如何在ArkTS中实现JSON和Map的转换？

let map: Map<string, ESObject> = new Map<string, ESObject>() 
for(let i=0;i<10;i++){ 
  let key:string = i.toString() 
  let val:string = "test:" + i.toString() 
  map.set(key,val) 
} 
let arr: Array<string> = new Array<string>(10) 
for(let i=0;i<10;i++){ 
  let val:string = "test:" + i.toString() 
  arr[i] = val 
} 
map.set("arr",arr)

// 递归，以防value也是Map 
function  Map2Rec(map:Map<string, ESObject>):Record<string,ESObject>{ 
  let Rec:Record<string,ESObject> = {}; 
  map.forEach((value:ESObject, key:string) => { 
    if(value instanceof Map){ 
      let vRec:Record<string,ESObject> = Map2Rec(value); 
      value = vRec 
    } 
    Rec[key] = value 
  }) 
  return Rec 
} 
  
  
let myRec:Record<string,ESObject> = Map2Rec(map) 
let str:string = JSON.stringify(myRec) 
console.info(str)

// ts 
export class ObjectUtil { 
  static ObjectFromEntries(source: Iterable<readonly any[]>): Object { 
    return Object.fromEntries(source) 
  } 
} 
  
//ets 
let str:string = JSON.stringify(ObjectUtil.ObjectFromEntries(map)) 
console.info(str)