Display tree on JSP, recursion?

[pak]

Hi there

I have a "tree" structure of Node objects, each containing a List of children Node objects etc.

I pass the root Node object to a JSP, and would like to display the tree structure.

How do I display this on a JSP? For example, can I recurse with jstl or spring tags?

Thanks for any help,
Peter

[Alef Arendsen]

You could recurse using JSTL <c:forEach> tags. I suggest you have a look at JSP 2.0 tagfiles, I think they provide a flexible and easy to test wya to do what you want (recursively including JSPs, etcetera).

Alef

http://www.onjava.com/pub/a/onjava/2003/11/05/jsp.html

[Ilya Boyandin]

This JSP includes itself recursively:

   1. ${node.title}  
   2. <div class="children">  
   3. <c:foreach var="node" items="${node.children}">  
   4.     <c:set var="node" value="${node}" scope="request"/>
   5.     <jsp:include page="node.jsp"/>
   6. </c:foreach>  
   7. </div>

Here is a short explanation.

[oracsa]

Google for tree4jsp. The tag looks easily integrable with spring applications, and also provides fairly good tree UI.