Consume API in Grails

Add plugin in dependency plugin : compile "org.grails.plugins:rest-client-builder:2.1.1"
def sms(){
        def rest = new RestBuilder()
        MultiValueMap<String, String> form = new LinkedMultiValueMap<String, String>()
        form.add("UserID", "****")
        form.add("Passwor", "******")
        form.add("stuID", "*******")
        def resp = rest.post("http://localhost:8087/bankapi/student/CheckId") {
            accept JSONObject, 'application/json'
            contentType("application/x-www-form-urlencoded")
            body(form)
        }
       def json = resp.json
       System.out.println(json)
    }