C++之RapidJSON生成json数据

C++之RapidJSON生成json数据

线上幽灵 2019-06-28 20:44:43

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版权声明：本文为CSDN博主「线上幽灵」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/chen134225/article/details/94046308

 

RapidJSON 是一个 C++ 的 JSON 解析器及生成器。

1.代码：

#include<map>
#include<string>
#include<vector>
#include<fstream>
#include<iostream>

#include "rapidjson/document.h"
#include "rapidjson/writer.h"
#include "rapidjson/stringbuffer.h"

using namespace std;

int main () {

  string name = "xiaoming";
  string gender = "boy";
  vector<string> hobby = {"足球","篮球","电影"};
  map<string, double> score = {{"数学",91.5},{"语文", 95.5},{"英语", 96}};

  string lover_name = "xiaohong";
  string love_gender = "girl";
  vector<string> lover_hobby = {"画画","跳舞","唱歌"};
  map<string, double> lover_score = {{"数学", 78.5},{"语文", 89},{"英语", 90}};

  rapidjson::StringBuffer s;
  rapidjson::Writer<rapidjson::StringBuffer> writer(s);
  writer.StartObject();

  writer.Key("name");
  writer.String(name.c_str());
  writer.Key("gender");
  writer.String(gender.c_str());

  writer.Key("hobby");
  writer.StartArray();
  for(auto &item : hobby){
    writer.String(item.c_str());
  }
  writer.EndArray();

  writer.Key("socre");
  writer.StartObject();
  for(auto &item : score){
    writer.Key((item.first).c_str());
    writer.Double(item.second);
  }
  writer.EndObject();

  writer.Key("lover");
  writer.StartObject();

  writer.Key("name");
  writer.String(lover_name.c_str());
  writer.Key("gender");
  writer.String(love_gender.c_str());

  writer.Key("hobby");
  writer.StartArray();
  for(auto &item : lover_hobby){
    writer.String((item.c_str()));
  }
  writer.EndArray();

  writer.Key("score");
  writer.StartObject();
  for(auto &item : lover_score){
    writer.Key((item.first).c_str());
    writer.Double(item.second);
  }
  writer.EndObject();

  writer.EndObject();

  writer.EndObject();

  //将生成的json数据写入json1.txt文件中
  std::string outFileName = "json1.txt";
  std::ofstream outfile(outFileName,std::ios::trunc);
  outfile << s.GetString();
  outfile.close();

  std::cout << s.GetString() << std::endl;

}
 

2.上面代码生成的JSON文本

{
    "name": "xiaoming",
    "gender": "boy",
    "hobby": ["足球", "篮球", "电影"],
    "socre": {
        "数学": 91.5,
        "英语": 96.0,
        "语文": 95.5
    },
    "lover": {
        "name": "xiaohong",
        "gender": "girl",
        "hobby": ["画画", "跳舞", "唱歌"],
        "score": {
            "数学": 78.5,
            "英语": 90.0,
            "语文": 89.0
        }
    }
}