مبدل تاریخ میلادی به شمسی:

کد:

import java.util.Date;import java.util.GregorianCalendar;import java.util.Calendar;/*** This class contains some static methods for converting gregorian dates to* persian date* @author Nasser Sadeqi (nasser_sadeqi@yahoo.com)*/public class PersianCal{private static double len = 365.24219879;private static double base = 2346;private static double greg_len = 365.2425;private static double greg_origin_from_jalali_base = 629964;private static String greg_month_names[]={"","Jan","Feb","Mar","Apr","May","June","Jul","A ug","Sep","Oct","Nov","Dec"};//-------------------------------------------------------------------/** Converts specified gregorian date to persian date in form of (yyyy/mm/dd) */public static String getPersianDate(int gregYear,int gregMonth,int gregDay){// passed days from Greg origdouble d = Math.ceil((gregYear-1)*greg_len);// passed days from jalali basedouble d_j = d + greg_origin_from_jalali_base + getGregDayOfYear(gregYear,gregMonth,gregDay);//first result! jalali yeardouble j_y = Math.ceil(d_j/len)-2346;// day of the yeardouble j_days_of_year = Math.floor(((d_j/len) - Math.floor(d_j/len))*365)+1;System.out.println(j_days_of_year);StringBuffer result = new StringBuffer();result.append((int)j_y+"/"+(int)month(j_days_of_year)+"/"+(int)dayOfMonth(j_days_of_year));return result.toString();}/** Converts specified gregorian date to persian date in form of (yyyy/mm/dd) */public static String getPersianDate(Date d){GregorianCalendar gc = new GregorianCalendar();gc.setTime(d);int year = gc.get(Calendar.YEAR);return getPersianDate(year,(gc.get(Calendar.MONTH))+1,gc. get(Calendar.DAY_OF_MONTH));}/** Returns persian year according to specified gregorian date. */public static int getPersianYear(Date dt){GregorianCalendar gc = new GregorianCalendar();gc.setTime(dt);int gregYear = gc.get(Calendar.YEAR);int gregMonth = gc.get(Calendar.MONTH)+1;int gregDay = gc.get(Calendar.DAY_OF_MONTH);double d = Math.ceil((gregYear-1)*greg_len);double d_j = d + greg_origin_from_jalali_base + getGregDayOfYear(gregYear,gregMonth,gregDay);double j_y = Math.ceil(d_j/len)-2346;double j_days_of_year = Math.floor(((d_j/len) - Math.floor(d_j/len))*365);return (int)j_y;}/** returns the persian month number according to specified gregorian date (Months:1..12) */public static int getPersianMonth(Date dt){GregorianCalendar gc = new GregorianCalendar();gc.setTime(dt);int gregYear = gc.get(Calendar.YEAR);int gregMonth = gc.get(Calendar.MONTH)+1;int gregDay = gc.get(Calendar.DAY_OF_MONTH);double d = Math.ceil((gregYear-1)*greg_len);double d_j = d + greg_origin_from_jalali_base + getGregDayOfYear(gregYear,gregMonth,gregDay);double j_y = Math.ceil(d_j/len)-2346;double j_days_of_year = Math.floor(((d_j/len) - Math.floor(d_j/len))*365);return (int)month(j_days_of_year);}/** Returns day number (1..31) */public static int getPersianDayOfMonth(Date dt){GregorianCalendar gc = new GregorianCalendar();gc.setTime(dt);int gregYear = gc.get(Calendar.YEAR);int gregMonth = gc.get(Calendar.MONTH)+1;int gregDay = gc.get(Calendar.DAY_OF_MONTH);double d = Math.ceil((gregYear-1)*greg_len);double d_j = d + greg_origin_from_jalali_base + getGregDayOfYear(gregYear,gregMonth,gregDay);double j_y = Math.ceil(d_j/len)-2346;double j_days_of_year = Math.floor(((d_j/len) - Math.floor(d_j/len))*365);return (int)dayOfMonth(j_days_of_year);}//******************************private static double month(double day){if(day<=6*31)return Math.ceil(day/31);elsereturn Math.ceil((day-6*31)/30)+6;}private static double dayOfMonth(double day){double m = month(day);if(m<=6)return day - 31*(m-1);elsereturn day-(6*31)-(m-7)*30;}private static double getGregDayOfYear(double year,double month,double day){int greg_moneths_len[] = {0,31,28,31, 30,31,30, 31,31,30 ,31,30,31};boolean leap=false;if(((year%4)==0)&&(((year%400)!=0)))leap = true;if(leap)greg_moneths_len[2]=29;int sum=0;for(int i=0;i<month;i++)sum+=greg_moneths_len;return sum+day-2;}//**********} ​

__________________