c++之json

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

using namespace rapidjson;
//解析json
int main() {
    // 1. Parse a JSON string into DOM.
    
    const char* json = "{\"id\":\"dd2fb82d-26a5-48d6-abf9-6d8ea7889b3f\",\"imp\":[{\"id\":\"1963\",\"native\":{\"assets\":[{\"id\":0,\"required\":1,\"title\":{\"len\":50}},{\"id\":1,\"required\":1,\"img\":{\"w\":500,\"h\":300,\"type\":3}},{\"id\":2,\"required\":0,\"data\":{\"type\":2}}]}}],\"device\":{\"ua\":\"testua\",\"geo\":{\"lat\":39.99559783935547,\"lon\":116.40010070800781},\"ip\":\"58.24.0.17\",\"deviceType\":4,\"make\":\"Xiaomi\",\"model\":\"7 Plus\",\"os\":\"Android\",\"osv\":\"7.35.3\",\"h\":1136,\"w\":640,\"carrier\":1,\"connectiontype\":2,\"did\":\"862224036233396\",\"dpid\":\"bf908f5a193294f2\",\"mac\":\"02:00:00:00:00:00\"}}";
    rapidjson::Document dom;
    if(dom.Parse(json).HasParseError()==0){
        if(dom.HasMember("id") && dom["id"].IsString()){
            std::cout<<"id:"<<dom["id"].GetString()<<std::endl;
        }
        if(dom.HasMember("imp") && dom["imp"].IsArray()){
            const rapidjson::Value& imp = dom["imp"];
            for(int i =0;i<imp.Size();i++){
                if(imp[i].HasMember("id") && imp[i]["id"].IsString()){
                    std::cout<<"id:"<<imp[i]["id"].GetString()<<std::endl;
                }
                if(imp[i].HasMember("native")&& imp[i]["native"].IsObject()){
                    const rapidjson::Value& native = imp[i]["native"];
                    if(native.HasMember("assets")){
                        const rapidjson::Value& assets = native["assets"];
                        for(int i =0;i<assets.Size();i++){
                            const rapidjson::Value& obj = assets[i];
                            std::cout<<"assets:id: "<<obj["id"].GetInt()<<std::endl;
                            std::cout<<"assets:required: "<<obj["required"].GetInt()<<std::endl;
                            if(obj.HasMember("title")){
                                std::cout<<"assets:title:len: "<<obj["title"]["len"].GetInt()<<std::endl;
                            }
                            if(obj.HasMember("img")){
                                std::cout<<"assets:img:w: "<<obj["img"]["w"].GetInt()<<std::endl;
                                std::cout<<"assets:img:h: "<<obj["img"]["h"].GetInt()<<std::endl;
                                std::cout<<"assets:img:type: "<<obj["img"]["type"].GetInt()<<std::endl;
                            }
                            if(obj.HasMember("data")){
                                std::cout<<"assets:data:type: "<<obj["data"]["type"].GetInt()<<std::endl;
                            }
                        }
                    }
                }
            }
        }
        if(dom.HasMember("device")){

            std::cout<<"device:ua: "<<dom["device"]["ua"].GetString()<<std::endl;
            std::cout<<"device:ip: "<<dom["device"]["ip"].GetString()<<std::endl;
            if(dom["device"].HasMember("geo")){
                std::cout<<"device:geo:lat: "<<dom["device"]["geo"]["lat"].GetDouble()<<std::endl;
                std::cout<<"device:geo:lon: "<<dom["device"]["geo"]["lon"].GetDouble()<<std::endl;
            }
            std::cout<<"device:deviceType: "<<dom["device"]["deviceType"].GetInt()<<std::endl;
            std::cout<<"device:make: "<<dom["device"]["make"].GetString()<<std::endl;
            std::cout<<"device:model: "<<dom["device"]["model"].GetString()<<std::endl;
            std::cout<<"device:os: "<<dom["device"]["os"].GetString()<<std::endl;
            std::cout<<"device:osv: "<<dom["device"]["osv"].GetString()<<std::endl;
            std::cout<<"device:h: "<<dom["device"]["h"].GetInt()<<std::endl;
            std::cout<<"device:w: "<<dom["device"]["w"].GetInt()<<std::endl;
            std::cout<<"device:carrier: "<<dom["device"]["carrier"].GetInt()<<std::endl;
            std::cout<<"device:connectiontype: "<<dom["device"]["connectiontype"].GetInt()<<std::endl;
            std::cout<<"device:did: "<<dom["device"]["did"].GetString()<<std::endl;
            std::cout<<"device:dpid: "<<dom["device"]["dpid"].GetString()<<std::endl;
            std::cout<<"device:mac: "<<dom["device"]["mac"].GetString()<<std::endl;
        }
    }
    return 0;
}