C++获取当前时间并格式化为字符串

代码一

#include<iostream>
#include<chrono>

int main()
{
	auto nowTime = std::chrono::system_clock::now();
	auto nowTimeT = std::chrono::system_clock::to_time_t(nowTime);
	auto pNowTm = std::localtime(&nowTimeT);

	char buf[128];
	std::strftime(buf, sizeof(buf), "%Y-%m-%d-%H-%M-%S", pNowTm);

	std::string strNowTime(buf);

	std::cout << "strNowTime:" << strNowTime << std::endl;

	return 0;
}

代码二

#include<iostream>  

#include"boost/date_time/posix_time/posix_time.hpp"  

int main()
{
	boost::posix_time::ptime nowTime = boost::posix_time::microsec_clock::local_time();
	boost::posix_time::time_facet* pFacet = new boost::posix_time::time_facet();

	pFacet->format("%Y%m%d%H%M%S%F");

	std::stringstream strStream;

	strStream.imbue(std::locale(std::locale::classic(), pFacet));
	strStream << nowTime;
	auto strNowTime = strStream.str();

	std::cout << "strNowTime:" << strNowTime << std::endl;

	//delete pFacet;不需要，写上反而会抛异常  

	return 0;
}