java - Regex in spring controller

Question

I am trying to build a request filter that will only get used if it matches a pattern of the letter e, then a number. However I cannot seem to get it to work. I keep getting 400 errors every time I try something with regex.

If I just use the following it "works" but also captures mappings that do not have numbers which I don't want.

@RequestMapping(value = "e{number}",
            method = RequestMethod.GET)

I have tried the following combinations.

@RequestMapping(value = "e{number}",
            params = "number:\d+",
            method = RequestMethod.GET)

@RequestMapping(value = "e{number:d+}",
            method = RequestMethod.GET)

@RequestMapping(value = "/e{^\+?\d+$}",
            method = RequestMethod.GET)

@RequestMapping(value = "/{^\e+?\d+$}",
            method = RequestMethod.GET)

Answer 1

According to the documentation, you have to use something like {varName:regex}. There's even an example :

@RequestMapping("/spring-web/{symbolicName:[a-z-]+}-{version:\d\.\d\.\d}{extension:\.[a-z]+}")
  public void handle(@PathVariable String version, @PathVariable String extension) {
    // ...
  }
}