以给定的日期和星期几的间隔返回日期列表作为布尔值 [英] Return a list of dates given an interval of dates and days of the week as booleans

问题描述

我正在尝试从这些参数返回日期列表：

I'm trying to return a list of dates from these parameters :

LocalDate startDate
LocalDate endDate
Boolean monday ... sunday : booleans

例如：

startDate = 01/03/2016
endDate = 10/03/2016 (included)
Monday = true;
Tuesday = false;
Wednesday = false;
Thursday = true;
Friday = true;
Saturday = false;
Sunday = false;

List of dates returned : [03/03/2016, 04/03/2016, 07/03/2016, 10/03/2016]

我可以使用任何libray吗？我只设法返回了两个日期之间的日期，但是我也不知道该如何使用日期：（我使用的是Java 6）

Is there any libray i can use ? I've only managed to returned the dates between two dates, but i have no idea how to use the days also : (I'm using java 6)

public List<LocalDate> datesBetween(LocalDate start, LocalDate end) {
    List<LocalDate> ret = new ArrayList<LocalDate>();
    for (LocalDate date = start; !date.isAfter(end); date = date.plusDays(1)) {
        ret.add(date);
    }
    return ret;
}

推荐答案

避免使用旧的日期时间类

避免与Java的早期版本捆绑在一起的旧日期时间类，例如java.util.Date/.Calendar。它们的设计欠佳，令人困惑且麻烦。

Avoid old date-time classes

Avoid the old date-time classes bundled with the earliest versions of Java, such as java.util.Date/.Calendar. They are poorly designed, confusing, and troublesome.

内置于java.time框架Java 8和更高版本取代了旧的日期时间类。请参见教程。

The java.time framework built into Java 8 and later supplants the old date-time classes. See Tutorial.

用于Java 6& 7，检查 ThreeTen-Backport 项目（ ThreeTen是指JSR 310定义java.time ）。对于专门针对Android的用户，请参见围绕Backport的Android包装器， ThreeTenABP 。

For use with Java 6 & 7, check out the ThreeTen-Backport project ('ThreeTen' refers to JSR 310 defining java.time). For Android specifically, see the Android wrapper around the Backport, ThreeTenABP.

新类包括 LocalDate ，它是仅包含日期的值，没有日期和时间段。您需要的另一个方便的类是枚举 DayOfWeek 。 使用这些对象而不是字符串来使您的代码类型安全，可自动记录文档并可以本地化。

The new classes include LocalDate for a date-only value without time-of-day and without time zone. Another handy class you need is the enum DayOfWeek. Use these objects rather than strings to make your code type-safe, self-documenting, and localization-ready.

提醒：Java提供了特殊的枚举的高性能 Set 和 Map 实现， EnumSet 和 EnumMap 。

Reminder: Java provides special high-performance Set and Map implementations for enums, EnumSet and EnumMap.

EnumSet<DayOfWeek> dayOfWeekSet = EnumSet.of( DayOfWeek.TUESDAY , DayOfWeek.THURSDAY );

定义日期间隔。

LocalDate start = LocalDate.of( 2016 , Month.MARCH , 1 );
LocalDate stop = start.plusDays( 10 );

定义一个集合以保留我们的预定日期。

Define a collection to keep our targeted dates.

List<LocalDate> localDates = new ArrayList<>();

在该间隔内增加天数。在日期时间工作中，我们通常使用半开放式方法，其中以 inclusive 开始，而以 exclusive 结尾。

Loop the days in that interval. In date-time work we commonly use the Half-Open approach where the beginning in inclusive while the ending is exclusive.

LocalDate localDate = start;
while ( localDate.isBefore( stop ) ) {
    if ( dayOfWeekSet.contains ( localDate.getDayOfWeek() ) ) {
        localDates.add( localDate );
    }
    // Prepare for next loop.
    localDate = localDate.plusDays( 1 );
}

转储到控制台。

System.out.println( "From: " + start + " to: " + stop + " the dates for days-of-week: " + dayOfWeekSet + " = " + localDates );

从：2016-03-01至：2016-03-11星期几的日期：[星期二，星期四] = [2016-03-01、2016-03-03、2016-03-08、2016-03-10]

From: 2016-03-01 to: 2016-03-11 the dates for days-of-week: [TUESDAY, THURSDAY] = [2016-03-01, 2016-03-03, 2016-03-08, 2016-03-10]

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关于 java.time

java.time 框架内置于Java 8及更高版本中。这些类取代了麻烦的旧旧版日期时间类，例如 java.util.Date ， Calendar ，& SimpleDateFormat 。

---

About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.

Joda-Time 项目，现在处于维护模式 ，建议迁移到 java.time 类。

The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.

要了解更多信息，请参见 Oracle教程 。并在Stack Overflow中搜索许多示例和说明。规范为 JSR 310 。

To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.

您可以直接与数据库交换 java.time 对象。使用符合 JDBC驱动程序 / jeps / 170 rel = nofollow noreferrer> JDBC 4.2 或更高版本。不需要字符串，不需要 java.sql。* 类。

You may exchange java.time objects directly with your database. Use a JDBC driver compliant with JDBC 4.2 or later. No need for strings, no need for java.sql.* classes.

在哪里获取java.time类？

Where to obtain the java.time classes?

• Java SE 8 ， Java SE 9 ， Java SE 10 ，以及后来的
  
  
  
  
  • 内置。
  
  
  • 具有捆绑实现的标准Java API的一部分。
  
  
  • Java 9添加了一些次要功能和修复。
  
  
  • Java SE 8, Java SE 9, Java SE 10, and later
    • Built-in.
    • Part of the standard Java API with a bundled implementation.
    • Java 9 adds some minor features and fixes.
    
    
    • 许多java.time功能都反向移植到Java 6& nofollow noreferrer> ThreeTen-Backport 。
    
    
    • Much of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
    
    
    • 较新版本的java.time类的Android捆绑实现。
    
    
    • 对于较早的Android（< 26）， ThreeTenABP 项目采用了 ThreeTen-Backport （如上所述）。请参阅 如何使用ThreeTenABP… 。
    
    
    • Later versions of Android bundle implementations of the java.time classes.
    • For earlier Android (<26), the ThreeTenABP project adapts ThreeTen-Backport (mentioned above). See How to use ThreeTenABP….

    ThreeTen-Extra 项目使用其他类扩展了java.time。该项目为将来可能在java.time中添加内容打下了基础。您可能会在这里找到一些有用的类，例如 时间间隔 ， YearWeek ， YearQuarter 和更多。

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