Question

while (rs.next()) {
    String rn = rs.getString(3);
    String sqldate = rs.getString(2); // database reservation date
    if (rn.equals(rnumber)) {
        Calendar cal = Calendar.getInstance();
        String rdate = (Integer.toString(cal.get(Calendar.YEAR)) + "-" + Integer.toString(cal.get(Calendar.MONTH)) + "-" + Integer.toString(cal.get(Calendar.DATE)));
    } else {
        response.sendRedirect("status.jsp?Status=Reservation number not exist");
    }
}

I need to add 7 days to SQL date ( 2012-10-05 +7 ) and need to check those days are in between SQL date and current date.

Answer 1

You need to parse your date string to create a java.sql.Date object: –

String sqldate = rs.getString(2);
DateFormat DOB = new SimpleDateFormat("yyyy-MM-dd");
java.sql.Date convertedDate = new java.sql.Date(DOB.parse(sqldate).getTime());

Then use Calendar.setTime() method to set Date to Calendar instance: –

Calendar cal = Calendar.getInstance();
cal.setTime(convertedDate);
cal.add(Calendar.DATE, 7);