Erro ao converter int pra string no param

Front-end
#1

como eu faço para converter um int para string nessa pagina
eu possuo o id da cidade do tipo int, mas aqui ele tá dando um erro, acho por que no <f:param tem que ser string o value ou não?

o erro que tá dando é o seguinte:

14/10/2007 15:44:35 org.apache.catalina.core.ApplicationDispatcher invoke SEVERE: Servlet.service() for servlet jsp threw exception java.lang.ClassCastException: java.lang.Integer at com.sun.rave.web.ui.appbase.renderer.CommandLinkRenderer.encodeBegin(CommandLinkRenderer.java:201) at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:703) at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:463) at com.sun.faces.renderkit.html_basic.TableRenderer.encodeChildren(TableRenderer.java:277) at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721) at javax.faces.webapp.UIComponentTag.encodeChildren(UIComponentTag.java:629) at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:566) at com.sun.faces.taglib.html_basic.DataTableTag.doEndTag(DataTableTag.java:491) at org.apache.jsp.Cidade.listarCidade_jsp._jspx_meth_h_dataTable_0(listarCidade_jsp.java:193) at org.apache.jsp.Cidade.listarCidade_jsp._jspx_meth_h_form_0(listarCidade_jsp.java:149) at org.apache.jsp.Cidade.listarCidade_jsp._jspx_meth_f_view_0(listarCidade_jsp.java:116) at org.apache.jsp.Cidade.listarCidade_jsp._jspService(listarCidade_jsp.java:78) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301) at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:346) at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:152) at com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.renderView(ViewHandlerImpl.java:285) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107) at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:137) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:214) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at com.sun.rave.web.ui.util.UploadFilter.doFilter(UploadFilter.java:198) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at persistencia.Db4oFilter.doFilter(Db4oFilter.java:20) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) 14/10/2007 15:44:35 org.apache.catalina.core.ApplicationContext log SEVERE: org.apache.jasper.JasperException: javax.servlet.jsp.JspException: java.lang.Integer javax.faces.FacesException: org.apache.jasper.JasperException: javax.servlet.jsp.JspException: java.lang.Integer at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:351) at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:152) at com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.renderView(ViewHandlerImpl.java:285) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107) at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:137) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:214) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at com.sun.rave.web.ui.util.UploadFilter.doFilter(UploadFilter.java:198) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at persistencia.Db4oFilter.doFilter(Db4oFilter.java:20) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) Caused by: org.apache.jasper.JasperException: javax.servlet.jsp.JspException: java.lang.Integer at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301) at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:346) ... 29 more 14/10/2007 15:44:35 org.apache.catalina.core.StandardWrapperValve invoke SEVERE: Servlet.service() for servlet Faces Servlet threw exception com.sun.rave.web.ui.appbase.ApplicationException: org.apache.jasper.JasperException: javax.servlet.jsp.JspException: java.lang.Integer at com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.cleanup(ViewHandlerImpl.java:559) at com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.renderView(ViewHandlerImpl.java:290) at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107) at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245) at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:137) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:214) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at com.sun.rave.web.ui.util.UploadFilter.doFilter(UploadFilter.java:198) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at persistencia.Db4oFilter.doFilter(Db4oFilter.java:20) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684) at java.lang.Thread.run(Thread.java:595) Caused by: javax.faces.FacesException: org.apache.jasper.JasperException: javax.servlet.jsp.JspException: java.lang.Integer at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:351) at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:152) at com.sun.rave.web.ui.appbase.faces.ViewHandlerImpl.renderView(ViewHandlerImpl.java:285) ... 27 more Caused by: org.apache.jasper.JasperException: javax.servlet.jsp.JspException: java.lang.Integer at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672) at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463) at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398) at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301) at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:346) ... 29 more

será que tenho que colocar um <f:convertNumber/> dentro do <f:param> ?

o meu jsp é o seguinte:

<h:form> <h:dataTable value="#{listaCidade.cidades}" var="cidade"> <h:column> <f:facet name="header"> <h:outputText value="Nome"/> </f:facet> <h:outputText value="#{cidade.nome}"/> </h:column> <h:column> <f:facet name="header"> <h:outputText value="Estado"/> </f:facet> <h:outputText value="#{cidade.estado}"/> </h:column> <h:column> <f:facet name="header"> <h:outputText value="Estado"/> </f:facet> <h:outputText value="#{cidade.estado}"/> </h:column> <h:column> <f:facet name="header"> <h:outputText value="Excluir"/> </f:facet> <h:commandLink immediate="true" action="#{listaCidade.excluir}"> <f:param name="excluir" value="#{cidade.id}"/> <h:outputText value="Excluir"/> </h:commandLink> </h:column>

#2