Java Play POST [Parameter Missing] error?

Problem is that in order to pass parameters to Java methods through the routes files, these parameters should be part of your endpoint's URL, which should be something similar to POST /api/createMessage/:from/:subject/:message

This is not a good idea for your case, and what you are trying to do (passing the parameters from a json object) is actually the way to go. So what you should do is replace the line in routes file with:

POST    /api/createMessage          controllers.Application.createMessages()

and read the JSON object from withing the createMessages method:

JsonNode data = request().body().asJson();
String from = data.get("from").textValue();
String subject = data.get("subject").textValue();
String message = data.get("message").textValue();

Just make sure you pass the Content-Type: application/json header with your request, so that play understands the request body as a JSON object.

problem is that you are sending data by post in your request

try

GET    /api/createMessage          controllers.Application.createMessages(from:String, subject:String, message:String)

and

Request Method: GET

this problem is because your request adding the params in POST

or, if you want in POST

POST    /api/createMessage          controllers.Application.createMessages

controller

public static Result createMessages{
String form =  //get it
String subject =  //get it
String message =  //get it
//not aware of java syntax too much but get here from form
Message.create(from, subject, message);
return ok(toJson("ok"));
}

as you tag of scala, means you are familar with scala so in scala controller be

def createMessages = Action{
     implicit request =>
    val form = request.body.asFormUrlEncoded.get("form")(0)
    var subject = request.body.asFormUrlEncoded.get("subject")(0)
    var message = request.body.asFormUrlEncoded.get("message")(0)
    Message.create(from, subject, message)
    OK("ok")
}