mainframe.java

采用Java语言进行网络编程实现

package multiclient;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.net.*;   //引入网络包，以实现套接字连接
import java.io.*;   //引入输入输出流包，以进行数据的读写

/**
 * <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 {
  JPanel contentPane;
  JLabel jLabel1 = new JLabel();
  JTextField jTextField1 = new JTextField();
  JLabel jLabel2 = new JLabel();
  JTextField jTextField2 = new JTextField();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  JTextField jTextField3 = new JTextField();
  JScrollPane jScrollPane1 = new JScrollPane();
  JTextArea jTextArea1 = new JTextArea();
  Socket socket;
  BufferedReader cin;
  PrintStream cout;

  //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();
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 16));
    jLabel1.setText("服务器IP");
    jLabel1.setBounds(new Rectangle(21, 17, 68, 32));
    contentPane.setLayout(null);
    this.setSize(new Dimension(453, 323));
    this.setTitle("多客户信息交互系统-客户端");
    jTextField1.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextField1.setText("127.0.0.1");
    jTextField1.setBounds(new Rectangle(92, 17, 105, 32));
    jLabel2.setBounds(new Rectangle(206, 17, 42, 32));
    jLabel2.setText("端口");
    jLabel2.setFont(new java.awt.Font("Dialog", 0, 16));
    jTextField2.setBounds(new Rectangle(241, 17, 60, 32));
    jTextField2.setText("6544");
    jTextField2.setFont(new java.awt.Font("Dialog", 0, 16));
    jButton1.setBounds(new Rectangle(320, 17, 114, 32));
    jButton1.setFont(new java.awt.Font("Dialog", 0, 16));
    jButton1.setText("连接服务器");
    jButton1.addActionListener(new MainFrame_jButton1_actionAdapter(this));
    jButton2.setText("发送信息");
    jButton2.addActionListener(new MainFrame_jButton2_actionAdapter(this));
    jButton2.setFont(new java.awt.Font("Dialog", 0, 16));
    jButton2.setBounds(new Rectangle(320, 65, 114, 32));
    jTextField3.setBounds(new Rectangle(20, 63, 279, 32));
    jTextField3.setText("Hello,everybody");
    jTextField3.setFont(new java.awt.Font("Dialog", 0, 16));
    jScrollPane1.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);
    jScrollPane1.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
    jScrollPane1.setBounds(new Rectangle(21, 101, 411, 186));
    jTextArea1.setText("");
    contentPane.add(jLabel1, null);
    contentPane.add(jTextField1, null);
    contentPane.add(jTextField2, null);
    contentPane.add(jLabel2, null);
    contentPane.add(jButton1, null);
    contentPane.add(jButton2, null);
    contentPane.add(jTextField3, null);
    contentPane.add(jScrollPane1, 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);
    }
  }

  void jButton1_actionPerformed(ActionEvent e) {
    try {
                /*获得服务器IP*/
                InetAddress ip=InetAddress.getByName(jTextField1.getText());
                /*获得服务器端口*/
                int port=Integer.parseInt(jTextField2.getText());
                /*尝试与服务器进行连接，建立套接字*/
              socket= new Socket(ip,port);
              jTextArea1.append("系统提示:与聊天服务器系统开始连接...... \n");
    } catch (IOException e1) {   //捕捉套接字建立时可能产生的异常
              jTextArea1.append("服务器端口打开出错\n");
    }
    if (socket != null) {  //套接字建立成功
              try {
                cin=new BufferedReader(new InputStreamReader(socket.getInputStream()));
                cout = new PrintStream(socket.getOutputStream());
                /*构建发送信息*/
                 String str = "来自"+InetAddress.getLocalHost().toString()+"的连接信息";
                /*将信息发送到服务器*/
                 cout.println(str);
                 jTextArea1.append("向服务器发送如下的信息:"+str+"\n");
                 ReadMessageThread readThread=new ReadMessageThread();
                 /*通过start方法，让线程进入可运行状态*/
                 readThread.start();
              }catch(IOException e3) {   //捕捉可能产生的异常
                jTextArea1.append("输入输出异常\n");
              }
    }
  }

  void jButton2_actionPerformed(ActionEvent e) {
    String str=jTextField3.getText();
    jTextArea1.append("向服务器发送如下的信息:"+str+"\n");
    cout.println(str);

  }
  class ReadMessageThread extends Thread{
      /*覆盖Thread类的run方法，在该方法中，循环从端口读入信息，
      直到读入“QUIT”，则关闭套接字*/
      public void run(){
            String str="";
            while(true){
                try{
                    str = cin.readLine();  //读入信息
                 }catch (IOException e){
                    jTextArea1.append("输入输出异常\n");
                 }
                if (str.equals("QUIT")){  //若为“QUIT”，则关闭套接字，跳出循环
                    try{
                          socket.close();
                           jTextArea1.append("用户连接已关闭\n");
                     }catch (IOException e){
                              jTextArea1.append("套接字关闭异常\n");
                     }
                    break;
                    } else          //不是QUIT信息，则将读入的信息进行显示
                              jTextArea1.append("从服务器端读入如下的信息:"+str+"\n");
              }
      }
}

}

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);
  }
}

class MainFrame_jButton2_actionAdapter implements java.awt.event.ActionListener {
  MainFrame adaptee;

  MainFrame_jButton2_actionAdapter(MainFrame adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton2_actionPerformed(e);
  }
}