Java tutorial
//package com.java2s; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.GZIPOutputStream; public class Main { public static void gzipIt(String inputFile, String outputFile) { byte[] buffer = new byte[1024]; try { GZIPOutputStream gzos = new GZIPOutputStream(new FileOutputStream(outputFile)); FileInputStream in = new FileInputStream(inputFile); int len; while ((len = in.read(buffer)) > 0) { gzos.write(buffer, 0, len); } in.close(); gzos.finish(); gzos.close(); System.out.println("Done"); } catch (IOException ex) { ex.printStackTrace(); } } }