Java BufferedImage to Byte Array imageToBytes(BufferedImage image, String imageFormat)

Description

image To Bytes

License

Apache License

Declaration

public static byte[] imageToBytes(BufferedImage image, String imageFormat) throws IOException 

Method Source Code

//package com.java2s;
/*/*w  w w. j a v a  2  s.  c o  m*/
 * Copyright 2012 buddycloud
 *
 * 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 javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;

import javax.imageio.stream.MemoryCacheImageOutputStream;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;

import java.io.IOException;

public class Main {
    public static byte[] imageToBytes(BufferedImage image, String imageFormat) throws IOException {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();

        ImageWriter writer = ImageIO.getImageWritersByFormatName(imageFormat).next();
        ImageWriteParam param = getParams(writer);
        writer.setOutput(new MemoryCacheImageOutputStream(stream));
        writer.write(null, new IIOImage(image, null, null), param);

        stream.flush();
        byte[] imageInByte = stream.toByteArray();
        stream.close();

        return imageInByte;
    }

    private static ImageWriteParam getParams(ImageWriter writer) {
        ImageWriteParam param = writer.getDefaultWriteParam();
        try {
            // Do not compress before output the file
            param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
            param.setCompressionQuality(1.0f);
        } catch (Throwable ignored) {
            // If the format does not support setting compression mode
        }

        return param;
    }
}

Related

1. imageToByte(BufferedImage bi, String format)
2. imageToByte(BufferedImage image)
3. imageToByte(BufferedImage img)
4. imageToByteArray(BufferedImage o)
5. imageToBytes(BufferedImage image, String encoding)
6. imageToBytes(BufferedImage img, String formatName)
7. toArrayByte(BufferedImage image)
8. toByteArray(BufferedImage image)
9. toByteArray(BufferedImage image, float quality)