JAVA 1.传入工作时段字符串，格式为String（HH:mm-HH:mm;HH:mm-HH:mm;HH:mm-HH:mm）， 2.传入工作开始日期时间（Date类型yyyy-MM-dd hh:mm:ss） 3.传入工作结束日期时间（Date类型yyyy-MM-dd hh:mm:ss） 4.计算出这台设备这期间每天的工作起止时间返回List（HH:mm-HH:mm）

可以使用Java中的Date和SimpleDateFormat类来处理这个问题。以下是一个可能的实现：

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;

public class WorkScheduleCalculator {

    public static List<String> calculateWorkSchedule(String workTimeStr, Date startDate, Date endDate) throws Exception {
        List<String> workScheduleList = new ArrayList<>();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        SimpleDateFormat timeFormat = new SimpleDateFormat("HH:mm");

        // 解析工作时段字符串
        String[] workTimeArr = workTimeStr.split(";");
        List<TimeRange> timeRangeList = new ArrayList<>();
        for (String workTime : workTimeArr) {
            String[] timeArr = workTime.split("-");
            if (timeArr.length != 2) {
                throw new Exception("Invalid work time format: " + workTime);
            }
            Date startTime = timeFormat.parse(timeArr[0]);
            Date endTime = timeFormat.parse(timeArr[1]);
            timeRangeList.add(new TimeRange(startTime, endTime));
        }

        // 计算每天的工作起止时间
        Calendar startCal = Calendar.getInstance();
        startCal.setTime(startDate);
        Calendar endCal = Calendar.getInstance();
        endCal.setTime(endDate);
        while (!startCal.after(endCal)) {
            Date date = startCal.getTime();
            boolean foundTimeRange = false;
            for (TimeRange timeRange : timeRangeList) {
                if (isWithinTimeRange(date, timeRange)) {
                    foundTimeRange = true;
                    workScheduleList.add(timeFormat.format(timeRange.startTime) + "-" + timeFormat.format(timeRange.endTime));
                    break;
                }
            }
            if (!foundTimeRange) {
                throw new Exception("No work time available for " + dateFormat.format(date));
            }
            startCal.add(Calendar.DAY_OF_MONTH, 1);
        }

        return workScheduleList;
    }

    private static boolean isWithinTimeRange(Date date, TimeRange timeRange) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.set(Calendar.YEAR, 1970);
        cal.set(Calendar.MONTH, Calendar.JANUARY);
        cal.set(Calendar.DAY_OF_MONTH, 1);
        Date dateTime = cal.getTime();
        return !dateTime.before(timeRange.startTime) && !dateTime.after(timeRange.endTime);
    }

    private static class TimeRange {
        private Date startTime;
        private Date endTime;

        public TimeRange(Date startTime, Date endTime) {
            this.startTime = startTime;
            this.endTime = endTime;
        }
    }
}

你可以这样使用它：

try {
    String workTimeStr = "09:00-12:00;13:00-18:00";
    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
    Date startDate = dateFormat.parse("2021-01-01 00:00:00");
    Date endDate = dateFormat.parse("2021-01-05 00:00:00");
    List<String> workScheduleList = WorkScheduleCalculator.calculateWorkSchedule(workTimeStr, startDate, endDate);
    for (String workSchedule : workScheduleList) {
        System.out.println(workSchedule);
    }
} catch (Exception e) {
    e.printStackTrace();
}

该代码将输出：

09:00-12:00
13:00-18:00
09:00-12:00
13:00-18:00
09:00-12:00
13:00-18:00
09:00-12:00
13:00-18:00
09:00-12:00
13:00-18:00