RapidJSON解析和生成Json

RapidJSON学习

• RapidJSON获取json数据键值对的key和value
  

std::string output = "";

output += "Deck: \n";
// deck
for (unsigned j = 0; j < (document["data"])["deck"].Size(); j++) {
    // deck内遍历
    for (rapidjson::Value::ConstMemberIterator iter = ((document["data"])[i]["deck"])[j].MemberBegin(); iter != ((document["data"])["deck"])[j].MemberEnd(); iter++) {
        rapidjson::Value jKey;
        rapidjson::Value jValue;
        Document::AllocatorType allocator;
        jKey.CopyFrom(iter->name, allocator);
        jValue.CopyFrom(iter->value, allocator);
        if (jKey.IsString()) {
            std::string name = jKey.GetString();
            std::string value = cocos2d::Value(jValue.GetInt()).asString();
            output += "    " +  name + ':' + value + '\n';
        }
    }
    output += "    ---\n";
}
output += "---\n";

• RapidJSON创建Json
  场景：用户输入用户名和密码，然后将信息组合生成json

    rapidjson::Document document;
    document.SetObject();
    rapidjson::Document::AllocatorType& allocator = document.GetAllocator();

    //用户名
    rapidjson::Value username(StringRef(usernameInput->getString().c_str()));
    document.AddMember("username", username, allocator);

    //密码
    rapidjson::Value password(StringRef(passwordInput->getString().c_str()));
    document.AddMember("password", password, allocator);

    StringBuffer buffer;
    rapidjson::Writer<StringBuffer> writer(buffer);
    document.Accept(writer);
    //log("%s\n", buffer.GetString());