bonjour tous le monde

j'ai le code suivant
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 <layout:collection name="collectionForm" property="resultat" styleClass="FORM"  selectName="id" selectProperty="code" selectType="radio" >
     <layout:collectionItem title="CODE TRANSACTION" property="code" ></layout:collectionItem>
     <layout:collectionItem title="DESTINATAIRE" property="dest" sortable="true"></layout:collectionItem>
     <layout:collectionItem title="WAREHOUSE" property="whs" sortable="true"></layout:collectionItem>
     <layout:collectionItem title="DATE" property="date" sortable="true"></layout:collectionItem>
     <layout:collectionItem title="RESPONSABLE" property="resp" sortable="true"></layout:collectionItem>
     <layout:collectionItem title="BON TRANSACTION" property="bon">
       <layout:link action="/visualiser.do">Visualiser le bon</layout:link>
     </layout:collectionItem>
   </layout:collection>
et voici le form:
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public class CollectionForm extends ActionForm {
 
 
	private List resultat;
	private String[]  id;
 
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {
	// TODO Auto-generated method stub
return null;
	}
 
	public void reset(ActionMapping mapping, HttpServletRequest request) {
		// TODO Auto-generated method stub
	}
 
 
	public List getResultat() {
		return resultat;
	}
 
	public void setResultat(List resultat) {
		this.resultat = resultat;
	}
 
	public String[]  getId() {
		return id;
	}
 
	public void setId(String[]  id) {
		this.id = id;
	}
et le bean des collectionItem

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public class Article {
 
	private String code;
	private String dest;
	private String whs;
	private String date;
	private String resp;
	private String code_trans;
 
	public Article(){}
 
	public Article(String code,String date,String dest,String resp,String whs,String code_trans){
 
	this.code=code;
	this.date=date;
	this.dest=dest;
	this.resp=resp;
	this.whs=whs;
	this.code_trans = code_trans;
	}
 
 
public String getCode() {
		return code;
	}
 
public void setCode(String code) {
		this.code = code;
	}
public String getDest() {
		return dest;
	}
 
public void setDest(String dest) {
		this.dest = dest;
	}
 
public String getWhs() {
		return whs;
	}
 
public void setWhs(String whs) {
		this.whs = whs;
	}
public String getDate() {
		return date;
	}
 
public void setDate(String date) {
		this.date = date;
	}
 
public String getResp() {
		return resp;
	}
 
public void setResp(String resp) {
		this.resp = resp;
	}
j'ai une action collectionAction qui rempli la colection

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public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws SQLException {
		CollectionForm collectionForm = (CollectionForm) form;// TODO Auto-generated method stub
 
		Connexion connexion=new Connexion();
		Connection con=connexion.createConnection();
		Statement st = null;
		ResultSet rs = null;
		ArrayList list = new ArrayList();
 
		//Article art = new Article();
		st = con.createStatement();
		rs = st.executeQuery("select trans_type || '-'  ||gss_transaction.whs_id || '-'  ||trans_no as code,dest_nom,whs_adresse,to_char(trans_date, 'DD/MM/YYYY HH24:MI:SS'),act_name from gss_transaction, gss_warehouse, gss_actor, gss_destinataire where (gss_transaction.whs_id = gss_warehouse.whs_id) and (gss_transaction.act_id = gss_actor.act_id) and (gss_transaction.dest_id = gss_destinataire.dest_id) and (gss_transaction.dest_id ='D01') order by trans_no");
 
	while (rs.next())
{
			System.out.println("["+rs.getString(1)+"],["+rs.getString(2)+"],["+rs.getString(3)+"],["+rs.getString(4)+"],["+rs.getString(5)+"]");
			Article art = new Article(rs.getString(1),rs.getString(4),rs.getString(2),rs.getString(5),rs.getString(3),rs.getString(1));
 
   list.add(art);
 
}
 
}
 
collectionForm.setResultat(list);
return mapping.findForward("remplir"); 
}
quand j'ai ajouté "selectName="id" selectProperty="code" selectType="radio" elle marche pas elle m'affiche l'erreur suivante


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org.apache.jasper.JasperException: Cannot find bean under name org.apache.struts.taglib.html.BEAN
	org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:460)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:355)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063)
	org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 
 
cause mère 
 
javax.servlet.ServletException: Cannot find bean under name org.apache.struts.taglib.html.BEAN
	org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:841)
	org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:774)
	org.apache.jsp.forms.collection2_jsp._jspService(collection2_jsp.java:109)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063)
	org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 
 
cause mère 
 
javax.servlet.jsp.JspException: Cannot find bean under name org.apache.struts.taglib.html.BEAN
	fr.improve.struts.taglib.layout.util.LayoutUtils.getBeanFromPageContext(LayoutUtils.java:203)
	fr.improve.struts.taglib.layout.collection.CollectionTag.isCurrentBeanSelected(CollectionTag.java:556)
	fr.improve.struts.taglib.layout.collection.CollectionTag.renderSelection(CollectionTag.java:517)
	fr.improve.struts.taglib.layout.collection.CollectionTag.renderItem(CollectionTag.java:461)
	fr.improve.struts.taglib.layout.collection.CollectionTag.addItem(CollectionTag.java:152)
	fr.improve.struts.taglib.layout.collection.BaseCollectionTag.addItem(BaseCollectionTag.java:318)
	fr.improve.struts.taglib.layout.collection.FastCollectionItemTag.doEndLayoutTag(FastCollectionItemTag.java:185)
	fr.improve.struts.taglib.layout.LayoutTagSupport.doEndTag(LayoutTagSupport.java:47)
	org.apache.jsp.forms.collection2_jsp._jspx_meth_layout_005fcollectionItem_005f0(collection2_jsp.java:488)
	org.apache.jsp.forms.collection2_jsp._jspx_meth_layout_005fcollection_005f0(collection2_jsp.java:437)
	org.apache.jsp.forms.collection2_jsp._jspx_meth_layout_005fhtml_005f0(collection2_jsp.java:170)
	org.apache.jsp.forms.collection2_jsp._jspService(collection2_jsp.java:100)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:331)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:329)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
	org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063)
	org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
	org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
et quand je les enleve il marche normal, il m'affiche bien la collection

(je travaille avec struts layout 1.2 et struts1.2)
j'ai essayer de suivre le site de struts layout mais j'ai pas compris c'est quoi le pb
merci de me repondre