将json代码格式化为std::string

#include <iostream>
#include <string>
#include "rapidjson/document.h"
#include "rapidjson/stringbuffer.h"
#include "rapidjson/writer.h"

int main() {
    // 创建一个JSON对象
    rapidjson::Document document;
    document.SetObject();

    // 添加键值对到JSON对象中
    rapidjson::Document::AllocatorType& allocator = document.GetAllocator();
    document.AddMember("name", "John", allocator);
    document.AddMember("age", 30, allocator);
    document.AddMember("city", "New York", allocator);

    // 将JSON对象转换为字符串
    rapidjson::StringBuffer buffer;
    rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);
    document.Accept(writer);

    // 获取格式化后的JSON字符串
    std::string jsonString = buffer.GetString();

    // 打印结果
    std::cout << jsonString << std::endl;

    return 0;
}