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How to convert Image to Byte Array in java?
Java provides ImageIO class for reading and writing an image. To convert an image to a byte array –
- Read the image using the read() method of the ImageIO class.
- Create a ByteArrayOutputStream object.
- Write the image to the ByteArrayOutputStream object created above using the write() method of the ImageIO class.
- Finally convert the contents of the ByteArrayOutputStream to a byte array using the toByteArray() method.
Example
import java.io.ByteArrayOutputStream; import java.awt.image.BufferedImage; import java.io.File; import javax.imageio.ImageIO; public class ImageToByteArray { public static void main(String args[]) throws Exception{ BufferedImage bImage = ImageIO.read(new File("sample.jpg")); ByteArrayOutputStream bos = new ByteArrayOutputStream(); ImageIO.write(bImage, "jpg", bos ); byte [] data = bos.toByteArray(); } }
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