java 1.5 list iteration using jstl tag

[krish chaitu]

Hi,

iam using struts & jstl as my framework to develop web pages, i have a action class that will call one DAO & that DAO returns a List<DTO>,in my action class i have like

List<DTO> list=dao.getList();
so here iam getting the generic list as return,so i have to display this list in a jsp page while looping through the list

can any one please help me how i can iterate it in jsp page using jstl tag.
i know that we have c:forEach,c:Iterator,but not sure how to iterate java 1.5 list.



Thanks

krish

[Bear Bibeault]

<c:forEach> will iterate over anything that implements List.
[ October 23, 2007: Message edited by: Bear Bibeault ]

[krish chaitu]

Hi,
Thanks for your reply,but still iam confused of using the c:forEach tage,
as i have a List<DTO> list=dao.getList();
so as per jstl c:forEach syntax

<c:forEach var="x" items="..." > ... </c:forEach>
what value do i need to give for var,items,how will i get the list in this tag,
its very confusing,

so please can anyone let me know in detail how to implement this tag for my requirement

Thanks
krish

[Bear Bibeault]

Before forwarding to the JSP, your action class must create a scoped variable using the list. Something perhaps like:

request.setAttribute("xyz",myList);    

Then in the JSP you can use:

<c:forEach items="${xyz}" var="item"> ...    

[krish chaitu]

Hi,
thank you very much for your reply.
my list is generally a java1.5 list,like List<DTO> & from this list i need to get the DTO objects ,so will <c:forEach will only get the values from the DTO .in general we will have fields & corresponding setter & getters.

in normal
we will do like for(DTO dto:List list) & it will get the dto objects,

So can anyone let me know,how will c:forEach approach my requirement.

Thanks
Krish

[Bear Bibeault]

Within the body of the forEach, the scoped variable item will be each element of the List in turn. That means, since your list is a List<DTO>, that each item will be a DTO instance.

[Michael Ku]

You should look on the web for an example of the <c:forEach ...> tag. Find one that uses the EL and dot notation to access object properties.

[Bear Bibeault]

If you are unfamiliar with using the EL, the EL chapter of the JSP spec is a must-read.

[Christophe Verré]

In this case, the JSTL spec is a must-read too. You'll find both here:

JSP 2.0

JSTL 1.1