blocks|key|3355942|text|这似乎是日期计算的常见问题。我经常因为建议使用JodaTime而不寒而栗，但它似乎是Java事实上的Date+API。如果您想要冒险，那么实现一个具有基于年份的日期的类是微不足道的。所以我们知道在美国城镇，4th+of+July遵守这些rules|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3355943|联邦法律(5+U.S.C.+6103)为联邦雇员规定了下列公共假日。请注意，大多数联邦雇员的工作时间是从星期一到星期五。对于这些雇员来说，当假日适逢非工作日时--星期六或星期日--假日通常在星期一(如果假日在星期天)或星期五(如果假日在星期六)。|3355944|因此，有了这些知识，您就可以计算出一周中的哪一天放假，并从两个范围之间的天数中减去该值。|3355945|entityMap|0|LINK|mutability|MUTABLE|url|http://www.opm.gov/Operating_Status_Schedules/fedhol/2012.asp^0|N|8|2V|B|3A|5|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]|$9|U|A|V|B|C]]|D|@$9|W|A|X|1|Y]]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|10|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]]]

This seems to be a common problem with Date calculations. I often shudder at suggesting to use <code>JodaTime</code>, but it seems to be the de facto Date API for Java. If you want to be adventurous it is trivial to implement a class that has dates based on the year. So we know that in America town that the <code>4th of July</code> abides by these <a href="http://www.opm.gov/Operating_Status_Schedules/fedhol/2012.asp" rel="nofollow">rules</a>

"Federal law (5 U.S.C. 6103) establishes the following public holidays for Federal employees. Please note that most Federal employees work on a Monday through Friday schedule. For these employees, when a holiday falls on a nonworkday -- Saturday or Sunday -- the holiday usually is observed on Monday (if the holiday falls on Sunday) or Friday (if the holiday falls on Saturday)." 

So given this knowledge you could calculate what day of the week a holiday would occur and subtract that value from the number of days between two ranges.

blocks|key|4783866|text|最后是一个基于Calendar接口的解决方案：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4783867|/**
+*+Handles+holidays+by+country.
+*/
public+enum+Holidays+{

++/**
+++*+See+<a+href="http://www.wikiwand.com/en/Public_holidays_in_France">http://www.wikiwand.com/en/Public_holidays_in_France</a>.
+++*/
++FRANCE+{

++++@Override
++++protected+void+addFixedHolidays(Set<Holiday>+holidays)+{
++++++holidays.add(new+Holiday(Calendar.JANUARY,+1));
++++++holidays.add(new+Holiday(Calendar.MAY,+1));
++++++holidays.add(new+Holiday(Calendar.MAY,+8));
++++++holidays.add(new+Holiday(Calendar.JULY,+14));
++++++holidays.add(new+Holiday(Calendar.AUGUST,+15));
++++++holidays.add(new+Holiday(Calendar.NOVEMBER,+1));
++++++holidays.add(new+Holiday(Calendar.NOVEMBER,+11));
++++++holidays.add(new+Holiday(Calendar.DECEMBER,+25));
++++}

++++@Override
++++protected+void+addVariableHolidays(int+year,+Set<Holiday>+holidays)+{
++++++Date+easterSunday+=+getEasterSunday(year);
++++++holidays.add(new+Holiday(getEasterMonday(easterSunday)));
++++++holidays.add(new+Holiday(getAscensionThursday(easterSunday)));
++++++holidays.add(new+Holiday(getPentecostMonday(easterSunday)));
++++}

++},

++/**
+++*+See+<a+href="http://www.wikiwand.com/en/Public_holidays_in_the_United_Kingdom">http://www.wikiwand.com/en/Public_holidays_in_the_United_Kingdom</a>.
+++*/
++ENGLAND+{

++++@Override
++++protected+void+addFixedHolidays(Set<Holiday>+holidays)+{
++++++holidays.add(new+Holiday(Calendar.JANUARY,+1));
++++++holidays.add(new+Holiday(Calendar.DECEMBER,+25));
++++++holidays.add(new+Holiday(Calendar.DECEMBER,+26));
++++}

++++@Override
++++protected+void+addVariableHolidays(int+year,+Set<Holiday>+holidays)+{
++++++Date+easterSunday+=+getEasterSunday(year);
++++++holidays.add(new+Holiday(getGoodFriday(easterSunday)));
++++++holidays.add(new+Holiday(getEasterMonday(easterSunday)));
++++++holidays.add(new+Holiday(get(WeekdayIndex.FIRST,+Calendar.MONDAY,+Calendar.MAY,+year)));
++++++holidays.add(new+Holiday(get(WeekdayIndex.LAST,+Calendar.MONDAY,+Calendar.MAY,+year)));
++++++holidays.add(new+Holiday(get(WeekdayIndex.LAST,+Calendar.MONDAY,+Calendar.AUGUST,+year)));
++++++Holiday+christmasDay+=+new+Holiday(Calendar.DECEMBER,+25);
++++++if+(christmasDay.isWeekend(year))+{
++++++++holidays.add(new+Holiday(Calendar.DECEMBER,+27));
++++++}
++++++Holiday+boxingDay+=+new+Holiday(Calendar.DECEMBER,+26);
++++++if+(boxingDay.isWeekend(year))+{
++++++++holidays.add(new+Holiday(Calendar.DECEMBER,+28));
++++++}
++++}

++};

++public+class+HolidayException+extends+Exception+{

++++private+static+final+long+serialVersionUID+=+1L;

++++private+HolidayException(String+message)+{
++++++super(message);
++++}

++}

++/**
+++*+A+holiday+is+defined+by+a+{@link+Calendar#MONTH}+and+a+{@link+Calendar#DAY_OF_MONTH}.
+++*/
++private+class+Holiday+{

++++private+final+int+day;
++++private+final+int+month;

++++public+Holiday(Date+date)+{
++++++Calendar+calendar+=+Calendar.getInstance();
++++++calendar.setTime(date);
++++++month+=+calendar.get(Calendar.MONTH);
++++++day+=+calendar.get(Calendar.DAY_OF_MONTH);
++++}

++++public+Holiday(int+month,+int+day)+{
++++++this.month+=+month;
++++++this.day+=+day;
++++}

++++public+Date+toDate(int+year)+{
++++++Calendar+calendar+=+Calendar.getInstance();
++++++calendar.set(year,+month,+day);
++++++return+calendar.getTime();
++++}

++++public+boolean+isWeekend(int+year)+{
++++++Calendar+calendar+=+Calendar.getInstance();
++++++calendar.setTime(toDate(year));
++++++int+dayOfWeek+=+calendar.get(Calendar.DAY_OF_WEEK);
++++++return+dayOfWeek+==+Calendar.SATURDAY+%7C%7C+dayOfWeek+==+Calendar.SUNDAY;
++++}

++++@Override
++++public+boolean+equals(Object+obj)+{
++++++if+(this+==+obj)+{
++++++++return+true;
++++++}+else+if+(!(obj+instanceof+Holiday))+{
++++++++return+false;
++++++}+else+{
++++++++Holiday+holiday+=+(Holiday)+obj;
++++++++return+holiday.month+==+month+&&+holiday.day+==+day;
++++++}
++++}

++++@Override
++++public+int+hashCode()+{
++++++return+Arrays.hashCode(new+int[]+{+month,+day+});
++++}

++}

++/**
+++*+Use+with+{@link+Holidays#get(WeekdayIndex,+int,+int,+int)}.<br+/>
+++*+<br+/>
+++*+Example:+<code>Holidays.get(WeekdayIndex.FIRST,+Calendar.MONDAY,+Calendar.MAY,+2000)</code>.
+++*/
++public+enum+WeekdayIndex+{

++++FIRST(1),+SECOND(2),+THIRD(3),+FOURTH(4),+LAST(null);

++++private+final+Integer+index;

++++private+WeekdayIndex(Integer+index)+{
++++++this.index+=+index;
++++}

++++private+boolean+is(int+count)+{
++++++return+index+!=+null+&&+index+==+count;
++++}

++}

++private+final+Set<Holiday>+fixedHolidays+=+new+HashSet<Holiday>();

++private+final+Map<Integer,+Set<Holiday>>+variableHolidays+=+new+HashMap<Integer,+Set<Holiday>>();

++private+Holidays()+{
++++addFixedHolidays(fixedHolidays);
++}

++protected+abstract+void+addFixedHolidays(Set<Holiday>+holidays);

++protected+abstract+void+addVariableHolidays(int+year,+Set<Holiday>+holidays);

++/**
+++*+Returns+the+number+of+business+days+between+two+dates.
+++*+
+++*+@param+d1
+++*++++++++++The+first+date.
+++*+@param+d2
+++*++++++++++The+second+date.
+++*+@return+The+number+of+business+days+between+the+two+provided+dates.
+++*+@throws+HolidayException
+++*+++++++++++If+<code>d1</code>+or+<code>d2</code>+is+not+a+business+day.
+++*/
++public+int+getBusinessDayCount(Date+d1,+Date+d2)+throws+HolidayException+{
++++Calendar+calendar+=+Calendar.getInstance();
++++DateFormat+formatter+=+new+SimpleDateFormat("yyyy-MM-dd");
++++try+{
++++++d1+=+formatter.parse(formatter.format(d1));
++++++d2+=+formatter.parse(formatter.format(d2));
++++}+catch+(ParseException+ignore)+{
++++++//+cannot+happen
++++}
++++if+(!isBusinessDay(d1)+%7C%7C+!isBusinessDay(d2))+{
++++++throw+new+HolidayException("Input+dates+must+be+business+days");
++++}
++++int+businessDayCount+=+0;
++++Date+min+=+d1.before(d2)+?+d1+:+d2;
++++Date+max+=+min.equals(d2)+?+d1+:+d2;
++++calendar.setTime(min);
++++while+(calendar.getTime().before(max))+{
++++++calendar.add(Calendar.DAY_OF_MONTH,+1);
++++++if+(isBusinessDay(calendar.getTime()))+{
++++++++businessDayCount%2B%2B;
++++++}
++++}
++++return+businessDayCount;
++}

++/**
+++*+Returns+whether+a+date+is+a+business+day.
+++*+
+++*+@param+date
+++*++++++++++The+date.
+++*+@return+<code>true</code>+if+the+<code>date</code>+is+a+business+day,+<code>false</code>+otherwise.
+++*/
++public+boolean+isBusinessDay(Date+date)+{
++++Calendar+calendar+=+Calendar.getInstance();
++++calendar.setTime(date);
++++int+dayOfWeek+=+calendar.get(Calendar.DAY_OF_WEEK);
++++if+(dayOfWeek+==+Calendar.SATURDAY+%7C%7C+dayOfWeek+==+Calendar.SUNDAY)+{
++++++return+false;
++++}+else+if+(isFixedHoliday(date))+{
++++++return+false;
++++}+else+if+(isVariableHoliday(date))+{
++++++return+false;
++++}
++++return+true;
++}

++private+boolean+isFixedHoliday(Date+date)+{
++++return+fixedHolidays.contains(new+Holiday(date));
++}

++private+boolean+isVariableHoliday(Date+date)+{
++++Calendar+calendar+=+Calendar.getInstance();
++++calendar.setTime(date);
++++int+year+=+calendar.get(Calendar.YEAR);
++++Set<Holiday>+yearHolidays;
++++if+(!variableHolidays.containsKey(year))+{
++++++//+variable+holidays+have+not+been+calculated+for+this+year+yet
++++++yearHolidays+=+new+HashSet<Holiday>();
++++++addVariableHolidays(year,+yearHolidays);
++++++variableHolidays.put(year,+yearHolidays);
++++}+else+{
++++++yearHolidays+=+variableHolidays.get(year);
++++}
++++return+yearHolidays.contains(new+Holiday(date));
++}

++public+static+Date+getEasterSunday(int+year)+{
++++//+credits:+https://www.wikiwand.com/en/Computus#/Anonymous_Gregorian_algorithm
++++Calendar+calendar+=+Calendar.getInstance();
++++int+initialYear+=+year;
++++if+(year+<+1900)+{
++++++year+%2B=+1900;
++++}
++++int+a+=+year+%25+19;
++++int+b+=+year+/+100;
++++int+c+=+year+%25+100;
++++int+d+=+b+/+4;
++++int+e+=+b+%25+4;
++++int+f+=+(b+%2B+8)+/+25;
++++int+g+=+(b+-+f+%2B+1)+/+3;
++++int+h+=+(19+*+a+%2B+b+-+d+-+g+%2B+15)+%25+30;
++++int+i+=+c+/+4;
++++int+j+=+c+%25+4;
++++int+k+=+(32+%2B+2+*+e+%2B+2+*+i+-+h+-+j)+%25+7;
++++int+l+=+(a+%2B+11+*+h+%2B+22+*+k)+/+451;
++++int+m+=+(h+%2B+k+-+7+*+l+%2B+114)+%25+31;
++++int+month+=+(h+%2B+k+-+7+*+l+%2B+114)+/+31+-+1;
++++int+day+=+m+%2B+1;
++++calendar.set(initialYear,+month,+day);
++++return+calendar.getTime();
++}

++public+static+Date+getGoodFriday(Date+easterSunday)+{
++++Calendar+calendar+=+Calendar.getInstance();
++++calendar.setTime(easterSunday);
++++calendar.add(Calendar.DAY_OF_MONTH,+-2);
++++return+calendar.getTime();
++}

++public+static+Date+getEasterMonday(Date+easterSunday)+{
++++Calendar+calendar+=+Calendar.getInstance();
++++calendar.setTime(easterSunday);
++++calendar.add(Calendar.DAY_OF_MONTH,+1);
++++return+calendar.getTime();
++}

++public+static+Date+getAscensionThursday(Date+easterSunday)+{
++++Calendar+calendar+=+Calendar.getInstance();
++++calendar.setTime(easterSunday);
++++calendar.add(Calendar.DAY_OF_MONTH,+39);
++++return+calendar.getTime();
++}

++public+static+Date+getPentecostMonday(Date+easterSunday)+{
++++Calendar+calendar+=+Calendar.getInstance();
++++calendar.setTime(easterSunday);
++++calendar.add(Calendar.DAY_OF_MONTH,+50);
++++return+calendar.getTime();
++}

++public+static+Date+get(WeekdayIndex+weekdayIndex,+int+dayOfWeek,+int+month,+int+year)+{
++++Calendar+calendar+=+Calendar.getInstance();
++++calendar.set(year,+month,+1);
++++int+count+=+0;
++++Date+last+=+null;
++++do+{
++++++if+(calendar.get(Calendar.DAY_OF_WEEK)+==+dayOfWeek)+{
++++++++count%2B%2B;
++++++++last+=+calendar.getTime();
++++++++if+(weekdayIndex.is(count))+{
++++++++++return+last;
++++++++}
++++++}
++++++calendar.add(Calendar.DAY_OF_MONTH,+1);
++++}+while+(calendar.get(Calendar.MONTH)+==+month);
++++if+(weekdayIndex.equals(WeekdayIndex.LAST))+{
++++++return+last;
++++}
++++return+null;
++}

}|code-block|syntax|javascript|4783868|通过以下方式进行呼叫：|4783869|Holidays.FRANCE.getBusinessDayCount(d1,+d2);|4783870|entityMap^0|7|8|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

Here is finally a solution based on the <code>Calendar</code> API:

<pre class="lang-java prettyprint-override"><code>/**
 * Handles holidays by country.
 */
public enum Holidays {

 /**
 * See &lt;a href="http://www.wikiwand.com/en/Public_holidays_in_France"&gt;http://www.wikiwand.com/en/Public_holidays_in_France&lt;/a&gt;.
 */
 FRANCE {

 @Override
 protected void addFixedHolidays(Set&lt;Holiday&gt; holidays) {
 holidays.add(new Holiday(Calendar.JANUARY, 1));
 holidays.add(new Holiday(Calendar.MAY, 1));
 holidays.add(new Holiday(Calendar.MAY, 8));
 holidays.add(new Holiday(Calendar.JULY, 14));
 holidays.add(new Holiday(Calendar.AUGUST, 15));
 holidays.add(new Holiday(Calendar.NOVEMBER, 1));
 holidays.add(new Holiday(Calendar.NOVEMBER, 11));
 holidays.add(new Holiday(Calendar.DECEMBER, 25));
 }

 @Override
 protected void addVariableHolidays(int year, Set&lt;Holiday&gt; holidays) {
 Date easterSunday = getEasterSunday(year);
 holidays.add(new Holiday(getEasterMonday(easterSunday)));
 holidays.add(new Holiday(getAscensionThursday(easterSunday)));
 holidays.add(new Holiday(getPentecostMonday(easterSunday)));
 }

 },

 /**
 * See &lt;a href="http://www.wikiwand.com/en/Public_holidays_in_the_United_Kingdom"&gt;http://www.wikiwand.com/en/Public_holidays_in_the_United_Kingdom&lt;/a&gt;.
 */
 ENGLAND {

 @Override
 protected void addFixedHolidays(Set&lt;Holiday&gt; holidays) {
 holidays.add(new Holiday(Calendar.JANUARY, 1));
 holidays.add(new Holiday(Calendar.DECEMBER, 25));
 holidays.add(new Holiday(Calendar.DECEMBER, 26));
 }

 @Override
 protected void addVariableHolidays(int year, Set&lt;Holiday&gt; holidays) {
 Date easterSunday = getEasterSunday(year);
 holidays.add(new Holiday(getGoodFriday(easterSunday)));
 holidays.add(new Holiday(getEasterMonday(easterSunday)));
 holidays.add(new Holiday(get(WeekdayIndex.FIRST, Calendar.MONDAY, Calendar.MAY, year)));
 holidays.add(new Holiday(get(WeekdayIndex.LAST, Calendar.MONDAY, Calendar.MAY, year)));
 holidays.add(new Holiday(get(WeekdayIndex.LAST, Calendar.MONDAY, Calendar.AUGUST, year)));
 Holiday christmasDay = new Holiday(Calendar.DECEMBER, 25);
 if (christmasDay.isWeekend(year)) {
 holidays.add(new Holiday(Calendar.DECEMBER, 27));
 }
 Holiday boxingDay = new Holiday(Calendar.DECEMBER, 26);
 if (boxingDay.isWeekend(year)) {
 holidays.add(new Holiday(Calendar.DECEMBER, 28));
 }
 }

 };

 public class HolidayException extends Exception {

 private static final long serialVersionUID = 1L;

 private HolidayException(String message) {
 super(message);
 }

 }

 /**
 * A holiday is defined by a {@link Calendar#MONTH} and a {@link Calendar#DAY_OF_MONTH}.
 */
 private class Holiday {

 private final int day;
 private final int month;

 public Holiday(Date date) {
 Calendar calendar = Calendar.getInstance();
 calendar.setTime(date);
 month = calendar.get(Calendar.MONTH);
 day = calendar.get(Calendar.DAY_OF_MONTH);
 }

 public Holiday(int month, int day) {
 this.month = month;
 this.day = day;
 }

 public Date toDate(int year) {
 Calendar calendar = Calendar.getInstance();
 calendar.set(year, month, day);
 return calendar.getTime();
 }

 public boolean isWeekend(int year) {
 Calendar calendar = Calendar.getInstance();
 calendar.setTime(toDate(year));
 int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
 return dayOfWeek == Calendar.SATURDAY || dayOfWeek == Calendar.SUNDAY;
 }

 @Override
 public boolean equals(Object obj) {
 if (this == obj) {
 return true;
 } else if (!(obj instanceof Holiday)) {
 return false;
 } else {
 Holiday holiday = (Holiday) obj;
 return holiday.month == month &amp;&amp; holiday.day == day;
 }
 }

 @Override
 public int hashCode() {
 return Arrays.hashCode(new int[] { month, day });
 }

 }

 /**
 * Use with {@link Holidays#get(WeekdayIndex, int, int, int)}.&lt;br /&gt;
 * &lt;br /&gt;
 * Example: &lt;code&gt;Holidays.get(WeekdayIndex.FIRST, Calendar.MONDAY, Calendar.MAY, 2000)&lt;/code&gt;.
 */
 public enum WeekdayIndex {

 FIRST(1), SECOND(2), THIRD(3), FOURTH(4), LAST(null);

 private final Integer index;

 private WeekdayIndex(Integer index) {
 this.index = index;
 }

 private boolean is(int count) {
 return index != null &amp;&amp; index == count;
 }

 }

 private final Set&lt;Holiday&gt; fixedHolidays = new HashSet&lt;Holiday&gt;();

 private final Map&lt;Integer, Set&lt;Holiday&gt;&gt; variableHolidays = new HashMap&lt;Integer, Set&lt;Holiday&gt;&gt;();

 private Holidays() {
 addFixedHolidays(fixedHolidays);
 }

 protected abstract void addFixedHolidays(Set&lt;Holiday&gt; holidays);

 protected abstract void addVariableHolidays(int year, Set&lt;Holiday&gt; holidays);

 /**
 * Returns the number of business days between two dates.
 * 
 * @param d1
 * The first date.
 * @param d2
 * The second date.
 * @return The number of business days between the two provided dates.
 * @throws HolidayException
 * If &lt;code&gt;d1&lt;/code&gt; or &lt;code&gt;d2&lt;/code&gt; is not a business day.
 */
 public int getBusinessDayCount(Date d1, Date d2) throws HolidayException {
 Calendar calendar = Calendar.getInstance();
 DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
 try {
 d1 = formatter.parse(formatter.format(d1));
 d2 = formatter.parse(formatter.format(d2));
 } catch (ParseException ignore) {
 // cannot happen
 }
 if (!isBusinessDay(d1) || !isBusinessDay(d2)) {
 throw new HolidayException("Input dates must be business days");
 }
 int businessDayCount = 0;
 Date min = d1.before(d2) ? d1 : d2;
 Date max = min.equals(d2) ? d1 : d2;
 calendar.setTime(min);
 while (calendar.getTime().before(max)) {
 calendar.add(Calendar.DAY_OF_MONTH, 1);
 if (isBusinessDay(calendar.getTime())) {
 businessDayCount++;
 }
 }
 return businessDayCount;
 }

 /**
 * Returns whether a date is a business day.
 * 
 * @param date
 * The date.
 * @return &lt;code&gt;true&lt;/code&gt; if the &lt;code&gt;date&lt;/code&gt; is a business day, &lt;code&gt;false&lt;/code&gt; otherwise.
 */
 public boolean isBusinessDay(Date date) {
 Calendar calendar = Calendar.getInstance();
 calendar.setTime(date);
 int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
 if (dayOfWeek == Calendar.SATURDAY || dayOfWeek == Calendar.SUNDAY) {
 return false;
 } else if (isFixedHoliday(date)) {
 return false;
 } else if (isVariableHoliday(date)) {
 return false;
 }
 return true;
 }

 private boolean isFixedHoliday(Date date) {
 return fixedHolidays.contains(new Holiday(date));
 }

 private boolean isVariableHoliday(Date date) {
 Calendar calendar = Calendar.getInstance();
 calendar.setTime(date);
 int year = calendar.get(Calendar.YEAR);
 Set&lt;Holiday&gt; yearHolidays;
 if (!variableHolidays.containsKey(year)) {
 // variable holidays have not been calculated for this year yet
 yearHolidays = new HashSet&lt;Holiday&gt;();
 addVariableHolidays(year, yearHolidays);
 variableHolidays.put(year, yearHolidays);
 } else {
 yearHolidays = variableHolidays.get(year);
 }
 return yearHolidays.contains(new Holiday(date));
 }

 public static Date getEasterSunday(int year) {
 // credits: https://www.wikiwand.com/en/Computus#/Anonymous_Gregorian_algorithm
 Calendar calendar = Calendar.getInstance();
 int initialYear = year;
 if (year &lt; 1900) {
 year += 1900;
 }
 int a = year % 19;
 int b = year / 100;
 int c = year % 100;
 int d = b / 4;
 int e = b % 4;
 int f = (b + 8) / 25;
 int g = (b - f + 1) / 3;
 int h = (19 * a + b - d - g + 15) % 30;
 int i = c / 4;
 int j = c % 4;
 int k = (32 + 2 * e + 2 * i - h - j) % 7;
 int l = (a + 11 * h + 22 * k) / 451;
 int m = (h + k - 7 * l + 114) % 31;
 int month = (h + k - 7 * l + 114) / 31 - 1;
 int day = m + 1;
 calendar.set(initialYear, month, day);
 return calendar.getTime();
 }

 public static Date getGoodFriday(Date easterSunday) {
 Calendar calendar = Calendar.getInstance();
 calendar.setTime(easterSunday);
 calendar.add(Calendar.DAY_OF_MONTH, -2);
 return calendar.getTime();
 }

 public static Date getEasterMonday(Date easterSunday) {
 Calendar calendar = Calendar.getInstance();
 calendar.setTime(easterSunday);
 calendar.add(Calendar.DAY_OF_MONTH, 1);
 return calendar.getTime();
 }

 public static Date getAscensionThursday(Date easterSunday) {
 Calendar calendar = Calendar.getInstance();
 calendar.setTime(easterSunday);
 calendar.add(Calendar.DAY_OF_MONTH, 39);
 return calendar.getTime();
 }

 public static Date getPentecostMonday(Date easterSunday) {
 Calendar calendar = Calendar.getInstance();
 calendar.setTime(easterSunday);
 calendar.add(Calendar.DAY_OF_MONTH, 50);
 return calendar.getTime();
 }

 public static Date get(WeekdayIndex weekdayIndex, int dayOfWeek, int month, int year) {
 Calendar calendar = Calendar.getInstance();
 calendar.set(year, month, 1);
 int count = 0;
 Date last = null;
 do {
 if (calendar.get(Calendar.DAY_OF_WEEK) == dayOfWeek) {
 count++;
 last = calendar.getTime();
 if (weekdayIndex.is(count)) {
 return last;
 }
 }
 calendar.add(Calendar.DAY_OF_MONTH, 1);
 } while (calendar.get(Calendar.MONTH) == month);
 if (weekdayIndex.equals(WeekdayIndex.LAST)) {
 return last;
 }
 return null;
 }

}
</code></pre>

Calling with:

<pre class="lang-java prettyprint-override"><code>Holidays.FRANCE.getBusinessDayCount(d1, d2);
</code></pre>

How can I get the number of business days between two <code>java.util.Date</code>, i.e. excluding weekends and holidays? By holidays, I mean <a href="http://feiertagskalender.ch/index.php?geo=3537&amp;hl=en" rel="nofollow">legally recognized holidays</a>. It must be depending on the country, because of the holidays that are different from a country to another.

For example, <code>2012-08-27 - 2012-08-24</code> should return <code>1</code> instead of <code>3</code>, because of the weekend inbetween.

I already had a look on <a href="http://jollyday.sourceforge.net/" rel="nofollow">Jollyday</a> and <a href="http://objectlabkit.sourceforge.net/" rel="nofollow">ObjectLab-Kit</a>, but I can't make them meet my need. I mean, both of them have a lot of interesting methods, but can't find something like <code>getBusinessDaysCount(Date d1, Date d2)</code>...

Difference between two dates, including only business days (i.e. excluding weekends and holidays)

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何获取两个java.util.Date之间的营业天数，即不包括周末和节假日？说到假期，我指的是。它必须取决于国家，因为不同的国家的假日是不同的。例如，2012-08-27 - 2012-08-24应该返回1而不是3，因为两者之间是周末。我已经在和上看过了，但我不能让它们满足我的需求。我的意思是，他们都有很多有趣的方法...

问两个日期之间的差异，仅包括工作日(即不包括周末和节假日)
EN

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问两个日期之间的差异，仅包括工作日(即不包括周末和节假日)EN