struts-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Laurie Harper <lau...@holoweb.net>
Subject Re: Problem in using logic:iterate in struts
Date Tue, 23 Sep 2008 19:20:12 GMT
Unfortunately your struts-config.xml and JSP code didn't make it through 
to the list properly. Make sure you're sending your message as plain text.

A couple of questions:

*) How are you accessing the page? (i.e. what URL are you typing?)

*) Are you sure you are calling the action before the JSP is rendered? 
What happens if you put a println at the top of execute()

L.

UITOT wrote:
> Hello all,
> I have developed 1 application using struts.I am getting this error in my
> JSP.I have used logic:iterate.I have populated an arraylist in action class
> which I am using in my JSP.I am able to see the data from the arraylist in
> my JSP but I am getting error when I am clicking on the hyperlink in
> JSP.This is the error.Please help me as I am pretty new to struts.Any help
> will be highly appreciated.Thanx in advance.
> 
> ApplicationDispatcher[/TGMC_DB1-2009] PWC1231: Servlet.service() for servlet
> jsp threw exception
> javax.servlet.jsp.JspException: Cannot find bean: "topic_list" in any scope
> at org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:935)
> at org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:232)
> at org.apache.jsp.viewThreads_jsp._jspService(viewThreads_jsp.java from
> :121)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:93)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
> at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
> at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:470)
> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:364)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
> at
> org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:317)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
> at
> org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
> at
> org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:853)
> at
> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:703)
> at
> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:542)
> at
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:474)
> at
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:366)
> at
> org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
> at
> org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:263)
> at
> org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
> at
> org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:318)
> at
> org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
> at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
> at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:718)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
> at
> org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:317)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
> at
> org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:288)
> at
> org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:271)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
> at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
> at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
> at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
> at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:270)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:637)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:568)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:813)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:339)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:261)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:212)
> at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
> at
> com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)
> StandardWrapperValve[action]: PWC1406: Servlet.service() for servlet action
> threw exception
> javax.servlet.jsp.JspException: Cannot find bean: "topic_list" in any scope
> at org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:935)
> at org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:232)
> at org.apache.jsp.viewThreads_jsp._jspService(viewThreads_jsp.java from
> :121)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:93)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
> at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
> at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:470)
> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:364)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
> at
> org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:317)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
> at
> org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
> at
> org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:853)
> at
> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:703)
> at
> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:542)
> at
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:474)
> at
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:366)
> at
> org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
> at
> org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:263)
> at
> org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:398)
> at
> org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:318)
> at
> org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
> at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
> at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:718)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)
> at
> org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:411)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:317)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
> at
> org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:288)
> at
> org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:271)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
> at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
> at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
> at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
> at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:270)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:637)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:568)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:813)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:339)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:261)
> at
> com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:212)
> at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
> 
> *//Action class*
> package com.myapp.struts;
>  
> import java.io.IOException;
> import javax.servlet.ServletException;
> import javax.servlet.http.HttpServletRequest;
> import javax.servlet.http.HttpServletResponse;
>  
> import org.apache.struts.action.Action;
> import org.apache.struts.action.ActionForm;
> import org.apache.struts.action.ActionForward;
> import org.apache.struts.action.ActionMapping;
> import java.util.ArrayList;
>  
> public class DiscussionForumViewAction extends Action {
>  
>    
>   public ActionForward execute(ActionMapping mapping,
>     ActionForm form,
>     HttpServletRequest request,
>     HttpServletResponse response)
>     throws IOException, ServletException
>  {
>    
>       String target = new String("success");
>    
>         try
>         {
>          ArrayList TopicList = null;
>          TopicList= Discussion_Forum.getTopics();
>          request.setAttribute("topic_list",TopicList);
>         }
>         catch(Exception ex)
>         {
>             System.out.println(ex.getMessage());
>         }
>       return (mapping.findForward(target));
>  }
>        
> }
>  
> *// jsp*
>  
> <%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
> <%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
> <%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
>  
> <%@page contentType="text/html" pageEncoding="UTF-8"%>
> 
>  
> 
>     
>     
>    
>     
>         
>         
> 
>  
> Discussion Forum
> 
>  
> 
>  
>         
> 
>               
>            
>             
> 
>                             
>                              
> 
>                                 	Forum
>                                 	Topic/Messages
>                                	Last Post
>                              
>                             
>                             
>                                
>                                 
>                                   
>                                     
> 
>                                       	
> // this is the statement which is generating error                                  
      
> get_threads.do?topic_id=<bean:write name= ">      
>                                     
>     
>                                     	
>                                     
>                                    
>                               
>                                    	
>                                    
>                                   
>    
>                                 
>                             
>                         
>                  
>            
> 
>         
> 
>     
>  
> 
>  
> *//struts config*
>     
>                
>                
>        
>    
>  
> *//formbean*
> package com.myapp.struts;
>  
> import javax.servlet.http.HttpServletRequest;
>  
> import org.apache.struts.action.ActionForm;
> import org.apache.struts.action.ActionMapping;
>  
> public class TopicFormBean extends ActionForm {
>  
>   protected String topic_name;
>   protected String description;
>   protected Integer no_of_threads;
>   protected String last_post;
>   protected Integer topic_id;
>  
>  
>  
>     public String getTopic_name() {
>         return topic_name;
>     }
>  
>     public void setTopic_name(String topic_name) {
>         this.topic_name = topic_name;
>     }
>  
>     public String getDescription() {
>         return description;
>     }
>  
>     public void setDescription(String desc) {
>         this.description = desc;
>     }
>  
>      public Integer getNo_of_threads() {
>         return no_of_threads;
>     }
>  
>     public void setNo_of_threads(Integer no_of_threads) {
>         this.no_of_threads = no_of_threads;
>     }
>  
>     public String getLast_post() {
>         return last_post;
>     }
>  
>     public void setLast_post(String last_post) {
>         this.last_post = last_post;
>     }
>  
>      public Integer getTopic_id() {
>         return topic_id;
>     }
>  
>     public void setTopic_id(Integer topic_id) {
>         this.topic_id = topic_id;
>     }
>  
>       }
> 


---------------------------------------------------------------------
To unsubscribe, e-mail: user-unsubscribe@struts.apache.org
For additional commands, e-mail: user-help@struts.apache.org


Mime
View raw message