frame1.java~35~

很好得jbuilder100例源代码

package zipfiles;

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

public class Frame1 extends JFrame {
  JPanel contentPane;
  VerticalFlowLayout verticalFlowLayout1 = new VerticalFlowLayout();
  Button button1 = new Button();
  Button button2 = new Button();
  Label label1 = new Label();
  File source = null , target = null;

  /**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();
    button1.setLabel("选择文件");
    button1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button1_actionPerformed(e);
      }
    });
    contentPane.setLayout(verticalFlowLayout1);
    this.setResizable(false);
    this.setSize(new Dimension(350, 151));
    this.setTitle("压缩文件演示程序");
    button2.setLabel("输出压缩文件");
    button2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        button2_actionPerformed(e);
      }
    });
    label1.setText("所选择的文件：");
    verticalFlowLayout1.setAlignment(VerticalFlowLayout.MIDDLE);
    verticalFlowLayout1.setHgap(15);
    verticalFlowLayout1.setVgap(15);
    contentPane.add(button1, null);
    contentPane.add(button2, null);
    contentPane.add(label1, 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 button1_actionPerformed(ActionEvent e) {
    JFileChooser jfc = new JFileChooser();
    String filepath = null;
    int returnVal = jfc.showOpenDialog(this);
    if(returnVal == JFileChooser.APPROVE_OPTION){
     source = jfc.getSelectedFile();
     filepath = source.getPath();
     label1.setText("所选择的文件："+filepath);
    }
  }

  void button2_actionPerformed(ActionEvent e) {
    JFileChooser jfc = new JFileChooser();
    //ExtensionFileFilter filter = new ExtensionFileFilter();
    //FileFilter filter = new FileFilter();
    //filter.addExtension("zip");
    //filter.setDescription("ZIP Files");
    //jfc.setFileFilter(filter);
    String filepath = null;
    int returnVal = jfc.showSaveDialog(this);
    if(returnVal == JFileChooser.APPROVE_OPTION){
     target = jfc.getSelectedFile();
     filepath = target.getPath();
     label1.setText("正在压缩文件："+filepath+"...");
     zipFile(target);
    }
    }

    private void zipFile(File target){
      if(source !=null){
      try{
        FileOutputStream f =  new FileOutputStream(target);
        ZipOutputStream out = new ZipOutputStream(new DataOutputStream(f));
        DataInputStream in = new DataInputStream(new FileInputStream(source));
        out.putNextEntry(new ZipEntry(source.getPath()));
        int c;
        while((c = in.read()) != -1)
          out.write(c);
        in.close();
        out.close();
        label1.setText("文件压缩成功："+target.getPath());
      }catch(Exception e){
        label1.setText("文件压缩失败："+target.getPath());
        }
      }
      else
        label1.setText("请先选择一个需要压缩的文件");
   }
}