Meaning of "params" in @RequestMapping annotation?

spring spring-mvc request-mapping
CuriousMind picture CuriousMind · Aug 23, 2016 · Viewed 9.4k times · Source

I am aware of @RequestMapping annotation which is used in Spring MVC based application.

I came across this piece of code:

@RequestMapping(method = POST, params = {"someParam"})

I understood the method. However I don't know what params means? Before this I never had seen anything which passed params to this annotation.

Can anyone help in understanding this?

Answer

Codo picture Codo · Aug 23, 2016

Your example means that the parameter someParam must be present in the request. This is used to narrow down the matching methods for the given request.

See the documentation: RequestMapping#params

Related questions

Spring 3 RequestMapping: Get path value

Is there a way to get the complete path value after the requestMapping @PathVariable values have been parsed? That is: /{id}/{restOfTheUrl} should be able to parse /1/dir1/dir2/file.html into id=1 and restOfTheUrl=/dir1/dir2/file.html Any …

Read More
Combine GET and POST request methods in Spring

I have a resource that supports both GET and POST requests. Here a sample code for a sample resource: @RequestMapping(value = "/books", method = RequestMethod.GET) public ModelAndView listBooks(@ModelAttribute("booksFilter") BooksFilter filter, two @RequestParam parameters, HttpServletRequest request) throws ParseException { LONG …

Read More
Spring MVC referencing params variable from RequestMapping

I have the method below: @RequestMapping(value = "/path/to/{iconId}", params="size={iconSize}", method = RequestMethod.GET) public void webletIconData(@PathVariable String iconId, @PathVariable String iconSize, HttpServletResponse response) throws IOException { // Implementation here } I know how to pass the variable "webletId" from …

Read More