一、安装nlohmann json

nlohmann json：安装_nlohmann安装-CSDN博客

依次执行下面指令：

git clone https://gitee.com/cuihongxi/mov_from_github.gitcd json-developmkdir buildcd buildcmake ..makesudo make install

二、安装完成后使用

#include <nlohmann/json.hpp>using json = nlohmann::json;

例程：

// 读取JSON文件std::ifstream file("config.json");if (!file.is_open()) {std::cout << "无法打开JSON文件！" << std::endl;return 1;}// 解析JSON数据json data;try {file >> data;} catch (const json::parse_error& e) {std::cout << "JSON解析错误：" << e.what() << std::endl;return 1;}// 读取JSON中的参数std::string password = data["PASSWORD"];std::string account = data["ACCOUNT"];std::string com_serial = data["COM"];PASSWORD = password.c_str();ACCOUNT = account.c_str();comName = com_serial.c_str();

JSON

{"PASSWORD": "1234","ACCOUNT": "abc","COM": "tty0"
}