frame1.java~15~

关于internet的程序源码

package urlconnection;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;
import java.net.*;
import java.io.*;

public class Frame1 extends JFrame {
  JPanel contentPane;
  XYLayout xYLayout1 = new XYLayout();
  JButton jButton1 = new JButton();
  JTextField jTextField1 = new JTextField();
  JScrollPane jScrollPane1 = new JScrollPane();
  JTextArea jTextArea1 = new JTextArea();
  JLabel jLabel1 = new JLabel();

  //Construct the frame
  public Frame1() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    jButton1.setText("查询网页信息");
    jButton1.addActionListener(new Frame1_jButton1_actionAdapter(this));
    contentPane.setLayout(xYLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("Frame Title");
    jTextField1.setText("http://news.sina.com.cn:80/index.html");
    jTextArea1.setText("jTextArea1");
    contentPane.add(jButton1,new XYConstraints(276, 33, 104, 29));
    contentPane.add(jTextField1, new XYConstraints(15, 25, 238, 46));
    contentPane.add(jScrollPane1,new XYConstraints(22, 74, 357, 182));
    contentPane.add(jLabel1, new XYConstraints(24, 261, 305, 26));
    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{
      StringBuffer buf = new StringBuffer();
      //打开URLConnection 类读取
      URL myurl = new URL("http://news.sina.com.cn:80/index.html");
      URLConnection uc = myurl.openConnection();
      InputStream raw = uc.getInputStream();
      InputStream buffer = new BufferedInputStream(raw);
      //将InputStream与一个Reader链接
      Reader r = new InputStreamReader(buffer);
      int c;
      while((c = r.read()) != -1){
        buf.append((char)c);
      }
      jTextArea1.append(buf.toString());
      jLabel1.setText("访问的host是:"+myurl.getHost()+"\n");
    }
    catch(IOException ex){
      ex.printStackTrace();
    }
  }
}

class Frame1_jButton1_actionAdapter implements java.awt.event.ActionListener {
  Frame1 adaptee;

  Frame1_jButton1_actionAdapter(Frame1 adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}