How to convert Scala Map into JSON String?

Question

For example, I have this Map value in Scala:

val m = Map(
    \"name\" -> \"john doe\", 
    \"age\" -> 18, 
    \"hasChild\" -> true, 
    \"childs\" -         


        

Answer 1

In case somebody is looking for a solution using standard libraries.

def toJson(query: Any): String = query match {
  case m: Map[String, Any] => s"{${m.map(toJson(_)).mkString(",")}}"
  case t: (String, Any) => s""""${t._1}":${toJson(t._2)}"""
  case ss: Seq[Any] => s"""[${ss.map(toJson(_)).mkString(",")}]"""
  case s: String => s""""$s""""
  case null => "null"
  case _ => query.toString
}