如何获取上个月的第一个日期和最后一个日期?(爪哇)

问题描述：

使用今天的日期，我应该得到上个月的第一个日期和最后一个日期.我无法想出任何逻辑.

With today's date, I should get the first date and last date of the previous month. I am unable to come up with any logic.

例如，通过 05/30/2012，我应该得到 04/01/2012 和 04/30/2012.

For example, on passing 05/30/2012, I should get 04/01/2012 and 04/30/2012.

任何帮助将不胜感激.谢谢.

Any help will be much appreciated. Thanks.

答

With 日历

Calendar cal = Calendar.getInstance();
cal.add(Calendar.MONTH, -1);
cal.set(Calendar.DATE, 1);
Date firstDateOfPreviousMonth = cal.getTime();

cal.set(Calendar.DATE, cal.getActualMaximum(Calendar.DATE)); // changed calendar to cal

Date lastDateOfPreviousMonth = cal.getTime();

见

ideone 演示

如何获取上个月的第一个日期和最后一个日期?(爪哇)

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