HarmonyOS 如何把对象转成HasMap

export class CommentItem {
  fCommentObjId: string = '';
  fCreateUserid: string = '';
  fCommentObjOwnerId: string = '';
  fCommentObjType: string = '';
  fContent: string = '';
  fCreateUserNickname: string = '';
  fCreateUserPicture: string = '';
  fPictureContent: string = '';
  source?: string = '0';
}

import { CommentItem } from './CommentItem';
import * as HashMap from 'hashmap';

// 创建一个 CommentItem 实例
let commentItem = new CommentItem();
commentItem.fCommentObjId = '12345';
commentItem.fCreateUserid = 'user1';
commentItem.fCommentObjOwnerId = 'owner1';
commentItem.fCommentObjType = 'typeA';
commentItem.fContent = 'This is a comment';
commentItem.fCreateUserNickname = 'nickname';
commentItem.fCreateUserPicture = 'picture_url';
commentItem.fPictureContent = 'picture_content';
commentItem.source = 'source_value';

// 创建一个 HashMap 实例
let params = new HashMap<string, string>();

// 手动将属性添加到 HashMap
params.set('fCommentObjId', commentItem.fCommentObjId);
params.set('fCreateUserid', commentItem.fCreateUserid);
params.set('fCommentObjOwnerId', commentItem.fCommentObjOwnerId);
params.set('fCommentObjType', commentItem.fCommentObjType);
params.set('fContent', commentItem.fContent);
params.set('fCreateUserNickname', commentItem.fCreateUserNickname);
params.set('fCreateUserPicture', commentItem.fCreateUserPicture);
params.set('fPictureContent', commentItem.fPictureContent);
params.set('source', commentItem.source || '');

// 输出 HashMap 内容
params.forEach((value, key) => {
  console.log(`${key}: ${value}`);
});

function objectToHashMap(obj: any): HashMap<string, string> {
  let hashMap = new HashMap<string, string>();
  
  for (const key in obj) {
    if (obj.hasOwnProperty(key)) {
      let value = obj[key];
      // 如果值是 undefined 或 null，则设为空字符串
      if (value === undefined || value === null) {
        value = '';
      }
      hashMap.set(key, value);
    }
  }
  
  return hashMap;
}

// 创建一个 CommentItem 实例
let commentItem = new CommentItem();
commentItem.fCommentObjId = '12345';
commentItem.fCreateUserid = 'user1';
commentItem.fCommentObjOwnerId = 'owner1';
commentItem.fCommentObjType = 'typeA';
commentItem.fContent = 'This is a comment';
commentItem.fCreateUserNickname = 'nickname';
commentItem.fCreateUserPicture = 'picture_url';
commentItem.fPictureContent = 'picture_content';
commentItem.source = 'source_value';

// 将 CommentItem 对象转换为 HashMap
let params = objectToHashMap(commentItem);

// 输出 HashMap 内容
params.forEach((value, key) => {
  console.log(`${key}: ${value}`);
});

export class CommentItem{ 
 
  fCommentObjId : string = '' 
 
  constructor(fCommentObjId:string) { 
    this.fCommentObjId = fCommentObjId 
  } 
} 
let map = new HashMap<string, object>(); 
let aa = new CommentItem('1111') 
let jsonObj:string = JSON.stringify(aa); 
let jsonObj2:Object = JSON.parse(jsonObj); 
let commObj = (jsonObj2 as Record <string, Object>); 
let valueStr = Object.values(commObj); 
 
let keyStr = Object.keys(commObj); 
 
for (let index = 0; index < valueStr.length; index++) { 
  if(valueStr[index]!=undefined && keyStr[index]!=undefined){ 
    map.set(keyStr[index],valueStr[index]) 
  } 
} 
console.log('fCommentObjId==='+map.get('fCommentObjId'));