如何使用 Boost 库在格式 dd/mm/yyyy H?
How could I print the current date, using Boost libraries, in the format dd/mm/yyyy H?
我有什么:
boost::posix_time::ptime now = boost::posix_time::second_clock::local_time();
cout << boost::posix_time::to_simple_string(now).c_str();
2009-Dec-14 23:31:40
但我想要:
2009 年 12 月 14 日 23:31:40
14-Dec-2009 23:31:40
如果您使用的是 Boost.Date_Time,这是使用 IO facet 完成的.
If you're using Boost.Date_Time, this is done using IO facets.
您需要包含 boost/date_time/posix_time/posix_time_io.hpp
以获得正确的 facet 类型定义(wtime_facet
、time_facet
等.) 用于 boost::posix_time::ptime
.完成后,代码非常简单.您在要输出到的 ostream
上调用 imbue,然后输出您的 ptime
:
You need to include boost/date_time/posix_time/posix_time_io.hpp
to get the correct facet typedefs (wtime_facet
, time_facet
, etc.) for boost::posix_time::ptime
. Once this is done, the code is pretty simple. You call imbue on the ostream
you want to output to, then just output your ptime
:
#include <iostream>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/date_time/posix_time/posix_time_io.hpp>
using namespace boost::posix_time;
using namespace std;
int main(int argc, char **argv) {
time_facet *facet = new time_facet("%d-%b-%Y %H:%M:%S");
cout.imbue(locale(cout.getloc(), facet));
cout << second_clock::local_time() << endl;
}
输出:
14-Dec-2009 16:13:14
另见格式列表标记在boost文档中,以防你想输出一些更有趣的东西.
See also the list of format flags in the boost docs, in case you want to output something fancier.
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