Hello experts,
How can I set a value using JSP 2?
I mean, if ${val} is the new version of <c:out value="${val}" />, what is the JSP 2 version of <c:set var="val" value="bla" />?
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48answers:
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A:
I think you're confused. ${val} is not the new version of <c:out value="${val}" />. Both are Expression Language (EL) statements.*
In JSP 2, you still use <c:set var="val" value="bla" />.
http://en.wikipedia.org/wiki/JavaServer_Pages#JSP_2.0
*okay, okay, so while ${val} is an EL statement, <c:out value="${val}" /> is a JSTL tag that uses an EL expression.
The JSP 2 section of the Wikipedia article has parts copied verbatim from here.
Matt Ball
2010-09-20 19:07:48
What does JSP 2 bring to the table then? Only a shortcut for the <c:out value="${val}" />? I know I can now write ${val} and it is evaluated on place instead of by the c:out tag. Is that the only change?
user0912
2010-09-20 19:12:20
It's not necessarily a shortcut. JSP2 just started to support EL in template text. Prior to JSP2, EL was only evaluated in tag attribtues. The `<c:out>` does by the way one more thing: escaping XML entities. So, EL in template text does essentially the same as `<c:out value="${foo}" escapeXml="false" />`. Also note that JSTL should not be confused with EL.
BalusC
2010-09-20 19:16:36
Is the `<c:out>` XML escaping equivalent to `${fn:escapeXML(foo)}` JSTL function?
Fly
2010-09-20 21:29:50
@Fly yes it is (hi!)
Pointy
2010-09-20 23:35:19