Timezone issue in Spring Boot JPA application - mysql

Question

I am facing date time issue in my spring boot jpa application.
For example, In my database I have one column created_on which contains 2019-07-11 09:30:00 date.
When I fetch this record threw JPA it converts to UTC.
Means date 2019-07-11 09:30:00 converts to 2019-07-11 05:00:00.
My System time is in IST and date is saved in database in IST as well.
I am using mysql database.
In my Enitity
private Date createdOn;
Database column:
created_on timestamp
Service:
#Service
#Transactional(readOnly = true)
public class EntityTypeService {
#Autowired
private IEntityTypeRepository entityTypeRepository;
public EntityType findById(Long id) {
EntityType entityType = entityTypeRepository.findById(id).orElse(new EntityType());
System.out.println(entityType.getCreatedOn());
return entityType;
}
}
Repository
#Repository
public interface IEntityTypeRepository extends CrudRepository<EntityType, Long> {
}
Date in database is 2019-07-11 09:30:00
But when I print it on service System.out.println(entityType.getCreatedOn()); it gives me 2019-07-11 05:00:00.
This is generic issue in my whole application.

Answer 1

After so much research I found the solution.
Actually issue was because of
spring.jpa.properties.hibernate.jdbc.time_zone=UTC
this property which I have set in my appication.properties.
When I removed this property everything works fine at the backend. Backend showing the perfect time which is available in database.
But now when response comes to frontend, at that time my date gets converted to UTC.
Like backend it's showing 2020-06-03 18:56:14.0 and when it comes to front end it converts to 2020-06-02T13:26:14.000+0000.
Which is also an issue for me.
So after some more research I found that Jackson by default converts all date to UTC when object send to frontend.
The solution to this problem is
spring.jackson.time-zone=IST
My Database and System timezone is IST so I have set IST to jackson timezone too which solves the problem.
Hope this answer may help someone.

Answer 2

You can set timezone for in database connection using serverTimezone eg:Asia/Kolkata and use useLegacyDatetimeCode=false
spring.datasource.url= = jdbc:mysql://127.0.0.1/db_name?useLegacyDatetimeCode=false&serverTimezone=Asia/Kolkata
And don't use legacy class Date rather use modern class LocalDateTime

Answer 3

When working on JPA + Spring Boot for a backend application, make sure to use same TimeZone through out server configuration. For example, to use UTC do as below:
On server OS level: sudo timedatectl set-timezone UTC (for example on Cent OS)
On MySQL / Database server in my.cnf file (optional)
Spring config: spring.jpa.properties.hibernate.jdbc.time_zone=UTC
MySQL URL query parameters spring.datasource.url=jdbc\:mysql\://localhost\:3306/my_db_name?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC&useLegacyDatetimeCode=false
And if you are using Jackson JSON framework you can automatically parse DateTime value to String format using #JsonFormat(shape= JsonFormat.Shape.STRING, pattern="dd MMM yyyy HH:mm:ss") on the entity property / field.
Application entry point #SpringBootApplication
#PostConstruct public void init(){ TimeZone.setDefault(TimeZone.getTimeZone("UTC")); }
This should cover most of the implementation challenges while work on Dates and Timestamps. Hope that it helps.

Answer 4

Try to avoid using Date for timestamps in time zones because it is not designed to handle these in a good way.
You could try to print the date object with a formatter or use LocalDateTime (or ZonedDateTime if time zones are important to you) instead.

Answer 5

You may try putting #DateTimeFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSX") on createdOn setter.