How DefaultAnnotationHandlerMapping works

Question

I am confused about the way the DefaultAnnotationHandlerMapping works.

In my web.xml I have

 
    spring&l         


        

Answer 1

Spring will match against the pathInfo property of the HttpServletRequest.

If your web.xml specifies <url-pattern>/user/*</url-pattern>, then the pathInfo will be the path with the /user prefix removed, so the @RequestMapping has to be /adduser.

If web.xml specifies <url-pattern>/user/adduser</url-pattern>, then the pathInfo will be the full /user/adduser path, so @RequestMapping has to match against that.

This isn't done by Spring, but by the servlet container, and it can be a bit confusing at times.

You can mitigate against this by using wildcards in @RequestMapping, e.g.

@RequestMapping(value="**/adduser", method={RequestMethod.POST})