Forward action avec struts

Bonjour,

J'ai un problème tout bête. Je suis une jsp, je clique sur un bouton qui génére un fichier xls via un flux.
Par contre, si il n'ya rien dans le fichier (car pas de donnéess en base), je génére une feuille excel vierge pour que ça ne planate pas. Mais je prefererai ne pas ouvrir de fichier excel et faire un forward sur ma page de sélection avec un message style "Pas de données pour ce client".

Et je bloque ... :oops:

Voici ma classe AbstractXlsAction.java
en gras, la partie qui gère s'i y a des données dans le fichier excel

Code:

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/**
 * 
 */


import java.io.IOException;
import java.util.Locale;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;



/**
 * Action abstraite à surclasser par toutes les actions qui génèrent des
 * éditions Excel.
 * 
 * 
 */
public abstract class AbstractXlsAction extends AbstractAction {

	/*
	 * (non-Javadoc)
	 * 
	 * @see bnppi.ereport.struts.AbstractAction#handleContentType(javax.servlet.http.HttpServletResponse)
	 */
	protected void handleContentType(HttpServletResponse response) {
		response.setContentType("application/excel");
	}

	/**
	 * Renseigne le champ content-disposition dans l'entête de la réponse HTTP
	 * 
	 * @param response
	 * @param fileName
	 */
	protected void handleContentDisposition(HttpServletResponse response,
			String fileName) {
		response.setHeader("content-disposition", "attachment; filename="
				+ fileName);
	}

	/**
	 * Génère l'édition et la renvoie à la sortie
	 */
	protected ActionForward perform(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		try {
			User user = this.getConnectedUser(request);
			String uid = user.getUidUtilisateur();
			Locale locale = this.getSelectedLocale(request);
			// remplit la table du rapport
			fillTableReport(form, uid, locale);
			// exécute l'édition jasperReports
			HSSFWorkbook wkb = generateWorkbook(request, uid);
			// affine la mise en page
			manageResponse(wkb,response,request,uid,mapping);
		} catch (IOException ioe) {
			throw convertSystemException(ioe);
		}
		return null;
	}

	/**
	 * Remplit la table du rapport (proc stockée)
	 * 
	 * @param form
	 * @param userId
	 */
	protected abstract void fillTableReport(ActionForm form, String userId, Locale locale);

	/**
	 * Génère le rapport excel (jasper reports)
	 * 
	 * @param request
	 * @param userId
	 * @return
	 * @throws IOException
	 */
	protected abstract HSSFWorkbook generateWorkbook(
			HttpServletRequest request, String userId) throws IOException;

	/**
	 * Affine la mise en page du rapport
	 * 
	 * @param wkb
	 */
	protected abstract void handleWorkbookLayout(HSSFWorkbook wkb);

	/**
	 * Renvoie le nom du ficher à mettre dans content-disposition (pour le
	 * téléchargement)
	 * 
	 * @param userId
	 * @return
	 */
	protected abstract String getFileName(String userId);

	/**
	 * @param response
	 * @param uid
	 * @param wkb
	 * @throws IOException
	 */
	protected void writeResponse(HttpServletResponse response, String uid,
			HSSFWorkbook wkb) throws IOException {
		handleContentType(response);
		handleContentDisposition(response, getFileName(uid));
		wkb.write(response.getOutputStream());
	}

	protected ActionForward findErrorFwd(ActionMapping mapping) {
		return mapping.findForward(FWD_ERROR_TILES);
	}
	
	protected void manageResponse(HSSFWorkbook wkb, HttpServletResponse response, HttpServletRequest request, String uid, ActionMapping mapping) {
		try {
			if(wkb.getNumberOfSheets()>0){
				handleWorkbookLayout(wkb);
				// écrit le résultat à la sortie
				response.reset();
				writeResponse(response, uid, wkb);
			}else{
				//creation d'une feuille vierge
				wkb.createSheet();
				handleWorkbookLayout(wkb);
				// écrit le résultat à la sortie
				response.reset();
				writeResponse(response, uid, wkb);
			}
		} catch (IOException ioe) {
			throw convertSystemException(ioe);
		}
	}
		

}

ma classe métier

Code:

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import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Locale;
 
import javax.servlet.http.HttpServletRequest;
 
import org.apache.poi.hssf.usermodel.HSSFPrintSetup;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.struts.action.ActionForm;
 
 
public class LaunchReporting13Action extends AbstractXlsAction {
 
	/**
         * @param wkb
         */
	protected void handleWorkbookLayout(HSSFWorkbook wkb) {
		HSSFSheet sheet = wkb.getSheetAt(0);
		HSSFPrintSetup ps = sheet.getPrintSetup();
		ps.setLandscape(true);
		sheet.setMargin(HSSFSheet.TopMargin, (double) .10);
		sheet.setMargin(HSSFSheet.BottomMargin, (double) .10);
		sheet.setMargin(HSSFSheet.LeftMargin, (double) .10);
		sheet.setMargin(HSSFSheet.RightMargin, (double) .10);
	}
 
	/**
         * @param request
         * @param userId
         * @return
         * @throws IOException
         */
	protected HSSFWorkbook generateWorkbook(HttpServletRequest request,	String userId) throws IOException {
		Locale locale = this.getLocale(request);
		byte[] excelFile = this.getServiceLocator()
				.getEReportReportingService().dataTableEreport13(userId, locale);
		HSSFWorkbook wkb = new HSSFWorkbook(new ByteArrayInputStream(excelFile));
		return wkb;
	}
 
	/**
         * @param form
         * @param userId
         */
	protected void fillTableReport(ActionForm form, String userId, Locale langue) {
		Criteres13Form fmrIn = (Criteres13Form) form;
		long id = fmrIn.getIdProprietaire();
		String idProprietaire = String.valueOf(id);
		// remplissage de la table du rapport
		this.getServiceLocator().getEReportReportingService().fillTablereport13(
				userId, idProprietaire, langue);
	}
 
	protected String getFileName(String userId) {
		return "reporting13_" + userId + ".xls";
	}
 
}

le struts-config.xml

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<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
          "http://struts.apache.org/dtds/struts-config_1_3.dtd">
<struts-config>
	<!-- ================================================ Form Bean Definitions -->
	<form-beans>
		<!-- sample form bean descriptor for an ActionForm
			<form-bean			name="inputForm"
			type="app.InputForm"/>
			end sample -->
		<form-bean name="aImmeubleListForm"
			type="form.ImmeubleListForm">
		</form-bean>
		<form-bean name="aSwitchForm"
			type="form.SwitchForm">
		</form-bean>
		<form-bean name="aFetchImmeublesForm"
			type="form.FetchImmeublesForm">
		</form-bean>
		<form-bean name="aFetchLotsForm"
			type=form.FetchLotsForm">
		</form-bean>
		<form-bean name="aFetchImmeubleForm"
			type="form.FetchImmeubleForm">
		</form-bean>
		<form-bean name="aLoadEditionsForm"
			type="form.LoadEditionsForm">
		</form-bean>
		<form-bean name="aReporting6Form"
			type="form.Reporting6Form">
		</form-bean>
		<form-bean name="aFetchLotForm"
			type="form.FetchLotForm">
		</form-bean>
		<form-bean name="aCriteres6Form"
			type="form.Criteres6Form">
		</form-bean>
		<form-bean name="aCriteres7Form"
			type="form.Criteres7Form">
		</form-bean>
		<form-bean name="aCriteres3Form"
			type="form.Criteres3Form">
		</form-bean>
		<form-bean name="aCriteres2Form"
			type="form.Criteres2Form">
		</form-bean>
		<form-bean name="aCriteres13Form"
			type="form.Criteres13Form">
		</form-bean>
		<form-bean name="aFetchVerifRegltForm"
			type="form.FetchVerifRegltForm">
		</form-bean>
		<form-bean name="aFetchSearchOrganismeVerifForm"
			type="form.FetchSearchOrganismeVerifForm">
		</form-bean>
		<form-bean name="aDeleteVerifRegltForm"
			type="form.DeleteVerifRegltForm">
		</form-bean>
		<form-bean name="aFetchBudgetsForm"
			type="form.FetchBudgetsForm">
		</form-bean>
		<form-bean name="aDeleteBudgetForm"
			type="form.DeleteBudgetForm">
		</form-bean>
		<!-- sample form bean descriptor for a DynaActionForm
			<form-bean
			name="logonForm"
			type="org.apache.struts.action.DynaActionForm">
			<form-property
			name="username"
			type="java.lang.String"/>
			<form-property
			name="password"
			type="java.lang.String"/>
			</form-bean>
			end sample -->
	</form-beans>
 
 
	<!-- ========================================= Global Exception Definitions -->
 
	<global-exceptions>
		<!-- sample exception handler
			<exception
			key="expired.password"
			type="app.ExpiredPasswordException"
			path="/changePassword.jsp"/>
			end sample -->
	</global-exceptions>
 
 
	<!-- =========================================== Global Forward Definitions -->
 
	<global-forwards>
		<forward name="error" path="/jsp/error.jsp" />
		<forward name="errorTiles" path="layout.error" />
		<forward name="WelcomeAction" path="/WelcomeAction.do" />
		<forward name="SwitchAction" path="/SwitchAction.do" />
		<forward name="LogoutAction" path="/LogoutAction.do" />
		<forward name="FetchImmeublesAction"
			path="/FetchImmeublesAction.do" />
		<forward name="FetchImmeubleAction"
			path="/FetchImmeubleAction.do">
		</forward>
		<forward name="FetchLotsFicheImmeubleAction"
			path="/FetchLotsFicheImmeubleAction.do">
		</forward>
		<forward name="SaveImmeubleAction"
			path="/SaveImmeubleAction.do" />
		<forward name="LoadEditionAction"
			path="/LoadEditionAction.do">
		</forward>
		<forward name="LaunchReporting6" path="/LaunchReporting6.do">
		</forward>
		<forward name="AppelCriteres2Action"
			path="/AppelCriteres2Action.do">
		</forward>
		<forward name="AppelCriteres7Action"
			path="/AppelCriteres7Action.do">
		</forward>
		<forward name="AppelCriteres6Action"
			path="/AppelCriteres6Action.do">
		</forward>
		<forward name="AppelCriteres3Action"
			path="/AppelCriteres3Action.do">
		</forward>
		<forward name="AppelCriteres13Action"
			path="/AppelCriteres13Action.do">
		</forward>
		<forward name="LaunchReporting7" path="/LaunchReporting7.do">
		</forward>
		<forward name="LaunchReporting2" path="/LaunchReporting2.do">
		</forward>
		<forward name="LaunchReporting3" path="/LaunchReporting3.do">
		</forward>
		<forward name="LaunchReporting3" path="/LaunchReporting13.do">
		</forward>
		<forward name="FetchLotAction" path="/FetchLotAction.do">
		</forward>
		<forward name="FetchJsAction" path="/FetchJsAction.do">
		</forward>
		<forward name="FetchVerifRegltAction"
			path="/FetchVerifRegltAction.do">
		</forward>
		<forward name="FetchSearchOrganismeVerifAction"
			path="/FetchSearchOrganismeVerifAction.do">
		</forward>
		<forward name="AddVerifRegltAction"
			path="/AddVerifRegltAction.do">
		</forward>
		<forward name="DeleteVerifRegltAction"
			path="/DeleteVerifRegltAction.do">
		</forward>
		<forward name="FetchBudgetsAction"
			path="/FetchBudgetsAction.do">
		</forward>
		<forward name="AddBudgetAction" path="/AddBudgetAction.do">
		</forward>
		<forward name="DeleteBudgetAction"
			path="/DeleteBudgetAction.do">
		</forward>
	</global-forwards>
 
 
	<!-- =========================================== Action Mapping Definitions -->
 
	<action-mappings>
		<!-- Default "Welcome" action -->
		<!-- Forwards to Welcome.jsp -->
		<action path="/WelcomeAction"
			type="org.springframework.web.struts.DelegatingActionProxy">
			<forward name="success" path="layout.home" />
		</action>
		<action path="/SwitchAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aSwitchForm" scope="request" validate="true">
		</action>
		<action path="/LogoutAction"
			type="org.springframework.web.struts.DelegatingActionProxy">
		</action>
		<action path="/FetchImmeublesAction"
			type="org.springframework.web.struts.DelegatingActionProxy">
			<forward name="success" path="/jsp/liste_immeubles.jsp">
			</forward>
		</action>
		<action path="/FetchLotsAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aFetchLotsForm" scope="request">
			<forward name="success" path="/jsp/liste_lots.jsp">
			</forward>
		</action>
		<action path="/FetchImmeubleAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			scope="request" name="aFetchImmeubleForm">
			<forward name="success" path="/jsp/fiche_immeuble.jsp">
			</forward>
		</action>
		<action path="/FetchLotsFicheImmeubleAction"
			name="aFetchLotsForm"
			type="org.springframework.web.struts.DelegatingActionProxy"
			scope="request">
			<forward name="success"
				path="/jsp/liste_lots_immeuble.jsp">
			</forward>
		</action>
		<action path="/SaveImmeubleAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aFetchImmeubleForm" scope="request">
			<forward name="success" path="/FetchImmeublesAction.do">
			</forward>
		</action>
		<action path="/LoadEditionAction" name="aLoadEditionsForm"
			type="org.springframework.web.struts.DelegatingActionProxy"
			scope="request">
			<forward name="success" path="/jsp/liste_editions.jsp">
			</forward>
		</action>
		<action path="/LaunchReporting6" name="aCriteres6Form"
			type="org.springframework.web.struts.DelegatingActionProxy"
			scope="request">
		</action>
		<action path="/LaunchReporting2" name="aCriteres2Form"
			type="org.springframework.web.struts.DelegatingActionProxy"
			scope="request">
		</action>
		<action path="/LaunchReporting7" name="aCriteres7Form"
			type="org.springframework.web.struts.DelegatingActionProxy"
			scope="request">
		</action>
		<action path="/LaunchReporting3" name="aCriteres3Form"
			type="org.springframework.web.struts.DelegatingActionProxy"
			scope="request">
		</action>
		<action path="/LaunchReporting13" name="aCriteres13Form"
			type="org.springframework.web.struts.DelegatingActionProxy"
			scope="request">
		</action>
		<action path="/FetchLotAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			scope="request" name="aFetchLotForm">
			<forward name="success" path="/jsp/fiche_lot.jsp"></forward>
		</action>
		<action path="/SaveLotAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aFetchLotForm" scope="request">
			<forward name="success" path="/FetchImmeubleAction.do">
			</forward>
		</action>
		<action path="/AppelCriteres6Action"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aCriteres6Form" scope="request">
			<forward name="success"
				path="/jsp/critere_selection_ereport6.jsp">
			</forward>
		</action>
		<action path="/AppelCriteres7Action"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aCriteres7Form" scope="request">
			<forward name="success"
				path="/jsp/critere_selection_ereport7.jsp">
			</forward>
		</action>
		<action path="/AppelCriteres2Action"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aCriteres2Form" scope="request">
			<forward name="success"
				path="/jsp/critere_selection_ereport2.jsp">
			</forward>
		</action>
		<action path="/AppelCriteres3Action"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aCriteres3Form" scope="request">
			<forward name="success"
				path="/jsp/critere_selection_ereport3.jsp">
			</forward>
		</action>
		<action path="/AppelCriteres13Action"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aCriteres13Form" scope="request">
			<forward name="success"
				path="/jsp/critere_selection_ereport13.jsp">
			</forward>
		</action>
		<action path="/FetchJsAction" forward="/jsp/js.jsp"></action>
		<action path="/FetchVerifRegltAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aFetchVerifRegltForm" scope="request">
			<forward name="success" path="/jsp/fiche_verif_reglt.jsp">
			</forward>
		</action>
		<action path="/FetchSearchOrganismeVerifAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aFetchSearchOrganismeVerifForm" scope="request">
			<forward name="success"
				path="/jsp/dialog_search_organisme_verif.jsp">
			</forward>
		</action>
		<action path="/AddVerifRegltAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aFetchVerifRegltForm" scope="request">
			<forward name="success" path="/FetchVerifRegltAction.do">
			</forward>
		</action>
		<action path="/DeleteVerifRegltAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aDeleteVerifRegltForm" scope="request">
			<forward name="success" path="/FetchVerifRegltAction.do">
			</forward>
		</action>
		<action path="/FetchBudgetsAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aFetchBudgetsForm" scope="request">
			<forward name="success" path="/jsp/fiche_budget.jsp">
			</forward>
		</action>
		<action path="/AddBudgetAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aFetchBudgetsForm" scope="request">
			<forward name="success" path="/FetchBudgetsAction.do">
			</forward>
		</action>
		<action path="/DeleteBudgetAction"
			type="org.springframework.web.struts.DelegatingActionProxy"
			name="aDeleteBudgetForm" scope="request">
			<forward name="success" path="/FetchBudgetsAction.do">
			</forward>
		</action>
		<!-- sample input and input submit actions
 
			<action
			path="/Input"
			type="org.apache.struts.actions.ForwardAction"
			parameter="/pages/Input.jsp"/>
 
			<action
			path="/InputSubmit"
			type="app.InputAction"
			name="inputForm"
			scope="request"
			validate="true"
			input="/pages/Input.jsp"/>
 
			<action
			path="/edit*"
			type="app.Edit{1}Action"
			name="inputForm"
			scope="request"
			validate="true"
			input="/pages/Edit{1}.jsp"/>
 
			end samples -->
	</action-mappings>
	<controller>
		<set-property property="processorClass"
			value="org.springframework.web.struts.DelegatingTilesRequestProcessor" />
	</controller>
 
	<!-- ======================================== Message Resources Definitions -->
 
	<message-resources parameter="resources/MessageResources" />
	<message-resources parameter="typeLot"
		factory="struts.TypeLotMessageResourcesFactory"
		key="typeLot" />
	<message-resources parameter="typeContrat"
		factory="struts.TypeContratMessageResourcesFactory"
		key="typeContrat" />
	<message-resources parameter="typeVerif"
		factory="bnppi.ereport.struts.TypeVerifMessageResourcesFactory"
		key="typeVerif" />
	<message-resources parameter="natureImmeuble"
		factory="struts.NatureImmeubleMessageResourcesFactory"
		key="natureImmeuble" />
	<message-resources parameter="typeImmeuble"
		factory="struts.TypeImmeubleMessageResourcesFactory"
		key="typeImmeuble" />
	<message-resources parameter="typeOccupation"
		factory="struts.TypeOccupationMessageResourcesFactory"
		key="typeOccupation" />
	<message-resources parameter="affectationJuridique"
		factory=".struts.AffectationJuridiqueMessageResourcesFactory"
		key="affectationJuridique" />
	<message-resources parameter="typeCharge"
		factory="bnppi.ereport.struts.TypeChargeMessageResourcesFactory"
		key="typeCharge" />
 
	<!-- =============================================== Plug Ins Configuration -->
 
	<!-- ======================================================= Tiles plugin -->
	<!--
		This plugin initialize Tiles definition factory. This later can takes some
		parameters explained here after. The plugin first read parameters from
		web.xml, thenoverload them with parameters defined here. All parameters
		are optional.
		The plugin should be declared in each struts-config file.
		- definitions-config: (optional)
		Specify configuration file names. There can be several comma
		separated file names (default: ?? )
		- moduleAware: (optional - struts1.1)
		Specify if the Tiles definition factory is module aware. If true
		(default), there will be one factory for each Struts module.
		If false, there will be one common factory for all module. In this
		later case, it is still needed to declare one plugin per module.
		The factory will be initialized with parameters found in the first
		initialized plugin (generally the one associated with the default
		module).
		true : One factory per module. (default)
		false : one single shared factory for all modules
		- definitions-parser-validate: (optional)
		Specify if xml parser should validate the Tiles configuration file.
		true : validate. DTD should be specified in file header (default)
		false : no validation
 
		Paths found in Tiles definitions are relative to the main context.
 
		To use this plugin, download and add the Tiles jar to your WEB-INF/lib
		directory then uncomment the plugin definition below.
	-->
	<plug-in className="org.apache.struts.tiles.TilesPlugin">
		<set-property property="definitions-config"
			value="/WEB-INF/tiles-defs.xml" />
		<set-property property="definitions-parser-validate"
			value="true" />
	</plug-in>
 
 
 
	<!-- =================================================== Validator plugin -->
 
	<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
		<set-property property="pathnames"
			value="/org/apache/struts/validator/validator-rules.xml,
               /WEB-INF/validation.xml" />
	</plug-in>
 
	<!-- =================================================== Spring 2 plugin -->
	<plug-in
		className="org.springframework.web.struts.ContextLoaderPlugIn">
		<set-property property="contextConfigLocation"
			value="/WEB-INF/action-servlet.xml, /WEB-INF/applicationContext.xml" />
	</plug-in>
 
</struts-config>

merci ....

Que se passe t il actuellement ? Tu as un message d erreur ? si oui copie/colle la stacktrace stp.

en fait je génére mon fichier excel avec jasper.
si il n'y a pas d'enregistrement trouvé j'ai le message suivant :

Code:

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Index: 0, Size: 0 
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
          java.util.ArrayList.RangeCheck(ArrayList.java(Inlined Compiled Code)) 
          java.util.ArrayList.get(ArrayList.java(Compiled Code)) 
          org.apache.poi.hssf.usermodel.HSSFWorkbook.getSheetAt(HSSFWorkbook.java:565) 
          bnppi.ereport.action.LaunchReporting13Action.handleWorkbookLayout(LaunchReporting13Action.java:23) 
          bnppi.ereport.struts.AbstractXlsAction.manageResponse(AbstractXlsAction.java:132) 
          bnppi.ereport.struts.AbstractXlsAction.perform(AbstractXlsAction.java:63) 
          bnppi.ereport.struts.AbstractAction.execute(AbstractAction.java:294) 
          org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425) 
          org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228) 
          org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) 
          org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449) 
          javax.servlet.http.HttpServlet.service(HttpServlet.java:743) 
          javax.servlet.http.HttpServlet.service(HttpServlet.java:856) 
          com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1572) 
          com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1521) 
          com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:136) 
          edu.yale.its.tp.cas.client.filter.CASFilter.doFilter(CASFilter.java:75) 
          com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:142) 
          com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:121) 
          com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:82) 
          com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:759) 
          com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3071) 
          com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:236) 
          com.ibm.ws.webcontainer.VirtualHost.handleRequest(VirtualHost.java:210) 
          com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1958) 
          com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:89) 
          com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:472) 
          com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:411) 
          com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:101) 
          com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:566) 
          com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java(Compiled Code)) 
          com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java:952) 
          com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1039) 
          com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))

c'est pourquoi je teste si il existe une feuille dans le fichier excel (=) des enref trouvés dans la base).
s'il n'en trouve pas, je voudrais renvoyer vers une page jsp où je lance l'action qui lance le fichier excel en affichant un message à l'utilisateur.

merci por ton aide....