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Posted to user@struts.apache.org by Michael Cheung <vi...@justware.co.jp> on 2006/08/13 14:34:37 UTC
some question, please help me.
Hi, everyone;
I am new to struts. Need someone help me.
Version:Struts 1.2.9, jsp 2.4, tomcat,5.0.28
Question about: struts-el, c.tld
in c.tld, not c-rt.tld
1.Document said, difference between el and standard is rtexpression.
${xxx} is supportted in EL tags, but in standard tags, ${xxx} give me the
correct answer, and <%=xx%> give me error. Why?
2.Document said logic:equal is not implete as c:if can do the same thing,
but <logic:equal name="a" value="1">
can be rewritten in <c:if>, as test attribute can't be rtexpression.
3.c:forEach not support array?
in Action
request.setAttribute("a",a); //String[] a; with two item
in jsp
<c:forEach items="a" varStatus="i">
${a[i.index]}
</c:forEach>
only loop once, and give me the first value
the following code ,give me two line, but I can't get the end tag dynamically.
<c:forEach begin="0" end="1" varStatus="i">
${a[i.index]}
</c:forEach>
4.c:if test is not do the job. the following code
<c:forEach items="a" varStatus="i">
${i.first?"Y":"N"}
<c:if test="i.first">"Y"</c:if>
</c:forEach>
${i.first?"Y":"N"} give me the correct result, but
<c:if test="i.first">"Y"</c:if> not.
where is the mistake?
5.It seems, via pageContext findAttribute and setAttribute, we can pass value
from/to EL, I am not tested, is this the right way to resolve problem? I mean
as rtexpression can't be used in these tags, we first do some calcute, then set
the result to el, and use it in tags.
6.c-rt is not work for me!
change c.tld to c-rt.tld, access the page, tomcat didn't give me the answer,
just wait, and without error.
Thanks a lot.
Regards;
Michael
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Re[2]: some question, please help me.
Posted by Michael Cheung <vi...@justware.co.jp>.
Hi,
Thanks for your help.
I am using the c.tld from struts-el.
and it give me the following error message:
[According to TLD or attribute directive in tag file, attribute items does not accept any expressions]
when I change to c-rt.tld, same as c.tld from struts-el, it works as you said.
Then what is the c.tld for? Should I always use c-rt.tld?
Is there any detail document for c.tld and c-rt.tld?
Thanks a lot.
Regards;
Michael
On Sun, 13 Aug 2006 10:57:20 -0400
"Martin Gainty" <mg...@hotmail.com> wrote:
> Good Morning Michael--
>
> If I understand your question correctly the expression needs to be enclosed in ${} as in this example from Ted Husted
> - <c:choose>
> - <c:when test="${not empty jcookie}">
> - <%-- The functionality of "logic:match" will eventually be available
> - through a string function in the EL expression. --%>
> - <logic-el:match expr="${jcookie}" value="0">
> - match
> - </logic-el:match>
> - <logic-el:notMatch expr="${jcookie}" value="0">
> - notMatch
> - </logic-el:notMatch>
> - </c:when>
> - <c:otherwise>
> - missing
> - </c:otherwise>
> - </c:choose>
> (link available @)
> http://mail-archives.apache.org/mod_mbox/struts-dev/200602.mbox/%3C20060210182748.63861.qmail@minotaur.apache.org%3E
>
> Anyone else?
> Martin --
>
>
>
> > Hi, everyone;
> >
> > I am new to struts. Need someone help me.
> >
> > Version:Struts 1.2.9, jsp 2.4, tomcat,5.0.28
> > Question about: struts-el, c.tld
> >
> > in c.tld, not c-rt.tld
> >
> > 1.Document said, difference between el and standard is rtexpression.
> > ${xxx} is supportted in EL tags, but in standard tags, ${xxx} give me the
> > correct answer, and <%=xx%> give me error. Why?
> >
> > 2.Document said logic:equal is not implete as c:if can do the same thing,
> > but <logic:equal name="a" value="1">
> > can be rewritten in <c:if>, as test attribute can't be rtexpression.
> >
> > 3.c:forEach not support array?
> > in Action
> > request.setAttribute("a",a); //String[] a; with two item
> >
> > in jsp
> > <c:forEach items="a" varStatus="i">
> > ${a[i.index]}
> > </c:forEach>
> > only loop once, and give me the first value
> >
> > the following code ,give me two line, but I can't get the end tag dynamically.
> > <c:forEach begin="0" end="1" varStatus="i">
> > ${a[i.index]}
> > </c:forEach>
> >
> > 4.c:if test is not do the job. the following code
> > <c:forEach items="a" varStatus="i">
> > ${i.first?"Y":"N"}
> > <c:if test="i.first">"Y"</c:if>
> > </c:forEach>
> > ${i.first?"Y":"N"} give me the correct result, but
> > <c:if test="i.first">"Y"</c:if> not.
> > where is the mistake?
> >
> > 5.It seems, via pageContext findAttribute and setAttribute, we can pass value
> > from/to EL, I am not tested, is this the right way to resolve problem? I mean
> > as rtexpression can't be used in these tags, we first do some calcute, then set
> > the result to el, and use it in tags.
> >
> > 6.c-rt is not work for me!
> > change c.tld to c-rt.tld, access the page, tomcat didn't give me the answer,
> > just wait, and without error.
> >
> > Thanks a lot.
> >
> > Regards;
> > Michael
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> > For additional commands, e-mail: user-help@struts.apache.org
> >
> >
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Re: some question, please help me.
Posted by Martin Gainty <mg...@hotmail.com>.
Good Morning Michael--
If I understand your question correctly the expression needs to be enclosed in ${} as in this example from Ted Husted
- <c:choose>
- <c:when test="${not empty jcookie}">
- <%-- The functionality of "logic:match" will eventually be available
- through a string function in the EL expression. --%>
- <logic-el:match expr="${jcookie}" value="0">
- match
- </logic-el:match>
- <logic-el:notMatch expr="${jcookie}" value="0">
- notMatch
- </logic-el:notMatch>
- </c:when>
- <c:otherwise>
- missing
- </c:otherwise>
- </c:choose>
(link available @)
http://mail-archives.apache.org/mod_mbox/struts-dev/200602.mbox/%3C20060210182748.63861.qmail@minotaur.apache.org%3E
Anyone else?
Martin --
> Hi, everyone;
>
> I am new to struts. Need someone help me.
>
> Version:Struts 1.2.9, jsp 2.4, tomcat,5.0.28
> Question about: struts-el, c.tld
>
> in c.tld, not c-rt.tld
>
> 1.Document said, difference between el and standard is rtexpression.
> ${xxx} is supportted in EL tags, but in standard tags, ${xxx} give me the
> correct answer, and <%=xx%> give me error. Why?
>
> 2.Document said logic:equal is not implete as c:if can do the same thing,
> but <logic:equal name="a" value="1">
> can be rewritten in <c:if>, as test attribute can't be rtexpression.
>
> 3.c:forEach not support array?
> in Action
> request.setAttribute("a",a); //String[] a; with two item
>
> in jsp
> <c:forEach items="a" varStatus="i">
> ${a[i.index]}
> </c:forEach>
> only loop once, and give me the first value
>
> the following code ,give me two line, but I can't get the end tag dynamically.
> <c:forEach begin="0" end="1" varStatus="i">
> ${a[i.index]}
> </c:forEach>
>
> 4.c:if test is not do the job. the following code
> <c:forEach items="a" varStatus="i">
> ${i.first?"Y":"N"}
> <c:if test="i.first">"Y"</c:if>
> </c:forEach>
> ${i.first?"Y":"N"} give me the correct result, but
> <c:if test="i.first">"Y"</c:if> not.
> where is the mistake?
>
> 5.It seems, via pageContext findAttribute and setAttribute, we can pass value
> from/to EL, I am not tested, is this the right way to resolve problem? I mean
> as rtexpression can't be used in these tags, we first do some calcute, then set
> the result to el, and use it in tags.
>
> 6.c-rt is not work for me!
> change c.tld to c-rt.tld, access the page, tomcat didn't give me the answer,
> just wait, and without error.
>
> Thanks a lot.
>
> Regards;
> Michael
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
> For additional commands, e-mail: user-help@struts.apache.org
>
>