frame1.java~5~

JBuilder9 精髓 source code1.rar

package urlconnection;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;
import java.net.URL;
import java.io.InputStream;
import java.net.URLConnection;
import java.io.BufferedInputStream;
import java.io.Reader;
import java.io.InputStreamReader;
import java.io.*;

/**
 * <p>Title: an example</p>
 * <p>Description:an  no</p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: home</p>
 * @author liujun
 * @version 1.0
 */

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

  //Construct the frame
  public Frame1() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    //setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));
    contentPane = (JPanel) this.getContentPane();
    jTextField1.setText("http://news.sina.com.cn:80/index.html");
    contentPane.setLayout(xYLayout1);
    this.setSize(new Dimension(400, 309));
    this.setTitle("Frame Title");
    jButton1.setText("查询网页信息");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    jTextArea1.setText(" ");
    contentPane.add(jTextField1,  new XYConstraints(17, 12, 222, 30));
    contentPane.add(jTextArea1,  new XYConstraints(10, 54, 380, 226));
    contentPane.add(jButton1,  new XYConstraints(269, 12, 109, 30));
  }
  //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(jTextField1.getText());
        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());
     }
    catch (IOException ex) {
      ex.printStackTrace();
    }
  }
}