gzip

public class Gzip {

    /**
     * gzip file
    */
    public void gzip(String fis, String fos) {
        try {
            FileInputStream fin = new FileInputStream(fis);
            FileOutputStream fout = new FileOutputStream(fos);
            GZIPOutputStream gzout = new GZIPOutputStream(fout);
            byte[] buf = new byte[1024];// 
            int num;

            while ((num = fin.read(buf)) != -1) {
                gzout.write(buf, 0, num);
            }
            gzout.close();// !!!Don't forget to release the source
            fout.close();
            fin.close();
        } catch (IOException e) {
            System.out.println(e);
        }
    }
    
    /**
     * extract file from gzip
    */
    public void unzip(String fis, String fos) {
        try {
            FileInputStream fin = new FileInputStream(fis);
            GZIPInputStream gzin = new GZIPInputStream(fin);
            FileOutputStream fout = new FileOutputStream(fos);
            byte[] buf = new byte[1024];
            int num;
            while ((num = gzin.read(buf, 0, buf.length)) != -1) {
                fout.write(buf, 0, num);
            }
            gzin.close();
            fout.close();
            fin.close();
        } catch (IOException e) {
            System.out.println(e);
        }
    }
    
    public static void main(String[] args) throws FileNotFoundException {
        String path="/home/siya/local/test";
        String file="localfile";
        String gzfile="localfile.gz";
        String fis=path+File.separator+file;
        String fos=path+File.separator+gzfile;
//        new Gzip().unzip(fis, fos);
        new Gzip().gzip(fis, fos);
    }
    
}