You can read in any file and encode it to jpeg and send it as a response.
Look up the Java Advanced Imaging API to find the JPEG Encoder/Decoder. You
will also have to set your content type to "image/jpeg". Here is a sample
function I use to send my generated map image to the client.
private void sendImage(HttpServletResponse response, BufferedImage bi) {
try {
ServletOutputStream out = response.getOutputStream();
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(bi);
} catch (IOException ioe) {
servlet.log("DrawMapAction: IO Exception encoding JPEG to
ServletOutputStream.", ioe);
}
}
Then in my html, I make an image tag which points to my struts action such
as
<html:img page="/secure/map/draw.do?ForceRefresh=<%= (new
java.util.Date()).getTime() %>" border="0"/>
The force refresh is to make sure the client browser doesn't cache the
image.
http://java.sun.com/products/java-media/jai/
Hope this helps,
Graham
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Friday, July 05, 2002 10:05 AM
To: [EMAIL PROTECTED]
Subject: Displaying a dynamically created Image.
How do I display a dynamically created Image with struts
without saving it to my local harddisc and link the image on it?
thanks matthias
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Hanel Matthias
Fachinformatiker (Anwendungsentwicklung) in Ausbildung
Logistik World GmbH Fon: +49-841-9014-300
Marie-Curie-Strasse 6 Fax: +49-841-9014-302
D- 85055 Ingolstadt mailto:[EMAIL PROTECTED]
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