【无标题】c++读取json文件

json文件示例：
{“http”:[{

	"1":{
	   "fun_id" : 1,
	   "run_begin_time" : "2022-07-08-15-24-01"
       	},
	
	"2":{
	   "data" : {
	      "0" : 75.77000000000001,
	      "1" : 54.830000000000013,
	      "2" : 58.180000000000007,
	      "3" : 66.030000000000001,
	      "4" : 56.140000000000001,
	      "5" : 64.310000000000002,
	      "6" : 67.730000000000004,
	      "7" : 55.400000000000006,
	      "8" : 60.540000000000006,
	      "9" : 55.850000000000001
	               }
	        },
	        
	"3":{
	   "resultID" : 0,
	   "run_end_time" : "2022-07-08-15-24-04"
	      }

}]
}

c++代码：

//读取json文件

#include “stdafx.h”
#include
#include
#include <json/json.h>
#include
//#include <assert.h>
using namespace std;

void readJson();

int main1()
{
readJson();
system(“pause”);
return 0;
}

void readJson()
{
Json::Reader reader;
Json::Value root;
string jsonPath = “E:\Point_EV_Spatial\res_httpServer\json\cloud_tower_all-2022-07-08-15-24-00.json”;
ifstream is(jsonPath, ios::binary);

if (!is.is_open())
{
	cout << "Error opening" << endl;
	return;
}

	reader.parse(is, root);

	Json::StyledWriter sw;
	cout << sw.write(root);

	int j = root["http"].size();
	cout << root["http"][j - 1]["2"]["data"]["1"].asString();

	int resultID = root["resultID"].asInt();
   
	if (root["s"].type()==Json::nullValue)    //判断json中是否存在s节点
    {
		cout << "不存在的节点"<<endl;
    }
	
	if (resultID == 0)
	{
		string begintime = root["http"][j-1]["1"]["run_begin_time"].asString();
		cout << "开始时间 : " << begintime << endl;
		
		
		const Json::Value arrayobj = root["http"][j - 1]["2"]["data"];

		cout << arrayobj<<endl;       //代表data数据集
		

		//string data = root["http"][j - 1]["2"]["data"][i].asString();

		for (unsigned int i=0; i<arrayobj.size(); i++)
		{
			
			string index =  to_string(i) ; //将int转字符串
			
			cout << arrayobj[index]<<endl; //arrayobj[i]不行，毕竟将i转为字符串
		}
		

	}
	else if(resultID!=0)
	{
		//程序还没运行
		cout << "Error";
	}
	

is.close();

}