java实现的多人聊天程序

来源：互联网发布：如何通过ip找到域名编辑：程序博客网时间：2024/04/29 17:17

http://www.oschina.net/code/snippet_198455_23933

用java实现的一个简单的多人聊天程序

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源码与演示：源码出处

代码片段(3)[全屏查看所有代码]

1. [文件] ChatClient.java ~ 2KB 下载(209)

001package org.dxer;
002import java.io.BufferedReader;
003import java.io.DataInputStream;
004import java.io.DataOutputStream;
005import java.io.IOException;
006import java.io.InputStreamReader;
007import java.net.Socket;
008 
009public class ChatClient {
010    private DataOutputStream output;
011    private DataInputStream input;
012    /* 服务器端口号 */
013    public static final int PORT = 10001;
014    /* 客户端名称 */
015    private String clientName;
016 
017    public ChatClient(String clientName) {
018        this.clientName = clientName;
019    }
020 
021    public static void main(String[] args) {
022        if (args.length < 1) {
023            System.err.println("Usage:\n\t" + ChatClient.class.getName()
024                    + " <ClientName>");
025            System.exit(1);
026        }
027        // 连接服务器
028        new ChatClient(args[0]).connect("127.0.0.1");
029    }
030 
031    public void connect(String host) {
032        Socket socket = null;
033        try {
034            socket = new Socket(host, PORT);
035            System.out.println("Connected to server");
036            input = new DataInputStream(socket.getInputStream());
037            output = new DataOutputStream(socket.getOutputStream());
038            ReadThread readThread = new ReadThread();
039            WriteThread writeThread = new WriteThread();
040            readThread.start();
041            writeThread.start();
042 
043            readThread.join();
044            writeThread.join();
045        } catch (Exception e) {
046            e.printStackTrace();
047        } finally {
048            try {
049                if (input != null) {
050                    input.close();
051                }
052                if (output != null) {
053                    output.close();
054                }
055                if (socket != null) {
056                    socket.close();
057                }
058            } catch (IOException e) {
059            }
060        }
061    }
062 
063    public class ReadThread extends Thread {
064 
065        public void run() {
066            String msg = null;
067            try {
068                while (true) {
069                    msg = input.readUTF();
070                    if (msg != null) {
071                        if (!msg.equals("bye")) {
072                            System.out.println(msg);
073                        } else {
074                            break;
075                        }
076                    }
077                }
078            } catch (Exception e) {
079                e.printStackTrace();
080            }
081        }
082    }
083 
084    public class WriteThread extends Thread {
085 
086        public void run() {
087            try {
088                BufferedReader stdIn = new BufferedReader(
089                        new InputStreamReader(System.in));
090                String message = null;
091                while (true) {
092                    System.out.print("> ");
093                    message = stdIn.readLine();
094                    output.writeUTF("[" + clientName + "]$ " + message);
095                    if (message.equals("bye")) {
096                        break;
097                    }
098                }
099            } catch (Exception e) {
100                e.printStackTrace();
101            }
102        }
103    }
104 
105}

2. [文件] ChatServer.java ~ 2KB 下载(184)

001package org.dxer;
002import java.io.DataInputStream;
003import java.io.DataOutputStream;
004import java.io.IOException;
005import java.net.ServerSocket;
006import java.net.Socket;
007import java.util.ArrayList;
008 
009public class ChatServer {
010 
011    /* 客户端列表 */
012    ArrayList<Socket> clientList = new ArrayList<Socket>();
013    /* 端口号 */
014    public static final int PORT = 10001;
015 
016    public static void main(String[] args) {
017        // 在main函数中，启动服务器
018        new ChatServer().start();
019    }
020 
021    public void start() {
022        ServerSocket server = null;
023        try {
024            server = new ServerSocket(PORT);
025            System.out.println("Server is started...");
026            Socket socket = null;
027            while ((socket = server.accept()) != null) {
028                clientList.add(socket);
029                System.out.println(socket.getInetAddress().getHostAddress()
030                        + " connected to the server");
031                new WorkThread(socket).start();
032            }
033        } catch (Exception e) {
034            System.out.println(e.toString());
035        } finally {
036            if (server != null) {
037                try {
038                    server.close();
039                } catch (IOException e) {
040                }
041            }
042        }
043    }
044 
045    public class WorkThread extends Thread {
046        private Socket socket;
047 
048        public WorkThread(Socket client) {
049            this.socket = client;
050        }
051 
052        @Override
053        public void run() {
054            DataOutputStream output = null;
055            DataInputStream input = null;
056            try {
057                String msg = null;
058                String message = null;
059                input = new DataInputStream(socket.getInputStream());
060                while (true) {
061                    msg = input.readUTF();
062                    System.out.println(msg);
063                    if (msg.trim().endsWith("]$ bye")) {
064                        System.out.println(socket.getInetAddress()
065                                .getHostAddress() + " is exited");
066                        output = new DataOutputStream(socket.getOutputStream());
067                        output.writeUTF("bye");
068                        clientList.remove(socket);
069                        break;
070                    }
071                    message = "[" + Util.getTime() + " "
072                            + Util.getClientName(msg) + "]$ "
073                            + Util.getContent(msg);
074                    for (int i = 0; i < clientList.size(); i++) {
075                        Socket s = clientList.get(i);
076                        if (s != socket) {
077                            output = new DataOutputStream(s.getOutputStream());
078                            output.writeUTF(message);
079                        }
080                    }
081                }
082            } catch (Exception e) {
083                e.printStackTrace();
084            } finally {
085                try {
086                    if (input != null) {
087                        input.close();
088                    }
089 
090                    if (output != null) {
091                        output.close();
092                    }
093 
094                    if (socket != null) {
095                        socket.close();
096                    }
097                } catch (IOException e) {
098                }
099            }
100        }
101    }
102 
103}

3. [文件] Util.java ~ 834B 下载(172)

01package org.dxer;
02import java.text.SimpleDateFormat;
03import java.util.Date;
04 
05public class Util {
06 
07    /**
08     * 获得当前时间
09     *
10     * @return
11     */
12    public static String getTime() {
13        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");// 设置日期格式
14        return df.format(new Date()).toString();
15    }
16 
17    /**
18     * 获得client的名字
19     *
20     * @param message
21     * @return
22     */
23    public static String getClientName(String message) {
24        String name = null;
25        int len = message.indexOf("]$ ");
26        name = message.substring(1, len);
27        return name;
28    }
29 
30    /**
31     * 获得消息的正文部分
32     *
33     * @param message
34     * @return
35     */
36    public static String getContent(String message) {
37        String content = null;
38        int len = message.indexOf("]$ ");
39        content = message.substring(len + 3);
40        return content.trim();
41    }
42}

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