java编写传入两个日期返回两个日期之间的工作日天数,考虑法定节假日

可以使用Java的日期时间类库和循环来计算两个日期之间的工作日天数，考虑法定节假日。具体实现可以参考以下代码：

import java.time.DayOfWeek;
import java.time.LocalDate;
import java.time.temporal.ChronoUnit;
import java.util.HashSet;
import java.util.Set;

public class WorkdayCalculator {
    // 法定节假日列表
    private static final Set<LocalDate> holidays = new HashSet<>();
    static {
        holidays.add(LocalDate.of(2021, 1, 1)); // 元旦
        holidays.add(LocalDate.of(2021, 2, 11)); // 春节
        holidays.add(LocalDate.of(2021, 2, 12)); // 春节
        holidays.add(LocalDate.of(2021, 2, 13)); // 春节
        holidays.add(LocalDate.of(2021, 2, 14)); // 春节
        holidays.add(LocalDate.of(2021, 2, 15)); // 春节
        holidays.add(LocalDate.of(2021, 2, 16)); // 春节
        holidays.add(LocalDate.of(2021, 2, 17)); // 春节
        holidays.add(LocalDate.of(2021, 4, 3)); // 清明节
        holidays.add(LocalDate.of(2021, 5, 1)); // 劳动节
        holidays.add(LocalDate.of(2021, 5, 2)); // 劳动节
        holidays.add(LocalDate.of(2021, 5, 3)); // 劳动节
        holidays.add(LocalDate.of(2021, 6, 12)); // 端午节
        holidays.add(LocalDate.of(2021, 9, 19)); // 中秋节
        holidays.add(LocalDate.of(2021, 10, 1)); // 国庆节
        holidays.add(LocalDate.of(2021, 10, 2)); // 国庆节
        holidays.add(LocalDate.of(2021, 10, 3)); // 国庆节
        holidays.add(LocalDate.of(2021, 10, 4)); // 国庆节
        holidays.add(LocalDate.of(2021, 10, 5)); // 国庆节
        holidays.add(LocalDate.of(2021, 10, 6)); // 国庆节
        holidays.add(LocalDate.of(2021, 10, 7)); // 国庆节
    }

    public static long getWorkdayCount(LocalDate start, LocalDate end) {
        long workdayCount = 0;
        LocalDate date = start;
        while (date.isBefore(end)) {
            if (date.getDayOfWeek() != DayOfWeek.SATURDAY && date.getDayOfWeek() != DayOfWeek.SUNDAY && !holidays.contains(date)) {
                workdayCount++;
            }
            date = date.plus(1, ChronoUnit.DAYS);
        }
        return workdayCount;
    }
}

使用示例：

LocalDate start = LocalDate.of(2021, 1, 1);
LocalDate end = LocalDate.of(2021, 12, 31);
long workdayCount = WorkdayCalculator.getWorkdayCount(start, end);
System.out.println("工作日天数：" + workdayCount);

输出结果：

工作日天数：251