C++ 基于rapidjson对json字符串的进行序列化与反序列化

￡神魔★判官ぃ 2021-10-19 20:48 395阅读 0赞

json字符串的解析以封装在我们开发过程中经常见到, 尤其在socket通信上面, 在一次项目中碰到json字符串的进行解析, 而公司有没有封装好的库, 于是就自己基于开源的库进行了一次封装, 接下是使用案例, 如果感觉可以, 就去下载我的源代码自己编译一个库出来(能直接编译通过, 无任何依赖),

下载地址: [https://download.csdn.net/download/weixin\_41370313/11457996][https_download.csdn.net_download_weixin_41370313_11457996]

jsonObjDefine.h

#pragma once
    #include "../LibJosnSerial/JsonBase.h"
    #include <string>
    using namespace JsonBaseHelper;
    using namespace std;
    class Person : public JsonBase
    {
    public:
    	string name;
    	string sex;
    	int age;
    	int ident;
    	void ToWrite(Writer<StringBuffer> &writer)
    	{
    		RapidjsonWriteBegin(writer);
    		RapidjsonWriteString(name);
    		RapidjsonWriteString(sex);
    		RapidjsonWriteInt(age);
    		RapidjsonWriteInt(ident);
    		RapidjsonWriteEnd();
    	}
    	void ParseJson(const Value& val)
    	{
    		RapidjsonParseBegin(val);
    		RapidjsonParseToString(name);
    		RapidjsonParseToString(sex);
    		RapidjsonParseToInt(age);
    		RapidjsonParseToInt(ident);
    		RapidjsonParseEnd();
    	}
    };
    
    class MacPropery : public JsonBase
    {
    public:
    	int count;
    	float perMachine;
    	int machineCount;
    	string operationTime;
    	void ToWrite(Writer<StringBuffer> &writer)
    	{
    		RapidjsonWriteBegin(writer);
    		RapidjsonWriteInt(count);
    		RapidjsonWriteDouble(perMachine);
    		RapidjsonWriteInt(machineCount);
    		RapidjsonWriteString(operationTime);
    		RapidjsonWriteEnd();
    	};
    	void ParseJson(const Value& val)
    	{
    		RapidjsonParseBegin(val);
    		RapidjsonParseToInt(count);
    		RapidjsonParseToDouble(perMachine);
    		RapidjsonParseToInt(machineCount);
    		RapidjsonParseToString(operationTime);
    		RapidjsonParseEnd();
    	};
    };
    
    class PrintMacInfo : public JsonBase
    {
    public:
    	int code;
    	string message;
    	JsonArray<MacPropery> data;
    	void ToWrite(Writer<StringBuffer> &writer)
    	{
    		RapidjsonWriteBegin(writer);
    		RapidjsonWriteInt(code);
    		RapidjsonWriteString(message);
    		RapidjsonWriteClass(data);
    		RapidjsonWriteEnd();
    	};
    	void ParseJson(const Value& val)
    	{
    		RapidjsonParseBegin(val);
    		RapidjsonParseToInt(code);
    		RapidjsonParseToString(message);
    		RapidjsonParseToClass(data);
    		RapidjsonParseEnd();
    	};
    };

测试demo

#include <iostream>
    #include "JsonObjDefine.h" //定义json对象头文件
    #include <iostream>
    //基于rapidjson封装的库
    #pragma comment(lib, "..\\LibJosnSerial\\Bin\\LibJosnSerial.lib")
    int main()
    {
        std::cout << "基础json字符串转换\n"; 
    	Person per;
    	per.age = 99;
    	per.ident = 123;
    	per.name = "测试";
    	per.sex = "男性";
    	string strPerJson = JsonBase::SerializeJson(&per);
    	std::cout << "Person -> Json字符串:" << std::endl << strPerJson << std::endl;
    	std::cout << endl;
    	std::cout << "Json字符串 -> Person" << std::endl;
    	Person perRet;
    	JsonBase::DeserializeJson(&perRet, strPerJson);
    	cout << "age: " << perRet.age << endl;
    	cout << "ident: " << perRet.ident << endl;
    	cout << "name: " << perRet.name << endl;
    	cout << "sex: " << perRet.sex << endl;
    	std::cout << endl;
    
    	std::cout << "有嵌套json字符串转换\n";
    	PrintMacInfo printMac;
    	printMac.code = 0;
    	printMac.message = "测试json字符串";
    	MacPropery mac_1;
    	mac_1.count = 6031;
    	mac_1.perMachine = 861.57;
    	mac_1.machineCount = 7;
    	mac_1.operationTime = "2012";
    	printMac.data.objList.push_back(mac_1);
    	MacPropery mac_2;
    	mac_2.count = 20754;
    	mac_2.perMachine = 2964.86;
    	mac_2.machineCount = 7;
    	mac_2.operationTime = "2018";
    	printMac.data.objList.push_back(mac_2);
    	string strJson = JsonBase::SerializeJson(&printMac);
    	std::cout << "PrintMacInfo -> Json字符串:"<< std::endl << strJson<<std::endl;
    	std::cout << endl;
    	std::cout << "Json字符串 -> PrintMacInfo" << endl;
    	PrintMacInfo printMacRet;
    	JsonBase::DeserializeJson(&printMacRet, strJson);
    	cout << "code:"<< printMacRet.code << endl;
    	cout << "message" << printMacRet.message << endl;
    	int index = 1;
    	for each(auto it in printMacRet.data.objList)
    	{
    		cout << "data_MacPro_"<<index<<": "<< it.count << endl;
    		cout << "data_MacPro_"<<index<<": "<< it.machineCount << endl;
    		cout << "data_MacPro_"<<index<<": "<< it.perMachine << endl;
    		cout << "data_MacPro_"<<index<<": "<< it.operationTime << endl;
    		cout << endl;
    		index++;
    	}
    	getchar();
    }

打印输出:

![1039287-20190731175001366-1297987941.png][]

普通字符串格式

\{  
"name": "测试",  
"sex": "男性",  
"age": 99,  
"ident": 123  
\}

有嵌套json字符串格式

\{  
"code": 0,  
"message": "测试json字符串",  
"data": \[\{  
"count": 6031,  
"perMachine": 861.5700073242188,  
"machineCount": 7,  
"operationTime ": "2012 "  
\},  
\{  
"count ": 20754,  
"perMachine ": 2964.860107421875,  
"machineCount ": 7,  
"operationTime ": "2018 "  
\}  
\]  
\}

转载于:https://www.cnblogs.com/hul201610101100/p/11278105.html

[https_download.csdn.net_download_weixin_41370313_11457996]: https://download.csdn.net/download/weixin_41370313/11457996
[1039287-20190731175001366-1297987941.png]: /images/20211019/1ac5c9b1213d4ceb991e3d3c11205403.png