UTC时间转本地日期时间的实现

来源：互联网发布：国密算法性能测试编辑：程序博客网时间：2024/05/19 14:38

根据时区，把UTC时间转换为本地时间。很简单，看代码吧

struct DATETIME{uint16 year;uint8 month;uint8 day;uint8 hours;uint8 minute;uint8 seconds;uint8 microsecond;DATETIME(){clear();}void clear(){year = 1970;month = 1;day = 1;hours = 0;minute = 0;seconds = 0;microsecond = 0;}/*!< 根据指定时区转为当前日期和时间。Ex: 转为北京时间 -> transToLocal(8)*/void transToLocal(int8 timezone){uint8 nLastDayOfMonth = 0;//每个月的最后一天if(timezone == 0){return;}hours += timezone;if (hours > 23){hours -= 24;day++;switch (month){case 1:case 3:case 5:case 7:case 8:case 10:case 12:nLastDayOfMonth = 31;break;case 2:if (((0 == year % 4) && (0 != year % 100)) || (0 == year % 400)){/*!< 闰年的2月有29天*/nLastDayOfMonth = 29;}else{nLastDayOfMonth = 28;}break;case 4:case 6:case 9:case 11:nLastDayOfMonth = 30;break;default:return;}if (day > nLastDayOfMonth){day = 1;if(month == 12){month = 1;year++;}else{month++;}}}else if(hours < 0){hours += 24;if(day == 1){switch (month){case 1:/*!< 处理1月1日*/day = 31;month = 12;year--;return;case 3:case 5:case 7:case 8:case 10:case 12:nLastDayOfMonth = 31;break;case 2:if (((0 == year % 4) && (0 != year % 100)) || (0 == year % 400)){nLastDayOfMonth = 29;}else{nLastDayOfMonth = 28;}break;case 4:case 6:case 9:case 11:nLastDayOfMonth = 30;break;default:return;}month--;day = nLastDayOfMonth;}else{day--;}}}};

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