Did you have the tld declaration at the top of your jsp page e.g
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
?
Martin
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> Date: Wed, 14 Jan 2009 10:26:04 -0800
> From: anishpis...@gmail.com
> To: user@struts.apache.org
> Subject: Logic Iterate problem
>
>
> Hi,
>
> In one page of my application i am trying to iterate through one collection
> for populating one combo box. But it is showing
> "javax.servlet.jsp.JspException: Cannot create iterator for this collection"
> ....
>
> I have one LoginForm that extends Validator form and it containg one object
> of User. This user object contains a List of user roles .Actually i am
> trying to display these user roles in my combo box in the jsp page. My code
> is below.
>
> I am using struts 1.3 for develping this project ...
>
> Please help me
>
>
>
> My form class is below...
>
>
> public class Loginform extends ValidatorForm{
>
> public String userName;
> public String passWord;
> public User user = new User();
>
>
> public String getUserName() {
> return userName;
> }
>
> public void setUserName(String userName) {
> this.userName = userName;
> }
>
> public String getPassWord() {
> return passWord;
> }
>
> public void setPassWord(String passWord) {
> this.passWord = passWord;
> }
>
> public User getUser() {
> return user;
> }
>
> public void setUser(User user) {
> this.user = user;
> }
>
> /**
> * Reset all properties to their default values.
> *
> * @param mapping The mapping used to select this instance
> * @param request The servlet request we are processing
> */
> public void reset(ActionMapping mapping, HttpServletRequest request) {
> super.reset(mapping, request);
> userName = "";
> passWord= "";
> }
> }
>
>
>
>
> User object is
>
> public class User implements Serializable{
>
> public String userid = "Ashli";
> public String userName = "Ashli Isaac";
> public String passWord = "123456";
> public String userNumber = "1001";
> public List<String> userRoles = new ArrayList<String>();
> public String loginStatus;
> public String riskCounter;
>
>
> public User(){
> userRoles.add("Admin User");
> userRoles.add("Trial User");
> userRoles.add("BackUP User");
> userRoles.add("Super User");
>
> }
>
> public List<String> getUserRoles() {
> return userRoles;
> }
> public void setUserRoles(List<String> userRoles) {
> this.userRoles = userRoles;
> }
>
>
>
>
> the code snippet for iteration in jsp is
>
> <tr>
>
> <td width="30%">
> <logic:iterate id="results" name="loginForm"
> property="user">
> <bean:define id="result" name="results"
> property="userRoles">
> <bean:write name="result"/>
> </bean:define>
> </logic:iterate>
> </td>
>
>
> My exception stack trace is
>
> SEVERE: Servlet.service() for servlet jsp threw exception
> javax.servlet.jsp.JspException: Cannot create iterator for this collection
> at
> org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:275)
> at org.apache.jsp.jsp.welcome_jsp._jspService(welcome_jsp.java:193)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
> at
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
> at
> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
> at
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
> at
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
> at
> org.apache.struts.chain.commands.servlet.PerformForward.handleAsForward(PerformForward.java:113)
> at
> org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:96)
> at
> org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:54)
> at
> org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
> at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
> at
> org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
> at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
> at
> org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
> at
> org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
> at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
> at java.lang.Thread.run(Unknown Source)
> Jan 14, 2009 9:07:41 PM
> org.apache.struts.chain.commands.AbstractExceptionHandler execute
> WARNING: Unhandled exception
> org.apache.jasper.JasperException: An exception occurred processing JSP page
> /jsp/welcome.jsp at line 99
>
> 96: Login
> Status
> 97: </td>
> 98: <td width="30%">
> 99: <logic:iterate
> id="results" name="loginForm" property="user">
> 100:
> <bean:define id="result" name="results" property="userRoles">
> 101:
> <bean:write name="result"/>
> 102:
> </bean:define>
>
>
> Stacktrace:
> at
> org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
> at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
> at
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
> at
> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
> at
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
> at
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
> at
> org.apache.struts.chain.commands.servlet.PerformForward.handleAsForward(PerformForward.java:113)
> at
> org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:96)
> at
> org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:54)
> at
> org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
> at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
> at
> org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
> at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
> at
> org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
> at
> org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
> at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
> at java.lang.Thread.run(Unknown Source)
> Caused by: javax.servlet.ServletException: javax.servlet.jsp.JspException:
> Cannot create iterator for this collection
> at
> org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:852)
> at
> org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
> at org.apache.jsp.jsp.welcome_jsp._jspService(welcome_jsp.java:368)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
> ... 33 more
> Caused by: javax.servlet.jsp.JspException: Cannot create iterator for this
> collection
> at
> org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:275)
> at org.apache.jsp.jsp.welcome_jsp._jspService(welcome_jsp.java:193)
> ... 36 more
> Jan 14, 2009 9:07:41 PM org.apache.struts.chain.commands.ExceptionCatcher
> postprocess
> WARNING: Exception from exceptionCommand 'servlet-exception'
> org.apache.jasper.JasperException: An exception occurred processing JSP page
> /jsp/welcome.jsp at line 99
>
> 96: Login
> Status
> 97: </td>
> 98: <td width="30%">
> 99: <logic:iterate
> id="results" name="loginForm" property="user">
> 100:
> <bean:define id="result" name="results" property="userRoles">
> 101:
> <bean:write name="result"/>
> 102:
> </bean:define>
>
>
> Stacktrace:
> at
> org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
> at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:398)
> at
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
> at
> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
> at
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
> at
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
> at
> org.apache.struts.chain.commands.servlet.PerformForward.handleAsForward(PerformForward.java:113)
> at
> org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:96)
> at
> org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:54)
> at
> org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
> at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
> at
> org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
> at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
> at
> org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
> at
> org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
> at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
> at java.lang.Thread.run(Unknown Source)
> Caused by: javax.servlet.ServletException: javax.servlet.jsp.JspException:
> Cannot create iterator for this collection
> at
> org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:852)
> at
> org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
> at org.apache.jsp.jsp.welcome_jsp._jspService(welcome_jsp.java:368)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
> ... 33 more
> Caused by: javax.servlet.jsp.JspException: Cannot create iterator for this
> collection
> at
> org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:275)
> at org.apache.jsp.jsp.welcome_jsp._jspService(welcome_jsp.java:193)
> ... 36 more
> Jan 14, 2009 9:07:41 PM org.apache.catalina.core.StandardWrapperValve invoke
> SEVERE: Servlet.service() for servlet action threw exception
> javax.servlet.jsp.JspException: Cannot create iterator for this collection
> at
> org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:275)
> at org.apache.jsp.jsp.welcome_jsp._jspService(welcome_jsp.java:193)
> at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
> at
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
> at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
> at
> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
> at
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
> at
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
> at
> org.apache.struts.chain.commands.servlet.PerformForward.handleAsForward(PerformForward.java:113)
> at
> org.apache.struts.chain.commands.servlet.PerformForward.perform(PerformForward.java:96)
> at
> org.apache.struts.chain.commands.AbstractPerformForward.execute(AbstractPerformForward.java:54)
> at
> org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
> at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
> at
> org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
> at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
> at
> org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
> at
> org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
> at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
> at java.lang.Thread.run(Unknown Source)
>
>
>
>
>
> Thanks and Regards,
>
> Crazy Worker
>
>
>
> --
> View this message in context:
> http://www.nabble.com/Logic-Iterate-problem-tp21462092p21462092.html
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>
>
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