根据输入开始时间年月日格式 结束日期年月日 和按季度 按月 生成连续的区间

以下是一个示例代码，可以根据输入的开始日期年月日、结束日期年月日和按季度/按月生成连续的区间。

import java.time.LocalDate;
import java.time.Month;
import java.time.Period;
import java.time.YearMonth;
import java.time.temporal.ChronoUnit;
import java.util.ArrayList;
import java.util.List;

public class DateRangeGenerator {

    public enum IntervalType {
        QUARTER, // 按季度
        MONTH // 按月
    }

    public static List<YearMonth> generateDateRange(LocalDate startDate, LocalDate endDate, IntervalType intervalType) {
        List<YearMonth> dateRange = new ArrayList<>();
        if (intervalType == IntervalType.QUARTER) { // 按季度
            LocalDate quarterStart = startDate.with(Month.JANUARY).withDayOfMonth(1);
            LocalDate quarterEnd = quarterStart.plusMonths(2).withDayOfMonth(quarterStart.plusMonths(2).lengthOfMonth());
            while (quarterEnd.isBefore(endDate) || quarterEnd.isEqual(endDate)) {
                YearMonth yearMonth = YearMonth.from(quarterStart);
                dateRange.add(yearMonth);
                quarterStart = quarterStart.plusMonths(3);
                quarterEnd = quarterStart.plusMonths(2).withDayOfMonth(quarterStart.plusMonths(2).lengthOfMonth());
            }
        } else { // 按月
            YearMonth yearMonth = YearMonth.from(startDate);
            while (yearMonth.isBefore(YearMonth.from(endDate)) || yearMonth.equals(YearMonth.from(endDate))) {
                dateRange.add(yearMonth);
                yearMonth = yearMonth.plusMonths(1);
            }
        }
        return dateRange;
    }

    public static void main(String[] args) {
        LocalDate startDate = LocalDate.of(2021, Month.JANUARY, 1);
        LocalDate endDate = LocalDate.of(2022, Month.JUNE, 30);
        
        // 根据输入的开始时间年月日格式和结束日期年月日，获取LocalDate对象
        LocalDate startDateFromInput = LocalDate.of(2021, Month.JULY, 1);
        LocalDate endDateFromInput = LocalDate.of(2022, Month.DECEMBER, 31);

        // 按季度生成区间
        List<YearMonth> quarterDateRange = generateDateRange(startDateFromInput, endDateFromInput, IntervalType.QUARTER);
        for (YearMonth yearMonth : quarterDateRange) {
            System.out.println(yearMonth);
        }

        // 按月生成区间
        List<YearMonth> monthDateRange = generateDateRange(startDateFromInput, endDateFromInput, IntervalType.MONTH);
        for (YearMonth yearMonth : monthDateRange) {
            System.out.println(yearMonth);
        }
    }
}

在上面的代码中，我们增加了两个LocalDate类型的变量startDateFromInput和endDateFromInput，分别表示输入的开始日期和结束日期。在main方法中，我们调用generateDateRange方法生成按季度和按月的区间，并打印输出。输出结果与前面的示例代码一致。