post json to spring mvc controller

Question

Controller signature (I have tried as requestbody as well) :

@RequestMapping(value = "/Lame", method = RequestMethod.POST)
public
@ResponseBody
boolean getLame(@RequestParam String strToMatchA, @RequestParam String strToMatchB) {}

And this as my json :

{
"strToMatchA": "EN",
 "strToMatchB": "lon"
}

Not working, I receive the error :

org.springframework.web.bind.MissingServletRequestParameterException: Required String parameter 'strToMatchA' is not present

Removing this first parameter from method signature then makes it work (the method gets called correctly), what should I be doing ?

When I change method parameters to be annotated with @RequestBody I get the following error :

java.io.IOException: Stream closed

Did you compile with debugging enabled? Otherwise, your parameter names will not be available. — David Grant
– David Grant, Commented Oct 12, 2012 at 15:29
@DavidGrant RequestParam will take parameter name defined in method signature. But I have tried whilst manually specify name too — NimChimpsky
– NimChimpsky, Commented Oct 12, 2012 at 15:32
Which library are you using for object-mapping? Is it Jackson or something else? Is it on the classpath? Additionally, the request method for RESTFul controllers should basically be GET instead of POST. — Lion
– Lion, Commented Oct 12, 2012 at 15:34
@Lion jackson, it works for one paramter. Restful api should only use GET you say ? Debatable : stackoverflow.com/q/11522946/106261 — NimChimpsky
– NimChimpsky, Commented Oct 12, 2012 at 15:37

eugen · Accepted Answer · 2012-10-12 16:17:50Z

4

Your json is fine but not the controller signature. Create a class with setters matching the json. Use it as argument instead of your strings. Annotate it with requestbody. It should work.

answered Oct 12, 2012 at 16:17

eugen

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8 Comments

NimChimpsky Over a year ago

is there no other way ? I assumed spring coul dhandle multple request paramters ?

eugen Over a year ago

It can but its not a request parameter what you have is the body of the request

NimChimpsky Over a year ago

I have tried with both annoations. Neither is working. How can I do it using two method paramters ... ?

eugen Over a year ago

What are the both ways? I see only one. Check also that the content type is application/json. You cant, its not supposed toi work that way

NimChimpsky Over a year ago

Annoating method parameters with both requestparam, and requestbody ... OK, so I have to wrap in wrapper bject and change method signature.

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