How to check if date exceeds more than seven days [duplicate]

问题

I would like to check if two date exceeds a week, like, check if two dates have seven days,

at point the data range should be within a week only(7 Days).

i have tried something like this,

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class IsDateRangeExceedsWeek 
{
    public static void main( String[] args ) 
    {
        try{

            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            Date fromDate = sdf.parse("2015-05-01");
            Date toDate = sdf.parse("2015-05-07");

            System.out.println(sdf.format(fromDate));
            System.out.println(sdf.format(toDate));

            if(fromDate.compareTo(toDate)>0){
                System.out.println("From Date should be less than To Date");
            } else if(fromDate.compareTo(toDate)==0){
                System.out.println("From Date is equal to To Date");
            } 

        }catch(ParseException ex){
            ex.printStackTrace();
        }
    }
}

Could some one help ?

回答1:

The easiest way is to use Jodatime and use

Days.daysBetween(start, end).getDays()

Another solution is to use Calendar, add 7 days and compare again.

  Calendar c=Calendar.getInstance();
  c.setTime(fromDate);
  c.add(Calendar.DATE,7);
  if(c.getTime().compareTo(toDate)<0){
    It's more than 7 days.
  }

回答2:

Using the java.time classes built into Java 8 and later:

LocalDate from = LocalDate.parse("2015-05-01");
LocalDate to = LocalDate.parse("2015-05-07");

long days = ChronoUnit.DAYS.between(from, to);    // 6 days
long weeks = ChronoUnit.WEEKS.between(from, to);  // 0 weeks

回答3:

You can try like this:

if(Days.daysBetween(fromDate,toDate ).getDays()>7)

Check JodaTime API

来源：https://stackoverflow.com/questions/30207693/how-to-check-if-date-exceeds-more-than-seven-days

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