Bonjour à tous j'ai un petit problème que j'arrive à le résoudre puisque je suis débutant en struts.

j'ai un tableau qui affiche une liste à la fin de chaque ligne il y a un lien qui affiche un formulaire de modification.
tout marche très bien. le formulaire de modification est initialisé par des données et l'utilisateur dois les modifier mais j'ai un problème avec la validation du champs mail.
voici la trace d'erreur

GRAVE: "Servlet.service()" pour la servlet jsp a lanc� une exception
javax.servlet.jsp.JspException: Cannot find bean user in any scope
at org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:934)
at org.apache.struts.taglib.html.BaseFieldTag.prepareValue(BaseFieldTag.java:121)
at org.apache.struts.taglib.html.BaseFieldTag.renderInputElement(BaseFieldTag.java:102)
at org.apache.struts.taglib.html.BaseFieldTag.doStartTag(BaseFieldTag.java:81)
at org.apache.jsp.UpdateUser_jsp._jspx_meth_html_005ftext_005f0(UpdateUser_jsp.java:270)
at org.apache.jsp.UpdateUser_jsp._jspx_meth_html_005fform_005f0(UpdateUser_jsp.java:203)
at org.apache.jsp.UpdateUser_jsp._jspx_meth_html_005fhtml_005f0(UpdateUser_jsp.java:129)
at org.apache.jsp.UpdateUser_jsp._jspService(UpdateUser_jsp.java:84)
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.action.RequestProcessor.doForward(RequestProcessor.java:1063)
at org.apache.struts.action.RequestProcessor.internalModuleRelativeForward(RequestProcessor.java:1001)
at org.apache.struts.action.RequestProcessor.processValidate(RequestProcessor.java:966)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:204)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
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(Thread.java:595)
14 août 2008 09:49:39 org.apache.catalina.core.StandardWrapperValve invoke.

Voici la jsp qui affiche la liste
<CODE>
<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<%@taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@taglib uri="/WEB-INF/struts-nested.tld" prefix="nested" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Listing all users</title>
</head>

<body>
<center><h3>User List</h3></center>
<html:errors/>

<logic:present name="list">
<table border="0" cellspacing="0" cellpadding="0" align="center" width="70%" style="border-collapse:collapse;">
<tr bgcolor="#98AFCC">
<th>User ID</th>
<th>First Name</th>
<th>Last Name</th>
<th>Email</th>
</tr>
<%boolean even = false; %>
<logic:iterate id="user" name="list" indexId="userId">
<% even = !even; %>
<tr bgcolor="<%=even?"#B7D3F5":"#D6E0F5" %>">
<td>
<bean:write name="user" property="userId" />
</td>
<td>
<bean:write name="user" property="firstName" />
</td>
<td>
<bean:write name="user" property="lastName" />
</td>
<td>
<bean:write name="user" property="email" />
</td>
<td>
<html:link href="ForwordUserToModify.do" paramId="userId" paramName="user" paramProperty="userId" >Modify</html:link>
</td>
</tr>
</logic:iterate>
<tr>
<td colspan="6" align="center">
<a href="adduser.jsp">Add New User</a>
</td>
</tr>
</table>
</logic:present>

</body>
</html>

</CODE>

Voici l'action du lien qui remplis la formulaire
<CODE>
package com.struts.action;

import java.sql.SQLException;
import java.util.LinkedList;
import java.util.List;

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

import org.hibernate.HibernateException;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import com.struts.beans.User;
import com.struts.db.UserManager;



public class ForwardUserFromId extends Action {




public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
//Get a list of users and save to the request
String userid = request.getParameter("userId");
User usr = new User();
// List list = new LinkedList();
try {
usr= UserManager.getInstance().getUser(userid);// récupération du Bean User àpartir de l'id
//list.add(usr);
request.setAttribute("user", usr);System.out.print("User intercepted success");
} catch (SQLException e) {
// TODO Auto-generated catch block
request.setAttribute("User", usr);
ActionMessages errors = new ActionMessages();
ActionMessage error = new ActionMessage("error.generic",e.getMessage());
errors.add("error",error);
saveErrors(request, errors);
e.printStackTrace();
}
return mapping.findForward("success");
}
}
</CODE>

et puis voici la jsp du formulaire

<CODE>
<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html lang="true">
<head>
<html:base />
<title>Modify user</title>
</head>
<body>
<center><h3>Modify User</h3></center>
<CENTER><html:errors/></CENTER>

<html:form action="/Updateuser" method="post">

<table border="0" align="center">
<tr>
<td>User ID:</td>
<td><html:text name="user" property="userId" /></td>
</tr>
<tr>
<td>First Name:</td>
<td><html:text name="user" property="firstName" /></td>
</tr>
<tr>
<td>Last Name:</td>
<td><html:text name="user" property="lastName" /></td>
</tr>
<tr>
<td>Age:</td>
<td><html:text name="user" property="age" /></td>
</tr>
<tr>
<td>Email:</td>
<td><html:text name="user" property="email" /></td>
</tr>
<tr>
<td colspan="2" align="center"><html:submit /></td>
</tr>
</table>

<center> <a href="manageusers.do">Show users list </a></center>
</html:form>


</body>
</html:html>

</CODE>

et voici le code de l'action de modification
<CODE>
package com.struts.action;
import java.sql.SQLException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import com.struts.beans.User;
import com.struts.db.UserManager;


public class UpdateUser extends Action {


public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
User user = (User) form;

try {
UserManager.getInstance().UpdateUser(user);
} catch (SQLException e) {
ActionMessages errors = new ActionMessages();
ActionMessage error = new ActionMessage("error.generic",e.getMessage());
errors.add("error",error);
saveErrors(request, errors);
e.printStackTrace();
}
return mapping.findForward("success");
}
}
</CODE>

et en fin voici le bean User

<CODE>
package com.struts.beans;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;


public class User extends ActionForm{
private Integer userId=0 ;
private String firstName = "";
private String lastName = "";
private int age = 0;
private String email = "";
private String password = "";

public User(Integer userId) {
super();
this.userId = userId;
}
public User(){
super();
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Integer getUserId() {
return userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public ActionErrors validate(
ActionMapping mapping, HttpServletRequest request ) {

ActionErrors errors = new ActionErrors();
if( getUserId().toString().length()<1 ) {
errors.add("name",new ActionMessage("null.check","User ID"));
}
if(getEmail().length()>0)
{
//Yes! user entered email address. validate it
if(!getEmail().matches("^[a-zA-Z][\\w\\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\\w\\.-]*[a-zA-Z0-9]\\.[a-zA-Z][a-zA-Z\\.]*[a-zA-Z]$")){
errors.add("name",new ActionMessage("email.invalid"));
}
}
return errors;
}
}

</CODE>


je pense que le problème arrive du name="user" dans la jsp de modification aprés validation