Java 聊天室

学习内容 ： Socket , Thread, IO操作，简单的GUI控件

效果图如下 ：

Paste_Image.png

界面可自行美化

代码如下

package com.hwaphon;

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.ArrayList;
import java.util.Iterator;

public class ServerClient {

    private ArrayList<PrintWriter> mWriters;

    public class MyHandler implements Runnable {

        Socket mSocket;
        BufferedReader mReader;

        public MyHandler(Socket socket) {
            mSocket = socket;
            try {
                InputStreamReader reader = new InputStreamReader(
                        mSocket.getInputStream());
                mReader = new BufferedReader(reader);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        @Override
        public void run() {
            String message = "";

            try {
                while ((message = mReader.readLine()) != null) {
                    tellEveryone(message);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

    }

    public void start() {
        mWriters = new ArrayList<>();

        try {
            ServerSocket serverSocket = new ServerSocket(5000);

            while (true) {
                Socket socket = serverSocket.accept();
                PrintWriter pWriter = new PrintWriter(socket.getOutputStream());
                mWriters.add(pWriter);

                Thread thread = new Thread(new MyHandler(socket));
                thread.start();

                System.out.println("Got a connection");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void tellEveryone(String message) {

        Iterator<PrintWriter> iterator = mWriters.iterator();
        while (iterator.hasNext()) {
            PrintWriter writer = iterator.next();
            writer.println(message);
            writer.flush();
        }
    }

    public static void main(String[] args) {
        new ServerClient().start();
    }

}





package com.hwaphon;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
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.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

import com.hwaphon.ServerClient.MyHandler;

public class SocketClient {

    private JFrame mFrame;
    private JPanel mPane;
    private JTextArea mArea;
    private JScrollPane mScrollPane;
    private JButton mButton;
    private JTextField mField;

    private Socket mSocket;
    private PrintWriter mWriter;
    private BufferedReader mReader;

    public SocketClient() {
        setUI();
        setNetWork();
        new Thread(new IncomingReader()).start();
    }

    private void setNetWork() {
        try {

            mSocket = new Socket("127.0.0.1", 5000);
            mWriter = new PrintWriter(mSocket.getOutputStream());
            mReader = new BufferedReader(new InputStreamReader(
                    mSocket.getInputStream()));

        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void setUI() {

        mButton = new JButton("Send");
        mButton.setFocusable(false);
        mButton.setBackground(Color.WHITE);
        mButton.addActionListener(new SendListener());

        mField = new JTextField(20);

        mArea = new JTextArea(6, 18);
        Font font = new Font("sanserif", Font.BOLD, 24);
        mArea.setFont(font);
        mArea.setLineWrap(true);
        mArea.setWrapStyleWord(true);
        mArea.setEditable(false);

        mScrollPane = new JScrollPane(mArea);
        mScrollPane
                .setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        mScrollPane
                .setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);

        mPane = new JPanel();
        mPane.add(mScrollPane);
        mPane.add(mField);
        mPane.add(mButton);

        mFrame = new JFrame();
        mFrame.getContentPane().add(mPane, BorderLayout.CENTER);
        mFrame.setSize(480, 320);
        mFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        mFrame.setLocationRelativeTo(null);
        mFrame.setVisible(true);

    }

    public class SendListener implements ActionListener {

        @Override
        public void actionPerformed(ActionEvent e) {
            String message = mField.getText().toString();
            mWriter.println(message);
            mWriter.flush();
            mField.setText("");
            mField.requestFocus();
        }

    }

    public static void main(String[] args) {
        SocketClient soClient = new SocketClient();
    }

    public class IncomingReader implements Runnable {

        @Override
        public void run() {
            String message = "";
            try {
                while ((message = mReader.readLine()) != null) {
                    mArea.append(message + "\n");
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

    }

}

注意修改包名。