从Sitemesh Decorator传递一个变量(Pass a variable from Sitemesh Decorator)

从Sitemesh Decorator传递一个变量(Pass a variable from Sitemesh Decorator)

我们有一个系统为不同大小的页面使用多个装饰器，同时使用相同的内容页面。 我试图设置一个可以传递给内容页面（用JSP编写）的变量。 例如

<c:set var="pagetype" value="mobile/" />

此方法不起作用，因为内容页面被发送到装饰器，因此需要首先生成。 有没有一种方法可以在编译之前将一个变量传递到页面中，以便例如我可以在不同装饰器的不同文件夹中使用响应式图像（例如

<img src="uploads/${pagetype}/img.jpg />

We have a system which uses multiple decorators for different sized pages, whilst using the same content pages. I'm trying to set a variable which can be passed to the content pages (which are written in JSP). e.g.

<c:set var="pagetype" value="mobile/" />

This method does not work because the content pages are sent to the decorator and thus need to be generated first. Is there a way to pass a variable into the pages before they are compiled, so that for instance I can use responsive images in different folders with different decorators (e.g.

<img src="uploads/${pagetype}/img.jpg />

最满意答案

解决方案是将其添加到请求范围：

<c:set var="pagetype" value="mobile/" scope="request" />

Solution is to add it to the request scope:

<c:set var="pagetype" value="mobile/" scope="request" />