Java获取当月工作日实现方法

1. 流程

首先我们需要确定获取当月工作日的具体步骤，我们可以用以下表格展示：

步骤 说明
1 获取当月第一天的日期
2 获取当月最后一天的日期
3 循环遍历从第一天到最后一天的日期
4 判断每一天是否为工作日
5 统计工作日的数量

2. 代码实现

步骤1：获取当月第一天的日期

import java.util.Calendar;
import java.util.Date;

public class WorkdayCalculator {
    public Date getFirstDayOfMonth() {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        return calendar.getTime();
    }
}

步骤2：获取当月最后一天的日期

import java.util.Calendar;
import java.util.Date;

public class WorkdayCalculator {
    public Date getLastDayOfMonth() {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
        return calendar.getTime();
    }
}

步骤3：循环遍历从第一天到最后一天的日期

import java.util.Calendar;
import java.util.Date;

public class WorkdayCalculator {
    public void loopThroughDays(Date firstDay, Date lastDay) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(firstDay);
        while (calendar.getTime().before(lastDay)) {
            // Do something with each day
            calendar.add(Calendar.DAY_OF_MONTH, 1);
        }
    }
}

步骤4：判断每一天是否为工作日

import java.util.Calendar;

public class WorkdayCalculator {
    public boolean isWorkday(Calendar day) {
        int dayOfWeek = day.get(Calendar.DAY_OF_WEEK);
        return dayOfWeek != Calendar.SATURDAY && dayOfWeek != Calendar.SUNDAY;
    }
}

步骤5：统计工作日的数量

import java.util.Calendar;

public class WorkdayCalculator {
    public int countWorkdays(Calendar firstDay, Calendar lastDay) {
        int count = 0;
        while (firstDay.before(lastDay) || firstDay.equals(lastDay)) {
            if (isWorkday(firstDay)) {
                count++;
            }
            firstDay.add(Calendar.DAY_OF_MONTH, 1);
        }
        return count;
    }
}

类图

classDiagram
    WorkdayCalculator

关系图

erDiagram
    WORKDAY_CALCULATOR ||--|{ CALENDAR : contains

通过以上步骤，你可以成功实现Java获取当月工作日的功能。希望这篇文章对你有所帮助，加油！