The conversion from byte[] to BufferedImage is involved InputStream and ImageIO.read as follow :

InputStream in = new ByteArrayInputStream(imageInByte);
BufferedImage bImageFromConvert = ImageIO.read(in);

Example

This class will read an image file, convert it to byte array , and then convert it back to BufferedImage, finally save it to a new location.

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import javax.imageio.ImageIO;
 
/*
 * @author mkyong
 *
 */
public class ImageTest {
 
   public static void main(String [] args){
 
   try{
 
	BufferedImage originalImage = 
               ImageIO.read(new File("c:\\image\\mypic.jpg"));	
 
        //convert BufferedImage to byte array
	ByteArrayOutputStream baos = new ByteArrayOutputStream();
	ImageIO.write( originalImage, "jpg", baos );
	baos.flush();
	byte[] imageInByte = baos.toByteArray();
	baos.close();
 
	//convert byte array back to BufferedImage
	InputStream in = new ByteArrayInputStream(imageInByte);
	BufferedImage bImageFromConvert = ImageIO.read(in);
 
	ImageIO.write(bImageFromConvert, "jpg", 
             new File("c:\\image\\mypic_new.jpg")); 
 
   }catch(IOException e){
	System.out.println(e.getMessage());
   }		
  }	
}
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