Java Joda Time - 实现日期范围迭代器 [英] Java Joda Time - Implement a Date range iterator

问题描述

我试图在没有成功的情况下实现具有Joda时间的Date迭代器。

我需要一些允许我从startDate到endDate的所有日子迭代
你有什么想法吗？

I'm trying to implement without success a Date iterator with Joda time.
I need something that allows me to iterate all the days form startDate to endDate
Do you have any idea on how to do that?

推荐答案

这是一个让你开始的事情。您可能想要考虑是否要在最终等待包容性或排他性。

Here's something to get you started. You may want to think about whether you want it to be inclusive or exclusive at the end, etc.

import org.joda.time.*;
import java.util.*;

class LocalDateRange implements Iterable<LocalDate>
{
    private final LocalDate start;
    private final LocalDate end;

    public LocalDateRange(LocalDate start,
                          LocalDate end)
    {
        this.start = start;
        this.end = end;
    }

    public Iterator<LocalDate> iterator()
    {
        return new LocalDateRangeIterator(start, end);
    }

    private static class LocalDateRangeIterator implements Iterator<LocalDate>
    {
        private LocalDate current;
        private final LocalDate end;

        private LocalDateRangeIterator(LocalDate start,
                                       LocalDate end)
        {
            this.current = start;
            this.end = end;
        }

        public boolean hasNext()
        {
            return current != null;
        }

        public LocalDate next()
        {
            if (current == null)
            {
                throw new NoSuchElementException();
            }
            LocalDate ret = current;
            current = current.plusDays(1);
            if (current.compareTo(end) > 0)
            {
                current = null;
            }
            return ret;
        }

        public void remove()
        {
            throw new UnsupportedOperationException();
        }
    }
}

class Test
{
    public static void main(String args[])
    {
        LocalDate start = new LocalDate(2009, 7, 20);
        LocalDate end = new LocalDate(2009, 8, 3);
        for (LocalDate date : new LocalDateRange(start, end))
        {
            System.out.println(date);
        }
    }
}

我在Java中编写了一个迭代器，所以我希望是正确的。我认为这是非常好的...

It's a while since I've written an iterator in Java, so I hope it's right. I think it's pretty much okay...

哦，对于C＃迭代器块，这就是我可以说...

Oh for C# iterator blocks, that's all I can say...

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