First I have been struggling with this for a while now. I'm also new to JSP
having used XMLC for presentation in the past.
I have the following page:
1: <%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
2: <%@ taglib uri="/WEB-INF/c.tld" prefix="c" %>
3:
4: <c:set var="var1" value="var1" scope="page" />
5: <c:out value="${var1}" />
6: <bean:define id="var2" value="var2" toScope="page" />
7: <%= var2 %>
8:
9: <%@ include file="/mark/dumpscopes.jsp" %>
This runs fine, but if I change the <c:out> on line 5 to <%= var1 %> I get
the following compilation error:
Generated servlet error:
[javac] Compiling 1 source file
[javac]
/Users/mark/opt/JBoss-3.2.3/server/default/work/MainEngine/localhost/mori/ma
rk/mypage_jsp.java:65: cannot resolve symbol
[javac] symbol : variable var1
[javac] location: class org.apache.jsp.mypage_jsp
[javac] out.print( var1 );
[javac] ^
[javac] 1 error
I have looked at the source for <c:set> and <bean:define> and if I'm looking
at it right they both set the variable in the same manner:
>From org.apache.struts.taglib.bean.DefineTag line 288
(jakarta-struts-1.1-src/src/share/org/apache/struts/taglib/bean/DefineTag.ja
va):
pageContext.setAttribute(id, value, inScope);
>From org.apache.taglibs.standard.tag.common.core.SetSupport line 144
(jakarta-taglibs-standard-1.0.5-src/standard/src/org/apache/taglibs/standard
/tag/common/core/SetSupport.java):
pageContext.setAttribute(var, result, scope);
I'm curious as to why <%= %> works with a variable defined using
<bean:define> but not with one defined using <c:set>.
Additionally I have dumped the scope to see if var1 exists in the page
context when using the <c:out> version and it is there.
Environment:
Jboss-3.2.3 w/ included Tomcat 4.1.29
OS X Panther 10.3.2 w/ JDK 1.4.2_03
Ant 1.6
Thanks much,
Mark
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