有关JSP包含指令和JSP包含标签的内容 [英] Something about JSP include directive and JSP include tag

问题描述

在JSP Spec 2.1中，我找到了一个有关JSP include指令和JSP include标签的示例:

In the JSP Spec 2.1, I found an example about the JSP include directive and JSP include tag:

有关一组更复杂的包含的示例，请考虑以下内容 使用四个JSP文件构建的四种情况:A.jsp，C.jsp，dir/B.jsp和dir/C.jsp:

For an example of a more complex set of inclusions, consider the following four situations built using four JSP files: A.jsp, C.jsp, dir/B.jsp and dir/C.jsp :

我不太了解这一点，尤其是第一个和最后一个情况，为什么在第一种情况下C.jsp不能解析为C.jsp?为什么在最后一种情况下c.jsp不能解析为dir/c.jsp?

I don't quite understand this, especially the first and last situation, why the C.jsp are not resolved to C.jsp in the first situation? and why the c.jsp are not resolved to dir/c.jsp in the last situation?

推荐答案

include指令

使用此伪指令来指定资源，该资源包含在翻译时要插入JSP页面的文本或代码.

include directive

Use this directive to specify a resource that contains text or code to be inserted into the JSP page when it is translated.

例如:

<%@ include file="/jsp/userinfopage.jsp" %>

指定资源的相对页面或相对于上下文的路径.

Specify either a page-relative or context-relative path to the resource.

请参见请求JSP页面用于讨论页面相对路径和上下文相对路径.

See Requesting a JSP Page for discussion of page-relative and context-relative paths.

• include指令(称为静态include)在本质上与本章稍后讨论的jsp:include操作具有可比性，但是jsp:include在请求时而不是转换时生效.请参见静态包含与动态包含 .

• The include directive, referred to as a static include, is comparable in nature to the jsp:include action discussed later in this chapter, but jsp:include takes effect at request-time instead of translation-time. See Static Includes Versus Dynamic Includes.

include指令只能在同一servlet上下文(应用程序)中的文件之间使用.

The include directive can be used only between files in the same servlet context (application).

在JSP包含指令中，路径可以相对于包含页面或绝对路径(然后它必须以/开头，并且属于Web应用程序根目录).

In a JSP include directive the path can be relative to the including page or absolute (then it has to start with a / and belongs to the web application root directory).

有关更多信息，请参见此处

For more info have a look at another post here

请查看在JSP页面中包含内容

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