如何使用boost将datetime格式化为字符串？ [英] How to format a datetime to string using boost?

问题描述

我想使用boost格式化字符串的日期/时间。

I want to format a date/time to a string using boost.

从当前日期/时间开始：

Starting with the current date/time:

ptime now = second_clock::universal_time();

，并以包含日期/时间的wstring结尾，格式如下：

and ending up with a wstring containing the date/time in this format:

%Y%m%d_%H%M%S

你能告诉我代码实现吗？非常感谢。

Can you show me the code to achieve this? Thanks.

推荐答案

对于任何值得的，这里是我写的函数：

For whatever it is worth, here is the function that I wrote to do this:

#include "boost/date_time/posix_time/posix_time.hpp"
#include <iostream>
#include <sstream>

std::wstring FormatTime(boost::posix_time::ptime now)
{
  using namespace boost::posix_time;
  static std::locale loc(std::wcout.getloc(),
                         new wtime_facet(L"%Y%m%d_%H%M%S"));

  std::basic_stringstream<wchar_t> wss;
  wss.imbue(loc);
  wss << now;
  return wss.str();
}

int main() {
  using namespace boost::posix_time;
  ptime now = second_clock::universal_time();

  std::wstring ws(FormatTime(now));
  std::wcout << ws << std::endl;
  sleep(2);
  now = second_clock::universal_time();
  ws = FormatTime(now);
  std::wcout << ws << std::endl;

}

此程式的输出为：

20111130_142732
20111130_142734

$ b b

我发现这些链接很有用：

I found these links useful:

• C ++ Boost日期格式为dd / mm / yyyy？


• http://www.boost.org/doc/libs/1_35_0/doc/html/date_time/ date_time_io.html＃date_time.time_facet


• http：/ /www.cplusplus.com/reference/iostream/stringstream/str/

• C++ Boost date with format dd/mm/yyyy?
• http://www.boost.org/doc/libs/1_35_0/doc/html/date_time/date_time_io.html#date_time.time_facet
• http://www.cplusplus.com/reference/iostream/stringstream/str/

这篇关于如何使用boost将datetime格式化为字符串？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！