时间格式转换（时间戳与字符串之间转换）

看代码：

#include <stdio.h>
#include <time.h>

char s[100];

time_t StringToDatetime (const char *strTime)  
{  
    if (NULL == strTime)  
    {  
        return 0;  
    }  
    tm tm_;  
    int year, month, day, hour, minute,second;  
    sscanf(strTime,"%d-%d-%dT%d:%d:%d", &year, &month, &day, &hour, &minute, &second);  
    tm_.tm_year  = year-1900;  
    tm_.tm_mon   = month-1;  
    tm_.tm_mday  = day;  
    tm_.tm_hour  = hour;  
    tm_.tm_min   = minute;  
    tm_.tm_sec   = second;  
    tm_.tm_isdst = 0;  
  
    time_t t_ = mktime(&tm_); //已经减了8个时区  
    return t_; //秒时间  
}

void DatetimeToString (time_t time)
{
    time_t t = time + 28800;//8h 时区差
    struct tm *p;
    p = gmtime(&t);
    strftime(s, sizeof(s), "%Y-%m-%dT%H:%M:%S", p);
}

int main(int argc, const char * argv[])
{
    time_t t;
    t=1479794342;//s
    DatetimeToString(t);
    printf("%lld: %s
", t, s);
    printf("%s", ctime(&t));
    time_t t2 = t + 28800;
    printf("%s", asctime(gmtime(&t2)));
    printf("%s: %lld
", s, StringToDatetime(s));

    return 0;
} 

可以在下面网址进行测试：http://tool.chinaz.com/Tools/unixtime.aspx