日期范围内的日期范围

实际上这个任务对我来说似乎很容易，但我有点卡住了，非常感谢一些提示：D

我有一些带有开始和结束时间的事件 - 我想创建一个包含日历周的表格。

因此，我编写了一个方法来检查本周内是否有事件，并将其着色如下：

private boolean inWeek(Date date, Entry pe) {
    return ((pe.getStartsAt().after(Util.firstDayOfWeek(date)) || pe.getStartsAt().equals(Util.firstDayOfWeek(date)))
     && (pe.getEndsAt().before(Util.lastDayOfWeek(date)) || pe.getEndsAt().equals(Util.lastDayOfWeek(date))));
}

如果事件只持续一周，这种情况还可以。但如果事件在本周之前开始，或者在本周之后结束，甚至持续几周呢？

它变得非常复杂，我当前的解决方案是这样的：

private boolean inWeek(Date date, Entry pe) {

    return  (  pe.getStartsAt().after(Util.firstDayOfWeek(date)) &&  pe.getEndsAt().after(Util.firstDayOfWeek(date)) && pe.getEndsAt().before(Util.lastDayOfWeek(date))    ) 
    ||      (  pe.getStartsAt().before(Util.lastDayOfWeek(date)) &&  pe.getStartsAt().after(Util.firstDayOfWeek(date)) &&  pe.getEndsAt().after(Util.lastDayOfWeek(date))  )
    ||      (  pe.getStartsAt().after(Util.firstDayOfWeek(date)) &&  pe.getEndsAt().before(Util.lastDayOfWeek(date))  )
    ||      (  pe.getStartsAt().before(Util.firstDayOfWeek(date)) && pe.getEndsAt().after(Util.lastDayOfWeek(date)) );

}

但在某些细胞中仍然没有显示出正确的颜色。有人对我有任何提示吗？

（...不建议乔达时间^^）

我花了相当多的时间闲逛……好吧，时间……我可以告诉你，我更愿意让别人为我做这项工作。

为此，如果您愿意尝试一下，我会看看JodaTime http://www.joda.org/joda-time/

基本上，这个例子的作用是创建一系列Intervals。一个是“期间”，或一年中的一周（从星期一开始到星期日结束）。

One Interval是一个重叠间隔，跨越“期间”之前一周和之后一周，另一个是单日Interval“期间”内

import org.joda.time.Interval;
import org.joda.time.MutableDateTime;
import org.joda.time.Period;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.DateTimeFormatterBuilder;
import org.joda.time.format.DateTimeParser;

public class TestTimeInterval {

    public static void main(String[] args) {

        DateTimeFormatter formatter = new DateTimeFormatterBuilder().
                        appendDayOfMonth(2).appendLiteral(" ").
                        appendDayOfWeekText().appendLiteral(" ").
                        appendMonthOfYearText().appendLiteral(" ").
                        appendYear(2, 2).
                        toFormatter();

        // Last week
        MutableDateTime targetStart = MutableDateTime.now();
        targetStart.setDayOfWeek(1);
        targetStart.addDays(-6);

        // Next week
        MutableDateTime targetEnd = MutableDateTime.now();
        targetEnd.setDayOfWeek(7);
        targetEnd.addDays(7);

        System.out.println("Target range = " + formatter.print(targetStart) + " to " + formatter.print(targetEnd));
        Interval targetInterval = new Interval(targetStart, targetEnd);

        // This week
        MutableDateTime start = MutableDateTime.now();
        start.setDayOfWeek(1);

        MutableDateTime end = MutableDateTime.now();
        end.setDayOfWeek(7);

        Interval interval = new Interval(start, end);

        System.out.println("Interval range = " + formatter.print(start) + " to " + formatter.print(end));
        System.out.println("Contains interval = " + targetInterval.contains(interval));

        // Last week
        targetStart = DateTime.now();

        // Next week
        targetEnd = DateTime.now();

        System.out.println("Target range = " + formatter.print(targetStart) + " to " + formatter.print(targetEnd));
        targetInterval = new Interval(targetStart, targetEnd);
        System.out.println("Contains interval = " + interval.contains(targetInterval));
    }

}

哪个输出...

Target range = 10 Tuesday December 2013 to 29 Sunday December 2013
Period range = 16 Monday December 2013 to 22 Sunday December 2013
Contains period = true
Target range = 19 Thursday December 2013 to 19 Thursday December 2013
Contains period = true

最终结果只需要通过两种方式检查周期间隔即可。

1. 检查“期间”是否在提供的范围内Interval and
2. 如果提供的Interval是在“期限”内...

例如...

 if (period.contains(interval) || interval.contains(period)) {
     // Match...
 }

现在，还有很多其他事情需要考虑，例如，时间是否对Intervals，您需要将时间归零（时间段的开始应该是午夜/早上，结束应该是午夜晚上），这样您就可以最大化捕获区域

更新以更好地利用 JodaTime 库

@BasilBourque 能够突出显示原始示例的一些问题，我已对其进行了相应的更新和测试。谢谢@BasilBourque

虽然与原版类似，但它更好地利用了JodaTime图书馆

public static void newWay() {

    DateTimeFormatter formatter = new DateTimeFormatterBuilder().
            appendDayOfMonth(2).appendLiteral(" ").
            appendDayOfWeekText().appendLiteral(" ").
            appendMonthOfYearText().appendLiteral(" ").
            appendYear(2, 2).
            toFormatter();

    // Last week
    DateTime targetStart = DateTime.now(DateTimeZone.getDefault()).
            withDayOfWeek(DateTimeConstants.MONDAY).
            minusDays(6);
    //MutableDateTime targetStart = MutableDateTime.now();
    //targetStart.setDayOfWeek(1);
    //targetStart.addDays(-6);

    // Next week
    DateTime targetEnd = DateTime.now(DateTimeZone.getDefault()).
            withDayOfWeek(DateTimeConstants.SUNDAY).
            plusDays(7);
    //MutableDateTime targetEnd = MutableDateTime.now();
    //targetEnd.setDayOfWeek(7);
    //targetEnd.addDays(7);

    System.out.println("Target range = " + formatter.print(targetStart) + " to " + formatter.print(targetEnd));
    Interval targetInterval = new Interval(targetStart, targetEnd);

    // This week
    DateTime start = DateTime.now(DateTimeZone.getDefault()).
            withDayOfWeek(DateTimeConstants.MONDAY);
    //MutableDateTime start = MutableDateTime.now();
    //start.setDayOfWeek(1);

    DateTime end = DateTime.now(DateTimeZone.getDefault()).
            withDayOfWeek(DateTimeConstants.SUNDAY);
    //MutableDateTime end = MutableDateTime.now();
    //end.setDayOfWeek(7);

    Interval interval = new Interval(start, end);

    System.out.println("Period range = " + formatter.print(start) + " to " + formatter.print(end));

    System.out.println("Contains period = " + targetInterval.contains(interval));

    // Last week
    targetStart = DateTime.now();

    // Next week
    targetEnd = DateTime.now();

    System.out.println("Target range = " + formatter.print(targetStart) + " to " + formatter.print(targetEnd));
    targetInterval = new Interval(targetStart, targetEnd);
    System.out.println("Contains period = " + interval.contains(targetInterval));

}