Question

我正在Web应用程序中使用以下功能比较两个日期相等或之前或之后的日期。

public class DateComareClass{

    public static void main(String args[]) throws ParseException, IOException {

        DateTimeComparator dateTimeComparator=DateTimeComparator.getDateOnlyInstance();
        Calendar cal = Calendar.getInstance();
        DateFormat dftreg = new SimpleDateFormat("yyyy-MM-dd");
        Date currentDate = new Date(cal.getTime().getTime());
        Date SignUpDateCheck = (Date) dftreg.parse("2018-07-05");
        System.out.println(SignUpDateCheck + " is the SignUpDateCheck ");
        System.out.println(currentDate + " is the currentDate ");
        int retval=dateTimeComparator.compare(currentDate,SignUpDateCheck);
        System.out.println(retval);
        SignUpDateCheck = (Date) dftreg.parse("2018-07-13");

        System.out.println(SignUpDateCheck + " is the SignUpDateCheck ");
        System.out.println(currentDate + " is the currentDate ");
        retval=dateTimeComparator.compare(currentDate,SignUpDateCheck);
        System.out.println(retval);


    }
}

它打印

Thu Jul 05 00:00:00 2018 is the SignUpDateCheck  
Thu Jul 12 12:03:39 2018 is the currentDate
1
Fri Jul 13 00:00:00 2018 is the SignUpDateCheck  
Thu Jul 12 12:03:39 2018 is the currentDate 
-1

但是，如果我在我的web应用程序中使用相同的逻辑，则似乎将retval始终打印为-1，无论它是在日期之后，之前还是等于日期。

我在webapp中的代码段

String GenerateSignupDate=year+"-"+month+"-"+day;
SignUpDateCheck= (Date) dftreg.parse(GenerateSignupDate);
System.out.println(SignUpDateCheck + " is the SignUpDateCheck ");
System.out.println(currentDateReg + " is the currentDateReg ");
//System.out.println(SignUpDateCheck.before(currentDateReg) + " is the answer ");
retval=dateTimeComparator.compare(currentDate,SignUpDateCheck);
System.out.println(retval + " is the retval ");

但是注册时，当前日期可以正确打印。只会错误地打印retval。

感谢您的帮助。

解析日期导致webapp错误

0 个答案: