计算工作日包括节假日(calculate business days including holid

2019-06-25 02:41发布

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我需要计算两个日期之间的工作日。 例如：我们在july4th假期（在美国）。 所以，如果我的日期日期1 = 07月03日期2 = 07月06日

没有工作日B / W这些日期应该是1，因为july4th是假期。

我有一个下面的方法来calclulate业务天，这只会计算本周结束，但没有节假日。 有没有什么办法计算假期也....请帮我在这。 

  public static int getWorkingDaysBetweenTwoDates(Date startDate, Date endDate) {  
    Calendar startCal;  
    Calendar endCal;  
    startCal = Calendar.getInstance();  
    startCal.setTime(startDate);  
    endCal = Calendar.getInstance();  
    endCal.setTime(endDate);  
    int workDays = 0;  

    //Return 0 if start and end are the same  
    if (startCal.getTimeInMillis() == endCal.getTimeInMillis()) {  
        return 0;  
    }  

    if (startCal.getTimeInMillis() > endCal.getTimeInMillis()) {  
        startCal.setTime(endDate);  
        endCal.setTime(startDate);  
    }  

    do {  
        startCal.add(Calendar.DAY_OF_MONTH, 1);  
        if (startCal.get(Calendar.DAY_OF_WEEK) != Calendar.SATURDAY   
       && startCal.get(Calendar.DAY_OF_WEEK) != Calendar.SUNDAY) {  
            ++workDays;  
        }  
    } while (startCal.getTimeInMillis() < endCal.getTimeInMillis());  

    return workDays;  
}

Answer 1:

让我们假设你有一个包含所有的节假日列表，如你所提到的。 

ArrayList<Integer> holidays = ...

只需添加一个条件，你if在你的病情do-while ： 

do {
          startCal.add(Calendar.DAY_OF_MONTH, 1);
          if (startCal.get(Calendar.DAY_OF_WEEK) != Calendar.SATURDAY
          && startCal.get(Calendar.DAY_OF_WEEK) != Calendar.SUNDAY
          && !holidays.contains((Integer) startCal.get(Calendar.DAY_OF_YEAR))) {
              ++workDays;
          }
} while (startCal.getTimeInMillis() < endCal.getTimeInMillis());

为简单起见，我假定holiday包含格式相同的日期Calendar.DAY_OF_YEAR 。



Answer 2:

Nager.Date

您可以使用JSON API的Nager.Date项目。 它支持美国，加拿大和欧洲。 可用于每年的数据可以保存在自己的数据库中的信息。

例 

//https://github.com/FasterXML/jackson-databind/
ObjectMapper mapper = new ObjectMapper();
MyValue value = mapper.readValue(new URL("http://date.nager.at/api/v1/get/US/2017"), PublicHoliday[].class);

PublicHoliday.class 

public class PublicHoliday
{
    public String date;
    public String localName;
    public String name;
    public String countryCode;
    public Boolean fixed;
    public Boolean countyOfficialHoliday;
    public Boolean countyAdministrationHoliday;
    public Boolean global;
    public String[] counties;
    public int launchYear;
}

例如JSON数据检索。 

[
  {
    "date": "2017-01-01",
    "localName": "New Year's Day",
    "name": "New Year's Day",
    "countryCode": "US",
    "fixed": true,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": true,
    "counties": null,
    "launchYear": null
  },
  {
    "date": "2017-01-16",
    "localName": "Martin Luther King, Jr. Day",
    "name": "Martin Luther King, Jr. Day",
    "countryCode": "US",
    "fixed": true,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": true,
    "counties": null,
    "launchYear": null
  },
  {
    "date": "2017-01-20",
    "localName": "Inauguration Day",
    "name": "Inauguration Day",
    "countryCode": "US",
    "fixed": true,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": false,
    "counties": [
      "US-DC",
      "US-LA",
      "US-MD",
      "US-VA"
    ],
    "launchYear": null
  },
  {
    "date": "2017-02-20",
    "localName": "Washington's Birthday",
    "name": "Presidents' Day",
    "countryCode": "US",
    "fixed": true,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": true,
    "counties": null,
    "launchYear": null
  },
  {
    "date": "2017-05-29",
    "localName": "Memorial Day",
    "name": "Memorial Day",
    "countryCode": "US",
    "fixed": true,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": true,
    "counties": null,
    "launchYear": null
  },
  {
    "date": "2017-07-04",
    "localName": "Independence Day",
    "name": "Independence Day",
    "countryCode": "US",
    "fixed": true,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": true,
    "counties": null,
    "launchYear": null
  },
  {
    "date": "2017-09-04",
    "localName": "Labor Day",
    "name": "Labor Day",
    "countryCode": "US",
    "fixed": true,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": true,
    "counties": null,
    "launchYear": null
  },
  {
    "date": "2017-09-09",
    "localName": "Columbus Day",
    "name": "Columbus Day",
    "countryCode": "US",
    "fixed": true,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": false,
    "counties": [
      "US-AL",
      "US-AZ",
      "US-CO",
      "US-CT",
      "US-DC",
      "US-GA",
      "US-ID",
      "US-IL",
      "US-IN",
      "US-IA",
      "US-KS",
      "US-KY",
      "US-LA",
      "US-ME",
      "US-MD",
      "US-MA",
      "US-MS",
      "US-MO",
      "US-MT",
      "US-NE",
      "US-NH",
      "US-NJ",
      "US-NM",
      "US-NY",
      "US-NC",
      "US-OH",
      "US-OK",
      "US-PA",
      "US-RI",
      "US-SC",
      "US-TN",
      "US-UT",
      "US-VA",
      "US-WV"
    ],
    "launchYear": null
  },
  {
    "date": "2017-11-10",
    "localName": "Veterans Day",
    "name": "Veterans Day",
    "countryCode": "US",
    "fixed": false,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": true,
    "counties": null,
    "launchYear": null
  },
  {
    "date": "2017-12-23",
    "localName": "Thanksgiving Day",
    "name": "Thanksgiving Day",
    "countryCode": "US",
    "fixed": true,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": true,
    "counties": null,
    "launchYear": 1863
  },
  {
    "date": "2017-12-25",
    "localName": "Christmas Day",
    "name": "Christmas Day",
    "countryCode": "US",
    "fixed": true,
    "countyOfficialHoliday": true,
    "countyAdministrationHoliday": true,
    "global": true,
    "counties": null,
    "launchYear": null
  }
]


Answer 3:

由于接受的答案仍然使用过时的Calendar类-这是一个使用新的Java日期和时间API我的两分钱。

你必须得到从什么地方休假的日期，没有标准的Java库，用于它。 这无论如何都会过于本地化，因为假期在很大程度上取决于你的国家和地区。 （除广为人知的节日，如圣诞节，复活节）。
你可以从一个假期API得到它们，例如。 在下面的代码，我硬编码它们作为一个List的LocalDate秒。

Java的9 

LocalDate startDate = LocalDate.of(2012, 3, 7);
LocalDate endDate = LocalDate.of(2012, 6, 7);

// I've hardcoded the holidays as LocalDates and put them in a List
final List<LocalDate> holidays = Arrays.asList(
    LocalDate.of(2018, 7, 4)
);

List<LocalDate> allDates =

    // Java 9 provides a method to return a stream with dates from the
    // startdate to the given end date. Note that the end date itself is
    // NOT included.
    startDate.datesUntil(endDate)

        // Retain all business days. Use static imports from
        // java.time.DayOfWeek.*
        .filter(t -> Stream.of(MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY)
            .anyMatch(t.getDayOfWeek()::equals))

        // Retain only dates not present in our holidays list
        .filter(t -> !holidays.contains(t))

         // Collect them into a List. If you only need to know the number of
         // dates, you can also use .count()
        .collect(Collectors.toList());

Java的8

该方法LocalDate.datesUntil不是在Java中8，所以你必须获得以不同的方式在这两个日期之间的所有日期的流。 我们必须先算在使用之间的天总数ChronoUnit.DAYS.between方法。 

long numOfDaysBetween = ChronoUnit.DAYS.between(startDate, endDate);

然后，我们必须生成一个整数序列完全相同，只要开始和结束日期之间的天数，然后创建LocalDate从中S，起始于开始日期。 

IntStream.iterate(0, i -> i + 1)
    .limit(numOfDaysBetween)
    .mapToObj(startDate::plusDays)

现在我们有一个Stream<LocalDate> ，然后你可以使用Java代码9的剩余部分。



Answer 4:

我没有任何代码样本或类似的东西，但我做了一些搜索你的设备上以及有一些链接到Web服务，可以返回的度假日期为你，它可以帮助你得到你这个堆栈溢出的线程来了需要是： 国庆节Web服务

在该线程链接到本网站服务顶端回答： http://www.holidaywebservice.com/

我不知道，如果使用网络服务的这种类型的事情是矫枉过正或没有，但肯定有一个更好的办法。 我很抱歉，我不是最有经验的程序员，所以我不能帮你，就像我想。



Answer 5:

我发现，最快的方式是使用一些数学（从借款SO后）： 

public static int totalBusinessDaysBetween(LocalDate start, LocalDate end) {
    Objects.requireNonNull(start, "Start date must not be null");
    Objects.requireNonNull(end, "End date must not be null");
    long daysBetweenWithoutWeekends = calculateNumberOfDaysBetweenMinusWeekends(start, end);
    final Set<LocalDate> holidayForYearRange = getUSFederalHolidayForYearRange(start.getYear(), end.getYear());
    for (LocalDate localDate : holidayForYearRange) {
        if (localDate.isAfter(start) && localDate.isBefore(end)) {
            daysBetweenWithoutWeekends--;
        }
    }
    return (int) daysBetweenWithoutWeekends;
}

和： 

private static long calculateNumberOfDaysBetweenMinusWeekends(LocalDate start, LocalDate end) {

    final DayOfWeek startW = start.getDayOfWeek();
    final DayOfWeek endW = end.getDayOfWeek();

    final long days = ChronoUnit.DAYS.between(start, end);
    final long daysWithoutWeekends = days - 2 * ((days + startW.getValue()) / 7);

    //adjust for starting and ending on a Sunday:
    return daysWithoutWeekends + (startW == DayOfWeek.SUNDAY ? 1 : 0) + (endW == DayOfWeek.SUNDAY ? 1 : 0);
}

我把东西更完整的一起在这里 。



文章来源: calculate business days including holidays
标签： java date calendar
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