C++ 使用 boost 获取当地时间
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get local time with boost
提问by Max Frai
I didn't find this in documentation: how to get local time (better formatted) with boost?
我没有在文档中找到这个:如何使用 boost 获取本地时间(更好的格式)?
回答by Nate
Use posix_timeto construct a time object from the system clock.
使用posix_time从系统时钟构造一个时间对象。
For example, this would output the current system time as an ISO-format string:
例如,这会将当前系统时间输出为 ISO 格式的字符串:
namespace pt = boost::posix_time;
pt::to_iso_string(pt::second_clock::local_time());
For formatting alternatives, see the “Conversion to String” section of the above-linked reference and the Date Time Input/Outputreference. Alternatively, you can build your own output string using the accessor functions. For example, to get a US-style date:
有关格式化替代方案,请参阅上述链接参考和日期时间输入/输出参考的“转换为字符串”部分。或者,您可以使用访问器函数构建自己的输出字符串。例如,要获取美国风格的日期:
namespace pt = boost::posix_time;
pt::ptime now = pt::second_clock::local_time();
std::stringstream ss;
ss << static_cast<int>(now.date().month()) << "/" << now.date().day()
<< "/" << now.date().year();
std::cout << ss.str() << std::endl;
Note the month is cast to int
so it will display as digits. The default output facet will display it as the three-letter month abbreviation (“Mar” for March).
请注意月份被强制转换为int
因此它将显示为数字。默认输出方面将其显示为三个字母的月份缩写(“Mar”代表三月)。
回答by zeroDivisible
I don't know if this will be of any help, but boost docs have some examplesof formatting dates.
我不知道这是否有任何帮助,但是 boost 文档有一些格式化日期的示例。
Plus, I think that this articledescribes some basics, which are worth looking at.
另外,我认为这篇文章描述了一些基础知识,值得一看。
回答by jsight
Use the Date Time Input/Output APIs:
使用日期时间输入/输出 API:
http://www.boost.org/doc/libs/1_42_0/doc/html/date_time/date_time_io.html#date_time.io_objects
http://www.boost.org/doc/libs/1_42_0/doc/html/date_time/date_time_io.html#date_time.io_objects