java pageContext.request.contextPath 不起作用
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pageContext.request.contextPath not working
提问by arturopuente
I'm using Tomcat 6.0.32 and I'm trying to include a JSP file into another, but somehow the file cannot be found (yes, the file exists). Here is the file structure and code:
我正在使用 Tomcat 6.0.32 并且我试图将一个 JSP 文件包含到另一个文件中，但不知何故无法找到该文件（是的，该文件存在）。这是文件结构和代码：
<jsp:include page="${pageContext.request.contextPath}/templates/header.jsp">
</jsp:include>
WebContent
- folder/caller.jsp
- templates/header.jsp
However, if I use ${pageContext.request.contextPath} outside of that to check if it outputs correctly, it works, does anyone know why this is happening?
但是，如果我在此之外使用 ${pageContext.request.contextPath} 来检查它是否正确输出，它可以工作，有人知道为什么会这样吗？
回答by matt b
I'm not even sure if you can use runtime variables inside a <jsp:include>, but the other problem is that the contextPathrefersto the context of the URL being requested from the server, and does not necessarily correspond to your filesystem layout.
我什至不确定您是否可以在 a 中使用运行时变量<jsp:include>，但另一个问题是thecontextPath指的是从服务器请求的 URL 的上下文，并且不一定对应于您的文件系统布局。
Why wouldn't you just use <jsp:include page="templates/header.jsp">?
你为什么不直接使用<jsp:include page="templates/header.jsp">？
回答by pradks
i completely agree with the above answer however if u have to use it this way then the below code shd work
我完全同意上面的答案，但是如果你必须这样使用它，那么下面的代码 shd 工作
<c:set var="myContext" value="${pageContext.request.contextPath}"/>
<jsp:include page="${myContext}/templates/header.jsp"> </jsp:include>
