JSTL forEach

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U.O - 26 Mar 2007 22:01 GMT

I can't understand how <forEach> is supposed to work. This code iterates
once (why?) and produces only one string, "Item" (without the index number).
Why?

<jsp:root version="1.2"
xmlns:jsp="http://java.sun.com/JSP/Page"
xmlns:c="http://java.sun.com/jsp/jstl/core"
>
<jsp:output doctype-root-element="html" omit-xml-declaration="false"
doctype-public="-//W3C//DTD XHTML 1.0 Transitional//EN"

doctype-system="http://www.w3c.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"/>
<jsp:directive.page contentType="text/html; charset=UTF-8" session="true"
/>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1" />
<title>Blah</title>
</head>
<body>
<div>
<c:forEach var="i" start="1" end="10">
Item ${i}<br />
</c:forEach>
</div>
</body>
</html>
</jsp:root>

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david.karr - 27 Mar 2007 00:05 GMT

> I can't understand how <forEach> is supposed to work. This code iterates
> once (why?) and produces only one string, "Item" (without the index number).
[quoted text clipped - 25 lines]
> </html>
> </jsp:root>

I can't say for sure, as I've never tried to use pure XML JSP pages,
but it sure seems like it's not executing the JSTL at all. Is the
fact that you have version "1.2" on your JSP a problem?

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U.O - 27 Mar 2007 07:21 GMT

> > I can't understand how <forEach> is supposed to work. This code iterates
> > once (why?) and produces only one string, "Item" (without the index number).
[quoted text clipped - 6 lines]
> > <jsp:output doctype-root-element="html" omit-xml-declaration="false"
> > doctype-public="-//W3C//DTD XHTML 1.0 Transitional//EN"

doctype-system="http://www.w3c.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"/>

> > <jsp:directive.page contentType="text/html; charset=UTF-8" session="true"
> > />
[quoted text clipped - 17 lines]
> but it sure seems like it's not executing the JSTL at all. Is the
> fact that you have version "1.2" on your JSP a problem?

Right, the <c:forEach> tag is still in the generated output. The funny thing
is, when I add my own taglib, my tags are processed correctly.

Generated xhtml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3c.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type"/>
<title>Blah</title>
</head>
<body>
<div>
<c:forEach end="10" start="1" var="i">
Item <br/>
</c:forEach>
</div>
</body>
</html>

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steen - 27 Mar 2007 12:16 GMT

> <c:forEach end="10" start="1" var="i">
> Item <br/>
> </c:forEach>

Looks to me like you're forgetting to add a reference to the taglib:
<%@ taglib uri='http://java.sun.com/jstl/core' prefix='c' %>

because when you forget this, the <c:forEach> tag will be sent to the
client (like your output states)

/Steen

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festo - 27 Mar 2007 19:18 GMT

> > <c:forEach end="10" start="1" var="i">
> > Item <br/>
[quoted text clipped - 7 lines]
>
> /Steen

Did you try to use <c:out value="Item ${i}" /> ?

papaJo

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U.O - 27 Mar 2007 19:33 GMT

> > > <c:forEach end="10" start="1" var="i">
> > > Item <br/>
[quoted text clipped - 9 lines]
>
> Did you try to use <c:out value="Item ${i}" /> ?

Yes. Same result.

> papaJo

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U.O - 27 Mar 2007 19:30 GMT

> > <c:forEach end="10" start="1" var="i">
> > Item <br/>
> > </c:forEach>
>
> Looks to me like you're forgetting to add a reference to the taglib:
> <%@ taglib uri='http://java.sun.com/jstl/core' prefix='c' %>

Doesn't
xmlns:c="http://java.sun.com/jsp/jstl/core"
do that?

> because when you forget this, the <c:forEach> tag will be sent to the
> client (like your output states)
>
> /Steen

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Daniel Pitts - 27 Mar 2007 00:24 GMT

Have you considered using a modern version of JSPs? Say, JSP 2?

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