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sturts_menu 的源代码 主要提过了常用的menu菜单样式

## The displayMenu macro (at the bottom of this template) is defined in
## struts-menu.jar!/net/sf/displayer/globalMacros.vm. It has a callback to the #menuItem macro
## you see below. You can override this macro by creating a menuMacros.vm template
## at the root of your classpath

#macro( menuItem $menu $level )
  ## set title
  #set ($title = $displayer.getMessage($menu.title))
  #if ($level == 0)
    #if (!$menu.url) $menu.setUrl($menu.components.get(0).url) #end
    <li><a href="$!{menu.url}" title="$title"#if($menu.target)target="$menu.target"#end>${title}</a>
    #if ($menu.components.size() > 0)
      #set ($numItems = $menu.components.size())
      <ul class="submenu">
    #else
      </li>
    #end
  #elseif ($level == 1)
    <li><a href="$menu.url" title="$title"#if($menu.target)target="$menu.target"#end>${title}</a></li>
    #if ($velocityCount == $numItems)
      </ul>
    </li>
    #end
  #end
#end

#displayMenu($menu 0)