Conversion between a calendar and a calendar date (Java)

Package com. test;

Import java. Text. dateformat;
Import java. Text. simpledateformat;

Import java. util. calendar;
Import java. util. date;

Public class Test2 {
Private Final Static int month_days [] = {29, 30 };
Private Final Static int days_month [] [] = {
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 31 },
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31 }};
Private Final Static int datas [] [] = {
{23, 3, 2, 17, 1, 0, 0, 1, 0, 0, 1, 1, 0 },
{41, 0, 4, 23, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1 },
{30, 7, 5, 28, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1 },
{49, 0, 6, 33, 1, 1, 0, 0, 1, 0, 0, 1 },
{38, 0, 0, 38, 1, 1, 0, 1, 0, 1, 0, 0, 1 },
{26, 6, 2, 44, 1, 1, 0, 1, 1, 0, 1, 0, 0 },
{45, 0, 3, 49, 1, 0, 1, 1, 0, 1, 0, 1, 0 },
{35, 0, 4, 54, 0, 1, 0, 1, 0, 1, 1, 0, 1 },
{24, 4, 5, 59, 1, 0, 1, 0, 1, 0, 1, 0, 1 },
{43, 0, 0, 5, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1 },
{32, 0, 1, 10, 1, 0, 0, 1, 0, 0, 1, 0, 1 },
{21, 2, 2, 15, 1, 1, 0, 0, 1, 0, 0, 1 },
{40, 0, 3, 20, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1 },
{28, 7, 5, 26, 1, 0, 1, 1, 0, 1, 0, 0, 1 },
{47, 0, 6, 31, 0, 1, 1, 0, 1, 1, 0, 0, 1 },
{36, 0, 0, 36, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0 },
{26, 5, 1, 41, 0, 1, 0, 1, 0, 1, 0, 1 },
{44, 0, 3, 47, 0, 1, 0, 0, 1, 1, 0, 1 },
{33, 0, 4, 52, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0 },
{23, 3, 5, 57, 0, 1, 0, 1, 0, 0, 1, 0, 1 },
{42, 0, 6, 2, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1 },
{30, 8, 1, 8, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0 },
{48, 0, 2, 13, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
{38, 0, 3, 18, 0, 1, 1, 0, 1, 0, 1, 0, 1 },
{27, 6, 4, 23, 1, 0, 1, 0, 1, 1, 0, 1, 0 },
{45, 0, 6, 29, 1, 0, 1, 0, 1, 0, 1, 1, 0, 0 },
{35, 0, 0, 34, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1 },
{24, 4, 1, 39, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
{43, 0, 2, 44, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
{32, 0, 4, 50, 0, 1, 0, 1, 0, 0, 1, 0 },
{20, 3, 5, 55, 1, 1, 1, 0, 1, 0, 0, 1, 0 },
{39, 0, 6, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 0 },
{29, 7, 0, 5, 0, 1, 0, 1, 1, 0, 1, 0, 1 },
{47, 0, 2, 11, 0, 1, 0, 1, 0, 1, 1, 0, 1 },
{36, 0, 3, 16, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0 },
{26, 5, 4, 21, 0, 1, 0, 0, 1, 0, 1, 0, 1 },
{45, 0, 5, 26, 0, 1, 0, 0, 1, 0, 1, 0, 1 },
{33, 0, 0, 32, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1 },
{22, 4, 1, 37, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1 },
{41, 0, 2, 42, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1 },
{30, 8, 3, 47, 1, 1, 0, 1, 0, 1, 0, 1 },
{48, 0, 5, 53, 1, 0, 1, 1, 0, 1, 0, 1 },
{37, 0, 6, 58, 1, 0, 1, 1, 0, 1, 0, 1 },
{27, 6, 0, 3, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0 },
{46, 0, 1, 8, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0 },
{35, 0, 3, 14, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1 },
{24, 4, 4, 19, 1, 0, 1, 0, 0, 1, 0, 0, 1 },
{43, 0, 5, 24, 1, 0, 1, 0, 0, 1, 0, 0, 1 },
{32, 10, 6, 29, 1, 0, 1, 1, 0, 0, 1, 0, 0, 1 },
{50, 0, 1, 35, 0, 1, 1, 0, 1, 0, 1, 0 },
{39, 0, 2, 40, 0, 1, 1, 0, 1, 1, 0, 1 },
{28, 6, 3, 45, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0 },
{47, 0, 4, 50, 1, 0, 1, 0, 1, 0, 1, 0, 1 },
{36, 0, 6, 56, 1, 0, 0, 1, 0, 0, 1, 1, 0 },
{26, 5, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 1 },
{45, 0, 1, 6, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0 },
{34, 0, 2, 11, 0, 1, 1, 0, 1, 0, 0, 1, 0 },
{22, 3, 4, 17, 0, 1, 1, 0, 1, 0, 1, 0 },
{40, 0, 5, 22, 1, 1, 1, 0, 1, 0, 1, 0, 0 },
{30, 8, 6, 27, 0, 1, 1, 0, 1, 0, 1, 0, 0 },
{49, 0, 0, 32, 0, 1, 0, 1, 1, 0, 1, 0, 1 },
{37, 0, 2, 38, 1, 0, 1, 0, 1, 0, 1, 0, 1 },
{27, 5, 3, 43, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1 },
{46, 0, 4, 48, 1, 0, 0, 1, 0, 0, 1, 0, 1 },
{35, 0, 5, 53, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1 },
{23, 4, 0, 59, 1, 1, 0, 1, 0, 1, 0, 0, 1 },
{42, 0, 1, 4, 1, 1, 0, 1, 0, 1, 0, 0, 1 },
{31, 0, 2, 9, 1, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0 },
{21, 2, 3, 14, 0, 1, 0, 1, 1, 0, 1, 0, 1 },
{39, 0, 5, 20, 0, 1, 0, 1, 0, 1, 1, 0, 1 },
{28, 7, 6, 25, 1, 0, 1, 0, 1, 0, 1, 0, 1 },
{48, 0, 0, 30, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1 },
{37, 0, 1, 35, 1, 0, 0, 1, 0, 0, 1, 0, 1 },
{25, 5, 3, 41, 1, 1, 0, 0, 1, 0, 0, 1 },
{44, 0, 4, 46, 1, 0, 1, 0, 1, 0, 0, 1 },
{33, 0, 5, 51, 1, 0, 1, 1, 0, 1, 0, 0, 1 },
{22, 4, 6, 56, 1, 0, 1, 1, 0, 1, 0, 0 },
{40, 0, 1, 2, 1, 0, 1, 1, 0, 1, 0, 1, 0 },
{30, 9, 2, 7, 0, 1, 0, 1, 0, 1, 0, 1 },
{49, 0, 3, 12, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1 },
{38, 0, 4, 17, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0 },
{27, 6, 6, 23, 0, 1, 0, 1, 0, 0, 1, 0, 1 },
{46, 0, 0, 28, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
{35, 0, 1, 33, 0, 1, 1, 0, 1, 0, 0, 1, 0 },
{24, 4, 2, 38, 0, 1, 1, 1, 0, 1, 0, 0, 1 },
{42, 0, 4, 44, 0, 1, 1, 0, 1, 0, 1 },
{31, 0, 5, 49, 1, 0, 1, 0, 1, 1, 0, 1, 0 },
{21, 2, 6, 54, 0, 1, 0, 1, 0, 1, 0, 1 },
{40, 0, 0, 59, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1 },
{28, 6, 2, 5, 1, 0, 1, 0, 0, 1, 0, 1, 0 },
{47, 0, 3, 10, 1, 0, 1, 0, 0, 1, 0, 0, 1, 1, 0, 1 },
{36, 0, 4, 15, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1 },
{25, 5, 5, 20, 1, 1, 1, 0, 1, 0, 0, 0, 0, 1, 0 },
{43, 0, 0, 26, 1, 1, 0, 1, 0, 1, 0, 1 },
{32, 0, 1, 31, 1, 1, 0, 1, 1, 0, 1, 0, 0 },
{22, 3, 2, 36, 0, 1, 1, 0, 1, 0, 1, 0 }};

/**
* Obtain the corresponding calendar date based on the lunar calendar (the date must be between-years)
*
* @ Param date
* Lunar date (string)
* @ Return returns the corresponding calendar date.
* @ Throws exception
*/
Public static date getgregoriancalendar (string date ){
Calendar c = getcalendar (date );
Int year = C. Get (calendar. year );
Int month = C. Get (calendar. month) + 1;
Int day = C. Get (calendar. day_of_month );
Int Index = years-1936;
Int endindex = month;

If (datas [Index] [1]! = 0) & (month> datas [Index] [1]) {
Endindex ++;
}

Int daynum = 0;

For (INT I = 0; I <(endindex-1); I ++ ){
Daynum + = month_days [datas [Index] [4 + I];
}

Daynum + = Day;
Daynum + = datas [Index] [0];

Int year_days = 365;

If (isleapyear (year )){
Year_days = 366;
}

If (daynum> year_days ){
Year ++;
Daynum-= year_days;
}

Month = 1;

Int dayofmonth [] = days_month [0];

If (isleapyear (year )){
Dayofmonth = days_month [1];
}

Int I = 0;

For (; I <12; I ++ ){
Daynum-= dayofmonth [I];

If (daynum <= 0 ){
Break;
}

Month ++;
}

Day = dayofmonth [I] + daynum;

Return getdate (Year + "-" + month + "-" + Day );
}

/**
* Obtain the corresponding calendar date based on the Gregorian calendar (the date must be between-years)
*
* @ Param date
* Gregorian date (string)
* @ Return returns the lunar calendar date.
* @ Throws exception
*/
Public static date getlunarcalendar (string date ){
Calendar calendar = getcalendar (date );
Int year = calendar. Get (calendar. year );
Int month = 1;
Int Day;

If (year <1936) | (Year> 2028 )){
Return NULL;
}

Int Index = years-1936;
Int l_days = datas [Index] [0];
Int day_year = calendar. Get (calendar. day_of_year );
Int days;

If (day_year> = l_days ){
Days = day_year-l_days;
} Else {
Index --;
Year --;

Calendar c = getcalendar (Year + "-12-31 ");
Days = (C. Get (calendar. day_of_year) + day_year)-datas [Index] [0];
}

Int I = 0;
Int day_num = 0;

For (; I <13; I ++ ){
Day_num + = month_days [datas [Index] [I + 4];

If (day_num> = days ){
Break;
}

Month ++;
}

Day = month_days [datas [Index] [I + 4]-(day_num-days );

If (datas [Index] [1]! = 0) & (month> datas [Index] [1]) {
Month --;
}

Return getdate (Year + "-" + month + "-" + Day );
}

Private Static calendar getcalendar (string date ){
Date dd = getdate (date );
Calendar calendar = calendar. getinstance ();
Calendar. settime (dd );

Return calendar;
}

Private Static date getdate (string date ){
Dateformat format = new simpledateformat ("yyyy-mm-dd ");
Date dd = NULL;

Try {
Dd = format. parse (date );
} Catch (exception e ){
E. printstacktrace ();
}

Return dd;
}

Private Static Boolean isleapyear (INT year ){
If (Year % 400) = 0 ){
Return true;
} Else if (Year % 100) = 0 ){
Return false;
} Else if (Year % 4) = 0 ){
Return true;
}

Return false;
}
 
Public static void main (string [] ARGs ){
Simpledateformat dateformat = new simpledateformat ("yyyy-mm-dd ");
System. Out. println ("Lunar calendar:" + dateformat. Format (getlunarcalendar ("2010-08-03 ")));
}

}