Question

无法计算年，月，日两个日期之间的差异。问题是每个月有30天，每年有365天，没有例外。这里有很多主题，但我没有找到任何可以解决我的问题或帮助它。我找到的每个主题都只是解决了正常方式计算差异的问题，这很简单。我该如何计算这种差异？

我正在使用Java 7（没有机会安装joda时间）和groovy 2.4.0。

例如：

date from    date to       y  m  d
2014-02-01 - 2015-02-01 => 1  0  1
2000-02-10 - 2003-01-18 => 2  11 9
2004-02-02 - 2004-06-24 => 0  4  23

感谢。

Answer 1

您的示例似乎不一致。在第一种情况下，结束日期是独占的，另外两种是包含它的。例如2015-01-01到2015-01-01应该给0d还是1d？假设独家，看起来你需要的就是这样：鉴于fromDate为yearFrom，monthFrom和daysFrom，toDate为yearTo，monthTo和daysTo：

days = -yearFrom*365-monthFrom*30-daysFrom+yearTo*365+monthTo*30+daysTo

假设365d年和30d月，

会给你几天的差异。然后，差异将是：

yearDifference = days/365 (as integer)
monthDifference = (days%365)/30
daysDifference = (days%365)%30

评论后修改：如果你需要它是包容性的，按照最后两个例子，只需在“天”中添加一个：

days = -yearFrom*365-monthFrom*30-daysFrom+yearTo*365+monthTo*30+daysTo+1

Answer 2

在Groovy中提出这个问题，不确定它是否符合您的要求，但它会在结果中提出问题：

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如果每个月有30天计算年，月，日的差异

2 个答案: