Hi I am trying to retrieve and Save Date from Oracle Table using JPA . The column type is DATE in Oracle.
In JPA entity i configured as
#Column(name = "NOTE_DATE")
private Date noteDate;
In Json why i am getting the date with a T character . Eventhough its not saving that (T)character ins DB why its asking for date as
Successful Save
"noteDate": "2021-11-01T20:00:05"
Failure Save
"noteDate": "2021-11-01 20:00:05"
The 2021-11-01T20:00:05 date representation is generated by your JSON serializer which converts your Date to String and not by JPA. By default, Spring uses Jackson as JSON serializer which converts Date to its ISO 8601 representation.
For your error when you try to save your object using
"noteDate": "2021-11-01 20:00:05"
For me, it is a deserialization problem: Jackson can not convert your JSON to your Java object.
Related
I am using urql-react as my React client in a project. I need to make sure that any date variables in query/mutation with Date scalar type are serialized into YYYY-DD-MM format while for DateTime scalar type, the date object is serialized in YYYY-DD-MMTHH:mm:ssZ format.
How can this be achieved on a central level?
I have spring boot rest service which call another service xyz and receive date in format yyyy-MM-ddXXX from json. But time Zone of of date is getting changed in my service response. Suppose I am getting date in JSON from service xyz as "date": "2018-08-27-07:00" but my service response is returning date : "2018-08-27-04:00". Offset getting changed. Date field in my POJO is . I want to use the same offset I am getting from backend service and it can be any offset.
#JsonFormat(shape=JsonFormat.Shape.STRING, pattern="yyyy-MM-ddXXX")
private Calendar date;
The problem is that Calendar (and Date) use implicit time conversions to adjust it to your time zone. And almost always it is something that not expected.
To avoid this use java.time classes (such as OffsetDateTime or ZonedDateTime, or even LocalDateTime if you do not need to work wit time zones).
And small offtopic advice: try to use time format aligned to ISO8601 standard (like 2018-08-24T22:30:00)
I wanna persistant an object with LocalDateTime fields with spring data and a couchbase behind in a spring boot app.
Here are the fieldmapping:
#Field
private LocalDateTime start;
#Field
private LocalDateTime end;
When I save the object then the dates are stored as numbers in couchbase.
Here are the stored data in couchbase:
"start": 1518818215508,
So the problem is, if I store an LocalDateTime e.g at 10.00, and then read it from db the result is 09:00 instead of 10:00 because of my local time +1:00.
In Postgres I would save the date in an column with mapping: columnDefinition= "TIMESTAMP WITH TIME ZONE"
How I can solve this problem in couchbase?
JSON (famously) has no date format (unlike relational databases which have a sprawling number of different formats). If you want to store timezone data in JSON, here are two options I can think of:
Using a string instead of a number, and then using something like ISO-8601.
Store the epoch time as you currently are as a UTC value, but also store a separate number field that represents a timezone offset from UTC
I would recommend going with the first approach.
I'm no Spring/Java expert, but a quick look at the documentation says you can do this by setting system property org.springframework.data.couchbase.useISOStringConverterForDate to true
HI I have a problem in my current Spring +JPA project. My entity object and bean object for web page are same.
From web page using jquery i am reading date in (dd-mon-yyyy) format from screen and saving it to database. The field is of Date type in my bean class.
During update i am fetching values from database and displaying the same in web page. But this time the date format has chnaged to different fromat(yyyy/mm/dd) on screen.
So while saving again i am getting error, as the date format has been changed and i am unable to parse the value received form screen.
So is there any proper way to handle this situation.
I assume that you are storing the dates in database as a DATE or DATETIME type. If so, the value should be a Date object in Java. In order to output the date value as dd-mon-yyyy, you will need to use SimpleDateFormat to convert the date object into a string representation in your desired format:
new SimpleDateFormat("dd-MMM-yyyy").format(date);
An additional note: for an internal-only API, it doesn't matter what format you choose as long as you are consistent everywhere. But if you are creating something that could one day be exposed publicly, I would suggest that you send/receive date and time value in the ISO8601 format: yyyy-MM-ddTHH:mm:ssZ. This format is understood by everyone everywhere.
Update:
Based on your comment, I would say add a new method to your bean class:
private DateFormat dateformat = new SimpleDateFormat("dd-MMM-yyyy");
public String getFromDateString() {
return dateformat.format(fromDate);
}
And then in your JSP, call ${bean.fromDateString}.
I am creating a java plugin for moving data from cassandra database to elastic search. I am getting all the data but the date which I am getting from the database is in human readable form ie Row[Fri Jul 25 11:36:10 IST 2014].I want this to be converted to epoch timestamp format like 1414386721.
I do not know Cassandra DB, but according to this doc your driver should be translating the date-time value in Cassandra to a java.util.Date object in Java.
You may be confused about how a java.util.Date object works. The j.u.Date class is confusing and difficult in many ways, one of which is that while a Date has no time zone its toString implementation on-the-fly applies the JVM’s current default time zone as it generates the string.
You may also be new to date-time work and therefore confusing a date-time object with its String representation. Consider that 1.4 is a number and should not be confused with its representation as a String in the format of a price €1.40. Likewise a date-time object is not a String but can be represented as a String generated any number of formats.
Lastly, if you are indeed getting a java.util.Date object, learn to convert that to either the Joda-Time library or the java.time library. The java.util.Date and .Calendar classes are notoriously troublesome.