我需要在我的脚本中通过一系列日期执行一些操作,给定一个起始和结束日期。
请为我提供使用Java实现此功能的指导。
for ( currentDate = starDate; currentDate < endDate; currentDate++) {
}
我知道上面的代码根本不可能实现,但我这样做是为了向您展示我想要实现的内容。
public class DateIterator implements Iterator<Date>, Iterable<Date>
{
private Calendar end = Calendar.getInstance();
private Calendar current = Calendar.getInstance();
public DateIterator(Date start, Date end)
{
this.end.setTime(end);
this.end.add(Calendar.DATE, -1);
this.current.setTime(start);
this.current.add(Calendar.DATE, -1);
}
@Override
public boolean hasNext()
{
return !current.after(end);
}
@Override
public Date next()
{
current.add(Calendar.DATE, 1);
return current.getTime();
}
@Override
public void remove()
{
throw new UnsupportedOperationException(
"Cannot remove");
}
@Override
public Iterator<Date> iterator()
{
return this;
}
}
Iterator<Date> dateIterator = new DateIterator(startDate, endDate);
while(dateIterator.hasNext()){
Date selectedDate = dateIterator .next();
}
long startDateEpoch = new java.text.SimpleDateFormat("dd/MM/yyyy").parse(startDate).getTime() / 1000;
long endDateEpoch = new java.text.SimpleDateFormat("dd/MM/yyyy").parse(endDate).getTime() / 1000;
long i;
for(i=startDateEpoch ; i<=endDateEpoch; i+=86400){
System.out.println(i);
}
OffsetDateTime currentDateTime = OffsetDateTime.now();
for (OffsetDateTime date = currentDateTime; date.isAfter(currentDateTime.minusYears(YEARS)); date = date.minusWeeks(1))
{
...
}
这将帮助您从30天前开始循环直至今天的日期。您可以轻松更改日期范围和方向。
private void iterateThroughDates() throws Exception {
Calendar start = Calendar.getInstance();
start.add(Calendar.DATE, -30);
Calendar end = Calendar.getInstance();
for (Calendar date = start; date.before(end); date.add(Calendar.DATE, 1))
{
System.out.println(date.getTime());
}
}
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
// Any chosen date format maybe taken
LocalDate startDate = LocalDate.parse(startDateString,formatter);
LocalDate endDate = LocalDate.parse(endDateString,formatter);
if(endDate.isBefore(startDate))
{
//error
}
LocalDate itr = null;
for (itr = startDate; itr.isBefore(endDate)||itr.isEqual(itr); itr = itr.plusDays(1))
{
//Processing goes here
}
可以选择plusMonths()/plusYears()来增加时间单位。 上面的示例是逐日递增。