boost解析json文件

最新推荐文章于 2024-11-08 08:20:39 发布

xiamentingtao

最新推荐文章于 2024-11-08 08:20:39 发布

阅读量3.9k

点赞数

分类专栏：常用工具文章标签： json

常用工具专栏收录该内容

29 篇文章

订阅专栏

本文介绍如何利用Boost库中的property_tree模块来创建并解析JSON文件。通过具体的代码示例展示了如何构建JSON数据结构，将其写入文件，并从文件中读取数据进行解析。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

#include <boost/property_tree/ptree.hpp>  
#include <boost/property_tree/json_parser.hpp>  
#include <string>
#include <iostream>
using namespace std;
const std::string file_path = "./test.txt";
void generate_user()
{
    boost::property_tree::ptree root;
    boost::property_tree::ptree items;

    boost::property_tree::ptree item1;
    item1.put("ID", "1");
    item1.put("Name", "wang");
    items.push_back(std::make_pair("1", item1));




    boost::property_tree::ptree item2;
    item2.put("ID", "2");
    item2.put("Name", "zhang");
    items.push_back(std::make_pair("2", item2));


    boost::property_tree::ptree item3;
    item3.put("ID", "3");
    item3.put("Name", "li");
    items.push_back(std::make_pair("3", item3));


    root.put_child("user", items);
    boost::property_tree::write_json(file_path, root);
}
void read_user()
{


    boost::property_tree::ptree root;
    boost::property_tree::ptree items;
    boost::property_tree::read_json<boost::property_tree::ptree>(file_path, root);


    items = root.get_child("user");
    for (boost::property_tree::ptree::iterator it = items.begin(); it != items.end(); ++it)
    {
        //遍历读出数据  
        string key = it->first;//key ID  
        string ID = it->second.get<string>("ID");
        string Name = it->second.get<string>("Name");
        std::cout << key << " " << ID << " " << Name << std::endl;
    }
}
void main()
{
    generate_user();
    read_user();

}

结果：

{
    "user": {
        "1": {
            "ID": "1",
            "Name": "wang"
        },
        "2": {
            "ID": "2",
            "Name": "zhang"
        },
        "3": {
            "ID": "3",
            "Name": "li"
        }
    }
}