making zip file at runtime

[Kavita Ghia]

Hello Friends,
I have two files one is with extension ".exe" and other is with extension ".txt" i.e
1) file1.exe
2) file2.txt
I want to make this file into zip format. This will be achieve during run-time.I have written one "Servlet" in which i'm using ZipEntry class.But i'm unable to do so.
Thanks in advance,
Kavita.

[Frank Carver]

You say you are unable to use the ZipEntry class - why not? what is wrong?

[Carl Trusiak]

Here is a class that I use to zip all the log files in a directory

package com.lendersservice.arc;
import java.util.zip.*;
import java.io.*;
import java.util.Date;
import java.text.SimpleDateFormat;
public class ArchiveLogs extends Object {
  public ArchiveLogs() {
  }
  public static void main(String args[])
  {
      FilenameFilter select = new FileListFilter("", "log");
      String directory = "E:\\orant\\ows\\admin\\website40\\log\\";
      ZipOutputStream out = null;
     try
     {
      File myDir = new File(directory);
      String[] contents = myDir.list(select);
      System.out.println("Processing files from " + myDir.getName());
      if (contents != null)
      {
       //create the zip file
       SimpleDateFormat df = new SimpleDateFormat("MMddyyyy");
       Date today = new Date();
       String outFilename = "logsfor" + df.format(today) + ".zip";
       out = new ZipOutputStream(
       new FileOutputStream(outFilename));
          for (int i = 0 ; i < contents.length ; i++)
          {
              System.out.println(contents[i]);
              processFile(myDir, contents[i], out );
           }
      }
     out.close();
      }
      catch (Exception e)
      {
      System.out.println("Error ::" + e);
      }
  }
  static void processFile(File myDir, String fileName, ZipOutputStream out)
  {
   try
   {
      File f = new File(myDir, fileName);
     FileInputStream in = new FileInputStream(f);
     // Add ZIP entry to output stream.
     out.putNextEntry(new ZipEntry(fileName));
     byte[] buf = new byte[1024];
     int len;
       while ((len = in.read(buf)) > 0) {
           out.write(buf, 0, len);
       }
     out.closeEntry();
     in.close();
     f.delete();
      }
      catch (Exception e)
      {
      System.out.println("Error ::" + e);
      }
  }
}

hope this helps

[Kavita Ghia]

Thanks Carl your code has helped.