Pb avec requete HQL

Bonjour à tous et à toutes je confronte un problème concernant les requêtes HQL
Voici le type d'erreur que je reçoit:
java.lang.IllegalArgumentException: node to traverse cannot be null!
org.hibernate.hql.ast.util.NodeTraverser.traverseDepthFirst(NodeTraverser.java:63)
org.hibernate.hql.ast.QueryTranslatorImpl.parse(QueryTranslatorImpl.java:280)
org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:182)
org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)
org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:98)
org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)
org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1651)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:342)
$Proxy104.createQuery(Unknown Source)
com.hibernate.Utilisateur.logging(Utilisateur.java:150)
Servlet.Login.doPost(Login.java:45)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

et voici le code approprié dans ma servlet:

Code:

---

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub   String ident=request.getParameter("login"); String password=request.getParameter("pass");   Utilisateur u=new Utilisateur() ; Iterator iter=u.logging(); boolean exit; while ((iter.hasNext() ) && (exit=false)) { Utilisateur u1 = (Utilisateur) iter.next(); int id=u1.getIdentifiant(); String idS=Integer.toString(id); String pass=u1.getPassword(); if(idS.equals(ident) && pass.equals(password)) { exit=true; RequestDispatcher rd=getServletContext().getRequestDispatcher("/page1.jsp"); rd.forward(request,response);   } } RequestDispatcher rd=getServletContext().getRequestDispatcher("/erreur.jsp");   }

---

ainsi que la méthode logging() dans ma classe Utilisateur:

Code:

---

1 2 3 4 5 6 7 8 9 10 11

public Iterator logging()throws HibernateException{   Session session = HibernateUtil.getSessionFactory().getCurrentSession(); session.beginTransaction(); String q="form utilisateur "; Query query=session.createQuery(q); List list=query.list(); Iterator it=list.iterator(); return it;   }

---

Y'a t'il une personne qui pourra m'aider à résoudre ce probléme
Je serais très reconnaissante
Merci;)

le mot clé c'est from, par form!

Merci ,il parait que je me suis trompé en tapant le mot from mais en corrigeant la requete je reçoit ce type d'erreur:
org.hibernate.hql.ast.QuerySyntaxException: utilisateur is not mapped [from utilisateur ]
org.hibernate.hql.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:181)
org.hibernate.hql.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:110)
org.hibernate.hql.ast.tree.FromClause.addFromElement(FromClause.java:94)
org.hibernate.hql.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:316)
org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3228)
org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3112)
org.hibernate.hql.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:720)
org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:571)
org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:288)
org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:231)
org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:254)
org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185)
org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136)
org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101)
org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:98)
org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)
org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1651)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:342)
$Proxy104.createQuery(Unknown Source)
com.hibernate.Utilisateur.logging(Utilisateur.java:150)
Servlet.Login.doPost(Login.java:45)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

Essaiyez de voir avec mois
merci une deuxiéme fois

Je vous fournit ici utilisateur.hbm.xml:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 24 avr. 2011 10:46:38 by Hibernate Tools 3.3.0.GA -->
<hibernate-mapping>
<class name="com.hibernate.Utilisateur" table="utilisateur" catalog="cours">
<id name="identifiant" type="int">
<column name="Identifiant" />
<generator class="assigned" />
</id>
<property name="statut" type="string">
<column name="Statut" length="65535" />
</property>
<property name="nom" type="string">
<column name="Nom" length="20" />
</property>
<property name="prenom" type="string">
<column name="Prenom" length="20" />
</property>
<property name="adresse" type="string">
<column name="adresse" length="65535" />
</property>
<property name="email" type="string">
<column name="email" length="65535" />
</property>
<property name="tel" type="java.lang.Long">
<column name="tel" precision="10" scale="0" />
</property>
<property name="password" type="string">
<column name="password" length="20" />
</property>
<set name="professeurs" table="professeur" inverse="true" lazy="true" fetch="select">
<key>
<column name="Id_utilisateur" not-null="true" />
</key>
<one-to-many class="com.hibernate.Professeur" />
</set>
<set name="etudiants" table="etudiant" inverse="true" lazy="true" fetch="select">
<key>
<column name="Ident" not-null="true" />
</key>
<one-to-many class="com.hibernate.Etudiant" />
</set>
<set name="connecteds" table="connected" inverse="true" lazy="true" fetch="select">
<key>
<column name="Ident" />
</key>
<one-to-many class="com.hibernate.Connected" />
</set>
</class>
</hibernate-mapping>

et voici aussi mon fichier de confiquration:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.bytecode.use_reflection_optimizer">false</property>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.password">maroua</property>
<property name="hibernate.connection.url">jdbc:mysql://127.0.0.1:3306/cours</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="hibernate.search.autoregister_listeners">false</property>
<property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
<property name="current_session_context_class">thread</property>
<property name="hibernate.show_sql">true</property>
<mapping resource="com/hibernate/Connected.hbm.xml" />
<mapping resource="com/hibernate/Tuto.hbm.xml" />
<mapping resource="com/hibernate/MotCle.hbm.xml" />
<mapping resource="com/hibernate/Module.hbm.xml" />
<mapping resource="com/hibernate/Professeur.hbm.xml" />
<mapping resource="com/hibernate/Etudiant.hbm.xml" />
<mapping resource="com/hibernate/Utilisateur.hbm.xml" />
<mapping resource="com/hibernate/Profensi.hbm.xml" />
</session-factory>
</hibernate-configuration>

Ils peuvent vous étre util

C'est bon le probléme est résolu il fallait que je mettait String q=" from com.hibernate.Utilisateur"; et non pas simplement String q=" from Utilisateur";
Merci à vous tous;)