java利用Socket实现聊天室功能实例

最近研究了下Java socket通信基础，利用代码实现了一个简单的多人聊天室功能，现把代码共享下，希望能帮到有兴趣了解的人。

ChatClient:

public class ClientFrame extends Frame {    private TextField textFieldContent = new TextField();  private TextArea textAreaContent = new TextArea();  private Socket socket = null;  private OutputStream out = null;  private DataOutputStream dos = null;  private InputStream in = null;  private DataInputStream dis = null;  private boolean flag = false;    /**   * 启动客户端程序   *   * @param args   */  public static void main(String[] args) {   new ClientFrame().init();  }    /**   *  功能：对窗口进行初始化   */  private void init() {   this.setSize(300, 300);   setLocation(250, 150);   setVisible(true);   setTitle("WeChatRoom");     // 添加控件   this.add(textAreaContent);   this.add(textFieldContent, BorderLayout.SOUTH);   textAreaContent.setFocusable(false);   pack();     // 关闭事件   addWindowListener(new WindowAdapter() {    public void windowClosing(WindowEvent e) {     System.out.println("用户试图关闭窗口");     disconnect();     System.exit(0);    }     });   // textFieldContent添加回车事件   textFieldContent.addActionListener(new ActionListener() {    public void actionPerformed(ActionEvent e) {     onClickEnter();    }   });     // 建立连接   connect();   new Thread(new ReciveMessage()).start();  }    private class ReciveMessage implements Runnable {   @Override   public void run() {    flag = true;    try {     while (flag) {      String message = dis.readUTF();      textAreaContent.append(message + "\n");     }    } catch (EOFException e) {     flag = false;     System.out.println("客户端已关闭");     // e.printStackTrace();    } catch (SocketException e) {     flag = false;     System.out.println("客户端已关闭");     // e.printStackTrace();    } catch (IOException e) {     flag = false;     System.out.println("接受消息失败");     e.printStackTrace();    }   }    }    /**   * 功能：当点击回车时触发事件   */  private void onClickEnter() {   String message = textFieldContent.getText().trim();   if (message != null && !message.equals("")) {    String time = new SimpleDateFormat("h:m:s").format(new Date());    textAreaContent.append(time + "\n" + message + "\n");    textFieldContent.setText("");    sendMessageToServer(message);   }  }    /**   * 功能：给服务器发送消息   *   * @param message   */  private void sendMessageToServer(String message) {   try {    dos.writeUTF(message);    dos.flush();   } catch (IOException e) {    System.out.println("发送消息失败");    e.printStackTrace();   }  }    /**   * 功能：申请socket链接   */  private void connect() {   try {    socket = new Socket("localhost", 8888);    out = socket.getOutputStream();    dos = new DataOutputStream(out);    in = socket.getInputStream();    dis = new DataInputStream(in);   } catch (UnknownHostException e) {    System.out.println("申请链接失败");    e.printStackTrace();   } catch (IOException e) {    System.out.println("申请链接失败");    e.printStackTrace();   }  }    /**   * 功能：关闭流和链接   */  private void disconnect() {   flag = false;   if (dos != null) {    try {     dos.close();    } catch (IOException e) {     System.out.println("dos关闭失败");     e.printStackTrace();    }   }   if (out != null) {    try {     out.close();    } catch (IOException e) {     System.out.println("dos关闭失败");     e.printStackTrace();    }   }   if (socket != null) {    try {     socket.close();    } catch (IOException e) {     System.out.println("socket关闭失败");     e.printStackTrace();    }    ;   }  }   }

ChatServer:

public class ChatServer {    private List<Client> clients = new ArrayList<>();    /**   * 功能：启动ChatSever   *   * @param args   */  public static void main(String[] args) {   new ChatServer().init();  }    /**   * 功能：对chatserver初始化   */  private void init() {   System.out.println("服务器已开启");   // BindException     ServerSocket ss = null;   Socket socket = null;   try {    ss = new ServerSocket(8888);   } catch (BindException e) {    System.out.println("端口已被占用");    e.printStackTrace();   } catch (IOException e1) {    e1.printStackTrace();   }   try {    Client client = null;    while (true) {     socket = ss.accept();     System.out.println("客户驾到");     client = new Client(socket);     clients.add(client);     new Thread(client).start();    }   } catch (IOException e) {    e.printStackTrace();   }  }    private class Client implements Runnable {   private Socket socket = null;   InputStream in = null;   DataInputStream din = null;   OutputStream out = null;   DataOutputStream dos = null;   boolean flag = true;     public Client(Socket socket) {    this.socket = socket;    try {     in = socket.getInputStream();     din = new DataInputStream(in);    } catch (IOException e) {     System.out.println("接受消息失败");     e.printStackTrace();    }     }     public void run() {      String message;    try {     while (flag) {      message = din.readUTF();      // System.out.println("客户说：" + message);      forwordToAllClients(message);     }    } catch (SocketException e) {     flag = false;     System.out.println("客户下线");     clients.remove(this);     // e.printStackTrace();    } catch (EOFException e) {     flag = false;     System.out.println("客户下线");     clients.remove(this);     // e.printStackTrace();    } catch (IOException e) {     flag = false;     System.out.println("接受消息失败");     clients.remove(this);     e.printStackTrace();    }      if (din != null) {     try {      din.close();     } catch (IOException e) {      System.out.println("din关闭失败");      e.printStackTrace();     }    }    if (in != null) {     try {      in.close();     } catch (IOException e) {      System.out.println("din关闭失败");      e.printStackTrace();     }    }    if (socket != null) {     try {      socket.close();     } catch (IOException e) {      System.out.println("din关闭失败");      e.printStackTrace();     }    }     }     /**    * 功能：转发给所有客户端    *    * @param message    * @throws IOException    */   private void forwordToAllClients(String message) throws IOException {    for (Client c : clients) {     if (c != this) {      out = c.socket.getOutputStream();      dos = new DataOutputStream(out);      forwordToClient(message);     }    }   }     /**    * 功能：发送给一个客户端    *    * @throws IOException    */   private void forwordToClient(String message) throws IOException {    dos.writeUTF(message);    dos.flush();    System.out.println("转发成功！");   }    } }

运行ChatSever后，再同时打开多次ChatClient，就可以实现多人聊天了，你也试试。