C++之RapidJSON解析json数据

线上幽灵 2019-05-26 10:20:15
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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/90573407

RapidJSON 是一个 C++ 的 JSON 解析器及生成器。

JSON文本：

由于复制的过程中，json文本可以出现错误，可以用将json文本复制到 JSON在线编辑器 验证一下。

解析代码：

#include<string>
#include<fstream>
#include<iostream>
#include"document.h"
using namespace std;
int main () {
  std::ifstream t("./document.json");
  std::string str((std::istreambuf_iterator<char>(t)),
                  std::istreambuf_iterator<char>());
  rapidjson::Document document;
  document.Parse(str.c_str());
  rapidjson::Value::ConstMemberIterator iter = document.FindMember("name");
  if(iter != document.MemberEnd()){
    cout << "name : " << iter->value.GetString() << endl;
  iter = document.FindMember("gender");
  if(iter != document.MemberEnd()){
    cout << "gender : " << iter->value.GetString() << endl;
  if(document.HasMember("hobby")){
    cout << "hobby : " << endl;
    const rapidjson::Value& childValue = document["hobby"];
    for(rapidjson::SizeType i = 0; i < childValue.Size(); ++i){
      cout << "    " << childValue[i].GetString() << endl;
  if(document.HasMember("score")){
    cout << "score : " << endl;
    const rapidjson::Value& childIter = document["score"];
    for(rapidjson::Value::ConstMemberIterator it = childIter.MemberBegin(); it != childIter.MemberEnd(); ++it){
      cout << "    " << it->name.GetString() << " : " << it->value.GetDouble() << endl;
  if(document.HasMember("lover")){
    cout << "lover : " << endl;
    const rapidjson::Value& chileValue = document["lover"];
    rapidjson::Value::ConstMemberIterator chileIter = chileValue.FindMember("name");
    if(chileIter != chileValue.MemberEnd()){
      cout << "    " << "name : " << chileIter->value.GetString() << endl;
    chileIter = chileValue.FindMember("gender");
    if(chileIter != chileValue.MemberEnd()){
      cout << "    " << "gender : " << chileIter->value.GetString() << endl;
    if(chileValue.HasMember("hobby")){
      cout << "    " << "hobby : " << endl;
      const rapidjson::Value& chile2Value = chileValue["hobby"];
      for(rapidjson::SizeType i = 0; i < chile2Value.Size(); ++i){
        cout << "        " << chile2Value[i].GetString() << endl;
    if(chileValue.HasMember("score")){
      cout << "    " << "score : " << endl;
      const rapidjson::Value& child2Iter = chileValue["score"];
      for(rapidjson::Value::ConstMemberIterator it = child2Iter.MemberBegin(); it != child2Iter.MemberEnd(); ++it){
        cout << "        " << it->name.GetString() << " : " << it->value.GetDouble() << endl;
输出结果：