如何检查日期是否超过七天

Question

我想检查两个日期是否超过一周,例如,检查两个日期是否有七天,

此时数据范围应仅在一周内(7天).

我试过这样的事,

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();
        }
    }
}

有人可以帮忙吗？

Answer 1

使用Java 8及更高版本中内置的java.time类:

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

Answer 2

最简单的方法是使用Jodatime并使用

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

另一种解决方案是使用日历,添加7天并再次进行比较.

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

Answer 3

你可以尝试这样:

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

检查JodaTime API