Can't map regular expression - java.lang.IllegalArgumentException: The number of capturing groups in the pattern segment

Question

I have the following method defined in my controller:

@RequestMapping(value = \"/ajax/comments/post/{contentId:([apv]|ad)\\\\d+}\")
    public @ResponseBody
         


        

Answer 1

Everything is said in the error message: use non-capturing groups instead

(?:[apv]|ad)\\d+

See http://www.regular-expressions.info/brackets.html for further details.