HarmonyOS Json字符串与Map集合对象如何互转？

// Map转Json字符串代码如下： 
const map = new Map([ 
  ['name', '张三'], 
  ['age', '18'], 
  ['address', 'xian'], 
]); 
 
let jsonObject:Record<string,Object> = {} 
map.forEach((value,key) => { 
  if (key != undefined && value != undefined) { 
    jsonObject[key] = value; 
  } 
}) 
let info:string = JSON.stringify(jsonObject); 
 
// Json字符串转Map 
let strParam = '{"main": {"num": 1,"aaa": 2},"ks":"sadadas","sc":11111,"update":"asdasdasda"}'; 
let obj: object = JSON.parse(strParam); 
let targetMap: Map<string, object> = new Map<string, object>(Object.entries(obj));
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