time

import java.time.LocalDate;
import java.time.DayOfWeek;
import java.time.format.DateTimeFormatter;
import java.time.temporal.TemporalAdjusters;
import java.util.ArrayList;
import java.util.List;

class WeekRange {
private LocalDate startDate;
private LocalDate endDate;
private static final DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd");

public WeekRange(LocalDate startDate, LocalDate endDate) {
    this.startDate = startDate;
    this.endDate = endDate;
}

public LocalDate getStartDate() {
    return startDate;
}

public LocalDate getEndDate() {
    return endDate;
}

@Override
public String toString() {
    return "WeekRange{" +
            "startDate=" + startDate.format(formatter) +
            ", endDate=" + endDate.format(formatter) +
            '}';
}

}

public class WeekRangeCalculator {

public static List<WeekRange> getWeekRanges(String start, String end) {
    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyyMMdd");
    LocalDate startDate = LocalDate.parse(start, formatter);
    LocalDate endDate = LocalDate.parse(end, formatter);

    List<WeekRange> weekRanges = new ArrayList<>();

    // 找到第一个开始日期的周一
    LocalDate currentStart = startDate.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY));
    // 找到最后一个结束日期的周日
    LocalDate finalEnd = endDate.with(TemporalAdjusters.nextOrSame(DayOfWeek.SUNDAY));

    while (!currentStart.isAfter(finalEnd)) {
        LocalDate currentEnd = currentStart.with(TemporalAdjusters.nextOrSame(DayOfWeek.SUNDAY));
        weekRanges.add(new WeekRange(currentStart, currentEnd));

        // 下一个周的开始日期
        currentStart = currentStart.plusWeeks(1);
    }

    return weekRanges;
}

public static void main(String[] args) {
    String start = "20260801";
    String end = "20260831";
    List<WeekRange> weekRanges = getWeekRanges(start, end);

    for (WeekRange range : weekRanges) {
        System.out.println(range);
    }
}

}