Serialize to Json using jackson ObjectMapper

object Json {
  val mapper = new ObjectMapper() with ScalaObjectMapper
  mapper.enable(SerializationFeature.INDENT_OUTPUT)
  mapper.registerModule(DefaultScalaModule)

  implicit class JsonOps[T](obj : T) extends scala.AnyRef {
    def toJson: String = mapper.writeValueAsString(obj)
  }
}

case class Person(name: String, age: Int)

object Example {
  import Json._

  def run = {
    val x = Person("Frol", 123).toJson
    println(x) // outputs {"name":"Frol","age":123}
  }
}