时间戳和时间字符串互转

 

#include 
#include 
#include 
using namespace std;

// 时间字符串转时间戳
time_t TimeStringToTimestamp(string strTime)
{
	struct tm tmTime;

	sscanf(strTime.c_str(), "%4d-%2d-%2d %2d:%2d:%2d",
		&tmTime.tm_year,
		&tmTime.tm_mon,
		&tmTime.tm_mday,
		&tmTime.tm_hour,
		&tmTime.tm_min,
		&tmTime.tm_sec
	);

	tmTime.tm_year -= 1900;
	tmTime.tm_mon--;
	tmTime.tm_isdst = -1;

	return mktime(&tmTime);
}

// 时间戳转时间字符串
string TimestampToTimeString(time_t time)
{
	struct tm* tmTime = localtime(&time);
	char szTime[128] = { 0 };
	strftime(szTime, sizeof(szTime), "%Y-%m-%d %H:%M:%S", tmTime);		
	
	return szTime;
}

// 去除秒
void EraseSecond(time_t& time)
{
	struct tm struTime;
	localtime_s(&struTime, &time);
	struTime.tm_sec = 0;
	time = mktime(&struTime);
}

// 比较24小时部分的大小
int CompareDayTime(time_t time1, time_t time2)
{
	struct tm tm1, tm2;
	localtime_s(&tm1, &time1);
	localtime_s(&tm2, &time2);

	if (tm1.tm_hour > tm2.tm_hour)
	{
		return 1;
	}
	else if (tm1.tm_hour < tm2.tm_hour)
	{
		return -1;
	}

	if (tm1.tm_min > tm2.tm_min)
	{
		return 1;
	}
	else if (tm1.tm_min < tm2.tm_min)
	{
		return -1;
	}

	if (tm1.tm_sec > tm2.tm_sec)
	{
		return 1;
	}
	else if (tm1.tm_sec < tm2.tm_sec)
	{
		return -1;
	}

	return 0;
}