boost 时间与日期处理
导视：
| 类 | 特点 | 缺点 | 说明 |
| timer | 计时基类 | 不适合大跨度时间 | 适用大部分的普通计时 |
| progress_timer | 继承自timer 可以自动写入流中 | 只精确到0.01s | 如果需要更精确，可派生个类，调用stream的precision设置 |
| progress_display | 图形化显示进度 | 只能输出到cout | 如果还有其他输出则会干扰进度显示。 折中的办法是重新显示 pd.restart(size); pd+= pNum; |
| date | 日期结构，时间点 | —— | date是date_time库的核心类 boost::gregorian |
| date_duration | days、months、years 时间段 | —— | 表示一段时间，可以把它看成一个int |
| date_period | 标量，左开右闭，时间区间 | —— | 可以认为是一个有起点的date_duration。能做交集、并集 |
| date_iterator | 迭代器，以某个单位增减 | —— | 天、周、月、年四种迭代器，以某种增量移动。 |
| time_duration | 时间段 同date_duration | —— | hours、minutes、seconds、millisec、boost::posix_time |
| ptime | 时间点 date+time_duration | —— | 分date()和time_of_day()操作。 |
| time_period | 时间区间 同date_period | —— | —— |
| time_iterator | 迭代器，以某个单位增减 | —— | 可直接与ptime比较 |
| date_facet | 流格式化日期 | —— | %Y年%m月%d日 |
| time_facet | 流格式化时间 | —— | %Y年%m月%d日 %H点%M分%S%F秒 |
#include <boost/timer.hpp> #include <boost/progress.hpp> #include <iostream> #include <sstream> #include <fstream> #include <string> #include <vector> #include <Windows.h> #include <boost/date_time/gregorian/gregorian.hpp> #include <boost/date_time/posix_time/posix_time.hpp> using namespace std; int main() { boost::timer t; std::cout<<"Max "<<t.elapsed_max()<<endl; std::cout<<"Min "<<t.elapsed_min()<<endl; std::cout<<"elapsed: "<<t.elapsed()<<endl; t.restart(); Sleep(100); std::cout<<"elapsed: "<<t.elapsed()<<endl; cout<<"---------------------------"<<endl; stringstream ss; { boost::progress_timer t(ss); Sleep(300); } cout<<ss.str(); cout<<"---------------------------"<<endl; vector<string> v(100); //Do Data Fill...... ofstream fs("c:test.txt"); boost::progress_display pd(v.size()); vector<string>::iterator pos; for (pos = v.begin();pos != v.end();++pos) { fs<<*pos<<endl; Sleep(10); ++pd; //pd.restart(v.size()); //pd+=(pos-v.begin() +1); } cout<<"---------------------------"<<endl; { using namespace boost::gregorian; cout<<"----------------- date ------------------"<<endl; date d1; date d2(2013,4,7); date d3(2013,Apr,7); date d4(d2); assert(d1 == date(not_a_date_time)); //默认初始化为无效日期 assert(d2 == d4); assert(d3 == d2); d1 = from_string("1999,9,9"); date d5 (from_string("2008/8/8")); d3 = from_undelimited_string("20110111"); cout<<day_clock::local_day()<<endl; cout<<day_clock::universal_day()<<endl; date d6 (neg_infin); date d7(pos_infin); cout<<d6<<endl; cout<<d7<<endl; cout<<"---------------------------"<<endl; date today (2013,4,17); assert(today.year() == 2013); assert(today.month() == 4); assert(today.day() == 17); date::ymd_type ymd = today.year_month_day(); assert(ymd.year == 2013); assert(ymd.month == 4); assert(ymd.day == 17); assert(today.day_of_week() == 3); //星期几 周日为0 cout<<today.day_of_year()<<endl; //在一年中是第几天 assert(today.end_of_month() == date(2013,4,30)); //当月的最后一天 cout<<today.week_number()<<endl; //当年的第几周 范围0~53 年初的半周归为上一年，即53 assert(d6.is_infinity()); //日期为无限日期 assert(d6.is_neg_infinity()); cout<<"---------------------------"<<endl; cout<<to_simple_string(today)<<endl; cout<<to_iso_string(today)<<endl; cout<<to_iso_extended_string(today)<<endl; //常用日期格式YYYY-MM-DD cout<<today<<endl; cout<<"---------------------------"<<endl; tm t = to_tm(today); assert(t.tm_hour == 0 && t.tm_min == 0); date new_today = date_from_tm(t); //从tm转为date assert(new_today == today); cout<<"-------------- days(date_duration) --------------"<<endl; days dd1(10),dd2(-20),dd3(365); assert(dd1>dd2 &&dd1<dd3); assert(dd1+dd2 == days(-10)); assert((dd2+dd3).days() == 345); assert(dd3/5 == days(73)); weeks w(3); //3个星期 assert(w.days() == 21); months m(5); years y(2); months m2 = y+m; assert(m2.number_of_months() == 29); assert((y*2).number_of_years() == 4); cout<<"-------------- Calc --------------"<<endl; date dA(2000,1,1),dB(2008,8,8); cout<<dB-dA<<endl; //3142天 dA+=days(10); assert(dA.day() == 11); dA+=months(2); assert(dA.month() ==3 && dA.day()== 11); dA-=weeks(1); assert(dA.day() == 4); dB-=years(7); assert(dA.year() == dB.year()-1); //如果日期是月末的最后一天，加减月或年会得到月末的时间，而不是简单的月、年加1 date sp(2013,3,30); sp-=months(1); assert(sp.month() == 2 && sp.day() == 28); sp -=months(1); assert(sp.month()== 1 && sp.day()== 31); sp+=months(2); assert(sp.day() == 31); //与原来的日期已经不相等！ cout<<"-------------- date_period --------------"<<endl; date_period dp(date(2013,4,17),days(14)); //左开右闭与STL的容器相似 assert(!dp.is_null()); assert(dp.begin().day() == 17); assert(dp.last().day() == 30); assert(dp.end().day() == 1); cout<<dp<<endl; date_period new_dp = dp; new_dp.shift(days(3)); //将时间区间向后移动 assert(new_dp.begin().day() == 20); assert(new_dp.length().days() == 14); new_dp.expand(days(3)); //区间两段延长n天，即延长2n天。 assert(new_dp.begin().day() == 17); assert(new_dp.length().days() == 20); assert(dp.is_after(date(2013,1,1))); assert(dp.contains(date(2013,4,20))); date_period dp2 (date(2013,4,17),days(5)); assert(dp.contains(dp2)); assert(dp.intersects(dp2)); //交集 assert(dp.intersection(dp2) == dp2); date_period dp3 (date(2013,5,1),days(5)); assert(!dp3.intersects(dp)); assert(dp3.intersection(dp2).is_null()); assert(dp.is_adjacent(dp3)); date_period dp4(date(2013,4,17),days(19)); //并集 assert(dp.merge(dp3).is_null()); //无交集返回空 assert(dp.span(dp3) == dp4); //填充中间区域 cout<<"-------------- date_iterator --------------"<<endl; date last(2013,4,17); day_iterator d_iter(last); //日期迭代器 assert(d_iter == last); ++d_iter; assert(d_iter == date(2013,4,18)); year_iterator y_iter(*d_iter,3); //增减步长为3 assert(y_iter == last + days(1)); ++y_iter; assert(y_iter->year() == 2016); cout<<"-------------- func --------------"<<endl; cout<<(gregorian_calendar::is_leap_year(2000)")<<endl; //闰年 assert(gregorian_calendar::end_of_month_day(2013,2) == 28); //月末天 } { using namespace boost::posix_time; cout<<"-------------- time_duration --------------"<<endl; time_duration td(1,1,1); //时、分、秒 会自动借、进位 hours h0(1); minutes m(1); seconds s(1); millisec ms(1); time_duration td2 = h0+m+s+ms; time_duration td3 = hours(2) + minutes(10); time_duration td4 = duration_from_string("1:10:10:300"); assert(td4.hours() == 1 && td4.minutes() == 10 && td4.seconds() == 10); assert(td.total_seconds() == 1*3600 + 1*60 +1); //转为sec hours h(-10); assert(h.is_negative()); time_duration h2 = h.invert_sign(); //取反 assert(!h2.is_negative() && h2.hours() == 10); cout<<td3-td2<<endl; cout<<to_simple_string(td4)<<endl; cout<<to_iso_string(td4)<<endl; cout<<"-------------- ptime --------------"<<endl; { using namespace boost::gregorian; ptime p(date(2013,4,17),hours(1)); //ptime相当于date+time_duration ptime p1 = time_from_string("2013-4-17 16:25:00"); cout<<p<<endl; cout<<p1<<endl; ptime p2 = second_clock::local_time(); //常用时间输出 ptime p3 = microsec_clock::universal_time(); //微秒精度 cout<<p2<<endl<<p3<<endl; ptime op(date(2013,4,17),hours(1)+minutes(30)); date d = op.date(); time_duration optd = op.time_of_day(); assert(d.day() == 17 && d.month() == 4); assert(optd.hours() == 1 && optd.minutes() == 30); cout<<to_iso_extended_string(op)<<endl; tm t = to_tm(op); //不可逆，此处与date不同 //只能用date_from_tm先得到日期，再填充时间。 cout<<"-------------- time_period --------------"<<endl; time_period tp1 (op,hours(8)); time_period tp2(op+hours(8),hours(1)); assert(tp1.end() == tp2.begin() && tp1.is_adjacent(tp2)); assert(!tp1.intersects(tp2)); tp1.shift(hours(1)); assert(tp1.is_after(op)); assert(tp1.intersects(tp2)); tp2.expand(hours(10)); assert(tp2.contains(op) && tp2.contains(tp1)); cout<<"-------------- time_iterator --------------"<<endl; for (time_iterator t_iter(op,minutes(10));t_iter<op+hours(1);++t_iter) { cout<<*t_iter<<endl; } cout<<"-------------- formate --------------"<<endl; date_facet* dfacet = new date_facet("%Y 年%m 月%d 日"); cout.imbue(locale(cout.getloc(),dfacet)); cout<<date(2013,4,17)<<endl; time_facet* tfacet = new time_facet("%Y 年%m 月%d 日 %H点%M分%S%F秒"); cout.imbue(locale(cout.getloc(),tfacet)); cout<<op<<endl; } } getchar(); return 0; } 运行结果：
Max 2.14748e+006 Min 0.001 elapsed: 0.001 elapsed: 0.1 --------------------------- 0.30 s --------------------------- 0% 10 20 30 40 50 60 70 80 90 100% |----|----|----|----|----|----|----|----|----|----| *************************************************** --------------------------- ----------------- date ------------------ 2013-Apr-17 2013-Apr-17 -infinity +infinity --------------------------- 107 16 --------------------------- 2013-Apr-17 20130417 2013-04-17 2013-Apr-17 --------------------------- -------------- days(date_duration) -------------- -------------- Calc -------------- 3142 -------------- date_period -------------- [2013-Apr-17/2013-Apr-30] -------------- date_iterator -------------- -------------- func -------------- Yes -------------- time_duration -------------- 01:08:58.999000 01:10:10.300000 011010.300000 -------------- ptime -------------- 2013-Apr-17 01:00:00 2013-Apr-17 16:25:00 2013-Apr-17 17:19:21 2013-Apr-17 09:19:21.870604 2013-04-17T01:30:00 -------------- time_period -------------- -------------- time_iterator -------------- 2013-Apr-17 01:30:00 2013-Apr-17 01:40:00 2013-Apr-17 01:50:00 2013-Apr-17 02:00:00 2013-Apr-17 02:10:00 2013-Apr-17 02:20:00 -------------- formate -------------- 2013 年04 月17 日 2013 年04 月17 日 01点30分00秒
感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！
【C++ boost 时间与日期处理详细介绍】相关文章：
★ char str[] 与 char *str的区别详细解析