JAVA time and date processing class, mainly used to traverse every day between two dates ., Java every day

JAVA time and date processing class, mainly used to traverse every day between two dates ., Java every day

/***** File name: AccountDate. java ** Creation Time: ** Email: ** @ 163.com */import java. text. decimalFormat; import java. text. parseException; import java. text. simpleDateFormat; import java. util. arrayList; import java. util. date; import java. util. list; public class AccountDate {private static transient int gregorianCutoverYear = 1582;/** Number of days per month in a leap year */private static final int [] DAYS_P_MONTH_LY = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};/** days of each month in a non-leap year */private static final int [] DAYS_P_MONTH_CY = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; /** indicates the year, month, and day in the array */private static final int Y = 0, M = 1, D = 2; /*** split the String representing the date into an integer array representing the year, month, and day * @ param date * @ return */public static int [] splitYMD (String date) {date = date. replace ("-", ""); int [] ymd = {0, 0, 0}; ymd [Y] = Integer. parseInt (date. substrin G (0, 4); ymd [M] = Integer. parseInt (date. substring (4, 6); ymd [D] = Integer. parseInt (date. substring (6, 8); return ymd ;} /*** check whether the input parameter represents a leap year * @ param year * @ return */public static boolean isLeapYear (int year) {return year> = gregorianCutoverYear? (Year % 4 = 0) & (year % 100! = 0) | (year % 400 = 0): (year % 4 = 0 );} /*** date plus 1 day * @ param year * @ param month * @ param day * @ return */private static int [] addOneDay (int year, int month, int day) {if (isLeapYear (year) {day ++; if (day> DAYS_P_MONTH_LY [month-1]) {month ++; if (month> 12) {year ++; month = 1 ;}day = 1 ;}} else {day ++; if (day> DAYS_P_MONTH_CY [month-1]) {month ++; if (month> 12) {year ++; month = 1 ;}day = 1 ;}} int [] ymd = {year, month, day }; return ymd ;} /*** add less than two months or dates to two places * @ param decimal * @ return */public static String formatMonthDay (int decimal) {DecimalFormat df = new DecimalFormat ("00"); return df. format (decimal);}/*** set the year of less than four digits to four digits * @ param decimal * @ return */public static String formatYear (int decimal) {DecimalFormat df = new DecimalFormat ("0000"); return df. format (decimal );} /*** calculate the number of days between two dates * @ param begin * @ param end * @ return * @ throws ParseException */public static long countDay (String begin, String end) {SimpleDateFormat format = new SimpleDateFormat ("yyyy-MM-dd"); Date beginDate, endDate; long day = 0; try {beginDate = format. parse (begin); endDate = format. parse (end); day = (endDate. getTime ()-beginDate. getTime ()/(24x60x60*1000);} catch (ParseException e) {e. printStackTrace ();} return day ;} /*** calculate the date cyclically * @ param beginDate endDate * @ param days * @ return */public static List <String> getEveryday (String beginDate, String endDate) {long days = countDay (beginDate, endDate); int [] ymd = splitYMD (beginDate); List <String> everyDays = new ArrayList <String> (); everyDays. add (beginDate); for (int I = 0; I <days; I ++) {ymd = addOneDay (ymd [Y], ymd [M], ymd [D]); everyDays. add (formatYear (ymd [Y]) + "-" + formatMonthDay (ymd [M]) + "-" + formatMonthDay (ymd [D]);} return everyDays ;} public static void main (String [] args) {List <String> list = AccountDate. getEveryday ("2008-08-29", "2008-09-02"); for (String result: list) {System. out. println (result );}}}