Extract .Z files

Hi All,

Is there any Java Library that Support Extracting .Z Files ?

Hi,

You can try with 7-Zip JBinding which uses the 7zip library internally. It's quite easy to use.

This can be downloaded from www.sourceforge.net

Ifteqar Ahmed wrote:
Hi,

You can try with 7-Zip JBinding which uses the 7zip library internally. It's quite easy to use.

This can be downloaded from www.sourceforge.net

do you mean that i will call 7-zip program and then path .Z file path to it or there is a library in java that can handle that?

Can you Explain More Please?

This is the correct link.

Rob Spoor wrote:
This is the correct link.

I can not use it How can I use it?

Ahmed Kotb wrote:How can I use it?

A link?

Ahmed Kotb, you can use the a mix of File and ZipEntry...

Already I done something like to do a download .zip file...
But, what do you need to do exactly?

Hugs

Leonardo Jose Gomes da Silva wrote:
Ahmed Kotb, you can use the a mix of File and ZipEntry...

Already I done something like to do a download .zip file...
But, what do you need to do exactly?

I want Library(JAR) that I can use it to Extract any .Z File or any Method that help me to Extract .Z files

Ahmed Kotb wrote:

Leonardo Jose Gomes da Silva wrote:
Ahmed Kotb, you can use the a mix of File and ZipEntry...

Already I done something like to do a download .zip file...
But, what do you need to do exactly?

I want Library(JAR) that I can use it to Extract any .Z File or any Method that help me to Extract .Z files

Okay, look this example:

import java.io.*;
import java.util.zip.*;

class  ZipFileUtils {

public static void main(String[] args) {
         if (args.length != 1){
            System.out.println("Usage: java testFiles [zipfile path] ");
            return;
        }try{
            String filename = args[0];
            testZipFiles list = new testZipFiles( );
            list.getZipFiles(filename);
        }catch (Exception e){
            e.printStackTrace();
        }
    }

public void getZipFiles(String filename){
        try{
            String destinationname = "c:\\servlet\\testZip\\";
            byte[] buf = new byte[1024];
            ZipInputStream zipinputstream = null;
            ZipEntry zipentry;
            zipinputstream = new ZipInputStream(
                new FileInputStream(filename));

zipentry = zipinputstream.getNextEntry();
            while (zipentry != null) { 
                //for each entry to be extracted
                String entryName = zipentry.getName();
                System.out.println("entryname "+entryName);
                int n;
                FileOutputStream fileoutputstream;
                File newFile = new File(entryName);
                String directory = newFile.getParent();
                
                if(directory == null){
                    if(newFile.isDirectory())
                        break;
                }
                
                fileoutputstream = new FileOutputStream(destinationname+entryName);

while ((n = zipinputstream.read(buf, 0, 1024)) > -1)
                    fileoutputstream.write(buf, 0, n);

fileoutputstream.close(); 
                zipinputstream.closeEntry();
                zipentry = zipinputstream.getNextEntry();

}
            zipinputstream.close();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}

Hugs

Leonardo Jose Gomes da Silva

It Doesn't work with .Z files , it Only works with .ZIP files.....I need to Extract .Z files not .ZIP

.Z files are not ZIP files, they're created using the compress tool. Java can't handle .Z out of the box, and neither can the Apache Commons Compress library.

Tim Moores
.Z files are not ZIP files, they're created using the compress tool. Java can't handle .Z out of the box, and neither can the Apache Commons Compress library.

Sorry but you mean that there no way to Extract .Z files from Java???

Of course it's possible. But -.Z not being a common file format any more- there is no widely used Java library for that (or maybe no library at all). In which case you would have to code it, or find a command you could call via the ProcessBuilder class. The UnxUtils contain such a tool for Windows, as does every Unix/Linux distribution in existence out of the box.

I can clearly remember someone mentioning 7-Zip JBinding in this thread, and me linking to the SourceForge project

That one uses 7-Zip through JNI.

Of course 7-Zip is open source so it shouldn't be too hard to write a pure Java library for it. It will probably just require quite a bit of work.

Thanks to All

I solved it by Executing gunzip Command on Linux and winrare on Windows with RunTime Object from Java. I know that this is not the Optimum Solution but it works for now.