2014-06-05 13:50 GMT+04:00 Jeff Cai <jeff_...@symantec.com>:
> Hi,
>
> In tomcat 7.0.54, the variable is not supported.
> I changed the source
> apache-tomcat-7.0.54/webapps/examples/jsp/tagplugin/foreach.jsp
>
> <c:set var="num" value="20" />
> <c:forEach var="item" begin="1" end="{$num}">
> ${item}
> </c:forEach>
>
> Then it reports:
>
> org.apache.jasper.JasperException: Unable to compile class for JSP
>
> org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:672)
>
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
>
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
> root cause
>
> java.lang.NumberFormatException: For input string: "{$num}"
>
> java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
> java.lang.Integer.parseInt(Integer.java:492)
> java.lang.Integer.valueOf(Integer.java:582)
> org.apache.jasper.compiler.JspUtil.coerceToInt(JspUtil.java:605)
>
> org.apache.jasper.compiler.Generator$GenerateVisitor.convertString(Generator.java:3184)
>
> org.apache.jasper.compiler.Generator$GenerateVisitor.evaluateAttribute(Generator.java:3001)
>
> org.apache.jasper.compiler.Generator$GenerateVisitor.generateSetters(Generator.java:3106)
>
> org.apache.jasper.compiler.Generator$GenerateVisitor.generateCustomStart(Generator.java:2276)
>
> org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1768)
> org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1538)
> org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2377)
> org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2429)
> org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2435)
> org.apache.jasper.compiler.Node$Root.accept(Node.java:474)
> org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2377)
> org.apache.jasper.compiler.Generator.generate(Generator.java:3517)
> org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:250)
> org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
> org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
> org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
>
> org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:657)
>
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
>
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
> javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
>
>
> I did same tests on Tomcat 7.0.37 and this error did not happen.
>
What are the first lines of your WEB-INF/web.xml file?
My guess is that you are adhering to an old version of specification
there, that does not support EL.
I can also suggest you to configure your Tomcat in "strict servlet
compliance" mode and see whether it complaints.
http://tomcat.apache.org/tomcat-7.0-doc/config/systemprops.html#Specification
Best regards,
Konstantin Kolinko
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