C ++将Datetime字符串转换为Epoch Cleanly [英] C++ Converting a Datetime String to Epoch Cleanly

问题描述

有没有C / C ++ / STL / Boost clean方法将日期时间字符串转换为时代（以秒为单位）？

Is there a C/C++/STL/Boost clean method to convert a date time string to epoch time (in seconds)?

yyyy:mm:dd hh:mm:ss

推荐答案

p>请参阅：日期/时间转换：字符串表示为time_t

And： [Boost-users] [date_time]那么怎么没有一个to_time_t helper func？

所以，显然这样的东西应该工作：

So, apparently something like this should work:

#include <boost/date_time/posix_time/posix_time.hpp>
using namespace boost::posix_time;

std::string ts("2002-01-20 23:59:59");
ptime t(time_from_string(ts));
ptime start(gregorian::date(1970,1,1)); 
time_duration dur = t - start; 
time_t epoch = dur.total_seconds();    

但我不认为它比 Rob的建议：使用 sscanf 来解析数据转换成 struct tm ，然后调用 mktime 。

But I don't think it's much cleaner than Rob's suggestion: use sscanf to parse the data into a struct tm and then call mktime.

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