问题
Hibernate 5 and above supports Java8 DateTime Api through jar "hibernate-java8".
But the MavenRepository shows a message Deprecated - use hibernate-core instead) alongside the title of the hibernate-java8 jar.
Why is the hibernate-java8 jar called deprecated even though it is required to gain the hibernate support for java8?
回答1:
You can see the Migration Guide for Hibernate. It specifies that
Hibernate 5.2 is built using Java 8 JDK and will require Java 8 JRE at runtime (we are investigating whether Java 9 will also work). This has a number of implications:
The hibernate-java8 module has been merged into hibernate-core and the Java 8 date/time types are now natively supported.
(todo) support for Java 8 Optional
(todo) support for other Java 8 features?
The hibernate-java8 module has been removed; that functionality has been consolidated into hibernate-core.
For hibernate-java8 see this ticket for explanation,
As this relies on Java 8 and Hibernate still maintains compatibility back to Java 6, a new module hibernate-java8 was added to isolate the Java 8 compatibility to just these classes. We will fold the classes from this module into hibernate-core once we baseline one Java 8.
Since hibernate no longer maintains the hibernate-java8 and you can see that hibernate-java8 is nothing more than an empty placeholder. Github & JIRA Detail.
So, As the functionality has been merged into hibernate-core; hibernate-java8 now is depreciated.
I hope this answer your queries.
来源：https://stackoverflow.com/questions/39761619/why-is-hibernate-java8-hibernate-5-x-jar-shown-deprecated