类型 jakarta.persistence.EntityManagerFactory 不存在

Question

I am learning Spring Data and creating a project. Project like a list of exercises, save data in MySql thanks to Hibernate, but something wrong with it, and i don't know what

My controller:

@Controller
public class UserController {
    private final IUserService userService;

    @Autowired
    public UserController(IUserService userService) {
        this.userService = userService;
    }

    @PostMapping(path = "/user/create")
    public ResponseEntity<UserPojo> createUser(@RequestBody User user) {
        UserPojo result = userService.createUser(user);
        return new ResponseEntity<>(result, HttpStatus.OK);
    }

    @GetMapping(path = "/user/{id}")
    public ResponseEntity<UserPojo> getUser(@PathVariable Long id) {
        UserPojo result = userService.getUser(id);
        return new ResponseEntity<>(result, HttpStatus.OK);
    }
}

Service:

@Service
public class UserService implements IUserService {
    @PersistenceContext
    EntityManager entityManager;

    private final Converter converter;

    @Autowired
    public UserService(Converter converter) {
        this.converter = converter;
    }

    @Override
    @Transactional
    public UserPojo createUser(User user) {

        entityManager.persist(user);

        return converter.userToPojo(user);
    }

But when i ran it in Postman, i got this - I don't know why it appears:

More info:

java.lang.ClassNotFoundException: jakarta.persistence.EntityManagerFactory
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1449)
    org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1257)
    java.base/java.lang.Class.forName0(Native Method)
    java.base/java.lang.Class.forName(Class.java:488)
    java.base/java.lang.Class.forName(Class.java:467)
    java.base/sun.reflect.generics.factory.CoreReflectionFactory.makeNamedType(CoreReflectionFactory.java:114)

My POM and more code is here:
GitHub

Answer 1

You have a weird and inconsistent mix of dependencies here

    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-entitymanager</artifactId>
      <version>4.1.9.Final</version>
    </dependency>

    <dependency>
      <groupId>org.hibernate.javax.persistence</groupId>
      <artifactId>hibernate-jpa-2.0-api</artifactId>
      <version>1.0.1.Final</version>
    </dependency>

    <dependency>
      <groupId>org.springframework.data</groupId>
      <artifactId>spring-data-jpa</artifactId>
      <version>3.0.0</version>
    </dependency>

When you use Spring Data JPA version 3.0.0 you should use Hibernate 6+. To get started you shouldn't specify the versions for Hibernate since those are specified in the Spring Data JPA pom.xml .

And you shouldn't need hibernate-jpa-2.0-api at all.