java聊天室

package moreChat;
import java.io.*;
import java.net.Socket;
import java.util.concurrent.*;
public class ChatClient
{
  private static final int     PORT = 8888;
  private static ExecutorService exec = Executors.newCachedThreadPool();
  public ChatClient()
  {
    try
    {
      Socket socket = new Socket("localhost", PORT);
      exec.execute(new Sender(socket));
      System.out.println("[" + socket.getInetAddress() + "]您好，欢迎来到郑云飞聊天室！");
      BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
      String msg;
      while ((msg = br.readLine()) != null)
      {
        System.out.println(msg);
      }
    } 
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }
  /**
   * 客户端线程获取控制台输入消息
   */
  static class Sender implements Runnable
  {
    private Socket socket;

    public Sender(Socket socket)
    {
      this.socket = socket;
    }
    public void run()
    {
      try
      {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter pw = new PrintWriter(socket.getOutputStream(), true);
        String msg;
        while(true)
        {
          msg = br.readLine();
          pw.println(msg);
          if (msg.trim().equals("bye"))
          {
            pw.close();
            br.close();
            exec.shutdownNow();
            break;
          }
        }
      } 
      catch (Exception e)
      {
        e.printStackTrace();
      }
    }
  }
  public static void main(String[] args) throws Exception
  {
    new ChatClient();
  }
}

 

package moreChat;
import java.io.*;
import java.net.*;
import java.util.*;
import java.util.concurrent.*;
public class ChatServer
{
  private static final int  PORT = 8888;           // 端口号
  private static List<Socket> list = new ArrayList<Socket>(); // 保存连接对象
  private ExecutorService   exec;
  private ServerSocket    server;
  public ChatServer()
  {
    try
    {
      server = new ServerSocket(PORT);
      exec = Executors.newCachedThreadPool();
      System.out.println("服务器已启动！");
      Socket client = null;
      while (true)
      {
        client = server.accept(); // 接收客户连接
        list.add(client);
        exec.execute(new ChatTask(client));
      }
    } 
    catch (IOException e)
    {
      e.printStackTrace();
    }
  }

  static class ChatTask implements Runnable
  {
    private Socket     socket;
    private BufferedReader br;
    private PrintWriter  pw;
    private String     msg;

    public ChatTask(Socket socket) throws IOException
    {
      this.socket = socket;
      br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
      msg = "[" + this.socket.getInetAddress() + "]进入聊天室！当前聊天室有["+ list.size() + "]人";
      sendMessage();
    }
    public void run()
    {
      try
      {
        while ((msg = br.readLine()) != null)
        {
          if (msg.trim().equals("bye"))
          {
            list.remove(socket);
            br.close();
            pw.close();
            msg = "[" + socket.getInetAddress() + "]离开聊天室！当前聊天室有["+ list.size() + "]人";
            socket.close();
            sendMessage();
            break;
          } 
          else
          {
            msg = "[" + socket.getInetAddress() + "]说：" + msg;
            sendMessage();
          }
        }
      } 
      catch (IOException e)
      {
        e.printStackTrace();
      }
    }
    /**
     * 群发消息给聊天室的所有人
     */
    private void sendMessage() throws IOException
    {
      System.out.println(msg);
      for (Socket client : list)
      {
        pw = new PrintWriter(client.getOutputStream(), true);
        pw.println(msg);
      }
    }
  }

  public static void main(String[] args)
  {
    new ChatServer();
  }

}