C++ 将日期时间字符串干净地转换为纪元

Question

是否有 C/C++/STL/Boost clean 方法将日期时间字符串转换为纪元时间(以秒为单位)？

yyyy:mm:dd hh:mm:ss

Answer 1

参见:Date/time conversion: string representation to time_t

并且:[Boost-users] [date_time] So how come there isn't a to_time_t helper func?

所以，显然这样的事情应该可行:

#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's suggestion 干净多少: 使用sscanf将数据解析为struct tm，然后调用mktime。