mainframe.java

采用Java语言进行网络编程实现

package mulitservernew;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import java.net.*;
import java.io.*;
import java.util.Vector;  //引入Vector类，用于存储客户信息
import java.util.StringTokenizer;  //引入StringTokenizer类，用于信息分离


/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author not attributable
 * @version 1.0
 */

public class MainFrame extends JFrame {
  ServerSocket server=null;
  ConnectSocket connect=null;
  static Vector clients=new Vector();   //用vector向量存储客户列表信息

  JPanel contentPane;
  JLabel jLabel1 = new JLabel();
  JTextField jTextField1 = new JTextField();
  JButton jButton1 = new JButton();
  TitledBorder titledBorder1;
  TitledBorder titledBorder2;
  TitledBorder titledBorder3;
  TitledBorder titledBorder4;
  TitledBorder titledBorder5;
  TitledBorder titledBorder6;
  JPanel jPanel1 = new JPanel();
  Border border1;
  TitledBorder titledBorder7;
  BorderLayout borderLayout1 = new BorderLayout();
  JScrollPane jScrollPane1 = new JScrollPane();
  JTextArea jTextArea1 = new JTextArea();
  JPanel jPanel2 = new JPanel();
  JScrollPane jScrollPane2 = new JScrollPane();
  BorderLayout borderLayout2 = new BorderLayout();
  JTextArea jTextArea2 = new JTextArea();

  //Construct the frame
  public MainFrame() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    titledBorder1 = new TitledBorder("");
    titledBorder2 = new TitledBorder("");
    titledBorder3 = new TitledBorder("");
    titledBorder4 = new TitledBorder("");
    titledBorder5 = new TitledBorder("");
    titledBorder6 = new TitledBorder("");
    border1 = BorderFactory.createBevelBorder(BevelBorder.LOWERED,Color.white,Color.white,new Color(103, 101, 98),new Color(148, 145, 140));
    titledBorder7 = new TitledBorder(new EtchedBorder(EtchedBorder.RAISED,Color.white,new Color(148, 145, 140)),"系统信息");
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 14));
    jLabel1.setText("监听端口");
    jLabel1.setBounds(new Rectangle(26, 13, 60, 25));
    contentPane.setLayout(null);
    this.setSize(new Dimension(376, 365));
    this.setTitle("多客户信息广播系统-服务器端");
    jTextField1.setFont(new java.awt.Font("Dialog", 0, 14));
    jTextField1.setText("6544");
    jTextField1.setBounds(new Rectangle(123, 13, 92, 25));
    jButton1.setBounds(new Rectangle(242, 13, 105, 25));
    jButton1.setFont(new java.awt.Font("Dialog", 0, 14));
    jButton1.setText("开始监听");
    jButton1.addActionListener(new MainFrame_jButton1_actionAdapter(this));
    jPanel1.setBorder(titledBorder7);
    jPanel1.setBounds(new Rectangle(15, 54, 330, 145));
    jPanel1.setLayout(borderLayout1);
    jScrollPane1.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
    jScrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    jTextArea1.setText("");
    jPanel2.setLayout(borderLayout2);
    jPanel2.setBorder(titledBorder7);
    jPanel2.setBounds(new Rectangle(17, 203, 327, 121));
    jScrollPane2.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
    jScrollPane2.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    contentPane.add(jLabel1, null);
    contentPane.add(jButton1, null);
    contentPane.add(jTextField1, null);
    contentPane.add(jPanel1, null);
    jPanel1.add(jScrollPane1,  BorderLayout.CENTER);
    contentPane.add(jPanel2, null);
    jPanel2.add(jScrollPane2, BorderLayout.CENTER);
    jScrollPane2.getViewport().add(jTextArea2, null);
    jScrollPane1.getViewport().add(jTextArea1, null);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }
  class ConnectSocket extends Thread{
        Socket socket;
        public void run(){
            while(true){
                       try{
                           socket=server.accept();//等待客户连接
                      }  catch(IOException e2){
                           jTextArea1.append(" 客户连接失败\n");
                       }
                     /*客户连接成功，定义并实例化一个Client线程，
每一个线程对应一个客户连接*/
                  Client c=new Client(socket);
                  /*将连接的客户添加到客户列表存储clients中*/
                clients.addElement(c);
                /*测该用户名称是否存在，如不存在，则启动线程，
实现客户与服务器的信息交互通道*/
                 if(checkName(c)){
                         //启动线程
                        c.start();
                                /*向每个客户端更新客户列表信息*/
                     notifyRoom();
                     }else{
                        disconnect(c);
                     }
                }
        }
}
      class Client extends Thread{
                 String name;         //用来存储客户的连接姓名
                 BufferedReader dis;  //用于实现接受从客户端发送来的数据流
                 PrintStream ps;     //用来实现向客户端发送信息的打印流
                 Socket socket;  //用于建立套接字
                 public  Client(Socket s){       //Client 线程的构造器
                         socket=s;  //将服务器-客户端建立连接所形成的套接字传递到该线程
                    try{
                          /*储特定客户socket的输入流，接受客户发送到服务器端的信息*/
                         dis=new BufferedReader(new InputStreamReader(socket.getInputStream()));
                          /*存储特定客户的输出流，发送服务器信息给客户*/
                          ps=new PrintStream(socket.getOutputStream());
                          /*读取接收到的信息，该信息为客户登陆信息*/
                          String info=dis.readLine();
                          //*将信息用"："分离
                          StringTokenizer stinfo=new StringTokenizer(info,":");
                   /*用head存储关键区分字*/
                           String head=stinfo.nextToken();
                   /*第二个数据段是客户的名称*/
                           name=stinfo.nextToken();
                                jTextArea1.append("系统消息："+name+"已经连接\n");
                       }catch(IOException e){
                      jTextArea2.append("系统消息：用户连接出错\n");
                    }
                  }
                  /*实现向客户端发送信息的方法*/
                  public void send(String msg){
                      ps.println(msg);
                      ps.flush();
                    }
              /*读取客户端发送过来的信息*/
              public void run(){
                     while(true){
                              String line=null;
                                try{
                                  /*读取客户端发送的信息*/
      line=dis.readLine();
                                }catch(IOException e){
                                              /*如果出错，则要关闭连接，并更新客户列表信息*/
                                  jTextArea2.append("系统消息：读客户信息出错");
                                  disconnect(this);
      notifyRoom();
                                  return ;
                                  }
                                      /*对读入的信息进行分离，以确定信息类型*/
                                StringTokenizer st=new StringTokenizer(line,":");
                                String keyword=st.nextToken();//关键字，判断消息类型
                                      /*如果关键字是MSG，则是客户端发送的聊天信息*/
                               if(keyword.equalsIgnoreCase("MSG")){
                                       /*将接收到的客户聊天信息，通过调用信息广播成员方法，
      发送到所有客户端*/
                                    sendClients(line);
                                      /*如果关键字是QUIT，则是客户端发送的退出信息*/
                          } else if(keyword.equalsIgnoreCase("QUIT")){
                                  /*发送同意断开信息到客户端*/
      send("QUIT");
      /*关闭连接，并更新客户列表信息*/
                                  disconnect(this);
                                  notifyRoom();
                                  /*结束当前线程*/
                                  this.stop();
                                }
                      }
                  }
      }
      public  boolean  checkName(Client newClient){
           for(int i=0;i<clients.size();i++){
                /*取出每一个连接对象元素*/
                   Client c=(Client)clients.elementAt(i);
                /*如果不是对象自身但名字相同，则表明出现了重复名称*/
                   if((c!=newClient)&&(c.name).equals(newClient.name))
                      return false;
    }
    return true;
}
  public void  notifyRoom(){
             /*服务器发送到客户的信息字符串，“PEOPLE”表示是客户列表信息*/
  String people="PEOPLE";
             for(int i=0;i<clients.size();i++){
                   /*获取每一个服务器—客户交互信息线程*/
                  Client c=(Client)clients.elementAt(i);
                  /*将用户名称添加到发送信息字符串*/
              people+=":"+c.name;
             }
          /*调用信息广播成员方法，将用户列表信息发送到所有客户端*/
             sendClients(people);
  }
  public void sendClients(String msg){
          for(int i=0;i<clients.size();i++){
                  /*获取每一个服务器—客户交互信息线程*/
                  Client c=(Client)clients.elementAt(i);
                  /*通过线程的发送方法将信息发送出去*/
                  c.send(msg);
          }
  }
  public void disconnect(Client c){
             try{
               jTextArea1.append(c.name+"断开连接\n");
          /*向客户发送断开信息*/
                    c.send("QUIT");
               clients.removeElement(c);
               c.socket.close();//断开连接
             }catch(IOException e) {
              jTextArea2.append("客户断开错误\n");
             }
  }

  void jButton1_actionPerformed(ActionEvent e) {
    try {
//打开服务器端口
            server = new ServerSocket(Integer.parseInt(jTextField1.getText()));      						jTextArea2.append("系统提示:聊天服务器系统开始启动...... \n");
    } catch (IOException e1) {   //捕捉可能产生的异常
             jTextArea2.append("服务器端口打开出错\n");
    }
    if (server != null) {
                /*开始用户连接*/
            ConnectSocket connect=new ConnectSocket();
            connect.start();
         }

  }

}

class MainFrame_jButton1_actionAdapter implements java.awt.event.ActionListener {
  MainFrame adaptee;

  MainFrame_jButton1_actionAdapter(MainFrame adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}