HarmonyOS JSON怎么转Map？

let jsonRecord:Record<string,Object> = JSON.parse('{ "0": {"num": 1}, "1": {"num": 2} }') as Record<string,Object>; 
let map:Map<string,Object> = new Map(); 
Object.keys(jsonRecord).forEach((key) => { 
  console.log(key + ': ' + jsonRecord[key]); 
  map.set(key,jsonRecord[key]); 
});