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convert BufferedImage to byte[]

How to convert BufferedImage to byte[] in Java

Often times, you need to convert BufferedImage to byte array in order to store the image into database , or some other purpose. Some conversion is required as follow :

BufferedImage originalImage = ImageIO.read(new File("c:\\image\\mypic.jpg"));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write( originalImage, "jpg", baos );
baos.flush();
byte[] imageInByte = baos.toByteArray();
baos.close();

Example
This class will load an image from “c:\\image\\mypic.jpg”, use ImageIO.write to write the BufferedImage into ByteArrayOutputStream object and convert it to byte array.

import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;

public class ImageTest {

   public static void main(String [] args){

   try{

    BufferedImage originalImage =
                              ImageIO.read(new File("c:\\image\\mypic.jpg"));

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ImageIO.write( originalImage, "jpg", baos );
    baos.flush();
    byte[] imageInByte = baos.toByteArray();
    baos.close();

    }catch(IOException e){
        System.out.println(e.getMessage());
    }
   }
}
Tags: java