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EL doubt?

Joe Harry
Ranch Hand

Joined: Sep 26, 2006
Posts: 9345
    
    2

Guys, in the following code how do we get the o/p EL in either syntax? What happens in the background when we hit the EL and how the o/p is evaluated?

<html>
<head><title>As a normal JSP</title></head>
<body>
<% request.setAttribute("whichever", "EL in either syntax"); %>
<p>${whichever}</p>
</body></html>


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Christophe Verré
Sheriff

Joined: Nov 24, 2005
Posts: 14687
    
  16

This expression will look for the attribute named whichever, searching the page, request, session, and application scopes, and will return its value. If the attribute is not found, null is returned.


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Joe Harry
Ranch Hand

Joined: Sep 26, 2006
Posts: 9345
    
    2

So it will do a pageContext.findAttribute(). Now what if I'm not trying to display any attribute but rather just a text?
Christophe Verré
Sheriff

Joined: Nov 24, 2005
Posts: 14687
    
  16

I'm not a container provider, but I'd say that it looks for a String and just prints it.

String -With single and double quotes - " is escaped as \", ' is escaped as \', and \ is escaped as \\. Quotes only need to be escaped in a string value enclosed in the same type of quote
 
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