关于访问jsp:param值,我有一个完全相同的基本问题 a>作为此海报;遵循他的榜样对我完全不起作用.通过
I have exactly the same basic question about accessing jsp:param values as this poster; following his example exactly does not work for me. The parameters passed in via jsp:include don't seem to show up in the included file. Is there something peculiar about my setup?
来电者:
<div> <jsp:include page="../../../common/callee.jsp"> <jsp:param name="justinVar" value="primary" /> </jsp:include> </div>callee.jsp:
callee.jsp:
<i>method 1: [</i><b><%= request.getParameter("justinVar") %></b><i>]</i> <p/> <i>method 2: [</i><b>${param.justinVar}</b><i>]</i> <p/> <i>method 3: [</i><b>${justinVar}</b><i>]</i> <p/>最终输出:
method 1: [null] method 2: [] method 3: []更新: 以下解决方法可以起作用,这似乎是错误的,但也许它起作用的事实揭示了一些不起作用的地方.
Update: The following workaround does work, it seems wrong, but perhaps the fact that it works reveals something that is not working.
<c:set var="justinVar" value="justinVARisHere" scope="request" /> <jsp:include page="../../../common/callee.jsp" />推荐答案
要确定问题所在,请尝试通过在EL中打印${param}或在Java代码中打印HttpServletRequest#getParameterMap()来调试/探索整个地图.它必须提供有关真正地图包含的内容的见识.
To nail down the problem, try to debug/explore the entire map by printing ${param} in EL or HttpServletRequest#getParameterMap() in Java code. It must give insights about what the map really contains.
更多推荐
为什么jsp:include参数不可见
发布评论