How to decompress gzip file in java

In this tutorial you will see the use of GZIPInputStream for decompress gzip file.

In this tutorial you will see the use of GZIPInputStream for decompress gzip file.

How to decompress a GZIP file.

In this tutorial, we will discuss about how to decompress a GZIP file. The java.util.zip package provide a class named GZIPInputStream. The GZIPInputStream class create a output stream for reading compress data and decompress GZIP.

About GZIPInputStream API:

Return Type	Method	Description
void	close()	The close() is use to close all stream.
int	read()	The read() method read and decompress GZIP data from associated stream.

Code


import java.util.zip.*;

import java.io.FileOutputStream;

import java.io.FileInputStream;

import java.util.zip.GZIPInputStream;

import java.io.IOException;





public class UnGzip{

  public static void main(String args[]){

    try{

     

         String source = "dd.txt.gz";

   String outFilename = source +".txt";

     System.out.println("File for Extracting :
"+source);

         FileInputStream instream= new FileInputStream(source);

         GZIPInputStream ginstream =new GZIPInputStream(instream);

         FileOutputStream outstream = new FileOutputStream(outFilename);

         byte[] buf = new byte[1024]; 

         int len;

         while ((len = ginstream.read(buf)) > 0) 

        {

          outstream.write(buf, 0, len);

        }

   System.out.println("File Successfylly Extract");

     System.out.println("Extract
file : "+outFilename);

        ginstream.close();

        outstream.close();

      }

    

    catch(IOException ioe){

      System.out.println("Exception has been thrown" + ioe);

    }

  }

}

Output

C:\>java UnGzip
File for Extracting : dd.txt.gz
File Successfylly Extract
Extract File : dd.txt.gz.txt
C:\Work\Bharat\Roseindi_Tutorial\Zip_api\GzipUncopresser>

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