Question

我正在用Java编写程序，我需要确定某个日期是否是周末。但是，我需要考虑到，在不同的国家/地区，周末会在不同的日子出现，例如：在以色列，星期四和星期五在一些伊斯兰国家的星期五和星期六。有关详细信息，请查看this Wikipedia article。有一个简单的方法吗？

Answer 1

根据您发送的维基，我已使用以下代码为自己解决了这个问题：

private static final List<String> sunWeekendDaysCountries = Arrays.asList(new String[]{"GQ", "IN", "TH", "UG"});
private static final List<String> fryWeekendDaysCountries = Arrays.asList(new String[]{"DJ", "IR"});
private static final List<String> frySunWeekendDaysCountries = Arrays.asList(new String[]{"BN"});
private static final List<String> thuFryWeekendDaysCountries = Arrays.asList(new String[]{"AF"});
private static final List<String> frySatWeekendDaysCountries = Arrays.asList(new String[]{"AE", "DZ", "BH", "BD", "EG", "IQ", "IL", "JO", "KW", "LY", "MV", "MR", "OM", "PS", "QA", "SA", "SD", "SY", "YE"});

public static int[] getWeekendDays(Locale locale) {
    if (thuFryWeekendDaysCountries.contains(locale.getCountry())) {
        return new int[]{Calendar.THURSDAY, Calendar.FRIDAY};
    }
    else if (frySunWeekendDaysCountries.contains(locale.getCountry())) {
        return new int[]{Calendar.FRIDAY, Calendar.SUNDAY};
    }
    else if (fryWeekendDaysCountries.contains(locale.getCountry())) {
        return new int[]{Calendar.FRIDAY};
    }
    else if (sunWeekendDaysCountries.contains(locale.getCountry())) {
        return new int[]{Calendar.SUNDAY};
    }
    else if (frySatWeekendDaysCountries.contains(locale.getCountry())) {
        return new int[]{Calendar.FRIDAY, Calendar.SATURDAY};
    }
    else {
        return new int[]{Calendar.SATURDAY, Calendar.SUNDAY};
    }
}

Answer 2

您可以获取星期几（请参阅：How to determine day of week by passing specific date?）

然后根据选择的国家/地区检查当天是否是周末。

Answer 3

Java Calendar类具有此功能，getFirstDayOfWeek method。引自Calendar文档：

日历使用两个参数定义特定于语言环境的七天工作周：一周的第一天和第一周的最小天数（从1到7）。构建Calendar时，这些数字取自语言环境资源数据。也可以通过设置其值的方法明确指定它们。

因此，通过这些信息，您可以计算出某一天是否是周末。

    final Calendar cal = Calendar.getInstance(new Locale("he_IL"));
    System.out.println("Sunday is the first day of the week in he_IL? " + (Calendar.SUNDAY == cal.getFirstDayOfWeek()));

输出：

Sunday is the first day of the week in he_IL? true

Answer 4

图书馆 Jollyday 可用于计算假期，http://jollyday.sourceforge.net/index.html

考虑到Java当前的语言环境，如何检查某个日期是否是一个周末？

4 个答案: