Null Pointer Exception

**harkrisz** · 02/11/2012, 18h17

J'ai rien fais, mais maintenant j'ai ça:

connexion
catalogue
catalogue2
nov. 02, 2012 6:10:30 PM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: "Servlet.service()" pour la servlet jsp a lancé une exception
java.lang.NullPointerException
at org.apache.jsp.WEB_002dINF.pages.catalogue_jsp._jspService(catalogue_jsp.java:104)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at controleur.controleur.doGet(controleur.java:118)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

nov. 02, 2012 6:10:30 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [form] in context with path [/ApplicLogin] threw exception [An exception occurred processing JSP page /WEB-INF/pages/catalogue.jsp at line 37

34:
35: <%
36: HashSet<Article> maList = (HashSet<Article>) session.getAttribute("maList");
37: if (maList.size() > 0) {
38: %>
39:
40: <table border='1'><tr><th>Produit</th><th>Quantité</th><th colspan='3'>Options</th></tr>

Stacktrace:] with root cause
java.lang.NullPointerException
at org.apache.jsp.WEB_002dINF.pages.catalogue_jsp._jspService(catalogue_jsp.java:104)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at controleur.controleur.doGet(controleur.java:118)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

**fxrobin** · 02/11/2012, 18h45

Regarde ton URL ne contient QUE "catalogue" :

/ApplicLogin/ctrl?section=catalogue&cat=Ouvrir

il faut que ton navigateur appelle cet URL :

ApplicLogin/ctrl?section=catalogue,panier&cat=Ouvrir

pour que ton contrôleur passe dans le second "IF", celui qui met "maList" en session.

Sinon ce sera toujours NULL.

**harkrisz** · 02/11/2012, 18h58

Ah, oui, tu as raison, j'ai changé la chemain. Maintenant ça passe dans le if panier, mais j'ai toujours l'exception.

http://localhost:8080/ApplicLogin/ct...ier&cat=Ouvrir

INFO: Server startup in 5309 ms
connexion
/WEB-INF/pages/bienvenue.jsp / connexion
catalogue
catalogue2
panier
/WEB-INF/pages/panier.jsp / catalogue,panier
nov. 02, 2012 6:54:32 PM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: "Servlet.service()" pour la servlet jsp a lancé une exception
java.lang.NullPointerException
at org.apache.jsp.WEB_002dINF.pages.panier_jsp._jspService(panier_jsp.java:84)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at controleur.controleur.doGet(controleur.java:121)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

nov. 02, 2012 6:54:32 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [form] in context with path [/ApplicLogin] threw exception [java.lang.NullPointerException] with root cause
java.lang.NullPointerException
at org.apache.jsp.WEB_002dINF.pages.panier_jsp._jspService(panier_jsp.java:84)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at controleur.controleur.doGet(controleur.java:121)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Dans la navigateur:

Etat HTTP 500 - java.lang.NullPointerException

type Rapport d''exception

message java.lang.NullPointerException

description Le serveur a rencontré une erreur interne qui l''a empêché de satisfaire la requête.

exception

org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:549)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
controleur.controleur.doGet(controleur.java:121)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

cause mère

java.lang.NullPointerException
org.apache.jsp.WEB_002dINF.pages.panier_jsp._jspService(panier_jsp.java:84)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
controleur.controleur.doGet(controleur.java:121)
javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

note La trace complète de la cause mère de cette erreur est disponible dans les fichiers journaux de Apache Tomcat/7.0.32.
Apache Tomcat/7.0.32

**fxrobin** · 02/11/2012, 19h49

sauf que cette fois-ci l'erreur est dans la page "panier.jsp" comme l'indique ta stacktrace ...

tu peux montrer le stacktrace complète, sinon on trouveras jamais ton erreur.
il faut que tu soies bien conscient que tu ne pourras rediriger vers qu'une SEULE JSP ... donc ... ton algorithme va être à revoir, surtout celui qui détermine l'URL de la JSP à afficher.

**harkrisz** · 02/11/2012, 20h20

Je n'ai plus de panier.jsp. J'ai mis ensemble la catalogue.jsp et le panier.jsp, et maintenant j'ai seulment la catalogue.jsp

Stacktrace complète:nov. 02, 2012 8:09:45 PM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre7\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre7/bin/client;C:/Program Files/Java/jre7/bin;C:/Program Files/Java/jre7/lib/i386;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Dell\DW WLAN Card;C:\Users\khi\Downloads\eclipse-jee-juno-SR1-win32\eclipse;;.
nov. 02, 2012 8:09:45 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Catalogue' did not find a matching property.
nov. 02, 2012 8:09:45 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:ApplicLogin' did not find a matching property.
nov. 02, 2012 8:09:45 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Application_WEB' did not find a matching property.
nov. 02, 2012 8:09:45 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
nov. 02, 2012 8:09:45 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
nov. 02, 2012 8:09:45 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 465 ms
nov. 02, 2012 8:09:45 PM org.apache.catalina.core.StandardService startInternal
INFO: Démarrage du service Catalina
nov. 02, 2012 8:09:45 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.32
nov. 02, 2012 8:09:51 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
nov. 02, 2012 8:09:51 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
nov. 02, 2012 8:09:51 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 5473 ms
connexion
/WEB-INF/pages/bienvenue.jsp / connexion
catalogue
catalogue2
panier
/WEB-INF/pages/catalogue.jsp / catalogue,panier
nov. 02, 2012 8:09:59 PM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: "Servlet.service()" pour la servlet jsp a lancé une exception
java.lang.NullPointerException
at org.apache.jsp.WEB_002dINF.pages.catalogue_jsp._jspService(catalogue_jsp.java:103)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at controleur.controleur.doGet(controleur.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

nov. 02, 2012 8:09:59 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [form] in context with path [/ApplicLogin] threw exception [An exception occurred processing JSP page /WEB-INF/pages/catalogue.jsp at line 36

33:
34: <%
35: HashSet<Article> maList = (HashSet<Article>) session.getAttribute("maList");
36: if (maList.size() > 0) {
37: %>
38:
39: <table border='1'>

Stacktrace:] with root cause
java.lang.NullPointerException
at org.apache.jsp.WEB_002dINF.pages.catalogue_jsp._jspService(catalogue_jsp.java:103)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at controleur.controleur.doGet(controleur.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Controleur:

Code :

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package controleur;
 
import java.io.IOException;
import java.util.ArrayList;
 
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
 
import metier.MetierPanier;
 
import beans.beanPanier;
 
import pojo.Produit;
 
/**
 * Servlet implementation class Controleur
 */
@WebServlet("/controleur")
public class controleur extends HttpServlet {
 
	private Cookie getCookie(Cookie cookies[], String name) {
		if (cookies != null) {
			for (Cookie c : cookies) {
				if (c.getName().equals(name)) {
					return c;
				}
			}
		}
 
		return null;
	}
 
	/**
         * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
         *      response)
         */
	protected void doGet(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
 
		response.setContentType("text/html;charset=ISO-8859-1");
 
		ServletContext application = this.getServletContext();
		HttpSession session = request.getSession();
 
		String url = "/index.jsp";
 
		String section = request.getParameter("section");
		if (section == null) {
			url = "/WEB-INF/pages/erreur.jsp";
		} else {
			if (section.contains("catalogue")) {
				System.out.println("catalogue");
				MetierPanier mp = MetierPanier.getInstance();
				request.setAttribute("catalogue", mp.selectAll());
				System.out.println("catalogue2");
				url = "/WEB-INF/pages/catalogue.jsp";
			}
 
			if (section.contains("panier")) {
				System.out.println("panier");
				if (session.getAttribute("panier") != null) {
					beanPanier bp = new beanPanier();
					session.setAttribute("panier", bp);
					System.out.println("panier2");
					session.setAttribute("maList", bp.getMaList());
					url = "/WEB-INF/pages/catalogue.jsp";
				}
				url = "/WEB-INF/pages/catalogue.jsp";
			}
 
			if (section.contains("achat")) {
				System.out.println("achat");
				beanPanier bp = (beanPanier) session.getAttribute("panier");
				MetierPanier mp = MetierPanier.getInstance();
				String ajouter = request.getParameter("ajouter");
				System.out.println("achat2");
				if (ajouter != null) {
					Produit prod = mp.selectProd(Integer.valueOf(ajouter));
					mp.add(bp, prod);
				}
			}
 
			if (section.contains("connexion")) {
				if (request.getParameter("doIt") != null
						&& request.getParameter("login").trim().isEmpty() != true
						&& request.getParameter("mdp").trim().isEmpty() != true
						&& request.getParameter("compagnie").trim().isEmpty() != true) {
					System.out.println("connexion");
 
					url = "/WEB-INF/pages/bienvenue.jsp";
				}
 
				else {
					System.out.println("erreur");
					String er = "login ou mot de passe ou compagnie n'est pas renseigné";
					request.setAttribute("erreur", er);
				}
			}
 
			if (section.contains("delogin")) {
				System.out.println("deconnexion");
				if (request.getParameter("delogin") != null) {
					// Cookie c = getCookie(request.getCookies(), "login");
					// c.setMaxAge(0);
					// response.addCookie(c);
					url = "/index.jsp";
				}
			}
		}
		System.out.println(url + " / " + request.getParameter("section"));
 
			getServletContext().getRequestDispatcher(url).forward(request, response);
 
	}
}

catalogue.jsp

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<%@page import="java.util.List"%>
<%@page import="pojo.Produit"%>
<%@page import="beans.Article"%>
<%@page import="java.util.HashSet"%>
 
 
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
	pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<div>
    <h3> Notre catalogue</h3>
    <table border='1'><tr><th>Produit</th><th>PrixHT</th><th></th></tr>
        <%
            List<Produit> tout = (List<Produit>) request.getAttribute("catalogue");
            for (Produit p : tout) {
                out.println("<tr><td>" + p.getLibelProd() + "</td><td>"
                        + p.getPrixHT() + "</td><td><a href='Controleur?section=achat&ajouter="
                        + p.getIdProd() + "'>"
                        + "ajouter</a></td></tr>");
            }
        %>
    </table> 
    <hr />
 
    <div class="panier">
		<h2 class="titre">Panier</h2>
 
		<%
			HashSet<Article> maList = (HashSet<Article>) session.getAttribute("maList");
			if (maList.size() > 0) {
		%>
 
		<table border='1'>
			<tr>
				<th>Produit</th>
				<th>Quantité</th>
				<th colspan='3'>Options</th>
			</tr>
 
			<%
				for (Article p : maList) {
						out.println("<tr><td><label>"
								+ p.getLibelProd()
								+ "</label></td><td><label>"
								+ p.getQte()
								+ "</label></td><td><a href='ctrl?section=achat&supprim="
								+ p.getIdProd() + "'>" + "suppr</a></td>"
								+ "<td><a href='ctrl?section=achat&plus="
								+ p.getIdProd() + "'>" + "plus</a></td>"
								+ "<td><a href='ctrl?section=achat&moins="
								+ p.getIdProd() + "'>" + "moins</a></td></tr>");
					}
			%>
 
 
		</table>
		<a href="ctrl?section=achat&vider=ok">Vider Panier</a>
		<%
			} else {
				out.println("Votre panier est vide");
			}
		%>
	</div>
</div>	
</body>
</html>

**fxrobin** · 02/11/2012, 20h58

j'arrive pas à comprendre ce que fais ceci :

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beanPanier bp = new beanPanier();
session.setAttribute("panier", bp);
System.out.println("panier2");
session.setAttribute("maList", bp.getMaList());

il faut que tu cherches pourquoi "maList" est null ...
soit parce que maList n'est pas mise dans la session "peu probable"
soit parce que tu ne passes pas par ces lignes de code
soit parce que bp.getMaList() te renvoie null ...

tu dois chercher "en mode debug" ... tu passeras moins de temps à chercher.

**harkrisz** · 02/11/2012, 21h14

Ca marche! Merci beaucoup pour ton aide!!!

C'était dans le controleur, il fallait changer de if (session.getAttribute("panier") != null) au if (session.getAttribute("panier") == null)

**fxrobin** · 02/11/2012, 22h20

n'oublie pas de passer ce fil de discussion à "résolu"

**harkrisz** · 03/11/2012, 16h12

Malheureusement j'ai de nouveau une exception

quand je veux ajouter un produit au panier. J'ai vérifié la chemain, http://localhost:8080/ApplicLogin/ct...chat&ajouter=1 Et je passe dans le if achat où je veux, mais mon produit n'affiche pas dans le panier, et j'ai une exception. Je suis vraiment déséspéré.

Le controleur:

Code :

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			if (section.contains("achat")) {
				System.out.println("achat");
				beanPanier bp = (beanPanier) session.getAttribute("panier");
				MetierPanier mp = MetierPanier.getInstance();
				String ajouter = request.getParameter("ajouter");
				System.out.println("achat2");
				if (ajouter != null) {
					System.out.println("achat3");
					Produit prod = mp.selectProd(Integer.valueOf(ajouter));
					mp.add(bp, prod);
				}
				url = "/WEB-INF/pages/catalogue.jsp";
			}

Stracktrace:

nov. 03, 2012 4:16:06 PM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre7\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre7/bin/client;C:/Program Files/Java/jre7/bin;C:/Program Files/Java/jre7/lib/i386;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Dell\DW WLAN Card;C:\Users\khi\Downloads\eclipse-jee-juno-SR1-win32\eclipse;;.
nov. 03, 2012 4:16:06 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Catalogue' did not find a matching property.
nov. 03, 2012 4:16:06 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:ApplicLogin' did not find a matching property.
nov. 03, 2012 4:16:06 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Application_WEB' did not find a matching property.
nov. 03, 2012 4:16:06 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
nov. 03, 2012 4:16:06 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
nov. 03, 2012 4:16:06 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 487 ms
nov. 03, 2012 4:16:06 PM org.apache.catalina.core.StandardService startInternal
INFO: Démarrage du service Catalina
nov. 03, 2012 4:16:06 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.32
nov. 03, 2012 4:16:12 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
nov. 03, 2012 4:16:12 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
nov. 03, 2012 4:16:12 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 5120 ms
connexion
/WEB-INF/pages/bienvenue.jsp / connexion
catalogue
catalogue2
panier
panier2
/WEB-INF/pages/catalogue.jsp / catalogue,panier
achat
achat2
achat3
/WEB-INF/pages/catalogue.jsp / achat
nov. 03, 2012 4:16:22 PM org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: "Servlet.service()" pour la servlet jsp a lancé une exception
java.lang.NullPointerException
at org.apache.jsp.WEB_002dINF.pages.catalogue_jsp._jspService(catalogue_jsp.java:86)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at controleur.controleur.doGet(controleur.java:122)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

nov. 03, 2012 4:16:22 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [form] in context with path [/ApplicLogin] threw exception [java.lang.NullPointerException] with root cause
java.lang.NullPointerException
at org.apache.jsp.WEB_002dINF.pages.catalogue_jsp._jspService(catalogue_jsp.java:86)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
at controleur.controleur.doGet(controleur.java:122)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1002)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

**fxrobin** · 03/11/2012, 17h29

C'est parce que FRANCHEMENT, ton algorithme avec ton contrôleur est loin d'être propre.

NullPointer, c'est parce que tu déclenches une méthode sur un Objet qui est NULL ... par exemple "maList.size()" ... tu cherches à déclencher "size()" alors que "maList" est null ...

donc la question après, n'est qu'une question de LOGIQUE ...
Pourquoi est-ce nul ? parce que tu ne passe pas par la portion de code qui met une instance VALIDE ...

Bref, tu dois chercher en MODE DEBUG ... et ne pas t'alarmer quand tu tombes sur cette exception, qui est NORMALEMENT, l'une des plus facile à trouver.

ici, avec la stacktrace que tu donnes (et qui n'est pas complète) on voit que le problème vient ENCORE de la lecture d'une liste qui n'a pas été récupérée correctement dans catalogue.jsp ...

Tu dois donc revoir TON ALGORITHME COMPLET.
et éviter de tout faire dans une seule méthode "celle de ton contrôleur".
Crée des méthodes : c'est gratuit. Divise ton contrôleur, il n'en sera que plus clair et éviter des if de if de if de if ...

Null Pointer Exception

Développement Web en Java

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