这将增加工作日（周一至周五），并以所需格式显示日期。
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
public class BusinessDateExamples {
private static final List<Integer> NON_BUSINESS_DAYS = Arrays.asList(
Calendar.SATURDAY,
Calendar.SUNDAY
);
/**
* Returns past or future business date
* @param date starting date
* @param businessDays number of business days to add/subtract
* <br/>note: set this as negative value to get past date
* @return past or future business date by the number of businessDays value
*/
public static Date businessDaysFrom(Date date, int businessDays) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
for (int i = 0; i < Math.abs(businessDays);) {
// here, all days are added/subtracted
calendar.add(Calendar.DAY_OF_MONTH, businessDays > 0 ? 1 : -1);
// but at the end it goes to the correct week day.
// because i is only increased if it is a week day
if (!NON_BUSINESS_DAYS.contains(calendar.get(Calendar.DAY_OF_WEEK))){
i++;
}
}
return calendar.getTime();
}
public static void main(String...strings) {
SimpleDateFormat s = new SimpleDateFormat("MM/dd/yy ( MMM dd, yyyy )");
Date date = new Date();
int businessDays = 5;
System.out.println(s.format(date));
System.out.print("+ " + businessDays + " Business Days = ");
System.out.println(s.format(businessDaysFrom(date, businessDays)));
System.out.print("- " + businessDays + " Business Days = ");
System.out.println(s.format(businessDaysFrom(date, -1 * businessDays)));
}
}
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));
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