Java tutorial
//package com.java2s; /* * Copyright (C) 2008-2014 by Holger Arndt * * This file is part of the Universal Java Matrix Package (UJMP). * See the NOTICE file distributed with this work for additional * information regarding copyright ownership and licensing. * * UJMP is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * UJMP is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with UJMP; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301 USA */ import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.zip.Deflater; public class Main { public static byte[] zipCompress(byte[] input) { return zipCompress(input, Deflater.DEFAULT_COMPRESSION); } public static byte[] zipCompress(byte[] input, int level) { Deflater compressor = new Deflater(); compressor.setLevel(level); compressor.setInput(input); compressor.finish(); ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length); byte[] buf = new byte[1024]; while (!compressor.finished()) { int count = compressor.deflate(buf); bos.write(buf, 0, count); } try { bos.close(); } catch (IOException e) { } return bos.toByteArray(); } }