JAVA date A time period of a total of several weeks, each day of the week

/*** Query The total number of weeks of a time period and the current time of the query is the week *@paramStart *@paramEnd *@return     */    Private int[] Selectweeknum (Date start,date end,intWeekintflag) {Java.util.Calendar now=java.util.Calendar.getInstance (); Java.util.Calendar C_total=java.util.Calendar.getInstance (); Java.util.Calendar C_begin=java.util.Calendar.getInstance (); Java.util.Calendar C_end=java.util.Calendar.getInstance (); intCount = 0; intWeektotal = 0; Try{c_begin.settime (start);            C_end.settime (end); Now.settime (NewSimpleDateFormat ("Yyyy-mm-dd"). Parse (Sdf.format (NewDate ()))); intBegin =C_begin.get (Java.util.Calendar.WEEK_OF_YEAR); intover =C_end.get (Java.util.Calendar.WEEK_OF_YEAR); intz =Now.get (Java.util.Calendar.WEEK_OF_YEAR); if(C_begin.getweekyear ()! =c_end.getweekyear ()) {Date Totalyear=NewSimpleDateFormat ("Yyyy-mm-dd"). Parse (C_begin.getweekyear () + "12-31");                C_total.settime (totalyear); intx =C_total.get (Java.util.Calendar.WEEK_OF_YEAR);  while(x==1) {C_total.add (Java.util.Calendar.DAY_OF_MONTH,-1); X=C_total.get (Java.util.Calendar.WEEK_OF_YEAR); }                //If the end time is exactly Sunday, don't add 1 .                intWeekNum = This. Dayforweek (NewSimpleDateFormat ("Yyyy-mm-dd"). Format (end); intDuoyu = 0; if(weeknum==7) {Duoyu= X-begin+1; }Else{Duoyu= X-begin + +; } weektotal= over +Duoyu; } Else {                //If the end time is exactly Sunday, don't add 1 .                intWeekNum = This. Dayforweek (NewSimpleDateFormat ("Yyyy-mm-dd"). Format (end); if(weeknum==7) {Weektotal= Over-begin; }Else{weektotal= Over-begin + 1; }            }            if(C_begin.getweekyear ()! =now.getweekyear ()) {                //calculates the total number of weeks                intx =C_total.get (Java.util.Calendar.WEEK_OF_YEAR);  while(x==1) {C_total.add (Java.util.Calendar.DAY_OF_MONTH,-1); X=C_total.get (Java.util.Calendar.WEEK_OF_YEAR); }                intWeekNum = This. Dayforweek (NewSimpleDateFormat ("Yyyy-mm-dd"). Format (start); intDuoyu =0; if(weeknum==7) {Duoyu= X-begin + +; }Else{Duoyu= X-begin + 1; } Count= Duoyu +Z; } Else {                intWeekNum = This. Dayforweek (NewSimpleDateFormat ("Yyyy-mm-dd"). Format (start); if(weeknum==7) {Count= (Z-begin + 1) +1; }Else{Count= (Z-begin + 1); }            }            if(C_end.gettime (). GetTime () < Now.gettime (). GetTime () | | Count < 0) {                //If the current time is greater than the semester end time, the first week is displayed silentlyCount = 1; }
Drop-down box The default display of things can be deleted or retained according to the actual situationif(Week! = 0 && Flag = = 1) {Count=Week; }        }  Catch(Exception e) {e.printstacktrace (); }        return New int[]{count,weektotal}; }

/*** Determine the current date is the day of the week * *@paramPtime The time to Judge@returnDayforweek Judgment Result * @Exception exception occurred*/     Public intDayforweek (String ptime)throwsException {simpledateformat format=NewSimpleDateFormat ("Yyyy-mm-dd"); Java.util. Calendar C=java.util. calendar.getinstance ();        C.settime (Format.parse (ptime)); intDayforweek = 0; if(C.get (Java.util. Calendar.day_of_week) = = 1) {Dayforweek= 7; }Else{Dayforweek= C.get (java.util. Calendar.day_of_week)-1; }        returnDayforweek; }

/**      * Query the     start and end times of the week @param  date     @return     *    / Private map<string,date>  onceweek (date date) {       new  GregorianCalendar ();        Currentdate.settime (date);

Currentdate.setfirstdayofweek (Java.util.Calendar.MONDAY); Currentdate.set (Java.util.Calendar.HOUR_OF_DAY, 0);        Currentdate.set (Java.util.Calendar.MINUTE, 0);        Currentdate.set (Java.util.Calendar.SECOND, 0);        Currentdate.set (Java.util.Calendar.DAY_OF_WEEK, Java.util.Calendar.MONDAY);        Date Dbegin = (date) Currentdate.gettime (). Clone (); Currentdate.setfirstdayofweek (Java.util.Calendar.MONDAY); Currentdate.set (Java.util.Calendar.HOUR_OF_DAY),currentdate.set (Java.util.Calendar.MINUTE,;); Currentdate.set (Java.util.Calendar.SECOND),currentdate.set (Java.util.Calendar.DAY_OF_WEEK, Java.util.Calendar.SUNDAY); Date DEnd =(date) Currentdate.gettime (). Clone ();//Return Sundays and one weeks of dates and weeks map<string,date> Map = new hashmap< > (); Map.put ("Dbegin", Dbegin); Map.put ("DEnd", DEnd); return map;      

/*** Check the time of week *@paramStart *@paramEnd *@paramWeek *@paramFlag *@return     */    Privatelist< list<schedulevo> > Onceweeklist (date Start, Date end,intWeekintflag) {List< list<schedulevo>> List =NewArraylist<>(); Try {            int[] Total = This. Selectweeknum (Start, end,week,flag); intWeektotal = total[1]; Java.util.Calendar currentdate=NewGregorianCalendar ();            Currentdate.settime (start);  for(inti = 0; i < weektotal; i++) {Map<String,Date> map = This. Onceweek (Currentdate.gettime ()); List<ScheduleVO> lDate = finddates (Map.get ("Dbegin"), Map.get ("DEnd")); Currentdate.settime (Map.get ("DEnd")); Currentdate.add (Java.util.Calendar.DAY_OF_MONTH,1);            List.add (lDate); }        }Catch(Exception e) {System.out.print (E.getmessage ()); }        returnlist; }

  /*** Check the current date and the date specified is the day of the week *@paramBegindate *@paramEndDate *@return     */     Public StaticList<schedulevo>finddates (date begindate, date endDate) {//Digital to ChineseSimpleDateFormat sif =NewSimpleDateFormat ("Yyyy-mm-dd"); Map<Integer,String> weeknumstring =NewHashmap<>(); Weeknumstring.put (1, "Monday"); Weeknumstring.put (2, "Tuesday"); Weeknumstring.put (3, "Wednesday"); Weeknumstring.put (4, "Thursday"); Weeknumstring.put (5, "Friday"); Weeknumstring.put (6, "Saturday"); Weeknumstring.put (7, "Sunday"); Schedulevo Schedule1=NewSchedulevo (); List<ScheduleVO> lDate =NewArraylist<>();        Schedule1.setdate (Sif.format (begindate)); Schedule1.setweekname ("Monday"); Schedule1.setweek (1);        Ldate.add (SCHEDULE1); Java.util.Calendar Cal=java.util.Calendar.getInstance ();        Cal.settime (begindate); BooleanBcontinue =true; intWeek = 1;  while(bcontinue) {//adds or subtracts a specified amount of time for a given calendar field according to the calendar's rulesCal.add (Java.util.Calendar.DAY_OF_MONTH, 1); //test whether this date is after the specified date            if(Enddate.after (Cal.gettime ())) {Week++; Schedulevo Schedule=NewSchedulevo ();                Schedule.setdate (Sif.format (Cal.gettime ()));                Schedule.setweekname (Weeknumstring.get (week));                Schedule.setweek (week);            Ldate.add (schedule); }Else{bcontinue=false; }        }        returnlDate; }

JAVA date A time period of a total of several weeks, each day of the week