Java遍历日期代码

• Z时代
• 2024-01-10
• 分类：综合

import java.util.ArrayList;
import java.util.List;
public class DateTraveller {
	public static List<String> getDateList(String startDateString, String endDateString) {
		List<String> dateList = new ArrayList<String>();
		// start date
		int startDate = Integer.parseInt(startDateString);
		int startYear = startDate / 10000;
		int startMonth = startDate / 100 % 100;
		int startDay = startDate % 100;
		// end date
		int endDate = Integer.parseInt(endDateString);
		int endYear = endDate / 10000;
		int endMonth = endDate / 100 % 100;
		int endDay = endDate % 100;
		// begin
		int y = startYear;
		int m = startMonth;
		int d = startDay;
		while (y < endYear || y == endYear && m < endMonth || y == endYear && m == endMonth && d <= endDay) {
//			System.out.println(y + "-" + m + "-" + d + " vs. " + endYear + "-" + endMonth + "-" + endDay + " : " + 
//					(y < endYear) + "," +  (y == endYear && m < endMonth) + "," + (y == endYear && m == endMonth && d <= endDay)
//					);
			String tmpDateString = String.format("%d%02d%02d", y, m, d);
			dateList.add(tmpDateString);
			boolean isRunNian = (y % 400 == 0 || y % 4 == 0 && y % 100 != 0);
			int lastDay = 31;
			if (m == 2) {
				if (isRunNian) lastDay = 29;
				else lastDay = 28;
			} 
			else if (m <= 7 && m % 2 == 0 || m > 7 && m % 2 == 1) {
				lastDay = 30;
			}
			if (d >= lastDay) {
				m ++;
				d = 1;
				if (m > 12) {
					y ++;
					m = 1;
				}
			}
			else {
				d ++;
			}
		}
		return dateList;
	}
	// test
	public static void main(String[] args) {
		List<String> dateList = getDateList("20151203", "20160301");
		for (String dateS : dateList) {
			System.out.println(dateS);
		}
	}
}

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