Java tutorial
//package com.java2s; //License from project: Apache License import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.zip.GZIPInputStream; public class Main { public static final int BUFFER_SIZE = 1024; public static byte[] decompress(byte[] bytes) throws IOException { GZIPInputStream gzip = null; ByteArrayOutputStream baos = null; try { baos = new ByteArrayOutputStream(); gzip = new GZIPInputStream(new ByteArrayInputStream(bytes)); int len = 0; byte data[] = new byte[BUFFER_SIZE]; while ((len = gzip.read(data, 0, BUFFER_SIZE)) != -1) { baos.write(data, 0, len); } gzip.close(); baos.flush(); return baos.toByteArray(); } finally { if (gzip != null) { gzip.close(); } if (baos != null) { baos.close(); } } } }