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I have an ntp server that returns the time zone of my country. During the development of a java service and deployment on a Tomcat server, when processing a data type sea of time or date whose origin is an input parameter or by querying the database. I can't process the date correctly.
To solve this problem temporarily, I have had to set the time zone by code both for the registration to the database and the query to it or during the processing of a request. I was hoping that the ntp service configured on my server would solve this problem. The local I have no problem to process the data type date or timestamp.
When I get the timestamp value from the database, I use the "parsearATimeStampLoca" function to correctly process the value from the database if it doesn't return the value 5 hours early. This happens to me when running a jar or consuming with a client the rest service published on the server.
if (rs.next()) {
respuesta = new EntidadStorageOvh();
respuesta.setExpired_at(AyudaTimeStamp.parsearATimeStampLocal(
rs.getTimestamp(3))
);
Function parsearATimeStampLocal
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
sdf.setTimeZone(TimeZone.getTimeZone("America/Bogota"));
String fechaGeneracion = sdf.format(ts);
tsAux = Timestamp.valueOf(fechaGeneracion);
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is there a way to make the user add just one item per day, then get an alert saying "only one time a day"
what to use, coroutine, tasktimer, work manger ?
I will try and give a general answer.
Usually when it comes to such requirements it is good to compare the date and time of the last item that was created and the current date and time. That means you would need to store the item in a database.
The reason I'm suggesting such an approach is because a user might close your app, or the OS might put it to sleep / terminate it and all of your tasks and timers might be stopped. By having it persisted in a DB, you can always be sure your requirements are met.
For example if the requirement is 24 hours or perhaps just a calendar day (after midnight), then you would do the comparison and know if they have been met and allow the creation of new items, or not.
Additionally, it's always good to try and experiment at first. See what works and what doesn't before asking your question.
Good luck.
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I was asked to add a validation to the "date field". Only the present or a future date is allowed.Otherwise it shows an error message.
You can do this with javascript. If you want to do this in frontend.Below is the answer
To make any past dates unselectable, you first have to find the instantiation of the datepicker, and set the minDate setting to zero.
$('element').datepicker({
minDate : 0
});
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I am working on printing a file with scheduled date (selected a date from datepicker) in Java, but I don't have any idea about how to do it.
Use cron based tasks that will fire and do the work. For your case, you may use Quartz
It's depend on what actualy you do.
If you want to print many files in different time (printer queque in some oraginsation for example) you could follow next recomendation:
1) place all records about planned print in some storage (file, DB)
2) create one scheduler( #Scheduled in spring for example, or java sheduled executor) wich will processed queqe every minute(if minute is minmal interval of date that you could select).
(Be careful and select delay option instead of rate in your scheduler)
3) print only whose files that time to proceed.
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I want to know the name of continent/country provided timezone id?
For e.g.
System.out.println(TimeZone.getTimeZone("PDT"));
I wanted answer as north america/america.
System.out.println(TimeZone.getTimeZone("GMT+05:30"));
I wanted answer as asia/india.
i am not getting the desired output.
The reason of asking question :: I am storing in my database on server the timezone(PDT,GMT+05:30) as given by the mobile
device.Now i need to perform analytics , that my app was accessed from which continent/country.
Help is appreciated...
No. Timezones cut vertically over the globe and there are many countries which share the same timezone.
For example, India is southwest of China, so the answer "China" would be equally correct for some timezones.
See this web site for a map of timezones and which countries they apply to: http://www.timeanddate.com/time/map/
If you want to work it out backwards, this might be of some help...
Some of the TimeZones include a bit of the info you are looking for, for example, try:
for (String s : TimeZone.getAvailableIDs()) {
System.out.println(s);
}
Output is as follows..
...
Europe/Amsterdam
Europe/Andorra
Europe/Belgrade
Europe/Berlin
Europe/Bratislava
Europe/Brussels
Europe/Budapest
Europe/Copenhagen
Europe/Gibraltar
Europe/Ljubljana
Europe/Luxembourg
Europe/Madrid
Europe/Malta
Europe/Monaco
Europe/Oslo
Europe/Paris
...
This you could use to grab the TimeZones and check the info they have, you might be able to get what you want, albeit with a lot of work.
System.out.println(TimeZone.getTimeZone("Europe/Amsterdam"));
System.out.println(TimeZone.getTimeZone("UTC"));
Outputs
sun.util.calendar.ZoneInfo[id="Europe/Amsterdam",offset=3600000,dstSavings=3600000,useDaylight=true,transitions=180,lastRule=java.util.SimpleTimeZone[id=Europe/Amsterdam,offset=3600000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWeek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=3600000,endTimeMode=2]]
sun.util.calendar.ZoneInfo[id="UTC",offset=0,dstSavings=0,useDaylight=false,transitions=0,lastRule=null]
Using the offset, you can work out the relation to UTC time. Even in a simple case where you don't consider daylight savings etc, this is very complex, tricky and time consuming. Possible, I'd say.