time_t 与字符串之间的相互转换

来源：互联网发布：js 获取子字符串编辑：程序博客网时间：2024/06/01 09:11

在linux下，时间格式是time_t,输出时用%lu才能打印输出。

拼接字符串的时候我们会遇到麻烦，所以要转换字符串。

方法1， SYSTEMTIME 类型

//指定time_t类型的时间，格式化为YYYYMMDDHH24MISS型的字符串
void FormatTime(SYSTEMTIME &tm1)
{
TCHAR * szTime = new TCHAR[128];
GetLocalTime(&tm1);
_stprintf( szTime, _T("%4.4d-%2.2d-%2.2d %2.2d:%2.2d:%2.2d"),

tm1.wYear, tm1.wMonth+1, tm1.wDay,
tm1.wHour, tm1.wMinute,tm1.wSecond);

delete szTime;
szTime = NULL;
}

//指定YYYYMMDDHH24MISS型的时间，格式化为time_t型的时间
SYSTEMTIME FormatTime2(TCHAR * szTime)
{
SYSTEMTIME tm1;
_stscanf( szTime, _T("%4d-%2d-%2d %2d:%2d:%2d"),
    &tm1.wYear,
    &tm1.wMonth,
    &tm1.wDay,
    &tm1.wHour,
    &tm1.wMinute,
    &tm1.wSecond );
    return time1;
}

方法2， time_t类型
//指定time_t类型的时间，格式化为YYYYMMDDHH24MISS型的字符串
void FormatTime(time_t time1, char *szTime)
{
struct tm tm1;

#ifdef WIN32
    tm1 = *localtime(&time1);
#else
    localtime_r(&time1, &tm1 );
#endif
    sprintf( szTime, "%4.4d%2.2d%2.2d%2.2d%2.2d%2.2d",
           tm1.tm_year+1900, tm1.tm_mon+1, tm1.tm_mday,
             tm1.tm_hour, tm1.tm_min,tm1.tm_sec);
}

//指定YYYYMMDDHH24MISS型的时间，格式化为time_t型的时间
time_t FormatTime2(char * szTime)
{
struct tm tm1;
time_t time1;

    sscanf(szTime, "%4d%2d%2d%2d%2d%2d",
          &tm1.tm_year,
          &tm1.tm_mon,
          &tm1.tm_mday,
          &tm1.tm_hour,
          &tm1.tm_min,
          &tm1.tm_sec);

    tm1.tm_year -= 1900;
     tm1.tm_mon --;

    tm1.tm_isdst=-1;

    time1 = mktime(&tm1);
    return time1;
}

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