getting screen resolution using JSP

Greenhorn

Posts: 6

posted 19 years ago

Hi all, I want to get the screen resolution using JSP, does anyone have any idea how to do this?
I've checked the header info from the browswer and its not stored
there. How do people normally do it?

tee mahmood

Greenhorn

Posts: 6

posted 19 years ago

is there a kind person here to give me some help?

Cynthia Yao

Ranch Hand

Posts: 92

posted 19 years ago

Screen resolution? Just wonder why do you need to find out that. Anyway, that is client side, do you search through javascript? If you are using applet, try this:
Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize() ;

karl koch

Ranch Hand

Posts: 388

posted 19 years ago

are you in a kind of hurry ?
you cannot get the screen size just by jsp since this is client side (as already mentioned in the post above).
but try this:
on first page (eg. index.html) , read the screensize with JavaScript, forward to the second page with the screensize as parameters in the url. the second page reads the parameters (the second page would be a servlet or a jsp) and stores it somewhere (session, db...).

karl

tee mahmood

Greenhorn

Posts: 6

posted 19 years ago

thanks for reply but reason I needed to know was because I do
both server side & client side work. I'll try the above javascript solution.
cheers

Julio Lopez

Greenhorn

Posts: 28

posted 19 years ago

Here is a javascript function that shows how you get that information and forward to the appropriate place.
function screenRes() {
var theScreenWidth = screen.width
var theScreenHeight = screen.height
if ( (theScreenWidth > 800) && (theScreenHeight > 600) ) {
window.document.location = "/servlet/Foo"
}
else {
window.document.location = "/login/loginError.jsp"
}
}
or if you want a servlet to do the processing and forwarding
function screenRes() {
var theScreenWidth = screen.width
var theScreenHeight = screen.height
window.document.location = "/servlet/Whatever?screenWidth=" + theScreenWidth + "&screenHeight=" + theScreenHeight
}
The HTML document the javascript will reside in should be pretty minimal and should look something like,
<HTML>
<HEAD>
<SCRIPT LANGUAGE="JavaScript">
... above code
</SCRIPT>
</HEAD>
<BODY onLoad="screeRes();">
</BODY>
</HTML>
Obviously the screen properties can only be extracted from a javascript enabled browser and I have no idea how cross-browser the capability is.
Julio Lopez
M-Group Systems

tee mahmood

Greenhorn

Posts: 6

posted 19 years ago

thankx Julio

works a treat in javascript enabled browsers.

Consider Paul's rocket mass heater.