Iterate HashMap in jsp - Struts2

[Arun Christopher]

In my application I have to display menu items from database

Each menu Item(MenuVO) will have a menu-id(menuId), parent-menu-id(parentMenuId), menu-order(menuOrder).

I have a hashmap which contains a menu item as the key and sub menus as ArrayList of menus.

Map<MenuVO,List<MenuVO>> menuMap = new HashMap<MenuVO,List<MenuVO>>();

But the submenu items can also be a parent for a list of sub-sub-menu items.

How can I iterate this recursive HashMap in JSP/java(I can create a custom tag).

The menu will be displayed as

<ul>
<li><a href>Menu1 name</a><li>
<ul><li><a href>Sub Menu1 name</a><li>
</ul>
<ul>

I know the menu goes only 4 or 5 levels deep but I dont want to hardcode 4 or 5 nested iterators in jsp.

Included screenshots for better understanding

Hashmap


Need to be arranged in below fashion and iterated in jsp(struts2)


This is also a similar thread


Thanks,
Arun