Java / Scala lib将点符号解析为Json字符串

Question

I wanna parse some dot-notation map to a json string, for example I have:

input["top.second.third0"] = 0
input["top.second.third1"] = "hello"

And then I want to get the following json string from this map :

{"top":{
     "second":{
         "third0":0,
         "third1":"hello"
        }
   }
}

I know how to generate it by using split, I am asking if there is a Java/Scala library that can do that for me?

Answer 1

For Play JSON, you can parse such expression to JsPath and then use it.

import play.api.libs.json._

val components = input.split("\\.")

components.headOption match {
  case Some(p) => components.tail.foldLeft(JsPath \ p) { _ \ _ }
  case _ => /* cannot parse */ ???
}

Answer 2

I do something like this to finish this task.

  val input = "a.b.c"
  val components = input.split("\\.")

  val jsPath = components.headOption match {
    case Some(p) => components.tail.foldLeft(JsPath \ p) { _ \ _ }
    case _ => /* cannot parse */ ???
  }
  val obj = JsPath.createObj(jsPath -> JsString("Hello"))
  Logger.debug("after write" + obj.toString)

I don't know why but seems everybody is using play if you use scala.