如何获取当前日期并在 Java 中添加五个工作日
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How to get current date and add five working days in Java
提问by Anup Ganatra
I want two dates. 1) Current date in MM/dd/yy format 2) Modified date which will be the adition of five business days(Mon-Fri) to current date and it should be in MMM dd, yyyy format.
我要两个约会。1) MM/dd/yy 格式的当前日期 2) 修改后的日期，即在当前日期的基础上增加五个工作日（周一至周五），它应该是 MMM dd, yyyy 格式。
So if my current is 9th june than currentDate should be 06/09/14 and modifiedDate should be Jun 13, 2014.
因此，如果我的当前日期是 6 月 9 日，则 currentDate 应该是 06/09/14，而 modifiedDate 应该是 2014 年 6 月 13 日。
How to do this?
这该怎么做？
采纳答案by Himanshu Tyagi
This will add working days (Mon-Fri) and will present dates in the required format.
这将增加工作日（周一至周五）并以所需格式显示日期。
Date date=new Date();
Calendar calendar = Calendar.getInstance();
date=calendar.getTime();
SimpleDateFormat s;
s=new SimpleDateFormat("MM/dd/yy");
System.out.println(s.format(date));
int days = 5;
for(int i=0;i<days;)
{
calendar.add(Calendar.DAY_OF_MONTH, 1);
//here even sat and sun are added
//but at the end it goes to the correct week day.
//because i is only increased if it is week day
if(calendar.get(Calendar.DAY_OF_WEEK)<=5)
{
i++;
}
}
date=calendar.getTime();
s=new SimpleDateFormat("MMM dd, yyyy");
System.out.println(s.format(date));
Ref : https://stackoverflow.com/a/15339851/3603806and https://stackoverflow.com/a/11356123/3603806
参考：https: //stackoverflow.com/a/15339851/3603806和 https://stackoverflow.com/a/11356123/3603806
回答by indika
Here is the code sample to add dates. You may modify in order to you can only add business days.
这是添加日期的代码示例。您可以修改以便您只能添加工作日。
SimpleDateFormat sdf1 = new SimpleDateFormat("MM/dd/yy");
SimpleDateFormat sdf2 = new SimpleDateFormat("MMM dd, yyyy");
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
System.out.println(sdf1.format(calendar.getTime()));
calendar.add(Calendar.DATE,6);
System.out.println(sdf2.format(calendar.getTime()));
回答by Oliv
The notion of working days is not implemented in Java, it's too subject to interpretation (for example, many international companies have their own holidays). Code below uses isWorkingDay(), which only returns false for weekends - add your holidays there.
工作日的概念在 Java 中没有实现，它太容易解释（例如，许多国际公司都有自己的假期）。下面的代码使用isWorkingDay()，它只在周末返回 false - 在那里添加你的假期。
public class Test {
public static void main(String[] args) {
Calendar cal = new GregorianCalendar();
// cal now contains current date
System.out.println(cal.getTime());
// add the working days
int workingDaysToAdd = 5;
for (int i=0; i<workingDaysToAdd; i++)
do {
cal.add(Calendar.DAY_OF_MONTH, 1);
} while ( ! isWorkingDay(cal));
System.out.println(cal.getTime());
}
private static boolean isWorkingDay(Calendar cal) {
int dayOfWeek = cal.get(Calendar.DAY_OF_WEEK);
if (dayOfWeek == Calendar.SUNDAY || dayOfWeek == Calendar.SATURDAY)
return false;
// tests for other holidays here
// ...
return true;
}
}
