namespace ns { template<class T> void to_string(const T &data, std::string &content) { json j; to_json(j, data); content = j.dump(); } template<class T> void from_string(const std::string &content, T &data) { try { json j = json::parse(content); from_json(j, data); ...
json j ="{"happy":true,"pi":3.141}"_json; auto j2 =R"({"happy":true,"pi":3.141})"_json; // 或者 std::string s ="{"happy":true,"pi":3.141}"; auto j = json::parse(s.toStdString().c_str()); std::cout << j.at("pi") << std::endl; // 输出:3.141 序列化:从 ...
#include<iostream>#include"uri/uri.hh"#include"nlohmann/json.hpp"intmain(){nlohmann::json j;uri u="http://baidu.com";// 保存到jsonj["uri"]=u;// 从json中读取uri对象uri u2=j["uri"].get<uri>();std::cout<<"u2:"<<u2.to_string()<<std::endl;} 实际上直接这样写是不行的,因为...
use json construct std::string#1462 Closed ghutchisadded a commit to ghutchis/avogadrolibs that referenced this issueApr 18, 2020 Fix MSVC errors with ambiguous assignment cd5a7f0 Sign up for freeto join this conversation on GitHub. Already have an account?Sign in to comment...
一是:#include <nlohmann/json.hpp>头文件路径的引入,这里将json.hpp文件放到linux系统中的/usr/local/include路径下,这是系统默认头文件路径,在编译时系统会自动查找该路径。我们在/usr/local/include路径下创建/nlohmann/json.hpp,如下图所示: 二是:在编译时需要指定c++11标准,-std=c++11。
#include "rapidjson/writer.h" #include "rapidjson/stringbuffer.h" // 假设有一个类如下 class MyClass { public: int id; std::string name; // 序列化为JSON对象 rapidjson::Value toJSON(rapidjson::Document::AllocatorType& allocator) const { rapidjson::Value json(rapidjson::kObjectType); json....
nlohmann使用c++11的新功能,更多的c++方法,使用起来更方便。并且nlohmann在调试的时候,可以看到数据结构,这个太有用了,而jsoncpp,只能通过内部的方法导出string。 由于各种原因把jsoncpp切换到nlohmann,在nlohmann使用时有一些需要注意的。不过大部分注意事项作者已经写到github上了https://github.com/nlohmann/json ...
// 将 JSON 对象写入文件 std::ofstream file("data.json"); if (file.is_open()) { file << std::setw(4) << data << std::endl; file.close(); std::cout << "JSON data has been written to file." << std::endl; } else { ...
{"addDev":{"key":"1"} }// 旧的json { "addName:{ "str":"str" } } // 新的json, struct addName { string str; // 结构体 } 想要的json { "addDev":{ "key":"1", "addName:{ "str":"str" } } } // 或者 { "addDev":{ "key":"1" }, "addName:{ "str":"str" }...
wstring val = json["Name"]; ? The problem I am facing is that MSVC does not use UTF8 strings in std::string, and even something as simple as French accented letters turn into gibberish. I know I can convert json["Name"] TO wstring, but the issue would remain :( ...