I have the servlet annotation as:
@WebServlet (name="PageServlet", urlPatterns={"*.zt"})
zt is the file extension I am using.
However if I use
@WebServlet (name="PageServlet", urlPatterns={"/*.zt"})
It does not match the URL such as /app/index.zt , nor /app/foo/test.zt... How can I match only the zt files under root /app/?
The servlet container either uses path mapping or extension mapping. You cannot use a combination of the two. See ¶12.2 of the Servlet Specification:
- 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.
- The empty string ("") is a special URL pattern that exactly maps to the application's context root, i.e., requests of the form
http://host:port/<context- root>/. In this case the path info is ’/’ and the servlet path and context path is empty string (““).- 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.
In your code * is not treated as wild-card, you have to use /app/*
Example 1 : /string1/*/string2 , * will work as wild-card
@WebServlet(
urlPatterns={"/string1/*/string2"} ,
name="ServletName",
initParams={ @WebInitParam(name = "name", value = "string2")
} )
Example 2 :
@WebServlet(
urlPatterns={"/string1/*"} ,
name="ServletName"
)
