c++用rapidjson解析json串

业务需要消息传递以json形式，使用rapidjson。

把json所有的值对存进一个map里，再根据业务需要判断指令。

定义

using rapidjson_object = rapidjson::GenericObject<false, rapidjson::Value>;
using rapidjson_object_son = rapidjson::GenericObject<true, rapidjson::Value>;

#include "rapidjson/document.h"

//using rapidjson_object = rapidjson::GenericObject<false, rapidjson::Value>;
//using rapidjson_object_son = rapidjson::GenericObject<true, rapidjson::Value>;
//map<string, string> m_jsonRelease;
void test_deal_with_simple_type(const int &num) 
{ 
    printf("%d", num); 
}
void test_deal_with_simple_type(string str) 
{ 
    printf("%s", str); 
}
void CommandRespond::test_deal_with_son_obj(const rapidjson_object_son &obj)
{
    for (const auto &itr : obj)
    {
        if (itr.value.IsInt())
        {
            string str = itr.name.GetString();
            int ivalue = itr.value.GetInt();
            string value = std::to_string(ivalue);
            m_jsonRelease[str] = value;
            test_deal_with_simple_type(itr.value.GetInt());
        }
        if (itr.value.IsString())
        {
            m_jsonRelease[itr.name.GetString()] = itr.value.GetString();
            test_deal_with_simple_type(itr.value.GetString());
        }
        if (itr.value.IsArray())
        {
            int num = 0;
            const auto son_vec = itr.value.GetArray();
            for (const auto & ele : son_vec)
            {
                if (ele.IsObject())
                {
                    const auto son_obj = ele.GetObj();
                    test_deal_with_son_obj(son_obj);
                    continue;
                }
                num = ele.GetInt();
            }
        }
    }
}
void CommandRespond::test_Deal_with_obj(const rapidjson_object &obj)
{
    for (const auto &itr:obj)
    {
        if (itr.value.IsInt())
        {
            string str = itr.name.GetString();
            int ivalue = itr.value.GetInt();
            string value = std::to_string(ivalue);
            m_jsonRelease[str] = value;
            //test_deal_with_simple_type(itr.value.GetInt());
        }
        if (itr.value.IsString())
        {
            m_jsonRelease[itr.name.GetString()] = itr.value.GetString();
            //test_deal_with_simple_type(itr.value.GetString());
        }
        if (itr.value.IsArray())
        {
            int num = 0;
            const auto son_vec = itr.value.GetArray();
            for (const auto & ele : son_vec)
            {
                if (ele.IsObject())
                {
                    const auto son_obj = ele.GetObj();
                    test_deal_with_son_obj(son_obj);
                    continue;
                }
                num = ele.GetInt();
            }
        }
    }
}
map<string, string> CommandRespond::dealwithjson(const char * json)
{
    rapidjson::Document doc;
    rapidjson::ParseResult ok = doc.Parse(json);
    if (!ok)
        return m_jsonRelease;
    const auto start_obj = doc.GetObj();
    test_Deal_with_obj(start_obj);
    //if (doc.HasMember("id"))
    //{
    //    id = doc["id"].GetInt();
    //}
    //for (Value::ConstMemberIterator itr = doc.MemberBegin(); itr!=doc.MemberEnd();itr++)
    //{
    //    Value JsonName;
    //    Value JsonValue;
    //    Document::AllocatorType allocator;
    //    JsonName.CopyFrom(itr->name, allocator);
    //    JsonValue.CopyFrom(itr->value, allocator);
    //    if (JsonValue.IsObject())
    //    {
    //    }
    //}

    return m_jsonRelease;
}

 

 简单一点儿，就解析固定json

    rapidjson::Document doc;
    rapidjson::ParseResult ok = doc.Parse(json);
    if (!ok)
        return m_jsonRelease;
    if (doc.HasMember("id"))
    {
        int id = doc["id"].GetInt();
    }    

 

 

rapidjson递归解析json，C++_李健LL的博客-CSDN博客_rapidjson解析json

用rapidjson解析json数据 - baishengguan - 博客园 (cnblogs.com)