Never thought of using a taglib?
Cheers
Avlesh
On Sun, Jul 12, 2009 at 8:49 AM, Anthony Frasso <a...@cornell.edu> wrote:
> Hello all, and thank you in advance.
>
> I'm relatively new to struts 2, as I started working with the
> framework about 6 months ago on a part time basis. I'm struggling to
> solve a problem that I would think would be fairly common: displaying
> a tree within a JSP.
>
> Essentially, I have an object (let's call it "Item") that looks
> something like the following:
>
> class Item {
>
> private String name;
> private Set<Item> children;
>
> // getters and setters
> }
>
> Working within a JSP page, I want to display the data within this Item
> as follows:
>
> <ul>
> <li>
> <s:property value="item.name"/>
> <s:iterator value="item.children" var="child">
> <ul>
> <li>
> <s:property value="child.name"/>
> <s:iterator value="child.children" var="grandchild">
> <ul>
> <li>
> <s:property value="grandchild.name"/>
> <s:iterator value="grandchild.child" var
> "greatgrandchild">
> ... and so on
> </s:iterator>
> </li>
> </ul>
> </s:iterator>
> </li>
> </ul>
> </s:iterator>
> </li>
> </ul>
>
> Ideally, I would be able to display this data using some sort of
> recursion, since there's really no way to tell how deep this tree is.
> If anyone knows of a good solution to this problem, I'd be very
> interested in hearing it.
>
> I did come up with what I thought might be a solution using the
> <s:include> tag. I came up with the following:
>
> In the main jsp page, I have:
>
> <ul>
> <li>
> <s:include value="inc/displayItem.jsp">
> <s:param name="item" value="item"/>
> </s:include>
> </li>
> </ul>
>
> In the included jsp page, I have:
>
> <s:property value="item.name"/>
> <s:iterator value="item.children" var="child">
> <ul>
> <li>
> <s:include value="inc/displayItem.jsp">
> <s:param name="item" value="child"/>
> </s:include>
> </li>
> </ul>
> </s:iterator>
>
> This does not work, of course, because a parameter from within an
> included jsp page can only be referenced like this: {$param.item}. In
> addition, I can't use that method to access the included parameter
> within any struts 2 tags (as far as I can tell).
>
> So again, I suppose my question is: is this an appropriate way of
> solving this problem? If so, how can I get this all to work? If not,
> what's a better way of going about this?
>
> Thanks again for all of your help,
> Anthony Frasso
> a...@cornell.edu
>
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>
