pageContext is an object that changes for each .jsp page.  Each .jsp
page allocates a pageContext as one of the first things it does.

So if you put an attribute in there, it will last until the page ends,
either because the response has gone back to the browser or you have
done a <jso:forward .../>

It also has some getters for getting the request, response, etc
objects.

It also has some useful methods for convenience.

Check out the Javadoc.

-- Sam

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