If i were you, i would check like this in my jsp:
<%@ page import="java.util.Collection" %>
<%@ page import="java.util.Iterator" %>
....
<%
Collection c = ...getProductLines();
Iterator it = c.iterator();
out.print(it);
%>
do not <logic:iterate> yet util the above code run
ok.And then you can be sure that the previous
<logic:iterate> should run with no problem.
the <logic:iterate> tag handler will always try to
retrieve the object from one of the 4 scopes ie.
page,request,session,application that you placed
sometime before.
--- Matt E <[EMAIL PROTECTED]> 的正文：> Hello!
>
> I tried that (I found I needed to change Collection
> c
> to java.util.Collection c, so the compiler would not
> complain) but I'm still experiancing the same
> problem:
>
> org.apache.jasper.JasperException: Cannot create
> iterator for this collection
>
> I added some print statements to help me debug, and
> I
> know that the getProductLines() method is being
> called, so this *should* be working. I'm at a loss.
>
> Here's the full stack trace if it will help anyone.
>
> Thanks in advance for any insight anyone has.
>
> Cheers!
>
> org.apache.jasper.JasperException: Cannot create
> iterator for this collection
> at
>
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:254)
> at
>
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
> at
>
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
> at
>
javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
> at
>
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
>
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
>
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
>
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
>
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
> at
>
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
>
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
> at
>
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
>
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
>
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
>
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
>
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
> at
>
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
> at
>
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
> at
>
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
> at
>
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
> at java.lang.Thread.run(Thread.java:536)
>
>
> root cause
>
> javax.servlet.ServletException: Cannot create
> iterator
> for this collection
> at
>
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:533)
> at
>
org.apache.jsp.toolDevelopmentRequest_jsp._jspService(toolDevelopmentRequest_jsp.java:147)
> at
>
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137)
> at
>
javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
>
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:210)
> at
>
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295)
> at
>
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
> at
>
javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> at
>
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
> at
>
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
> at
>
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
>
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
>
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
>
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
>
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
> at
>
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
>
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
> at
>
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
>
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
>
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
> at
>
org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
> at
>
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
> at
>
org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
> at
>
org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
> at
>
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:594)
> at
>
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)
> at
>
org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)
> at
>
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)
> at java.lang.Thread.run(Thread.java:536)
>
>
>
>
> --- guo yingshou <[EMAIL PROTECTED]> wrote:
> > try something like:
> >
> > <%
> > Collection c =
> >
>
org.ellism.tir.util.DatabaseConstantsAdapter.getInstance().getProductLines();
> >
> > request.setAttribute("colName",c);
> > %>
> >
> > and then:
> >
> > <logic:iterate id="..." collection="colName"...
> >
> > </logic:iterate>
> >
> > you can alse put your collection into the jsp
> scope
> > variable somewhere in your action.
> >
> > hope it helps.
> >
> > guo
> >
> > --- Matt E <[EMAIL PROTECTED]> 的正文：> Hello
> > All!
> > >
>
=== message truncated ===
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