C/C++由字串轉JSON/JSON轉字串/數組解析/數組添加

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字串轉成JSON（其中str為字串）

Json::Reader Reader;Json::Value DevJson;Reader.parse(str,DevJson);int dev_id = DevJson["dev_id"].asInt();int index = DevJson["index"].asInt();

　　

JSON轉字串（其中DevStr為字串）

 Json::Value DevJson = DevsJson[i]; std::string DevStr = DevJson.toStyledString(); printf("Msg:%s", DevStr.c_str());

　　

JSON數組解析：

Json::Reader Reader; Json::Value DevsJson; Reader.parse(MsgStr, DevsJson); int siNum = DevsJson.size(); for(int i=0; i < siNum; i++) { Json::Value DevJson = DevsJson[i]; std::string DevStr = DevJson.toStyledString(); printf("Msg:%s", DevStr.c_str()); }

　　

數組添加：

 Json::Value root; Json::Value person; person["name"] = "hello world"; person["age"] = 100; root.append(person);

　　

結果：[{"age":100,"name":"hello world"}]

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// MyTest.cpp : 定義控制台應用程式的進入點。//#include "stdafx.h"#include "iostream"#include "time.h"#include "map"#include <windows.h>#include <sstream>#include <list>#include "json\json.h"  #include "stdint.h"using namespace std;int _tmain(int argc, _TCHAR* argv[]){Json::Value value;uint32_t ssrc1 = 5305490;value["ssrc1"] = ssrc1;uint32_t ssrc2 = 2152748638;value["ssrc2"] = ssrc2;std::string body = value.toStyledString();cout << body << endl;Json::Reader reader;Json::Value data;reader.parse(body, data, false);if (data.isMember("ssrc1")){cout << "ssrc1";if (data["ssrc1"].isInt())cout << " is Int" << endl;if (data["ssrc1"].isUInt())cout << " is UInt" << endl;}if (data.isMember("ssrc2")){cout << "ssrc2";if (data["ssrc2"].isInt())cout << " is Int" << endl;if (data["ssrc2"].isUInt())cout << " is UInt" << endl;}uint32_t ssrc11 = data["ssrc1"].asUInt();uint32_t ssrc21 = data["ssrc2"].asUInt();cout << "ssrc11:" << ssrc11 << endl;cout << "ssrc21:" << ssrc21 << endl;system("pause");return 0;}

輸出結果：

 

C/C++由字串轉JSON/JSON轉字串/數組解析/數組添加