简单QQ网络聊天机程序

这是我以前编的一个类似于QQ的网络聊天机，仅仅实现了消息聊天这个简单的功能，其他很多功能还没有实现，这个程序只能作为练笔，还不能应用于实际当中，程序编写主要参考尚学堂视频教程，里面还有一个异常我不会处理，想请教各位，请各位多多指点，多多指教！

本程序有两个程序文件，一个是客户端程序ChatClient.java，一个是服务器端程序ChatServer.java，实现服务器功能。

 网络聊天机源代码下载

源程序：

 客户端程序：

ChatClient.java

 package org.standlww.Application.Project.Chat;

import java.awt.*;import javax.swing.*;import java.awt.event.*;import java.io.*;import java.net.*;import java.util.*;

public class ChatClient {

  private JFrame jFrame = null;  //  @jve:decl-index=0:visual-constraint="241,73" private JPanel jContentPane = null; private JTextArea jTextArea = null; private JButton jButton = null; private JButton jButton1 = null; private JTextArea jTextArea1 = null; private Socket s=null; //  @jve:decl-index=0: private InputStream inStream=null;  //  @jve:decl-index=0: private OutputStream outStream=null; private Scanner in=null; private PrintWriter out=null; private String message=null; private String receivedMessage=null; private Thread receiveRunnable=null; private boolean bConnected=false;   /**  * This method initializes jFrame   *    * @return javax.swing.JFrame   */ private JFrame getJFrame() {  if (jFrame == null) {   jFrame = new JFrame();   jFrame.setTitle("网络聊天鸡");   jFrame.setBounds(new Rectangle(301, 166, 441, 436));   jFrame.setContentPane(getJContentPane());   jFrame.setVisible(true);   jFrame.addWindowListener(new WindowAdapter(){

    @Override    /*在exit(0)退出客户端程序前，应先调用disconnect()方法，先做把Socket inStream等关闭和回收的处理,    但目前调用disconnect()方法会造成客户端程序无法退出,原因是ReceiveRunnable类中的run()方法中的in.next()为阻塞型,    无法使线程退出,到目前为止还不知道怎么使这个线程退出,期待解决!*/    public void windowClosing(WindowEvent event) {     //disconnect();     System.exit(0);     //super.windowClosing(e);    }       });  }  return jFrame; }

 /**  * This method initializes jContentPane   *    * @return javax.swing.JPanel   */ private JPanel getJContentPane() {  if (jContentPane == null) {   jContentPane = new JPanel();   jContentPane.setLayout(null);   jContentPane.add(getJTextArea(), null);   jContentPane.add(getJButton(), null);   jContentPane.add(getJButton1(), null);   jContentPane.add(getJTextArea1(), null);  }  return jContentPane; }

 /**  * This method initializes jTextArea   *    * @return javax.swing.JTextArea   */ private JTextArea getJTextArea() {  if (jTextArea == null) {   jTextArea = new JTextArea();   jTextArea.setBounds(new Rectangle(8, 9, 417, 263));   jTextArea.setEditable(false);   //new JScrollPane(jTextArea);   jTextArea.setText("聊天窗口");  }  return jTextArea; }   

 /**  * This method initializes jTextArea1   *    * @return javax.swing.JTextArea   */ private JTextArea getJTextArea1() {  if (jTextArea1 == null) {   jTextArea1 = new JTextArea();   jTextArea1.setBounds(new Rectangle(11, 282, 412, 89));   jTextArea1.setLineWrap(true);   new JScrollPane(jTextArea1);//.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);  }  return jTextArea1; }     /**  * This method initializes jButton1   *    * @return javax.swing.JButton   */ private JButton getJButton1() {  if (jButton1 == null) {   jButton1 = new JButton();   jButton1.setBounds(new Rectangle(321, 376, 82, 21));   jButton1.setText("发送");   jButton1.addActionListener(new SendMessageListener());  }  return jButton1; }    /**  * This method initializes jButton   *    * @return javax.swing.JButton   */ private JButton getJButton() {  if (jButton == null) {   jButton = new JButton();   jButton.setBounds(new Rectangle(227, 376, 82, 21));   jButton.setText("关闭");   jButton.addActionListener(new CloseAndExitListener());  }  return jButton; }

    ChatClient(){    lanchFrame();  connect(); }     private void connect() {    try {   s=new Socket("127.0.0.1",8888);    bConnected=true;   System.out.println("Connected!");   inStream=s.getInputStream();   outStream=s.getOutputStream();            in=new Scanner(inStream);      out=new PrintWriter(outStream,true);  } catch (UnknownHostException e) {     e.printStackTrace();  } catch (IOException e) {           e.printStackTrace();  }  receiveRunnable=new Thread(new ReceiveRunnable());  receiveRunnable.start(); }     private void disconnect(){    /*try{   bConnected=false;   receiveRunnable.join();  }catch(InterruptedException e){   e.printStackTrace();  }finally{*/  try{   if(out==null){   out.close();   out=null;   }   if(in!=null){    in.close();    in=null;   }   if(outStream==null){   outStream.close();   outStream=null;   }   if(inStream!=null){    inStream.close();    inStream=null;   }   if(s==null){   s.close();   s=null;   }  }  catch(IOException e){   e.printStackTrace();  }   // } }    private void lanchFrame(){    getJFrame();     }

    private class CloseAndExitListener implements ActionListener{

  public void actionPerformed(ActionEvent event) {   //disconnect();   System.exit(0);     }   }     private class SendMessageListener implements ActionListener{

  public void actionPerformed(ActionEvent event) {  //try{     message=jTextArea1.getText().trim();  if(message.equals(""))   System.out.println("不能发送空白内容!");//这里应该是显示一消息:不能发送空白内容  else{  jTextArea.append("/n");//之前得先换行  jTextArea.append(message);  jTextArea1.setText("");    out.println(message);  }//}finally{  //s.close();//} }   }

   private class ReceiveRunnable implements Runnable{

  public void run() {   while(bConnected&&in.hasNextLine()){    receivedMessage=in.nextLine();    jTextArea.append("/n");    jTextArea.append(receivedMessage);   }  }   } 

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

 }

}

服务器端程序：

ChatServer.java

package org.standlww.Application.Project.Chat;

import java.net.*;import java.io.*;import java.util.*;

public class ChatServer {

 private ServerSocket s=null; private Socket incoming=null; boolean started=false; private ArrayList<Client> Clients=new ArrayList<Client>();    private Client client=null;   public static void main(String[] args) {      new ChatServer().start();    }    void start(){  try{      s=new ServerSocket(8888);      System.out.println("服务器已经启动!");      started=true;      }catch(BindException e){       System.out.println("服务器已经启动,端口使用中...");       System.out.println("请关闭相关程序,重新启动服务器!");       System.exit(0);      }catch(IOException e){       e.printStackTrace();      }                  try{             while(started){           incoming=s.accept();        client=new Client(incoming);       Clients.add(client);    new Thread(client).start();           System.out.println("a Client connected!");       }  }catch(EOFException e){      System.out.println("Client Closed!");  } catch (IOException e) {      e.printStackTrace();  }finally{      try{       if(s!=null){        s.close();        s=null;       }      }catch(IOException e){       e.printStackTrace();      }     } }   

      private class Client implements Runnable{

  private Socket incoming=null;  private InputStream inStream=null;  private OutputStream outStream=null;  private Scanner in=null;   private PrintWriter out=null;  private String message=null;  private boolean bConnected=false;    Client(Socket incoming){      this.incoming=incoming;   bConnected=true;   try {    inStream=incoming.getInputStream();    outStream = incoming.getOutputStream();                 in=new Scanner(inStream);               out=new PrintWriter(outStream,true);   } catch (IOException e) {       e.printStackTrace();   }  }      /*这个函数需要改进,当客户端程序有一方退出时会抛出NullPointerException,到目前为止还不知道怎么处理这个异常,期待解决!*/  void sendMessage(String message) {   out.println(message);    }            public void run() {   //try{   while(bConnected==true&&in.hasNextLine()){   message=in.nextLine();     for(int i=0;i<Clients.size();i++){   Client c=Clients.get(i);        if(c!=this)     c.sendMessage(message);       }    }   //}   //finally{   try{   if(in!=null){    in.close();    in=null;    }   if(out!=null){    out.close();    out=null;   }    if(inStream!=null){    inStream.close();    inStream=null;    }    if(outStream!=null){     outStream.close();     outStream=null;    }    if(incoming!=null){    incoming.close();    incoming=null;    }   }catch(IOException e){     e.printStackTrace();    }   // }   }      }   

}