腾讯rapidJson使用例子

 只需要把库的头文件拿下来加入项目中使用就行，我是以二进制文件存储内容并解析：

#include <iostream>
#include <fstream>
#include <string>
#include "rapidjson/document.h"
#include "rapidjson/error/en.h"
#include "rapidjson/error/en.h"void writeJsonToBinaryFile(const std::string& jsonString, const std::string& filename) {std::ofstream outFile(filename, std::ios::binary);if (!outFile) {std::cerr << "无法打开文件进行写入: " << filename << std::endl;return;}// 将 JSON 字符串写入文件outFile.write(jsonString.c_str(), jsonString.size());outFile.close();
}std::string readBinaryFileToJsonString(const std::string& filename) {std::ifstream inFile(filename, std::ios::binary);if (!inFile) {std::cerr << "无法打开文件进行读取: " << filename << std::endl;return "";}// 读取文件内容到字符串std::string jsonString((std::istreambuf_iterator<char>(inFile)), std::istreambuf_iterator<char>());inFile.close();return jsonString;
}int main() {// 创建 JSON 字符串rapidjson::Document document;document.SetObject();rapidjson::Document::AllocatorType& allocator = document.GetAllocator();document.AddMember("name", rapidjson::Value("John", allocator), allocator);document.AddMember("age", 30, allocator);document.AddMember("isStudent", false, allocator);// 将 JSON 对象转换为字符串rapidjson::StringBuffer buffer;rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);document.Accept(writer);std::string jsonString = buffer.GetString();// 写入二进制文件writeJsonToBinaryFile(jsonString, "data.bin");// 从二进制文件读取 JSON 字符串std::string jsonString = readBinaryFileToJsonString("data.bin");if (jsonString.empty()) {return 1; // 读取失败}// 解析 JSON 字符串rapidjson::Document document2;if (document2.Parse(jsonString.c_str()).HasParseError()) {std::cerr << "JSON 解析错误: " << rapidjson::GetParseError_En(document2.GetParseError()) << std::endl;return 1;}// 访问 JSON 数据const char* name = document2["name"].GetString();int age = document2["age"].GetInt();bool isStudent = document2["isStudent"].GetBool();// 输出解析结果std::cout << "Name: " << name << std::endl;std::cout << "Age: " << age << std::endl;std::cout << "Is Student: " << (isStudent ? "true" : "false") << std::endl;return 0;
}