Deferred and forward processing of time classes (util date) in Java

When the number of days lag or forward is within a certain amount of time, the following methods can be used to process

public static date Getvalidendtime (date Date,int validdaycount) {

SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd");

String datestr = Sdf.format (date);

try {

Date = Sdf.parse (DATESTR);

} catch (ParseException e) {

TODO auto-generated Catch block

E.printstacktrace ();

}

Date.settime (Date.gettime () + (Validdaycount * 24 * 60 * 60 * 1000));

return date;

}

method to change the time to a specified number of days (Validdaycount)

The passage time in this example is in the form of an integer day, which is the "yyyy-mm-dd" of the SDF above.

After my test when using the above method to change the time caused by the month changes will be error, so when the number of days to change enough, you can use the following methods to go through the time.

public static date Getvalidendtime (date Date,int validdaycount) {

SimpleDateFormat SDF = new SimpleDateFormat ("Yyyy-mm-dd");

String datestr = Sdf.format (date);

try {

Date = Sdf.parse (DATESTR);

} catch (ParseException e) {

TODO auto-generated Catch block

E.printstacktrace ();

}

Calendar calendar = Calendar.getinstance ();

Calendar.settime (date);

Calendar.add (Calendar.date, Validdaycount);

Date = Calendar.gettime ();

return date;

}

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Deferred and forward processing of time classes (util date) in Java