我如何才能像kotlin那样以一种简单而富有表现力的方式访问深度嵌套且不可靠的json值呢？

{
  "user": {
    "name": "John Doe",
    "age": 30,
    "address": {
      "city": "New York",
      "zipcode": "10001"
    }
  }
}

data class Address(val city: String, val zipcode: String)
data class User(val name: String, val age: Int, val address: Address)
data class Root(val user: User)

import org.json.JSONObject

fun JSONObject.toUser(): User? {
    return try {
        val userJson = this.getJSONObject("user")
        val addressJson = userJson.getJSONObject("address")
        val user = User(
            name = userJson.getString("name"),
            age = userJson.getInt("age"),
            address = Address(
                city = addressJson.getString("city"),
                zipcode = addressJson.getString("zipcode")
            )
        )
        user
    } catch (e: Exception) {
        null
    }
}

val jsonString = """{"user":{"name":"John Doe","age":30,"address":{"city":"New York","zipcode":"10001"}}}"""
val jsonObject = JSONObject(jsonString)
val user = jsonObject.toUser()
println(user)