JPA 2.0 API maven artifact

I am currently using the Hibernate JPA 2.0 artifact, but I'd like to use something more standard

There is still no javax.persistence:persistence-api:jar:2.0 artifact from Sun/Oracle. Either use the full javax:javaee-api:jar:6.0 artifact if you want something from Sun/Oracle... or just stick with the interfaces provided by Hibernate, EclipseLink, OpenJPA, etc.

Currently (Q1 2020) the default artifact is

<dependency>
  <groupId>jakarta.persistence</groupId>
  <artifactId>jakarta.persistence-api</artifactId>
  <version>2.2.3</version>
</dependency>

An older artifact of javax.persistence-api is also available at maven central, but is superseded by the jakarta version.

<dependency>
  <groupId>javax.persistence</groupId>
  <artifactId>javax.persistence-api</artifactId>
  <version>2.2</version>
</dependency>

The code is maintained in this github repo.

As Ivan explains, there are no official Sunacle jars in Maven. However, it is quite often the case that an implementer of a given API will publish an artifact for that API (the API itself, rather than their implementation of it.

In the case of JPA 2.0, Hibernate publish org.hibernate.javax.persistence:hibernate-jpa-2.0-api, which contains just the javax.persistence classes, and no Hibernate-specific stuff.

My build.gradle therefore says:

dependencies {
    compile group: 'org.hibernate.javax.persistence', name: 'hibernate-jpa-2.0-api', version: '1.0.1.Final'
    runtime group: 'org.hibernate', name: 'hibernate-entitymanager', version: '4.1.4.Final'
}

Which puts Hibernate's release of the API on the compile classpath, and their implementation on the runtime classpath.