日期类

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.time.LocalDate;
import java.time.Month;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Test {


    @Data
    @Builder
    @AllArgsConstructor
    @NoArgsConstructor
    public static class Quarter {
        private Month monthS;
        private int monthDayS;
        private Month monthE;
        private int monthDayE;
    }

    public static void main(String[] args) {

        Map<Integer, Quarter> quarterIndex2QuarterDay = new HashMap<>() {{
            put(1, Quarter.builder().monthS(Month.JANUARY).monthDayS(1).monthE(Month.MARCH).monthDayE(31).build());
            put(2, Quarter.builder().monthS(Month.APRIL).monthDayS(1).monthE(Month.JUNE).monthDayE(30).build());
            put(3, Quarter.builder().monthS(Month.JULY).monthDayS(1).monthE(Month.SEPTEMBER).monthDayE(30).build());
            put(4, Quarter.builder().monthS(Month.OCTOBER).monthDayS(1).monthE(Month.DECEMBER).monthDayE(31).build());
        }};

        Map<Integer, List<Integer>> currentQuarterIndexMap = new HashMap<>() {{
            put(1, Arrays.asList(2, 3, 4, 1));
            put(2, Arrays.asList(3, 4, 1, 2));
            put(3, Arrays.asList(4, 1, 2, 3));
            put(4, Arrays.asList(1, 2, 3, 4));
        }};

        int currentQ = (int) Math.ceil(LocalDate.now().getMonthValue() / 3.0);
        int currentYear = LocalDate.now().getYear();
        List<Integer> qList = currentQuarterIndexMap.get(currentQ);
        for (Integer q : qList) {
            int year;
            if (q <= currentQ) {
                year = currentYear;
            } else {
                year = currentYear - 1;
            }

            Quarter quarter = quarterIndex2QuarterDay.get(q);
            System.err.println(LocalDate.of(year, quarter.getMonthS(), quarter.getMonthDayS()));
            System.err.println(LocalDate.of(year, quarter.getMonthE(), quarter.getMonthDayE()));

        }


    }

}