udpchat.java

这是我做的JAVA的socket网络通信源码

package chat;
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class UdpChat extends JFrame {
  JPanel contentPane;
  JScrollPane jScrollPane1 = new JScrollPane();
  JTextArea jTextArea1 = new JTextArea();
  JLabel jLabel1 = new JLabel();
  JTextField jTextField1 = new JTextField();
  JLabel jLabel2 = new JLabel();
  JTextField jTextField2 = new JTextField();
  JLabel jLabel3 = new JLabel();
  JTextField jTextField3 = new JTextField();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();

boolean wait=true;
  DatagramSocket receiveSocket,sendSocket;
  DatagramPacket receivePacket,sendPacket;

  public void receiveMessage(){
   try{
    String hostname;//定義客戶機變量
   //建立端口號為5000的DatagramSocket對象
   receiveSocket=new DatagramSocket(4331);
   byte buf[]=new byte[500];
   //建立datagrampacket對象
   receivePacket=new DatagramPacket(buf,buf.length);
   while(wait=true)
   {
    receiveSocket.receive(receivePacket);//接收數據包
    hostname=receivePacket.getAddress().toString();//獲得主機名
    int port=receivePacket.getPort();//獲得端口號
    jTextArea1.append("端口号为"+port+"的信息：");
    String str=new String(receivePacket.getData(),0,receivePacket.getLength());
    jTextArea1.append(str+"\n");//顯示收到的數據
   }
   }catch(SocketException e){jTextArea1.append(e+"\n");}
catch(IOException e){jTextArea1.append(e+"\n");}
  }

  public void sendMassage()
  {
   //發送數據包
  try{
   String str=jTextField1.getText();
   String ip=jTextField2.getText();//獲得目的地的IP地址
   int port=Integer.parseInt(jTextField3.getText());//獲得端口號
   if(port>=1 && port<=65535)
   {
    jTextArea1.append("发给端口号为"+port+"的消息："+str+"\n");
    byte[] buf=new byte[500];
    //str.getBytes(0,str.length(),buf,0);
    str.getBytes(0,str.length(),buf,0);
    sendPacket=new DatagramPacket(buf,str.length(),InetAddress.getByName(ip),port);
    sendSocket.send(sendPacket);//發送數據包
    jTextField1.setText("");
    jTextField2.setText("");
    jTextField3.setText("");
  }
  }catch(IOException e){jTextArea1.append(e+"\n");}
  }
  //Construct the frame
  public UdpChat() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    contentPane.setBackground(new Color(180, 187, 255));
    contentPane.setFont(new java.awt.Font("Dialog", 0, 12));
    contentPane.setMaximumSize(new Dimension(2147483647, 2147483647));
    contentPane.setLayout(null);
    this.setSize(new Dimension(400, 300));
    this.setTitle("UDP聊天程序");
    jScrollPane1.setBounds(new Rectangle(10, 8, 378, 133));
    jTextArea1.setText("");
    jLabel1.setFont(new java.awt.Font("Dialog", 0, 12));
    jLabel1.setRequestFocusEnabled(true);
    jLabel1.setVerifyInputWhenFocusTarget(true);
    jLabel1.setText("IP地址");
    jLabel1.setBounds(new Rectangle(9, 150, 36, 21));
    jTextField1.setText("");
    jTextField1.setBounds(new Rectangle(47, 150, 137, 29));
    jLabel2.setFont(new java.awt.Font("Dialog", 0, 12));
    jLabel2.setText("端口号");
    jLabel2.setBounds(new Rectangle(214, 150, 48, 24));
    jTextField2.setText("");
    jTextField2.setBounds(new Rectangle(270, 150, 106, 28));
    jLabel3.setFont(new java.awt.Font("Dialog", 0, 12));
    jLabel3.setRequestFocusEnabled(true);
    jLabel3.setText("发送信息");
    jLabel3.setBounds(new Rectangle(4, 195, 53, 20));
    jTextField3.setText("");
    jTextField3.setBounds(new Rectangle(62, 193, 327, 33));
    jTextField3.addKeyListener(new UdpChat_jTextField3_keyAdapter(this));
    jButton1.setBounds(new Rectangle(6, 248, 98, 29));
    jButton1.setFont(new java.awt.Font("Dialog", 0, 12));
    jButton1.setText("发送");
    jButton1.addActionListener(new UdpChat_jButton1_actionAdapter(this));
    jButton2.setBounds(new Rectangle(216, 251, 107, 31));
    jButton2.setFont(new java.awt.Font("Dialog", 0, 12));
    jButton2.setToolTipText("");
    jButton2.setText("退出");
    jButton2.addActionListener(new UdpChat_jButton2_actionAdapter(this));
    contentPane.add(jScrollPane1, null);
    contentPane.add(jLabel1, null);
    contentPane.add(jTextField1, null);
    contentPane.add(jLabel2, null);
    contentPane.add(jTextField2, null);
    contentPane.add(jLabel3, null);
    contentPane.add(jTextField3, null);
    contentPane.add(jButton1, null);
    contentPane.add(jButton2, null);
    jScrollPane1.getViewport().add(jTextArea1, null);

    receiveMessage();
  }
  //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) {
sendMassage();
  }

  void jButton2_actionPerformed(ActionEvent e) {
 wait=false;
 System.exit(0);
  }

  void jTextField3_keyPressed(KeyEvent e) {
if(e.getKeyChar()==KeyEvent.VK_ENTER)
    {
     sendMassage();
    }
  }
}

class UdpChat_jButton1_actionAdapter implements java.awt.event.ActionListener {
  UdpChat adaptee;

  UdpChat_jButton1_actionAdapter(UdpChat adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}

class UdpChat_jButton2_actionAdapter implements java.awt.event.ActionListener {
  UdpChat adaptee;

  UdpChat_jButton2_actionAdapter(UdpChat adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton2_actionPerformed(e);
  }
}

class UdpChat_jTextField3_keyAdapter extends java.awt.event.KeyAdapter {
  UdpChat adaptee;

  UdpChat_jTextField3_keyAdapter(UdpChat adaptee) {
    this.adaptee = adaptee;
  }
  public void keyPressed(KeyEvent e) {
    adaptee.jTextField3_keyPressed(e);
  }
}