How to convert String into JsValue in Play Framework

Question

Is it possible at all to convert a String to a JsValue? And how would I do so? I've been trying .asInstanceOf[JsValue] but that doesn't appear to be working

I get the following error:

[ClassCastException: java.lang.String cannot be cast to play.api.libs.json.JsValue]

Any ideas?

Answer 1

if the string is a representation of a json object, eg:

val jsonString: String = """{"key": "value"}"""

then it can be converted to a value of type JsValue

val jsonObject: JsValue = Json.parse(jsonString)

and you can access the values in the json with path operator

println(jsonObject \ "key")

Answer 2

A way to construct JsValue from String is to use the play.api.libs.json.JsString case class.

Namely, JsString("abc") can be used wherever the JsValue representation of "abc" is needed.