jsoncpp文件解析

/json文件解析
int read_rect_info(string datajson)
{
//读流文件形式
ifstream in("./rect/rect.json", ios::binary);
JSONCPP_STRING err;
Json::Value root;

Json::CharReaderBuilder builder;

if (!parseFromStream(builder, in, &root, &err)) //从ifs中读取数据到jsonRoot
{
	cout << "json file is not find...";
	return EXIT_FAILURE;
}

std::cout << root.toStyledString() << std::endl; //输出到控制台

in.close();

#if 0 //读字符串形式

const std::string rawJson = datajson;
const auto rawJsonLength = static_cast<int>(rawJson.length());
const std::unique_ptr<Json::CharReader> reader(builder.newCharReader());
if (!reader->parse(rawJson.c_str(), rawJson.c_str() + rawJsonLength, &root,
	&err)) {
	std::cout << "error" << std::endl;
	return EXIT_FAILURE;
}

#endif

for (int i = 0; i < root.size(); i++)
{
	
	rect_area *element=new rect_area;
	element->area_name = root[i]["area_name"].asString();
	element->x = root[i]["rect_x"].asInt();
	element->y = root[i]["rect_y"].asInt();
	element->width = root[i]["rect_width"].asInt();
	element->heigth = root[i]["rect_heigth"].asInt();
	rect_map.insert(std::make_pair(element->area_name, element));
	
	
}

return EXIT_SUCCESS;

}