package com.xiaoxuzhu;
import java.awt.BorderLayout;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

/**
 * Description: 
 *
 * @author xiaoxuzhu
 * @version 1.0
 *
 * <pre>
 * 修改記錄:
 * 修改后版本	        修改人		修改日期			修改內(nèi)容
 * 2022/6/5.1	    xiaoxuzhu		2022/6/5		    Create
 * </pre>
 * @date 2022/6/5
 */
public class ClientOneToOneServerFrame  extends JFrame{
    private JTextArea ta_info;
    private ServerSocket server; // 聲明ServerSocket對(duì)象
    private Socket socket; // 聲明Socket對(duì)象socket
    private Hashtable<String, Socket> map = new Hashtable<String, Socket>();// 用于存儲(chǔ)連接到服務(wù)器的用戶(hù)和客戶(hù)端套接字對(duì)象

    public void createSocket() {
        try {
            server = new ServerSocket(9527);
            while (true) {
                ta_info.append("等待新客戶(hù)連接......\n");
                socket = server.accept();// 創(chuàng)建套接字對(duì)象
                ta_info.append("客戶(hù)端連接成功。" + socket + "\n");
                new ServerThread(socket).start();// 創(chuàng)建并啟動(dòng)線(xiàn)程對(duì)象
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    class ServerThread extends Thread {
        Socket socket;

        public ServerThread(Socket socket) {
            this.socket = socket;
        }

        public void run() {
            try {
                BufferedReader in = new BufferedReader(new InputStreamReader(
                        socket.getInputStream()));// 創(chuàng)建輸入流對(duì)象
                while (true) {
                    String info = in.readLine();// 讀取信息
                    String key = "";
                    if (info.startsWith("用戶(hù)：")) {// 添加登錄用戶(hù)到客戶(hù)端列表
                        key = info.substring(3, info.length());// 獲得用戶(hù)名并作為鍵使用
                        map.put(key, socket);// 添加鍵值對(duì)
                        Set<String> set = map.keySet();// 獲得集合中所有鍵的Set視圖
                        Iterator<String> keyIt = set.iterator();// 獲得所有鍵的迭代器
                        while (keyIt.hasNext()) {
                            String receiveKey = keyIt.next();// 獲得表示接收信息的鍵
                            Socket s = map.get(receiveKey);// 獲得與該鍵對(duì)應(yīng)的套接字對(duì)象
                            PrintWriter out = new PrintWriter(s
                                    .getOutputStream(), true);// 創(chuàng)建輸出流對(duì)象
                            Iterator<String> keyIt1 = set.iterator();// 獲得所有鍵的迭代器
                            while (keyIt1.hasNext()) {
                                String receiveKey1 = keyIt1.next();// 獲得鍵，用于向客戶(hù)端添加用戶(hù)列表
                                out.println(receiveKey1);// 發(fā)送信息
                                out.flush();// 刷新輸出緩沖區(qū)
                            }
                        }

                    } else {// 轉(zhuǎn)發(fā)接收的消息
                        key = info.substring(info.indexOf("：發(fā)送給：") + 5, info
                                .indexOf("：的信息是："));// 獲得接收方的key值,即接收方的用戶(hù)名
                        String sendUser = info.substring(0, info
                                .indexOf("：發(fā)送給："));// 獲得發(fā)送方的key值,即發(fā)送方的用戶(hù)名
                        Set<String> set = map.keySet();// 獲得集合中所有鍵的Set視圖
                        Iterator<String> keyIt = set.iterator();// 獲得所有鍵的迭代器
                        while (keyIt.hasNext()) {
                            String receiveKey = keyIt.next();// 獲得表示接收信息的鍵
                            if (key.equals(receiveKey)
                                    && !sendUser.equals(receiveKey)) {// 如果是發(fā)送方，但不是用戶(hù)本身
                                Socket s = map.get(receiveKey);// 獲得與該鍵對(duì)應(yīng)的套接字對(duì)象
                                PrintWriter out = new PrintWriter(s
                                        .getOutputStream(), true);// 創(chuàng)建輸出流對(duì)象

                                out.println("MSG:"+info);// 發(fā)送信息
                                out.flush();// 刷新輸出緩沖區(qū)
                            }
                        }
                    }
                }
            } catch (IOException e) {
                ta_info.append(socket + "已經(jīng)退出。\n");
            }
        }
    }

    /**
     * Launch the application
     *
     * @param args
     */
    public static void main(String args[]) {
        ClientOneToOneServerFrame frame = new ClientOneToOneServerFrame();
        frame.setVisible(true);
        frame.createSocket();
    }

    /**
     * Create the frame
     */
    public ClientOneToOneServerFrame() {
        super();
        setTitle("客戶(hù)端一對(duì)一通信——服務(wù)器端程序");
        setBounds(100, 100, 385, 266);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        final JScrollPane scrollPane = new JScrollPane();
        getContentPane().add(scrollPane, BorderLayout.CENTER);

        ta_info = new JTextArea();
        scrollPane.setViewportView(ta_info);
    }
}

package com.xiaoxuzhu;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;

import javax.swing.*;

/**
 * Description: 
 *
 * @author xiaoxuzhu
 * @version 1.0
 *
 * <pre>
 * 修改記錄:
 * 修改后版本	        修改人		修改日期			修改內(nèi)容
 * 2022/6/5.1	    xiaoxuzhu		2022/6/5		    Create
 * </pre>
 * @date 2022/6/5
 */
public class ClientOneToOneClientFrame extends JFrame{
    private JTextField tf_newUser;
    private JList user_list;
    private JTextArea ta_info;
    private JTextField tf_send;
    PrintWriter out;// 聲明輸出流對(duì)象
    private boolean loginFlag = false;// 為true時(shí)表示已經(jīng)登錄，為false時(shí)表示未登錄
    private Socket socket;
    /**
     * Launch the application
     *
     * @param args
     */
    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    ClientOneToOneClientFrame frame = new ClientOneToOneClientFrame();
                    frame.setVisible(true);
                    frame.createClientSocket();// 調(diào)用方法創(chuàng)建套接字對(duì)象
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public void createClientSocket() {
        try {
             socket = new Socket("127.0.0.1", 9527);// 創(chuàng)建套接字對(duì)象
            out = new PrintWriter(socket.getOutputStream(), true);// 創(chuàng)建輸出流對(duì)象
            SwingWorker<Void,Void> worker=new SwingWorker<Void, Void>() {
                @Override
                protected Void doInBackground() throws Exception {
                    try {
                        BufferedReader in = new BufferedReader(new InputStreamReader(
                                socket.getInputStream()));// 創(chuàng)建輸入流對(duì)象
                        DefaultComboBoxModel model = (DefaultComboBoxModel) user_list
                                .getModel();// 獲得列表框的模型
                        while (true) {
                            String info = in.readLine().trim();// 讀取信息

                            if (!info.startsWith("MSG:")) {
                                boolean itemFlag = false;// 標(biāo)記是否為列表框添加列表項(xiàng)，為true不添加，為false添加
                                for (int i = 0; i < model.getSize(); i++) {
                                    if (info.equals((String) model.getElementAt(i))) {
                                        itemFlag = true;
                                    }
                                }
                                if (!itemFlag) {
                                    model.addElement(info);// 添加列表項(xiàng)
                                } else {
                                    itemFlag = false;
                                }
                            } else {
                                ta_info.append(info + "\n");// 在文本域中顯示信息
                                if (info.equals("88")) {
                                    break;// 結(jié)束線(xiàn)程
                                }
                            }
                        }
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    return null;
                }
            };
            worker.execute();
            
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    private void send() {
        if (!loginFlag) {
            JOptionPane.showMessageDialog(null, "請(qǐng)先登錄。");
            return;
        }
        String sendUserName = tf_newUser.getText().trim();
        String info = tf_send.getText();// 獲得輸入的信息
        if (info.equals("")) {
            return;// 如果沒(méi)輸入信息則返回，即不發(fā)送
        }
        String receiveUserName = (String) user_list.getSelectedValue();// 獲得接收信息的用戶(hù)
        String msg = sendUserName + "：發(fā)送給：" + receiveUserName + "：的信息是： "
                + info;// 定義發(fā)送的信息
        if (info.equals("88")) {
            System.exit(0);// 如果沒(méi)輸入信息是88，則退出
        }
        out.println(msg);// 發(fā)送信息
        out.flush();// 刷新輸出緩沖區(qū)
        tf_send.setText(null);// 清空文本框
    }

    /**
     * Create the frame
     */
    public ClientOneToOneClientFrame() {
        super();
        setTitle("客戶(hù)端一對(duì)一通信——客戶(hù)端程序");
        setBounds(100, 100, 385, 288);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

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

        final JLabel label = new JLabel();
        label.setText("輸入聊天內(nèi)容：");
        panel.add(label);

        tf_send = new JTextField();
        tf_send.addActionListener(new ActionListener() {
            public void actionPerformed(final ActionEvent e) {
                send();// 調(diào)用方法發(fā)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();// 調(diào)用方法發(fā)送信息
            }
        });
        button.setText("發(fā)  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();
        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("輸入用戶(hù)名稱(chēng)：");
        panel_1.add(label_1);

        tf_newUser = new JTextField();
        tf_newUser.setPreferredSize(new Dimension(180, 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) {
                    JOptionPane.showMessageDialog(null, "在同一窗口只能登錄一次。");
                    return;
                }
                String userName = tf_newUser.getText().trim();// 獲得登錄用戶(hù)名
                out.println("用戶(hù)：" + userName);// 發(fā)送登錄用戶(hù)的名稱(chēng)
                out.flush();// 刷新輸出緩沖區(qū)
                tf_newUser.setEnabled(false);
                loginFlag = true;
            }
        });
        button_1.setText("登  錄");
        panel_1.add(button_1);
    }
}