Java tutorial
//package com.java2s; /* * Copyright (C) 2008 Yohan Liyanage. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.util.zip.Inflater; public class Main { /** * Decompresses the given byte[] and returns the Object. * * @param <T> Type of expected Object * @param bytes compressed byte[] * @param bufferSize size of buffer to be used (in bytes) * * @return decompressed Object * * @throws IOException if failed to decompress * @throws ClassCastException if cannot cast to specified type */ @SuppressWarnings("unchecked") /* Ignore Unchecked Cast Warning */ public static <T> T decompress(byte[] bytes, int bufferSize) throws IOException, ClassCastException { try { ByteArrayOutputStream bos = new ByteArrayOutputStream(bufferSize); Inflater inflater = new Inflater(); inflater.setInput(bytes); // Decompress byte[] buf = new byte[bufferSize]; while (!inflater.finished()) { int count = inflater.inflate(buf); bos.write(buf, 0, count); } ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bos.toByteArray())); return (T) ois.readObject(); } catch (Exception e) { throw new IOException(e); } } }