The example in this article describes the JAVA time and date processing class, which is mainly used to traverse every day between two dates. Share it with everyone for your reference. The details are as follows:
/*** * File name: AccountDate.java* * Creation time: 2008-11-18** 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 leap year*/ private static final int[] DAYS_P_MONTH_LY= {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} ; /** Number of days per month in non-leap years*/ private static final int[] DAYS_P_MONTH_CY= {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; /** Represents 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.substring(0, 4)); ymd[M] = Integer.parseInt(date.substring(4, 6)); ymd[D] = Integer.parseInt(date.substring(6, 8)); return ymd; } /** * Check whether the year represented by the passed parameter is 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; } /** * Complement the month or day with less than two digits to two digits * @param decimal * @return */ public static String formatMonthDay(int decimal){ DecimalFormat df = new DecimalFormat("00"); return df.format( decimal ); } /** * Complement the year with 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())/(24*60*60*1000); } catch (ParseException e) { e.printStackTrace(); } return day; } /** * Calculate dates in a loop* @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); } }}I hope this article will be helpful to everyone’s Java programming.