java - How does Spring MVC convert @RequestParam values? -

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i'm new spring framework, , symptom, want keep adoption of web mvc portions simple possible, i'm using annotation functions work spring. in past, i've used:
int value = integer.valueof(request.getparameter("numbervalue"))
to pull values parameters - explicitly converting string returned getparameter().
helpfully, i've noticed when use spring's terminology:
@requestparameter("numbervalue") int numval
conversion handled automatically. nice, "black box" me. tried looking @ questions on here or in spring documentation, information deals custom conversions (like converter) objects or formatting issues. want know how spring handles primitive type conversions @requestparam default.

i've noticed when use spring's terminology: @requestparameter("numbervalue") int numval conversion handled automatically.

here looking type conversion

as per spring documentation given on link

string-based values extracted request including request parameters, path variables, request headers, , cookie values may need converted target type of method parameter or field (e.g., binding request parameter field in @modelattribute parameter) they’re bound to. if target type not string, spring automatically converts appropriate type. simple types such int, long, date, etc. supported.


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