这应该有效:

<s:set id="contextPath"  value="#request.get('javax.servlet.forward.context_path')" />
<s:a href="%{contextPath}/clickme" theme="simple">Click here.</s:a>

但是，您不应该这样做.需要网址时，请使用<s:url>标记:

However, you're not supposed to do this. When you need an url, use the <s:url> tag:

<%-- Without specifying an action --%>
<s:url id="myUrl" value="clickme" />
<s:a href="%{myUrl}" theme="simple">Click here.</s:a>

<%-- With an action --%>
<s:url id="myUrl" action="clickme" />
<s:a href="%{myUrl}" theme="simple">Click here.</s:a>

顺便说一句，您不需要表单的action属性的上下文路径:

By the way, you don't need a context path for the action attribute of a form:

<s:form method="post" action="submitme" theme="simple"></s:form>