How to enable downloads

I'm a bit confused about how I could enable (start) a file download from a JSP page.
For example, if a user clicked an image that they wanted to download, what's the technique to start the download happening?
I'm thinking this is easy, but I can't find any references to it (or I'm looking up the wrong keywords).
Thanks for anyone's reply or suggestions.
-- Mike

your jsp file result is an html page.
so, if it's an html page and you have a link to your file in it, the user clicks and the whole thing works ..

Huh?
I have no idea what you're saying.
What I'm asking is what would you have to implement on the server side so that if the user clicks on it you download a file.
Is this an FTP link of some kind?
Can you be a little more specific?
Thanks.
-- Mike

When your server reply to the browser, you declare the content-type of the response.
The default is text/html.
But if you declare the content type as any MIME type the browser can not manage, it will just prompt the download dialog window instead of display the response.
HTH

hello,
store this image in a zip file and link the image to this zip file.
now when the user will click on the image to download the browser functionality will ask him to download or not.
hope this willl help u.