java "群发"聊天demo

来源：互联网发布：软件过程能力编辑：程序博客网时间：2024/05/31 06:22

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;

/**
* chat server
*
* @author Sam
*
*/
public class Server
{
   private List<Client> clients = new ArrayList<Client>();

   public static void main(String[] args)
   {
       Server server = new Server();
       server.lauchServer();
   }

   /**
   * to laucher a server
   */
   public void lauchServer()
   {
       ServerSocket server = null;
       try
       {
           server = new ServerSocket(8182);
           System.out.println("the server lauch successfull!");
       }
       catch (IOException e)
       {

       }

       while (true)
       {
           try
           {
               Socket socket = server.accept();
               Client client = new Client(socket);
               client.start();
               clients.add(client);
           }
           catch (Exception ex)
           {

           }
       }
   }

   private final class Client extends Thread
   {
       private Socket socket;
       private DataInputStream read = null;
       private DataOutputStream write = null;
       public Client(Socket socket)
       {
           this.socket = socket;
       }

       /**
       * to send the msg
       * @param read
       * @throws IOException
       */
       private void sendMSG(String msg)throws IOException
       {
           write.writeUTF(msg);
       }

       /**
       * retrun true if client has still connected the server, or false
       * @return
       */
       public boolean isConnectedServer()
       {
           return this.socket.isClosed()?false:true;
       }

       @Override
       public void run()
       {

           try
           {
               write = new DataOutputStream(socket.getOutputStream());
               while (true)
               {
                   read = new DataInputStream(socket.getInputStream());
                   String msg = read.readUTF();
                   for(Client client : clients)
                   {
                       if(client.isConnectedServer())
                       {
                           client.sendMSG(msg);
                       }
                   }

               }
           }
           catch (IOException e)
           {
           }
           finally
           {
               if(null != socket)
               {
                       try
                       {
                           if(null != write)
                               write.close();
                           if(null != read)
                               read.close();
                           if(null !=socket)
                               socket.close();
                       }
                       catch (IOException e)
                       {
                           e.printStackTrace();
                       }
                   }
           }

       }
   }

}

---------------------------------------------------------------------------------------------------------------------------------------------------------------------------

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;

import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.JTextField;

/**
* chat client
* @author Sam
*
*/
public class Client extends JFrame
{
   private JTextArea area = new JTextArea();//chat list
   private JTextField field = new JTextField();//send sms field
   private Socket socket;
   private DataOutputStream write;
   private DataInputStream read ;
   public Client()
   {
       this.setBounds(500, 200, 300, 300);
       this.setTitle("Client");
       this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       area.setEnabled(false);
       area.setBackground(Color.red);
       this.add(BorderLayout.CENTER, area);
       field.addActionListener(new ActionListener()
       {
           @Override
           public void actionPerformed(ActionEvent arg0)
           {
               //area.append("say:"+field.getText()+"\n");
               try
               {
                   write.writeUTF(field.getText());
               }
               catch (IOException e)
               {
                   System.out.println("you can not send the message, your client stream was closed!");
               }

               field.setText("");

           }
       });
       this.add(BorderLayout.SOUTH, field);
   }

   /**
   * to lauch the Client and connect the server
   */
   public void lauchClient()
   {
       this.setVisible(true);
       connect();
   }
   /**
   * to connect the server
   */
   public void connect()
   {
       try
       {
           System.out.println("client is connecting...!");
           socket = new Socket("127.0.0.1", 8182);
           System.out.println("client connected!");
           write = new DataOutputStream(socket.getOutputStream());
           read = new DataInputStream(socket.getInputStream());
           while(true)
           {
               String receive = read.readUTF();
               area.append(receive+"\n");
           }

       }
       catch (Exception e)
       {
           System.out.println("error! client socket is closing...");
       }
       finally
       {
           if(null !=socket)
           {
               try
               {
                   write.close();
                   read.close();
                   socket.close();
                   System.out.println("client socket was closed!");
               }
               catch (IOException e)
               {

               }
           }
       }

   }

   public static void main(String[] args)
   {
       Client client = new Client();
       client.lauchClient();
   }
}

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