can POST parameters be sent using Content Type application/json?

Question

As far as I understand, POST parameters can be sent using Content-Type only either multipart/form-data or x-www-form-urlencoded. Is that right? I want to send the parameters wrapped in JSON. Is that possible? Will the parameters in the request

POST /login HTTP/1.1
Host: localhost:8080
Content-Type: application/json

{"username": "test","password": "test"}

be identified as username=test&password=test?