1   
2   
3   // This code shows how to zip multiple files 
4   
5   import java.awt.*;
6   import java.awt.event.*;
7   import javax.swing.*;
8   import java.util.zip.*  ;
9   import java.io.*;
10  
11  
12    void jButton1_actionPerformed(ActionEvent e) {
13      JFileChooser jFileChooser1 = new JFileChooser();
14      jFileChooser1.setMultiSelectionEnabled(true);
15      jFileChooser1.setDialogTitle("Select files to Zip");
16      jFileChooser1.setApproveButtonText("Zip It!");
17      File[] slFiles={}; //creates an empty array of files
18      if (JFileChooser.APPROVE_OPTION == jFileChooser1.showOpenDialog(this)) {
19           slFiles  =  jFileChooser1.getSelectedFiles(); 
20           
21         }
22         this.repaint();
23  
24  if (slFiles.length>0 ){
25           // Create a buffer for reading the files
26           byte[] buf = new byte[8192];
27     
28           try {
29             // Create the ZIP file
30             String outFilename = "c:\\files.zip";//set output file
31             ZipOutputStream out = new ZipOutputStream(new FileOutputStream(
32                 outFilename));
33     
34             // Compress the files
35             for (int i = 0; i < slFiles.length; i++) {
36               FileInputStream in = new FileInputStream(slFiles[i].getName());
37     
38               // Add ZIP entry to output stream.
39               out.putNextEntry(new ZipEntry(slFiles[i].getName()));
40     
41               // Transfer bytes from the file to the ZIP file
42               int len;
43               while ( (len = in.read(buf)) > 0) {
44                 out.write(buf, 0, len);
45               }
46     
47               // Complete the entry
48               out.closeEntry();
49               in.close();
50             }
51     
52             // Complete the ZIP file
53             out.close();
54           }
55           catch (IOException e1) {
56           }
57         }
58    }   
59  
60