countdays.java

宾馆管理系统

package hotel2;

public class Countdays{


      private int total=0;

      public Countdays(String indate,String outdate)
         {
              //System.out.println("\nhahahahaha");
              mission(indate,outdate);
         }

      public boolean isleapyear(int year)//判断闰年
        {
          if(year%4==0) return true;
          else
              return false;
         }

      public int yeardays(int a,int b)
       {
         int yeardays=0;
         a++;
         while(a<b)
         {
           if(isleapyear(a))
             yeardays=yeardays+366;
           else
             yeardays=yeardays+365;
             a++;
         }
         return yeardays;
       }

      public int judge_february(int year)//返回二月的天数
         {
           if(isleapyear(year))
              return 29;
           else
              return 28;
         }


      public int toyearbeginning(int year,int month,int day)//返回当前月月末到年初的天数
       {


          switch(month-1)
         {
          case 0:return day;
          case 1:return 31+day;
          case 2:
              return 31+judge_february( year)+day;
          case 3:
              return 62+judge_february( year)+day;
          case 4:
              return 92+judge_february( year)+day;
          case 5:
              return 123+judge_february( year)+day;
          case 6:
              return 153+judge_february( year)+day;
          case 7:
              return 184+judge_february( year)+day;
          case 8:
              return 215+judge_february( year)+day;
          case 9:
              return 245+judge_february( year)+day;
          case 10:
              return 276+judge_february( year)+day;
          case 11:
              return 306+judge_february( year)+day;
          case 12:
              return 337+judge_february( year)+day;
          default:return 0;
       }


      }
        public int toyearend(int year,int month,int day)//算上当前天
        {

                if(isleapyear(year))
                   return 366-toyearbeginning(year,month,day)+1;
                else
                   return 365-toyearbeginning(year,month,day)+1;

        }



      public void compute_total(int yeara,int yearb,int montha,int monthb,int daya,int dayb)
        {
                if(yeara!=yearb)
                   total=yeardays(yeara,yearb)+toyearbeginning(yearb,monthb,dayb)+toyearend(yeara,montha,daya);
                else
                   total=toyearbeginning(yearb,monthb,dayb)-toyearbeginning(yeara,montha,daya)+1;//算上当前天
         }

      public int getdays()
          {
            return total;
          }

      public void mission(String a,String b)
          {
            int yeara;
            int yearb;
            int montha;
            int monthb;
            int daya;
            int dayb;

            yeara=Integer.parseInt(a.substring(0,4));
            yearb=Integer.parseInt(b.substring(0,4));


            montha=Integer.parseInt(getmonstr(a));
            monthb=Integer.parseInt(getmonstr(b));



            daya=Integer.parseInt(getdaystr(a));
            dayb=Integer.parseInt(getdaystr(b));



            compute_total(yeara,yearb,montha,monthb,daya,dayb);
           }

      public String getmonstr(String t)
           {
             if(!t.substring(6,7).equals("-"))
               return t.substring(5,7);

             else
                return t.substring(5,6);
           }

      public String getdaystr(String t)
           {
             int i=t.length()-1;


             while(t.charAt(i)!='-')
               i--;



             return t.substring(i+1,t.length());
            }
}