linux和windows通用时间类

这个时间类主要是用来获取系统毫秒时间、时区、当地时间，以及对传入的时间的转换，适用于linux和windows。

TimeUtility.h

#pragma once
#include 
#pragma once
#include 
namespace COMMON
{
	namespace UTILITY
	{
		class TimeUtility
		{
		public:
			TimeUtility();
			~TimeUtility();
			static unsigned long GetTickCount2();
			static time_t ConvertTimerToTime_t(std::string dateTime);
			static std::string ConvertTime_tToTimeString(time_t time);
			static std::string formatA(const char* fmt, ...);
			static int GetTimezone();
			static time_t StringUTCToTime_t(const std::string& strUTCTime);
			static std::string StringUTCToLocal(std::string UTCTime);
			static std::string StringLocalToUTC(std::string localTime);
			static time_t StringLocalToTime_t(const std::string& strLocalTime);
			static std::string StringTimeAddSecond(const std::string& dateTime, const char ops, time_t second);
		};
	}
}

TimeUtility.cpp

#include "TimeUtility.h"
#ifdef WIN32
#include 
#include 
#include 
#else
#include 
#endif
#include 
#include 
#include 
#include 
#include 
#include 
#include 

namespace COMMON
{
	namespace UTILITY
	{
		TimeUtility::TimeUtility()
		{
		}

		TimeUtility::~TimeUtility()
		{
		}

		unsigned long TimeUtility::GetTickCount2() //获取当前系统毫秒时间
		{
#ifdef WIN32
			return GetTickCount();
#else
			struct timeval tv;
			if (gettimeofday(&tv, nullptr) != 0)
				return 0;

			return (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
#endif
		}

		std::string TimeUtility::ConvertTime_tToTimeString(time_t time)
		{
#ifdef WIN32
			SYSTEMTIME sysTime;

			FILETIME ft;
			LONGLONG ll = Int32x32To64(time, 10000000) + 116444736000000000;
			ft.dwLowDateTime = (DWORD)ll;
			ft.dwHighDateTime = (DWORD)(ll >> 32);

			FileTimeToSystemTime(&ft, &sysTime);

			std::ostringstream os;
			os.fill('0');
			os.width(4);
			os << sysTime.wYear << "-";
			os.width(2);
			os << sysTime.wMonth << "-";
			os.width(2);
			os << sysTime.wDay << "T";
			os.width(2);
			os << sysTime.wHour << ":";
			os.width(2);
			os << sysTime.wMinute << ":";
			os.width(2);
			os << sysTime.wSecond;
			return os.str();
#else
			struct tm readableTime;
			gmtime_r(&time, &readableTime);
			
			return formatA("%04d-%02d-%02dT%02d:%02d:%02d",
				readableTime.tm_year + 1900, readableTime.tm_mon + 1, readableTime.tm_mday,
				readableTime.tm_hour, readableTime.tm_min, readableTime.tm_sec);
#endif
		}

		time_t TimeUtility::ConvertTimerToTime_t(std::string dateTime)
		{
			time_t result = 0;
			std::replace(dateTime.begin(), dateTime.end(), '-', ' ');
			std::replace(dateTime.begin(), dateTime.end(), 'T', ' ');
			std::replace(dateTime.begin(), dateTime.end(), ':', ' ');

			std::istringstream is(dateTime);
			int year = 0;
			int month = 0;
			int day = 0;
			int hour = 0;
			int minute = 0;
			int seconds = 0;
			is >> year >> month >> day >> hour >> minute >> seconds;

			tm t = { 0 };
			t.tm_year = year - 1900;
			t.tm_mon = month - 1;
			t.tm_mday = day;
			t.tm_hour = hour;
			t.tm_min = minute;
			t.tm_sec = seconds;
#if defined(_WIN32) || defined(_WIN64)
			result = _mkgmtime64(&t) * 1000;
#elif defined(__linux__)
			result = timegm(&t) * 1000;
#endif
			return result;
		}

		std::string TimeUtility::formatA(const char* fmt, ...)
		{
			std::string strResult;
			const int maxLen = 1024;
			
			if (fmt)
			{
				char *temp = new(std::nothrow) char[maxLen]();
				
				va_list argList;
				va_start(argList, fmt);
				
#if defined(_WIN32) || defined(_WIN64)
				if(vsnprintf_s(temp, maxLen, maxLen, fmt, argList) > 0)
#elif defined(__linux__)
				if(vsnprintf(temp, maxLen, fmt, argList) > 0)
#endif
					strResult = temp;
				
				delete [] temp;
				va_end(argList);
			}

			return strResult;
		}

		int TimeUtility::GetTimezone()
		{
			static int zone = -13;
			struct tm *pt;
			time_t now, tmp;

			if (zone == -13)
			{
				/* 返回UTC时骸间 */
				now = time(NULL);
				/* 解析UTC时骸间 */
				pt = gmtime(&now);
				if (pt)
				{
					/* 构造本时区的UTC时间 */
					tmp = mktime(pt);
					zone = (now - tmp) / 3600;
				}
				else
					zone = 8;
			}
			return zone;
		}

		time_t TimeUtility::StringUTCToTime_t(const std::string& strUTCTime)
		{
			struct tm tTp = { 0 };
			int nYear, nMon, nDay, nHour, nMin, nSec;
			sscanf(strUTCTime.c_str(), "%d-%d-%dT%d:%d:%d", &nYear, &nMon, &nDay, &nHour, &nMin, &nSec);
			tTp.tm_year = nYear - 1900;
			tTp.tm_mon = nMon - 1;
			tTp.tm_mday = nDay;
			tTp.tm_hour = nHour + GetTimezone();
			tTp.tm_min = nMin;
			tTp.tm_sec = nSec;
			return mktime(&tTp);
		}

		time_t TimeUtility::StringLocalToTime_t(const std::string& strLocalTime)
		{
			struct tm tTp = { 0 };
			int nYear, nMon, nDay, nHour, nMin, nSec;
			sscanf(strLocalTime.c_str(), "%d-%d-%dT%d:%d:%d", &nYear, &nMon, &nDay, &nHour, &nMin, &nSec);
			tTp.tm_year = nYear - 1900;
			tTp.tm_mon = nMon - 1;
			tTp.tm_mday = nDay;
			tTp.tm_hour = nHour;// +GetTimezone();
			tTp.tm_min = nMin;
			tTp.tm_sec = nSec;
			return mktime(&tTp);
		}

		std::string TimeUtility::StringUTCToLocal(std::string UTCTime)
		{
			time_t bg = StringUTCToTime_t(UTCTime);
			struct tm* pt = localtime(&bg);

			std::string strLocalTime = formatA("%04d-%02d-%02dT%02d:%02d:%02d", pt->tm_year + 1900, pt->tm_mon + 1, pt->tm_mday,
				pt->tm_hour, pt->tm_min, pt->tm_sec);
			return strLocalTime;
		}

		std::string TimeUtility::StringLocalToUTC(std::string localTime)
		{
			time_t bg = StringLocalToTime_t(localTime);
			struct tm* pt = gmtime(&bg);

			std::string strUTCTime = formatA("%04d-%02d-%02dT%02d:%02d:%02d", pt->tm_year + 1900, pt->tm_mon + 1, pt->tm_mday,
				pt->tm_hour, pt->tm_min, pt->tm_sec);
			return strUTCTime;
		}

		std::string TimeUtility::StringTimeAddSecond(const std::string& dateTime, const char ops, time_t second)
		{
			time_t sec = StringUTCToTime_t(dateTime);

			if (ops == '+')
				sec += second;
			else if (ops == '-')
				sec -= second;

			return ConvertTime_tToTimeString(sec);
		}
	}
}