C++ boost 时间与日期 C++ boost 时间与日期处理仔细讲解

#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)? "Yes":"no")<<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; 
} 

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