Java Image to Byte Array bufferedImageToBytes(final BufferedImage bufferedImage, final ImageWriter imageWriter, final ImageWriteParam imageWriteParameter)

Description

Converts a BufferedImage into bytes using a specific image writer, and image write parameters

License

Open Source License

Parameter

Parameter	Description
bufferedImage	The BufferedImage to be converted to bytes
imageWriter	Writer responsible for the conversion
imageWriteParameter	Controls image writing parameters, e.g. transparency, compression, etc

Exception

Parameter	Description
IOException	Throws if image writing fails

Return

The image as an array of bytes

Declaration

public static byte[] bufferedImageToBytes(final BufferedImage bufferedImage, final ImageWriter imageWriter,
        final ImageWriteParam imageWriteParameter) throws IOException 

Method Source Code

//package com.java2s;
/*  Copyright (C) 2014 Reinventing Geospatial, Inc
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.//from w  w w.  j av  a  2 s  . c om
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>,
 *  or write to the Free Software Foundation, Inc., 59 Temple Place -
 *  Suite 330, Boston, MA 02111-1307, USA.
 */

import java.awt.image.BufferedImage;

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

import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.stream.MemoryCacheImageOutputStream;

public class Main {
    /**
     * Converts a {@link BufferedImage} into bytes using a specific image
     * writer, and image write parameters
     *
     * @param bufferedImage
     *             The {@link BufferedImage} to be converted to bytes
     * @param imageWriter
     *             Writer responsible for the conversion
     * @param imageWriteParameter
     *             Controls image writing parameters, e.g. transparency, compression, etc
     * @return The image as an array of bytes
     * @throws IOException
     *             Throws if image writing fails
     */
    public static byte[] bufferedImageToBytes(final BufferedImage bufferedImage, final ImageWriter imageWriter,
            final ImageWriteParam imageWriteParameter) throws IOException {
        if (bufferedImage == null) {
            throw new IllegalArgumentException("Buffered image may not be null");
        }

        if (imageWriter == null) {
            throw new IllegalArgumentException("Image writer may not be null");
        }

        try (final ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                final MemoryCacheImageOutputStream memoryCacheImage = new MemoryCacheImageOutputStream(
                        outputStream)) {
            imageWriter.setOutput(memoryCacheImage);

            imageWriter.write(null, new IIOImage(bufferedImage, null, null), imageWriteParameter);

            outputStream.flush();

            return outputStream.toByteArray();
        }
    }

    /**
     * Converts a {@link BufferedImage} into bytes using an image writer that
     * corresponds to the specified output format
     *
     * @param bufferedImage
     *             The {@link BufferedImage} to be converted to bytes
     * @param outputFormat
     *             A string containing the informal name of the format.  See {@link ImageIO#write(RenderedImage, String, OutputStream)}
     * @return The image as an array of bytes
     * @throws IOException
     *             Throws if image writing fails
     */
    public static byte[] bufferedImageToBytes(final BufferedImage bufferedImage, final String outputFormat)
            throws IOException {
        if (bufferedImage == null) {
            throw new IllegalArgumentException("Buffered image may not be null");
        }

        if (outputFormat == null) {
            throw new IllegalArgumentException("Output format may not be null");
        }

        try (@SuppressWarnings("resource")
        final ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
            if (!ImageIO.write(bufferedImage, outputFormat, outputStream)) {
                throw new IOException(
                        String.format("No appropriate image writer found for format '%s'", outputFormat));
            }

            return outputStream.toByteArray();
        }
    }
}

Related

1. bufferedImageToByte(BufferedImage image, String format)
2. bufferedImageToByte(BufferedImage originalImage)
3. bufferedImageToByteArray(BufferedImage bufferedImage)
4. bufferedImageToByteArray(BufferedImage image)
5. bufferedImageToByteArray(BufferedImage img)
6. toByteArray(Image image)
7. toByteArray(Image img)