C++ time_t与string之间转换的工具类

来源：互联网发布：js aaencode 编辑：程序博客网时间：2024/06/06 02:39

之前在做项目的时候遇到了这个需求，当然baidu到了这个工具类一直忘了分享，现在补上分享，但是出处忘了，如果有博友知道出处，我到时候再补充上。

工具类支持两种格式一种精确到日，一种精确到秒，如果有其他需求可以自己修改方法的实现。

#include <string>#include <sys/time.h>/*    string to time_t    时间格式  2009-3-24*/class Convert_between_string_time_t{public :    static  int API_StringToTime(const std::string &strDateStr,time_t &timeData)    {        char *pBeginPos = (char*) strDateStr.c_str();        char *pPos = strstr(pBeginPos,"-");        if(pPos == NULL)        {            return -1;        }        int iYear = atoi(pBeginPos);        int iMonth = atoi(pPos + 1);        pPos = strstr(pPos + 1,"-");        if(pPos == NULL)        {            return -1;        }        int iDay = atoi(pPos + 1);        struct tm sourcedate;        memset((void*)&sourcedate,0,sizeof(sourcedate));        sourcedate.tm_mday = iDay;        sourcedate.tm_mon = iMonth - 1;        sourcedate.tm_year = iYear - 1900;        timeData = mktime(&sourcedate);        return 0;    };    /*        time_t to string    */    static int API_TimeToString(std::string &strDateStr,const time_t &timeData)    {        char chTmp[15];        memset(chTmp,0,sizeof(chTmp));        struct tm *p;        p = localtime(&timeData);        p->tm_year = p->tm_year + 1900;        p->tm_mon = p->tm_mon + 1;        snprintf(chTmp,sizeof(chTmp),"%04d-%02d-%02d",                 p->tm_year, p->tm_mon, p->tm_mday);        strDateStr = chTmp;        return 0;    };//    struct tm//    {//        int tm_sec;//        int tm_min;//        int tm_hour;//        int tm_mday;//        int tm_mon;//        int tm_year;//        int tm_wday;//        int tm_yday;//        int tm_isdst;//    };//int tm_sec 代表目前秒数，正常范围为0-59，但允许至61秒//int tm_min 代表目前分数，范围0-59//int tm_hour 从午夜算起的时数，范围为0-23//int tm_mday 目前月份的日数，范围01-31//int tm_mon 代表目前月份，从一月算起，范围从0-11//int tm_year 从1900 年算起至今的年数//int tm_wday 一星期的日数，从星期一算起，范围为0-6//int tm_yday 从今年1月1日算起至今的天数，范围为0-365//int tm_isdst 日光节约时间的旗标    /*    string to time_t    时间格式 2009-3-24 0:00:08 或 2009-3-24    */    static int API_StringToTimeEX(const std::string &strDateStr,time_t &timeData)    {        char *pBeginPos = (char*) strDateStr.c_str();        char *pPos = strstr(pBeginPos,"-");        if(pPos == NULL)        {            printf("strDateStr[%s] err \n", strDateStr.c_str());            return -1;        }        int iYear = atoi(pBeginPos);        int iMonth = atoi(pPos + 1);        pPos = strstr(pPos + 1,"-");        if(pPos == NULL)        {            printf("strDateStr[%s] err \n", strDateStr.c_str());            return -1;        }        int iDay = atoi(pPos + 1);        int iHour=0;        int iMin=0;        int iSec=0;        pPos = strstr(pPos + 1," ");        //为了兼容有些没精确到时分秒的        if(pPos != NULL)        {            iHour=atoi(pPos + 1);            pPos = strstr(pPos + 1,":");            if(pPos != NULL)            {                iMin=atoi(pPos + 1);                pPos = strstr(pPos + 1,":");                if(pPos != NULL)                {                    iSec=atoi(pPos + 1);                }            }        }        struct tm sourcedate;        memset((void*)&sourcedate,0,sizeof(sourcedate));        sourcedate.tm_sec = iSec;        sourcedate.tm_min = iMin;        sourcedate.tm_hour = iHour;        sourcedate.tm_mday = iDay;        sourcedate.tm_mon = iMonth - 1;        sourcedate.tm_year = iYear - 1900;        timeData = mktime(&sourcedate);        return 0;    }    /*       time_t to string 时间格式 2009-3-24 0:00:08       */    static int API_TimeToStringEX(std::string &strDateStr,const time_t &timeData)    {        char chTmp[100];        memset(chTmp,0,sizeof(chTmp));        struct tm *p;        p = localtime(&timeData);        p->tm_year = p->tm_year + 1900;        p->tm_mon = p->tm_mon + 1;        snprintf(chTmp,sizeof(chTmp),"%04d-%02d-%02d %02d:%02d:%02d",                 p->tm_year, p->tm_mon, p->tm_mday,p->tm_hour,p->tm_min,p->tm_sec);        strDateStr = chTmp;        return 0;    }};

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