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ISO8601和UTC 时间，由秒数转化日期时间，日期到秒数
ISO8601时间格式：2018-6-5T17:46:50Z
UTC时间格式: 2018-06-05T03:46:50+08:00 等同于2018-6-5T11:46:50Z
UTC+时区= localtime；
其中"T"用来分割日期和时间，时间后面跟着的"-07:00"表示西七区，"+08:00"表示东八区。
时区默认是0时区，可以用"Z"表示，也可以不写。
对于我国，要使用"+08:00"，表示东八区。
#include#include #ifdef WIN32#include #define snprintf sprintf_s#else#include #endiftypedef struct dataTime_t{ uint16_t wYear; uint16_t wMonth; uint16_t wDayOfWeek; uint16_t wDay; uint16_t wHour; uint16_t wMinute; uint16_t wSecond; uint16_t wMilliseconds;}dataTime_t; /**获取系统ISO8601时间，字符串表示*/ int GetDataTime_ISO8601(char * data, int size){ time_t time_utc; struct tm tm_local; time(&time_utc);#ifdef WIN32 localtime_s(&tm_local, &time_utc);#else localtime_r(&time_utc, &tm_local);#endif int success = 0; success = snprintf(data, size, "%04d-%02d-%02dT%02d:%02d:%02dZ", tm_local.tm_year + 1900, tm_local.tm_mon + 1, tm_local.tm_mday, tm_local.tm_hour, tm_local.tm_min, tm_local.tm_sec); return success;}/**获取时区*/ int GetTimeZone(int &nTimeZone){ struct tm tm_local; time_t time_utc; // Get the UTC time time(&time_utc); //当前时间的秒数 // Get the local time // Use localtime_r for threads safe#ifdef WIN32 localtime_s(&tm_local, &time_utc);#else localtime_r(&time_utc, &tm_local);#endif time_t time_local; // Change tm to time_t time_local = mktime(&tm_local); struct tm tm_gmt; // Change it to GMT tm#ifdef WIN32 gmtime_s(&tm_gmt, &time_utc);#else gmtime_r(&time_utc, &tm_gmt);;#endif int time_zone = tm_local.tm_hour - tm_gmt.tm_hour; if (time_zone < -12) { time_zone += 24; }else if (time_zone > 12) { time_zone -= 24; } nTimeZone = time_zone; return time_zone;}/**ISO8601或者UTC格式的时间，将字符串时间转换为 dataTime_t对象*/int GetDataTime_ISO8601_UTC_DataTime(const char * lpStringdata, int nStringSize, dateTime_t *lpDataTime){ int lsuccess = 0; //2018-06-01T08:32:56.000Z /2018-06-01T08:32:56Z int lTimeZone = 0; if (lpStringdata == NULL || nStringSize < 20 ) return -1; char * lpSource = (char *)lpStringdata; char lpdate[6] = { 0 }; strncpy(lpdate, lpSource, 4); lpdate[4] = '\0'; lpDataTime->wYear = atoi(lpdate); char *llpSource = lpSource + 5; if (llpSource==NULL) return -1; strncpy(lpdate, llpSource, 2); lpdate[2] = '\0'; lpDataTime->wMonth = atoi(lpdate); llpSource = llpSource + 3; if (llpSource == NULL) return -1; strncpy(lpdate, llpSource, 2); lpdate[2] = '\0'; lpDataTime->wDay = atoi(lpdate); llpSource = llpSource + 3; if (llpSource == NULL) return -1; strncpy(lpdate, llpSource, 2); lpdate[2] = '\0'; lpDataTime->wHour = atoi(lpdate); llpSource = llpSource + 3; if (llpSource == NULL) return -1; strncpy(lpdate, llpSource, 2); lpdate[2] = '\0'; lpDataTime->wMinute = atoi(lpdate); llpSource = llpSource + 3; if (llpSource == NULL) return -1; strncpy(lpdate, llpSource, 2); lpdate[2] = '\0'; lpDataTime->wSecond = atoi(lpdate);/** 2018-06-01T08:32:56Z* 2018-06-01T08:32:56+08:00* 2018-06-01T08:32:56.000Z* 2018-06-01T08:32:56.000+08:00*/ llpSource = llpSource + 2; if (llpSource == NULL) return -1; strncpy(lpdate, llpSource, 1); lpdate[1] = '\0'; if (strcmp(lpdate, ".") == 0) { char *lpbuffer = llpSource + 1; if (lpbuffer == NULL) return -1; char buffer[4] = { 0 }; strncpy(buffer, lpbuffer, 3); buffer[3] = '\0'; lpDataTime->wMilliseconds = atoi(buffer); char * lptime = lpbuffer + 3; char buf[6] = { 0 }; if (lptime == NULL) return -1; strncpy(buf, lptime, 1); buf[1] = '\0'; if (strcmp(buf, "+") == 0) { lptime = lptime + 1; if (lptime == NULL) return -1; strncpy(buf, lptime, 2); buf[2] = '\0'; lTimeZone = atoi(buf); } } if (strcmp(lpdate, "+") == 0) { llpSource = llpSource + 1; if (llpSource == NULL) return -1; strncpy(lpdate, llpSource, 2); lpdate[2] = '\0'; lTimeZone = atoi(lpdate); } printf("time : %4d/%d/%d %2d:%d:%d.%3d + %d:00", lpDataTime->wYear, lpDataTime->wMonth, lpDataTime->wDay, lpDataTime->wHour, lpDataTime->wMinute, lpDataTime->wSecond,lpDataTime->wMilliseconds,lTimeZone);/ return lsuccess;}/** 得到系统时间*/int GetLocalTime(dateTime_t *lpDateTime){ int32_t lsuccess = 0;#ifdef WIN32 SYSTEMTIME *lpSystemTime = (SYSTEMTIME *)lpDataTime; GetLocalTime(lpSystemTime);#else struct timeval nowTime = { 0 }; lsuccess = gettimeofday(&nowTime, 0); time_t time = (time_t)nowTime.tv_sec; struct tm ntm, *ptm = &ntm; localtime_r(&time, &ntm); lpDataTime->wYear = ptm->tm_year + 1900; lpDataTime->wMonth = ptm->tm_mon + 1; lpDataTime->wDayOfWeek = ptm->tm_wday; lpDataTime->wDay = ptm->tm_mday; lpDataTime->wHour = ptm->tm_hour; lpDataTime->wMinute = ptm->tm_min; lpDataTime->wSecond = ptm->tm_sec; lpDataTime->wMilliseconds = nowTime.tv_usec / 1000;#endif return lsuccess;}/** 设置系统时间*/int SetLocalTime(dateTime_t *lpDateTime){ int32_t lsuccess = 0;#ifdef WIN32 SYSTEMTIME *lpSystemTime = (SYSTEMTIME *)lpDataTime; lsuccess = SetLocalTime(lpSystemTime);#else struct tm _tm = { 0 }; _tm.tm_sec = lpDataTime->wSecond; _tm.tm_min = lpDataTime->wMinute; _tm.tm_hour = lpDataTime->wHour; _tm.tm_mday = lpDataTime->wDay; _tm.tm_mon = lpDataTime->wMonth -1; _tm.tm_year = lpDataTime->wYear - 1900; struct timeval tv; tv.tv_sec = mktime(&_tm); tv.tv_usec = 0; if (settimeofday(&tv, (struct timezone *) 0) < 0) { printf("Set system datetime error!\n"); return -1; }#endif return lsuccess;}/** 设置系统时间*/ int SetLocalTimeAddTZ(dateTime_t *lpDateTime, int ltimezone){ int32_t lsuccess = 0; int llSecond = ltimezone * 3600; struct tm _tm = { 0 }; _tm.tm_sec = lpDataTime->wSecond; _tm.tm_min = lpDataTime->wMinute; _tm.tm_hour = lpDataTime->wHour; _tm.tm_mday = lpDataTime->wDay; _tm.tm_mon = lpDataTime->wMonth -1; _tm.tm_year = lpDataTime->wYear - 1900; time_t timeSeconds = mktime(&_tm); time_t CountSecond = timeSeconds + llSecond;#ifdef WIN32 struct tm timer, *time = &timer; localtime_s(time,&CountSecond); lpDataTime->wYear = time->tm_year + 1900; lpDataTime->wMonth = time->tm_mon +1; lpDataTime->wDayOfWeek = time->tm_wday; lpDataTime->wDay = time->tm_mday; lpDataTime->wHour = time->tm_hour; lpDataTime->wMinute = time->tm_min; lpDataTime->wSecond = time->tm_sec; SYSTEMTIME *lpSystemTime = (SYSTEMTIME *)lpDataTime; avx_success = SetLocalTime(lpSystemTime); printf("Time+TZ: %4d/%d/%d %2d:%d:%d\n", lpSystemTime->wYear, lpSystemTime->wMonth, lpSystemTime->wDay, lpSystemTime->wHour, lpSystemTime->wMinute, lpSystemTime->wSecond);#else struct timeval tv; tv.tv_sec = CountSecond; tv.tv_usec = 0; if (settimeofday(&tv, (struct timezone *) 0) < 0) { printf("Set system datatime error!\n"); return -1; }#endif return lsuccess;}/** function :get current time * out : Seconds/Millisecond*/int64_t SKY_GetUTCTime(){ struct timeval tv; gettimeofday(&tv, NULL); return (int64_t)tv.tv_sec * 1000000 + tv.tv_usec;}/** input :Seconds/Millisecond* out : date struct(yyyy/mm/dd hh/mm/ss)*/int SKY_GetDataTimeFromUTCTime(int64_t llUTCTime,dataTime_t *lpDataTime){ struct tm timer, *time = &timer; int64_t llUTCTimeSecond = llUTCTime / 1000000; int64_t llUTCTimeMicros = llUTCTime % 1000000;#ifdef _WIN32 localtime_s(time,(time_t*)&llUTCTimeSecond);#else localtime_r((time_t*)&llUTCTimeSecond,time);#endif lpDataTime->wYear = time->tm_year + 1900; lpDataTime->wMonth = time->tm_mon + 1; lpDataTime->wDayOfWeek = time->tm_wday; lpDataTime->wDay = time->tm_mday; lpDataTime->wHour = time->tm_hour; lpDataTime->wMinute = time->tm_min; lpDataTime->wSecond = time->tm_sec; lpDataTime->wMilliseconds = llUTCTimeMicros / 1000; return 0;}/** input :date struct(yyyy/mm/dd hh/mm/ss)* out : Seconds/Millisecond*/int64_t SKY_GetUTCTimeFromDataTime(dataTime_t *lpDataTime){ struct tm _tm = { 0 }; _tm.tm_sec = lpDataTime->wSecond; _tm.tm_min = lpDataTime->wMinute; _tm.tm_hour = lpDataTime->wHour; _tm.tm_mday = lpDataTime->wDay; _tm.tm_mon = lpDataTime->wMonth - 1; _tm.tm_year = lpDataTime->wYear - 1900;// time_t llUTCTimeSecond = mktime(&_tm); //此处在不同平台可能会出现异常 int64_t llUTCTimeSecond = mktime(&_tm); int64_t llUTCTimeMicros = lpDataTime->wMilliseconds * 1000; int64_t llUTCTime = llUTCTimeSecond * 1000000 + llUTCTimeMicros; return llUTCTime;}
在项目过程中涉及到时间操作相关的细节问题，现在将常用的方法整理出来，方便大家借鉴，同时发现问题，请积极提出。
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