Question

So I have a Map in Scala like this:

val m = Map[String, String](
    "a" -> "theA",
    "b" -> "theB",
    "c" -> "theC",
    "d" -> "theD",
    "e" -> "theE"
)

and I want to serialize this structure into a JSON string using lift-json.

Do any of you know how to do this?

Answer 1

How about this?

implicit val formats = net.liftweb.json.DefaultFormats
import net.liftweb.json.JsonAST._
import net.liftweb.json.Extraction._
import net.liftweb.json.Printer._
val m = Map[String, String](
    "a" -> "theA",
    "b" -> "theB",
    "c" -> "theC",
    "d" -> "theD",
    "e" -> "theE"
)
println(compact(render(decompose(m))))

output:

{"e":"theE","a":"theA","b":"theB","c":"theC","d":"theD"}

EDIT:

For a scala.collections.mutable.Map, you should convert it first to an immutable map: .toMap