java - json ファイルに属性を追加する方法

Question

javaでJSONObjectを使ってjsonファイルを生成しています。私が得る出力は次のようなものです:

{"entities": [
  {
  "comments": "Yoyo",
  "contractor": "true",
  "createdBy": "Moc Naaocb",
  "dateOfBirth": "191029683619",
  "department": "qa",
  "email": "Idpxtt.Qxeisa@hp.com",
  "employmentDate": "803891270878",
  "expertise": "javaMaster",
  "firstName": "Idpxtt",
  "gender": "male",
  "imageUrl": "",
  "lastName": "Qxeisa",
  "level": "expert",
  "location": "israel",
  "manager": "Iex",
  "percentageOfTime": "12",
  "periodOfService": "74",
  "role": "ux",
  "team": "platformUI"
 }]}

私が実際に必要としているのは、生成されたフィールドの前に追加のデータ (属性) を追加することです。データは定数です...次のようになります。

{"entities":[{"entity_type":"employee","lastUpdateTime":0,"properties":{
    "comments": "BlaBlaBla",
    "contractor": "false",
    "createdBy": "Zhsraz Olgaaoqi",
    "dateOfBirth": "101994924814",
    "department": "saas",
    "email": "Ogz.Pqqoaeo@hp.com",
    "employmentDate": "1141914797543",
    "expertise": "javaScriptNinja",
    "firstName": "Ogz",
    "gender": "male",
    "imageUrl": "",
    "lastName": "Pqqoaeo",
    "level": "softwareEngineer",
    "location": "usa",
    "manager": "Jiso",
    "percentageOfTime": "28",
    "periodOfService": "3",
    "role": "systemArchitect",
    "team": "ux"
}]}

どんな助けでも大歓迎です...ありがとう！

json作成のコード

JSONObject json = new JSONObject();


        List<Employee> list = new ArrayList<Employee>();
        for(int i=0; i<2; i++) {
            Employee emp = new Employee();
            list.add(emp);
        }

        int print = 1;
        json.accumulate("entities",list);
        System.out.println(json.toString(print));