Mapping a servlet to serve my requests

Question

I would like to render a servlet to serve requests that include an "application" and ends in * .html as follows.

<url-pattern>/app/*.html</url-pattern>

but when the application starts, it causes an error

java.lang.IllegalArgumentException: Invalid <url-pattern> 
/app/*.html in servlet mapping

please help me display this. And please provide me with links where I can learn about this rule and URL mapping rules.

Answer 1

This is really wrong. The wildcard must be the first or last character indicating the suffix or prefix, respectively.

<url-pattern>*.html</url-pattern>

or

<url-pattern>/app/*</url-pattern>

All of this is clearly indicated in Section 12.2 Servlet API Specification . Here's an excerpt of relevance:

12.2 Mapping specification

- :

• , ‘/’ ‘/*’, .
• , ‘*.’, .
• ("") - URL, , http://host:port/<contextroot>/. ’/’, ("").
• , ’/’, "" . URI null.
• .

, 2 :

• /app/* HTML /app. .

• , /controller/*, Filter, /app/* doFilter():

  String uri = ((HttpServletRequest) request).getRequestURI();
  if (uri.endsWith(".html")) {
      request.getRequestDispatcher("/controller" + uri).forward(request, response);
  } else {
      chain.doFilter(request, response);
  }
  

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:

• - Java - MVC

Answer 2

? /- ? , , /app .