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Posted: **Thu Oct 09, 2014 12:37 pm**

Pardon my ignorance if this is thick, I am just starting my studies for this test.

It is stated on one of explanations that "You cannot start an extension mapping with a /."

However Appendix A of the JSP 2.0 spec, on "JSP.A.4 The Web Application Descriptor" provides an example:

Code: Select all

<servlet-mapping>
  <servlet-name> HelloWorld </servlet-name> 
  <url-pattern> /HelloWorld.jsp </url-pattern>
</servlet-mapping>

Is this a different case because it is a jsp or can we start with a "/"?

PS: My spec file is named jsp-2_0-fr-spec.pdf, "JavaServer PagesTM Specification Version 2.0". On this file the example above can be found on page 390 of 478.

Posted: **Thu Oct 09, 2014 8:17 pm**

/HelloWorld.jsp is not an extension mapping. It is an exact mapping.
As per section SRV 11.2 of Servlet 2.4 specification:

SRV.11.2 Specification of Mappings
In the Web application deployment descriptor, the following syntax is used to define
mappings:
• A string beginning with a ‘/’ character and ending with a ‘/*’ suffix is used
for path mapping.
• A string beginning with a ‘*.’ prefix is used as an extension mapping.
• A string containing only the ’/’ character indicates the "default" servlet of
the application. In this case the servlet path is the request URI minus the context
path and the path info is null.
• All other strings are used for exact matches only.

Posted: **Fri Oct 10, 2014 10:37 am**

Thanks, it makes sense now.

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