Compress or resize image in jpg format?

Hi guys,
I am developing a video rental web application using JSF, Spring, Hibernate and Tomcat 5. The administrator is able upload image. One of the page is to display a list of available DVD for rental just like ebay product listing page. The problem is that the administrator always upload the image with file size around 100K to 200K bytes and cause slow loading on the listing page, which will display 20 records (20 images). So if 100K bytes per image mean 2MB of images to download.
I am wondering how to compress and resize the image to a smaller resolution once the administrator uploaded the image. I saw eBay that each image is just 2Kbytes an image on the listing page.
Please forgive me if i ask in the wrong forum as i really don't know where to ask. Thank you !!
regards,
kmthien

You can do that in Java (you may need to use the -Djava.awt.headless=true option when running the server on headless Unix systems)....
You can use javax.imageio.ImageIO to read an image file to a java.awt.image.BufferedImage object, and write one back out to a JPEG file. And you can create a new BufferedImage simply and draw the original image at a new size on it, then save it. There's plenty of examples around the forums of doing all of that.

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If the reason is about memory, warning message should be happened when upload the image, because "show thumbnail" means resize at second time, how come you failed to resize the picture that system let it upload succeed at the first time by the same resize process?
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Compress or resize image in jpg format?

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