Java使用socket网络编程实现多人聊天室

前言：套接字(socket)编程能够实现服务器和客户端的通信，以下通过Socket编程结合多线程实现多人聊天室。
程序展示：

界面类

1.客户端界面 ClientView.java

public class ClientView extends JFrame implements ActionListener, KeyListener, Runnable {    private JTextArea textArea;    private JTextField textField, tfName;    private JButton btnSend, btnId;    private JLabel label;    private JPanel jp1, jp2;    public boolean isConnect = false;    private Socket socket = null;    private DataInputStream inputStream = null;    private DataOutputStream outputStream = null;    private JScrollPane scrollPane;    private static ClientView view;    public JTextArea getTextArea() {        return textArea;    }    public DataInputStream getInputStream() {        return inputStream;    }    public DataOutputStream getOutputStream() {        return outputStream;    }    public static void main(String[] args) {        view = new ClientView();        ServiceView.clientViews.add(view);        Thread thread = new Thread(view);        thread.start();    }    public ClientView() {        initView();        try {            socket = new Socket("localhost", 9090);//连接本地服务器        } catch (UnknownHostException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }    private void initView() {        textArea = new JTextArea(20, 20);        textArea.setEditable(false);        scrollPane = new JScrollPane(textArea);        textField = new JTextField(15);        textField.addKeyListener(this);        btnSend = new JButton("发送");        btnSend.addActionListener(this);        label = new JLabel("昵称：");        tfName = new JTextField(8);        jp1 = new JPanel();        jp2 = new JPanel();        jp1.add(label);        jp1.add(tfName);        tfName.setText("用户0");        jp1.setLayout(new FlowLayout(FlowLayout.CENTER));        jp2.add(textField);        jp2.add(btnSend);        jp2.setLayout(new FlowLayout(FlowLayout.CENTER));        add(jp1, BorderLayout.NORTH);        add(scrollPane, BorderLayout.CENTER);        add(jp2, BorderLayout.SOUTH);        setTitle("聊天室");        setSize(500, 500);        setLocation(450, 150);        setVisible(true);        setDefaultCloseOperation(EXIT_ON_CLOSE);        addWindowListener(new WindowAdapter() { //窗口关闭后断开连接            @Override            public void windowClosing(WindowEvent e) {                try {                    if (socket != null)                        socket.close();                    if (inputStream!= null)                        inputStream.close();                    if (outputStream != null)                        outputStream.close();                } catch (IOException e1) {                    e1.printStackTrace();                }            }        });    }    @Override    public void actionPerformed(ActionEvent e) {        if (e.getSource() == btnSend) {            sendMsg();        }    }    private void sendMsg() {        try {            String s = textField.getText();            if (!s.equals("")) { //发送数据                textField.setText("");                textArea.append("我(" + tfName.getText() +  "):\r\n" + s + "\r\n");                outputStream = new DataOutputStream(socket.getOutputStream());                outputStream.writeUTF(tfName.getText() + "#" + s);                 outputStream.flush();            }        } catch (IOException e) {            e.printStackTrace();        }    }    @Override    public void keyPressed(KeyEvent arg0) {        if (arg0.getKeyCode() == KeyEvent.VK_ENTER) {            sendMsg();        }    }    @Override    public void keyReleased(KeyEvent arg0) {    }    @Override    public void keyTyped(KeyEvent arg0) {    }    @Override    public void run() {        try {            inputStream = new DataInputStream(socket.getInputStream());            while (true) {                String[] s = inputStream.readUTF().split("#");                textArea.append(s[0] + ":\r\n" + s[1] + "\r\n");            }        } catch (IOException e) {        }    }}

2.服务器界面 ServiceView.java

public class ServiceView extends JFrame implements ActionListener{    private JButton btnOpen, btnStop;    private JLabel label;    private Service service = null;    public static ArrayList<ClientView> clientViews = new ArrayList<>();    private static ServiceView view;    public static ServiceView getView() {        return view;    }    public static void main(String[] args) {        view = new ServiceView();    }    public ServiceView() {        initView();    }    private void initView() {        btnOpen = new JButton("打开服务器");        btnStop = new JButton("关闭服务器");        btnStop.setEnabled(false);        btnOpen.addActionListener(this);        btnStop.addActionListener(this);        label = new JLabel("服务器停止工作");        add(label);        add(btnOpen);        add(btnStop);        setTitle("服务器");        setLayout(new GridLayout(3, 1, 0, 10));        setSize(300, 300);        setLocation(450, 150);        setVisible(true);        setDefaultCloseOperation(EXIT_ON_CLOSE);    }    @Override    public void actionPerformed(ActionEvent e) {        if (e.getSource() == btnOpen) {            open();        } else {            stop();        }    }    public void open() { //开启服务器        service = new Service();        Thread thread = new Thread(service);        thread.start();        label.setText("服务器正在运行");        btnOpen.setEnabled(false);        btnStop.setEnabled(true);    }    public void stop() { //关闭服务器        label.setText("服务器已关闭");        btnOpen.setEnabled(true);        btnStop.setEnabled(false);        try {            synchronized (ClientMannager.sockets) { //关闭各个连接                for (ChatSocket socket : ClientMannager.sockets) {                    socket.getInputStream().close();                    socket.getOutputStream().close();                }                ClientMannager.sockets.removeAllElements();            }            for (ClientView view : clientViews) {                view.getInputStream().close();                view.getOutputStream().close();            }            service.getServerSocket().close();        } catch (IOException e) {            e.printStackTrace();        }    }}

功能类

1.ChatSocket.java

/*使用socket获得数据流，达到传输数据的目的*/public class ChatSocket implements Runnable{    private Socket socket = null;    private DataInputStream inputStream = null;    private DataOutputStream outputStream = null;    public DataInputStream getInputStream() {        return inputStream;    }    public DataOutputStream getOutputStream() {        return outputStream;    }    public ChatSocket(Socket socket) {        this.socket = socket;        try {            inputStream = new DataInputStream(socket.getInputStream());            outputStream = new DataOutputStream(socket.getOutputStream());        } catch (IOException e) {            e.printStackTrace();        }    }    public void send(String send) { //向客户端发送数据        try {            outputStream.writeUTF(send);            outputStream.flush();        } catch (IOException e) {            e.printStackTrace();        }    }    @Override    public void run() { //循环读取客户端发来的数据        String accept = null;        while (true) {            try {                accept = inputStream.readUTF();                ClientMannager.sendAll(this, accept);            } catch (IOException e) {                ClientMannager.sockets.remove(this);            }        }    }}

2.ClientMannager.java

/*客户端管理器*/public class ClientMannager {    private ClientMannager() {    }    public static Vector<ChatSocket> sockets = new Vector<>();    //向其他客户端发送数据    public static void sendAll(ChatSocket chatSocket, String send) {        for (ChatSocket socket : sockets) {            if (!chatSocket.equals(socket)) {                socket.send(send);            }        }    }}

3.Service.java

/*服务器端，使用线程达到循环等待连接的目的*/public class Service implements Runnable{    private ServerSocket serverSocket = null;    public ServerSocket getServerSocket() {        return serverSocket;    }    @Override    public void run() {        try {            serverSocket = new ServerSocket(9090); //创建端口            while (true) { //循地接收客户端的连接                Socket socket = serverSocket.accept();                JOptionPane.showMessageDialog(ServiceView.getView(), "客户端连接端口", "TIP", JOptionPane.INFORMATION_MESSAGE);                ChatSocket chatSocket = new ChatSocket(socket); //新客户端连接                ClientMannager.sockets.add(chatSocket); //往客户端管理器里添加客户                Thread thread = new Thread(chatSocket); //启用线程使服务器开始不断接收客户端信息                thread.start();            }        } catch (IOException e) {            e.printStackTrace();            System.out.println("服务器关闭");        }    }}