JAVA EE: Java Tutorial : Java IO (Java File - How to decompress file from GZIP file)

Thursday 24 November 2016

Java Tutorial : Java IO (Java File - How to decompress file from GZIP file)

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https://www.youtube.com/watch?v=wOkniKnIK94&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java IO (Java File - How to decompress file from GZIP file)

GZipDemo.java

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;

public class GZipDemo
{

    public static void main(String[] args) throws IOException
    {
        String inputGzipFile = "D:/work/Helloworld.gz";
        String dstFile = "D:/work/Helloworld.java";

        GZipDemo gzipDemo = new GZipDemo();
        gzipDemo.deCompress(inputGzipFile, dstFile);
    }

    public void deCompress(String inputGzipFile, String dstFile) throws IOException
    {

        byte[] buffer = new byte[1024];

        /*
         * If the Streams are within the
         * "try-With-Resources" block, then it will be
         * closed automatically.
         */
        try (
                FileInputStream fis = new FileInputStream(inputGzipFile);
                GZIPInputStream gzis = new GZIPInputStream(fis);
                FileOutputStream out = new FileOutputStream(dstFile);)
        {

            int len;
            while ((len = gzis.read(buffer)) > 0)
            {
                out.write(buffer, 0, len);
            }

            System.out.println("Decompression is done..");

        }
    }
}