kotlin json转map

fun getMap(jsonString: String?): HashMap<String, Any> {
    val jsonObject: JSONObject
    try {
        jsonObject = JSONObject(jsonString)
        val keyIter: Iterator<String> = jsonObject.keys()
        var key: String
        var value: Any
        var valueMap = HashMap<String, Any>()
        while (keyIter.hasNext()) {
            key = keyIter.next()
            value = jsonObject[key] as Any
            valueMap[key] = value
        }
        return valueMap
    } catch (e: JSONException) {
        e.printStackTrace()
    }
    return HashMap()
}