[#rapidjson#jsoncpp ]#cpp #json

jsoncpp.cc

#include <fstream>
#include <cassert>
#include "json/json.h"
 
// json文件的读取
int main() {
    ifstream ifs;
    // 打开数据文件
    ifs.open("testjson.json");
    assert(ifs.is_open());
 
    Json::Reader reader;
    Json::Value root;
    if (!reader.parse(ifs, root, false))
    {
        return -1;
    }
 
    std::string name = root["name"].asString();
    int age = root["age"].asInt();
 
    std::cout<<name<<std::endl;
    std::cout<<age<<std::endl;
 
    return 0;
}

// json文件的解析
#pragma comment(lib, "json_mtd.lib")
 
#include <fstream>
#include <cassert>
#include "json/json.h"
 
int main() {
    ifstream ifs;
    ifs.open("testjson.json");
    assert(ifs.is_open());
 
    Json::Reader reader;
    Json::Value root;
    // 解析成功返回false
    if (!reader.parse(ifs, root, false)) {
        return -1;
    }
 
    std::string name = root["name"].asString();
    int age = root["age"].asInt();
 
    std::cout<<name<<std::endl;
    std::cout<<age<<std::endl;
 
    return 0;
}


// json文件的写入
#include <fstream>
#include <cassert>
#include "json/json.h"

int main() {
    Json::Value root;
    Json::FastWriter writer;
    Json::Value person;
 
    person["name"] = "hello world";
    person["age"] = 100;
    root.append(person);
 
    std::string json_file = writer.write(root);
 
 
    ofstream ofs;
    ofs.open("test1.json");
    assert(ofs.is_open());
    ofs<<json_file;
 
    return 0;
}

// 序列化操作
/*
{
   "array" : [
      {
         "key" : 0
      },
      {
         "key" : 1
      },
      {
         "key" : 2
      },
      {
         "key" : 3
      },
      {
         "key" : 4
      },
      {
         "key" : 5
      },
      {
         "key" : 6
      },
      {
         "key" : 7
      },
      {
         "key" : 8
      },
      {
         "key" : 9
      }
   ],
   "key1" : "value1",
   "key2" : "value2"
}

*/
#include <iostream>
#include <string>
#include "json/json.h"
 
int main(void)
{
     Json::Value root;
     Json::Value arrayObj;
     Json::Value item;
 
     for (int i = 0; i < 10; i ++)
     {
      item["key"] = i;
      arrayObj.append(item);
     }
 
     root["key1"] = "value1";
     root["key2"] = "value2";
     root["array"] = arrayObj;
     //root.toStyledString();
     std::string out = root.toStyledString();
     std::cout << out << std::endl;
     return 0;
}

// 获取所有的成员
Json::Value::Members member;  //  Members  这玩意就是vector<string>，typedef了而已
for (Json::Value::iterator itr = objArray.begin(); itr != objArray.end(); itr++)
{
    member = (*itr).getMemberNames();
    for (Json::Value::Members::iterator iter = member.begin(); iter != member.end(); iter++)
    {
        string str_temp = (*itr)[(*iter)].asString();
    }
}

rapidjson.cc

rapidjson::Document document;
document.Parse(json_param_str);

if (document.HasParseError() || !document.IsObject()) {
  return false;
}

rapidjson::Value::ConstMemberIterator iter = document.FindMember("data_names");
if (iter == document.MemberEnd() || !iter->value.IsString()) {
  return false;
}
request_param->table_name = iter->value.GetString();
if (!IsTableNameValid(request_param->table_name)) {
  return false;
}




// response_format可选
// 0 表示返回json格式的数据，1 表示返回类似于cdn上game detail.js上的数据
// 默认为0
iter = document.FindMember("response_format");
if (iter != document.MemberEnd() && iter->value.IsInt()) {
  int32_t response_format = iter->value.GetInt();
  request_param->is_response_type_javascript = (response_format == 1);
}


void ErrorResponse(HttpResponse* response, uint32_t error_code, const std::string& error_message) {
    // TODO(vectorfeng): 不需要使用rapidjson
    rapidjson::StringBuffer sb;
    rapidjson::Writer<rapidjson::StringBuffer> writer(sb);
    writer.StartObject();
    writer.String("result");
    writer.StartObject();
    writer.String("error_code");
    writer.Int64(error_code);
    writer.String("error_message");
    writer.String(error_message);
    writer.EndObject();
    writer.EndObject();

    response->mutable_http_body()->assign(sb.GetString(), sb.GetLength());
    response->set_status(HttpResponse::Status_OK);
    response->SetHeader(kHeaderContentType, kHeaderContentTypeJsonValue);
}