我使用j2ee和activiti-rest来创建此函数以获取流程实例变量的列表

Question

您好，我使用j2ee和activiti-rest来创建此函数来获取流程实例的变量列表，该函数将所有信息返回给我，但我希望我不需要任何其他变量列表信息，我如何访问钩子之间的变量信息，我想以粗体显示信息

这是代码：

public List<HistoricVariableInstance> ListVariableOfCompletedInstance() 
 throws 
   JSONException, IOException {
   JSONArray VariablesArray = 
   ProcessController.getService("/history/historic-variable-instances? 
   processInstanceId="+idInstance);




  try {
   Gson gson = new Gson();

  List<HistoricVariableInstance> listVariableOfinsatance = 
  gson.fromJson(VariablesArray.toString(), List.class);
  System.out.println(listVariableOfinsatance.size());



  System.out.println("la liste des variables:" +listVariableOfinsatance);
  return listVariableOfinsatance;


  } catch (Exception e) {
  }
 return null;
}











   the response :

      {
     "data": [
         {
        "id": "40406",
         "processInstanceId": "40398",
          "processInstanceUrl": "http://10.6.99.57:8888/activiti- 
            rest/service/history/historic-process-instances/40398",
         "taskId": null,
          "variable": {
          "name": "nbj",
           "type": "string",
          "value": "3",
         "scope": null
          }
            },
         {
            "id": "40408",
       "processInstanceId": "40398",
         "processInstanceUrl": "http://10.6.99.57:8888/activiti- 
        rest/service/history/historic-process-instances/40398",
       "taskId": null,
        "variable": {
         "name": "nom",
          "type": "string",
          "value": "yasmine",
           "scope": null
                 }
                      },
                {
             "id": "40404",
              "processInstanceId": "40398",
                "processInstanceUrl": "http://10.6.99.57:8888/activiti- 
                 rest/service/history/historic-process-instances/40398",
                 "taskId": null,
                 "variable": {
                   "name": "reponse",
                 "type": "string",
                 "value": "1",
                "scope": null
                  }
                    }
                          ],