send.setText(null);// 清空文本框
        ta_info.setSelectionStart(ta_info.getText().length()-1);// 设置选择的起始位置
        ta_info.setSelectionEnd(ta_info.getText().length());// 设置选择的结束位置
        tf_send.requestFocus();// 使发送信息文本框获得焦点
    }

    
    public ChatClientFrame() {
        super();
        setTitle("聊天室客户端");
        setBounds(100, 100, 385, 288);

        final JPanel panel = new JPanel();
        getContentPane().add(panel, BorderLayout.SOUTH);

        final JLabel label = new JLabel();
        label.setText("输入聊天内容：");
        panel.add(label);

        tf_send = new JTextField();
        tf_send.addActionListener(new ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                send();// 调用方法发送信息
            }
        });
        tf_send.setPreferredSize(new Dimension(180, 25));
        panel.add(tf_send);

        final JButton button = new JButton();
        button.addActionListener(new ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                send();// 调用方法发送信息
            }
        });
        button.setText("发  送");
        panel.add(button);

        final JSplitPane splitPane = new JSplitPane();
        splitPane.setDividerLocation(100);
        getContentPane().add(splitPane, BorderLayout.CENTER);

        final JScrollPane scrollPane = new JScrollPane();
        splitPane.setRightComponent(scrollPane);

        ta_info = new JTextArea();
        ta_info.setFont(new Font("", Font.BOLD, 14));
        scrollPane.setViewportView(ta_info);

        final JScrollPane scrollPane_1 = new JScrollPane();
        splitPane.setLeftComponent(scrollPane_1);

        user_list = new JList();
        user_list.setModel(new DefaultComboBoxModel(new String[] { "" }));
        scrollPane_1.setViewportView(user_list);

        final JPanel panel_1 = new JPanel();
        getContentPane().add(panel_1, BorderLayout.NORTH);

        final JLabel label_1 = new JLabel();
        label_1.setText("用户名称：");
        panel_1.add(label_1);

        tf_newUser = new JTextField();
        tf_newUser.setPreferredSize(new Dimension(140, 25));
        panel_1.add(tf_newUser);

        final JButton button_1 = new JButton();
        button_1.addActionListener(new ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                if (loginFlag) {// 已登录标记为true
                    JOptionPane.showMessageDialog(null, "在同一窗口只能登录一次。");
                    return;
                }
                String userName = tf_newUser.getText().trim();// 获得登录用户名
                Vector v = new Vector();// 定义向量，用于存储登录用户
                v.add("用户：" + userName);// 添加登录用户
                try {
                    out.writeObject(v);// 将用户向量发送到服务器
                    out.flush();// 刷新输出缓冲区
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
                tf_newUser.setEnabled(false);// 禁用用户文本框
                loginFlag = true;// 将已登录标记设置为true
            }
        });
        button_1.setText("登  录");
        panel_1.add(button_1);

        final JButton button_2 = new JButton();
        button_2.addActionListener(new ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                String exitUser = tf_newUser.getText().trim();
                Vector v = new Vector();
                v.add("退出：" + exitUser);
                try {
                    out.writeObject(v);
                    out.flush();// 刷新输出缓冲区
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
                System.exit(0);                                     // 退出系统
            }
        });
        button_2.setText("退  出");
        panel_1.add(button_2);
        //托盘
        if (SystemTray.isSupported()){                                      // 判断是否支持系统托盘
            URL url= ResourceUtil.getResource("client.png",null);         // 获取图片所在的URL
            ImageIcon icon = new ImageIcon(url);                            // 实例化图像对象
            Image image=icon.getImage();                                    // 获得Image对象
            TrayIcon trayIcon=new TrayIcon(image);                          // 创建托盘图标
            trayIcon.addMouseListener(new MouseAdapter(){                   // 为托盘添加鼠标适配器
                public void mouseClicked(MouseEvent e){                     // 鼠标事件
                    if (e.getClickCount()==2){                              // 判断是否双击了鼠标
                        showFrame();                                    // 调用方法显示窗体
                    }
                }
            });
            trayIcon.setToolTip("系统托盘");                                    // 添加工具提示文本
            PopupMenu popupMenu=new PopupMenu();                    // 创建弹出菜单
            MenuItem exit=new MenuItem("退出");                           // 创建菜单项
            exit.addActionListener(new ActionListener() {                   // 添加事件监听器
                public void actionPerformed(final ActionEvent arg0) {
                    String exitUser = tf_newUser.getText().trim();
                    Vector v = new Vector();
                    v.add("退出：" + exitUser);
                    try {
                        out.writeObject(v);
                        out.flush();// 刷新输出缓冲区
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }
                    System.exit(0);                                     // 退出系统
                }
            });
            popupMenu.add(exit);                                        // 为弹出菜单添加菜单项
            trayIcon.setPopupMenu(popupMenu);                           // 为托盘图标加弹出菜弹
            SystemTray systemTray=SystemTray.getSystemTray();           // 获得系统托盘对象
            try{
                systemTray.add(trayIcon);                               // 为系统托盘加托盘图标
            }catch(Exception e){
                e.printStackTrace();
            }
        }

    }
    public void showFrame(){
        this.setVisible(true);                                              // 显示窗体
        this.setState(Frame.NORMAL);
    }

}