decompress byte array - Java File Path IO

Java examples for File Path IO:Byte Array

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Description

decompress byte array

Demo Code

/**//from  ww w  . j a  v  a  2s  . co m
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
//package com.java2s;

import java.util.zip.DataFormatException;
import java.util.zip.Inflater;

import java.io.*;

public class Main {
    public static void main(String[] argv) throws Exception {
        byte[] compressedData = new byte[] { 34, 35, 36, 37, 37, 37, 67,
                68, 69 };
        System.out.println(java.util.Arrays
                .toString(decompress(compressedData)));
    }

    public static byte[] decompress(byte[] compressedData, int off, int len)
            throws IOException, DataFormatException {
        // Create the decompressor and give it the data to compress
        Inflater decompressor = new Inflater();
        decompressor.setInput(compressedData, off, len);

        // Create an expandable byte array to hold the decompressed data
        ByteArrayOutputStream bos = new ByteArrayOutputStream(
                compressedData.length);

        // Decompress the data
        byte[] buf = new byte[1024];
        while (!decompressor.finished()) {
            int count = decompressor.inflate(buf);
            bos.write(buf, 0, count);
        }
        bos.close();

        // Get the decompressed data
        return bos.toByteArray();
    }

    public static byte[] decompress(byte[] compressedData)
            throws IOException, DataFormatException {
        return decompress(compressedData, 0, compressedData.length);
    }

    public static byte[] toByteArray(int i) {
        byte[] bytes = new byte[4];
        bytes[0] = (byte) ((i >>> 24) & 0xFF);
        bytes[1] = (byte) ((i >>> 16) & 0xFF);
        bytes[2] = (byte) ((i >>> 8) & 0xFF);
        bytes[3] = (byte) (i & 0xFF);
        return bytes;
    }
}

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