Fetching an image from the specified URL and resizing it.

[Debasmita Dash]

Hi All,

I have to fetch an image from the given URL and resize it before displaying the same on the html page.
I am able to do this using java.awt.image.BufferedImage and javax.imageio.ImageIO APIs. But I need to do the same without using java.awt. I tried the following code but it's not working. The output file doesn't contain the image.

ByteArrayOutputStream baos = null;
URL imageURL = new URL(imgURL);
InputStream is = imageURL.openStream();
byte[] tempBuffer = new byte[1024];
baos = new ByteArrayOutputStream();
while (is.read(tempBuffer) != -1) {
	baos.write(tempBuffer);
	}
baos.writeTo(new FileOutputStream(new File("D://output.gif")));

Thanks for your help.

[Carey Brown]

Did you mean "D:\\output.gif" ?

Also, read() is not guaranteed to read a full buffer's worth.

[Paul Clapham]

And what is the purpose of writing to a ByteArrayOutputStream and then copying from that to a FileOutputStream? Why not just write directly to the FileOutputStream? (With the corrected code as per Carey Brown's comment, of course.)

[Debasmita Dash]

Thanks Carey and Paul for replying.

I will be using the ByteArrayOutputStream further to display the image in html page and have used the FileOutputStream here to check the image content.

Thanks,
Debasmita