remplir une collection à partir d'une autre collection

bonjour tous le monde

j'ai un vue qui contient 2collections

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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
 
<%@ page language="java" pageEncoding="ISO-8859-1"%>
 
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %>
<%@taglib uri="/WEB-INF/struts-layout.tld" prefix="layout" %>
 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html lang="true">
  <head>
    <html:base />
 
    <title>activation</title>
 <layout:skin includeScript="true"/>
 
   <script>
	function setHidden(value){document.activationpostForm.hidden.value=value;}
 
	</script>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
 
 
  </head>
 
  <body>
 
 
 
     <layout:form action="/preactivpost.do" method="post">
      <layout:text property="hidden" value="default" mode="H,H,H"></layout:text>
 
        <layout:collection name="activationpostForm" property="postpaid"  styleClass="SCROLL" styleClass="FORM" width="1110" height="350">
           <layout:collectionItem title="ARTICLE" property="art"></layout:collectionItem>
           <layout:collectionItem title="PROFIL" property="prof" sortable="true"></layout:collectionItem>
           <layout:collectionItem title="SERIAL_START" property="start" sortable="true"></layout:collectionItem>
           <layout:collectionItem title="SERIAL_END" property="end" sortable="true"></layout:collectionItem>
           <layout:collectionItem title="HLR" property="hlr" sortable="true"></layout:collectionItem>
           <layout:collectionItem title="ACTIVATION" property="activ" sortable="true"></layout:collectionItem>
           <layout:collectionItem title="PACKAGING" property="pack" sortable="true"></layout:collectionItem>
           <layout:collectionItem title="QTE" property="qte" sortable="true"></layout:collectionItem>
           <layout:collectionItem title="AJOUTER" property="ajouter" action="/preactive.do?hidden=afficher" paramId="article,profil,s_str,s_end,qute" paramProperty="article,profil,s_str,s_end,qute">
            <center>+</center>
           </layout:collectionItem>
        </layout:collection>
        </layout:form>
        <layout:space></layout:space>
 
 
        <layout:form action="/preactive.do" method="post">
    <logic:notEmpty property="postpaid2" name="activationpostForm">
         <logic:present parameter="hidden" scope="request">
           <logic:equal value="afficher" parameter="hidden" scope="request">
            <logic:present name="activationpostForm">
               <layout:collection name="activationpostForm" property="postpaid2" styleClass="SCROLL" styleClass="FORM" width="900" height="100">
           <layout:collectionItem title="ARTICLE" property="aa"></layout:collectionItem>
           <layout:collectionItem title="PROFIL" property="pp" sortable="true"></layout:collectionItem>
           <layout:collectionItem title="SERIAL_START" property="st" sortable="true"></layout:collectionItem>
           <layout:collectionItem title="SERIAL_END" property="se" sortable="true"></layout:collectionItem>
           <layout:collectionItem title="QTE" property="qt" sortable="true"></layout:collectionItem>
               </layout:collection>
 
        </logic:present>
        </logic:equal>
       </logic:present>
     </logic:notEmpty>
     </layout:form>
 
  </body>
</html:html>

je veux recupérer des lignes à partir de la 1ere collection et les affiche dans le 2eme collection au fur et a mesure

voila le code de l'action

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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
 
public class PreactiveAction extends DispatchAction {
 
	public ActionForward afficher(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		ActivationpostForm activationpostForm = (ActivationpostForm) form;
 
		Preactive pre = new Preactive();
		ArrayList list = new ArrayList();
		ArrayList list2,list4,list3 = new ArrayList();
 
		list2 = (ArrayList)request.getSession().getAttribute("postpaid");
		activationpostForm.setPostpaid(list2);
 
		String article = request.getParameter("article");
		System.out.println(article);
 
		String profil = request.getParameter("profil");
		System.out.println(profil);
 
		String s_str = request.getParameter("s_str");
		System.out.println(s_str);
 
		String s_end = request.getParameter("s_end");
		System.out.println(s_end);
 
		String qute = request.getParameter("qute");
		System.out.println(qute);
 
 list4 = (ArrayList)request.getSession().getAttribute("postpaid2");
		activationpostForm.setPostpaid2(list4);
 
		pre.setAa(article);
		pre.setPp(profil);
		pre.setQt(qute);
		pre.setSe(s_end);
		pre.setSt(s_str);
 
 
		list4.add(pre);
 
 
 
 
		for (int i=0;i<list4.size();i++)
		{
			Preactive ppre = (Preactive)list4.get(i); 
			System.out.println("aa="+ppre.getAa());
			System.out.println("pp="+ppre.getPp());
			System.out.println("st="+ppre.getSt());
			System.out.println("se="+ppre.getSe());
			System.out.println("qt="+ppre.getQt());
		}
 
 
		activationpostForm.setPostpaid2(list4);
 
 
		request.getSession().setAttribute("postpaid2",list4);
 
		return mapping.findForward("active"); 
	}

je pense que pour garder l'ancienne collection je doit la mettre dans le request avan d'ajouter une autre ligne

mais il m'affiche l'erreur

Code:

1
2
 
null pointer exception