Mail notification thru Log4j

1. Add mail.jar and activation.jar to lib.
2. Add SMTPappender in Log4j.xml

Add element for mail in element.

Date Utilities

Some methods for date calcuations..

public class DateUtils {

public static final String DATE_FORMAT = "dd/MM/yyyy";

/** * This method gives difference(number of days) in two dates.
* @param newDate
* @param oldDate
* @return
* @throws Exception
*/
public static int dateDiff (String newDate, String oldDate) throws Exception{

int noOfDays = 0;
int MILLIS_IN_DAY = 1000 * 60 * 60 * 24;
Date date1 = new SimpleDateFormat(DATE_FORMAT).parse(newDate);
Date date2 = new SimpleDateFormat(DATE_FORMAT).parse(oldDate);
long diff = date1.getTime() - date2.getTime();
if (diff > 0) {
noOfDays = (int)(diff/MILLIS_IN_DAY);
}
return noOfDays;
}


/**
* This method subtracts given number of days from specified date
* and returns resultant date as a string.
* @param newDate
* @param days
* @return
* @throws Exception
*/

public static String subtractDaysFromDate (String newDate,int days) throws Exception
{
Date date1 = new SimpleDateFormat(DATE_FORMAT).parse(newDate);
int MILLIS_IN_DAY = 1000 * 60 * 60 * 24;
long diff = date1.getTime() - MILLIS_IN_DAY;
Date tempDate1 = new Date(diff);
SimpleDateFormat format = new SimpleDateFormat(DATE_FORMAT);
String returnString = format.format(tempDate1);
return returnString;
}
/**
* This method adds given number of days to specified date and returns result date.
* @param strDate
* @param days
* @return
* @throws Exception
*/
public static String addDaysToDate (String strDate , int days) throws Exception{
String strDateNew = "";
Date tempDate = new SimpleDateFormat
(DATE_FORMAT).parse(strDate);
SimpleDateFormat format = new SimpleDateFormat(DATE_FORMAT);
Calendar cal = Calendar.getInstance();
cal.setTime(tempDate);
cal.add(Calendar.DATE,days);
Date tempDate1 = new Date(cal.getTimeInMillis());
strDateNew = format.format(tempDate1);
return strDateNew;
}