Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * 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.
 */

import java.io.ByteArrayOutputStream;
import java.io.IOException;

import java.util.zip.Deflater;

public class Main {
    /**
     * Compress the byte array passed
     * <p>
     * @param input byte array
     * @return compressed byte array
     * @throws IOException thrown if we can't close the output stream
     */
    public static byte[] compressByteArray(byte[] input) throws IOException {
        return compressByteArray(input, 1024);
    }

    /**
     * Compress the byte array passed
     * <p>
     * @param input byte array
     * @param bufferLength buffer length
     * @return compressed byte array
     * @throws IOException thrown if we can't close the output stream
     */
    public static byte[] compressByteArray(byte[] input, int bufferLength) throws IOException {
        // Compressor with highest level of compression
        Deflater compressor = new Deflater();
        compressor.setLevel(Deflater.BEST_COMPRESSION);

        // Give the compressor the data to compress
        compressor.setInput(input);
        compressor.finish();

        // Create an expandable byte array to hold the compressed data.
        // It is not necessary that the compressed data will be smaller than
        // the uncompressed data.
        ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);

        // Compress the data
        byte[] buf = new byte[bufferLength];
        while (!compressor.finished()) {
            int count = compressor.deflate(buf);
            bos.write(buf, 0, count);
        }

        // JCS-136 ( Details here : http://www.devguli.com/blog/eng/java-deflater-and-outofmemoryerror/ )
        compressor.end();
        bos.close();

        // Get the compressed data
        return bos.toByteArray();

    }
}