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I'm editing a web project that uses Spring and I need to adding some of Spring's annotations. Two of the ones I'm adding are @RequestBody and @RequestParam. I've been poking around a little and found this, but I still don't completely understand how to use these annotations. Could anyone provide an example?
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nothing. So it fails with 400 because the request can't be correctly handled by the handler method.
So basically, while @RequestBody maps entire user request (even for POST) to a String variable, @RequestParam does so with one (or more - but it is more complicated) request param to your method argument.
@ModelAttribute is used for binding data from request param (in key value pairs), but @RequestBody is used for binding data from whole body of the request like POST,PUT.. request types which contains other format like json, xml.
By using @RequestBody annotation you will get your values mapped with the model you created in your system for handling any specific call. While by using @ResponseBody you can send anything back to the place from where the request was generated. Both things will be mapped easily without writing any custom parser etc.
Controller example:
@Controller
class FooController {
@RequestMapping("...")
void bar(@RequestBody String body, @RequestParam("baz") baz) {
//method body
}
}
@RequestBody: variable body will contain the body of the HTTP request
@RequestParam: variable baz will hold the value of request parameter baz
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