EL表達式中的OR條件如何？

Question

我想作一個OR條件在此菜單：

<li class="#{facesContext.viewRoot.viewId == ('/company/team.xhtml' or '/company/partnerships.xhtml') ? 'active' : '' }"><a class="item" href="company/company.xhtml">Company</a> 
    <ul> 
     <li><a href="company/team.xhtml">Team</a></li> 
     <li><a href="company/partnerships.xhtml">Partnerships</a></li> 
    </ul> 
</li> 

，如果team.xthml或partnerships.xhtml頁面由用戶選擇的「活躍」值將在<li>標籤來設置它。

Answer 1

這是正確的語法：

<li class="#{facesContext.viewRoot.viewId == '/company/team.xhtml' or facesContext.viewRoot.viewId == '/company/partnerships.xhtml' ? 'active' : '' }"> 

爲了使它有點短，你可以使用#{view}代替#{facesContext.viewRoot}：

<li class="#{view.viewId == '/company/team.xhtml' or view.viewId == '/company/partnerships.xhtml' ? 'active' : '' }"> 

爲了使它又短，你可以別名#{view.viewId}與<c:set>：

<c:set var="viewId" value="#{view.viewId}" scope="request" /> 
... 
<li class="#{viewId == '/company/team.xhtml' or viewId == '/company/partnerships.xhtml' ? 'active' : '' }">