問題描述
我正在使用 Azure REST API，他們正在使用它來創建表存儲的請求正文:
I'm working with the Azure REST API and they are using this to create the request body for table storage:
DateTime.UtcNow.ToString("o")
產生:
2012-03-02T04:07:34.0218628Z
2012-03-02T04:07:34.0218628Z
它被稱為往返"，顯然它是一個 ISO 標準(參見 http://en.wikipedia.org/wiki/ISO_8601) 但我不知道如何在閱讀 wiki 文章后復制它.
It is called "round-trip" and apparently it's an ISO standard (see http://en.wikipedia.org/wiki/ISO_8601) but I have no idea how to replicate it after reading the wiki article.
有誰知道 Boost 是否支持這個，或者可能 Qt?
Does anyone know if Boost has support for this, or possibly Qt?
推薦答案
如果到最接近秒的時間足夠精確，可以使用strftime:
If the time to the nearest second is precise enough, you can use strftime:
#include <ctime>
#include <iostream>
int main() {
time_t now;
time(&now);
char buf[sizeof "2011-10-08T07:07:09Z"];
strftime(buf, sizeof buf, "%FT%TZ", gmtime(&now));
// this will work too, if your compiler doesn't support %F or %T:
//strftime(buf, sizeof buf, "%Y-%m-%dT%H:%M:%SZ", gmtime(&now));
std::cout << buf << "
";
}
如果您需要更高的精度，可以使用 Boost:
If you need more precision, you can use Boost:
#include <iostream>
#include <boost/date_time/posix_time/posix_time.hpp>
int main() {
using namespace boost::posix_time;
ptime t = microsec_clock::universal_time();
std::cout << to_iso_extended_string(t) << "Z
";
}
這篇關于如何在 C++ 中構建 ISO 8601 日期時間?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！