获取特定日期范围

发布于 2024-10-28 05:04:36 字数 359 浏览 1 评论 0原文

我需要获得从上周三到昨天的日期范围。该节目每周三运行。这是好方法吗？如果该程序由于某种原因在星期二运行怎么办？我该如何让它发挥作用？谢谢。

Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DAY_OF_MONTH, -7);
Date transactionBeginDate = calendar.getTime();


calendar = Calendar.getInstance();
calendar.add(Calendar.DAY_OF_MONTH, -1);
Date transactionEndDate = calendar.getTime();

原文

I need to get a date range starting last Wednesday to yesterday. This program is run on every Wednesday. Is it the good way to do it? What if the program is run on a Tuesday for some reason? How do I make it work? Thanks.

Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DAY_OF_MONTH, -7);
Date transactionBeginDate = calendar.getTime();


calendar = Calendar.getInstance();
calendar.add(Calendar.DAY_OF_MONTH, -1);
Date transactionEndDate = calendar.getTime();

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深巷少女 2024-11-04 05:04:36

我将使用日历上的 DAY_OF_WEEK 值。

类似...

while(calendar.DAY_OF_WEEK != Calendar.WEDNESDAY){
    calendar.add(Calendar.DAY_OF_MONTH, -1);
}
Date transactionBeginDate = calendar.getTime();

如果您在星期四执行此操作，您最终会得到同一天的开始日期和结束日期。不过，您应该能够根据自己的喜好更好地调整它。

编辑

如果您想获得一整周的时间，无论程序何时运行，那么我认为您想从结束日期开始，然后获取开始日期...

Calendar calendar = Calendar.getInstance();
//Find last Wednesday to act as end date
while(calendar.DAY_OF_WEEK != Calendar.WEDNESDAY){
    calendar.add(Calendar.DAY_OF_MONTH, -1);
}
Date transactionEndDate = calendar.getTime();
//Go back one week from that Wednesday to get start date.
calendar.add(Calendar.DAY_OF_MONTH, -7);
Date transactionStartDate = calendar.getTime();

I would use the DAY_OF_WEEK value on the calendar.

Something like ...

while(calendar.DAY_OF_WEEK != Calendar.WEDNESDAY){
    calendar.add(Calendar.DAY_OF_MONTH, -1);
}
Date transactionBeginDate = calendar.getTime();

If you do this on a Thursday you'll end up getting your start and end dates as the same day. You should be able to better tweak it to your liking though.

edit

If you wanted to get a whole week regardless of when the program is run then I think you want to start with your end date and then get your start date...

Calendar calendar = Calendar.getInstance();
//Find last Wednesday to act as end date
while(calendar.DAY_OF_WEEK != Calendar.WEDNESDAY){
    calendar.add(Calendar.DAY_OF_MONTH, -1);
}
Date transactionEndDate = calendar.getTime();
//Go back one week from that Wednesday to get start date.
calendar.add(Calendar.DAY_OF_MONTH, -7);
Date transactionStartDate = calendar.getTime();

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