java 获取当前时间的前后四个季度

在Java中，可以使用`java.time.LocalDate`类来获取当前时间的前后四个季度。下面是一个示例代码：

import java.time.LocalDate;
import java.time.Month;

public class Demo {
    public static void main(String[] args) {
        LocalDate today = LocalDate.now();
        int currentYear = today.getYear();
        Month currentMonth = today.getMonth();
        int currentQuarter = (currentMonth.getValue() - 1) / 3 + 1;

        // 获取前四个季度
        for (int i = currentQuarter - 4; i < currentQuarter; i++) {
            int year = currentYear;
            int quarter = i;
            if (quarter <= 0) {
                year--;
                quarter += 4;
            }
            LocalDate startDate = LocalDate.of(year, (quarter - 1) * 3 + 1, 1);
            LocalDate endDate = startDate.plusMonths(3).minusDays(1);
            System.out.println("第" + quarter + "季度：" + startDate + " - " + endDate);
        }

        // 获取后四个季度
        for (int i = currentQuarter + 1; i <= currentQuarter + 4; i++) {
            int year = currentYear;
            int quarter = i;
            if (quarter > 4) {
                year++;
                quarter -= 4;
            }
            LocalDate startDate = LocalDate.of(year, (quarter - 1) * 3 + 1, 1);
            LocalDate endDate = startDate.plusMonths(3).minusDays(1);
            System.out.println("第" + quarter + "季度：" + startDate + " - " + endDate);
        }
    }
}

这段代码首先获取当前日期的年份和月份，然后根据当前月份计算当前季度。接下来，使用循环分别计算前四个季度和后四个季度的起始日期和结束日期，并打印输出。