Java 초보자가 연습하기에 적합한 프레임워크는 무엇입니까?

@SpringBootApplication
public class RestApiApplication {
    public static void main(String[] args) {
        SpringApplication.run(RestApiApplication.class, args);
    }
}

@RestController
@RequestMapping("/api/v1")
public class UserController {

    private final UserService userService;

    public UserController(UserService userService) {
        this.userService = userService;
    }

    @GetMapping("/users")
    public List<User> getAllUsers() {
        return userService.findAll();
    }

    @PostMapping("/users")
    public User createUser(@RequestBody User user) {
        return userService.create(user);
    }
}

Session session = sessionFactory.openSession();
Transaction transaction = session.beginTransaction();

User user = new User();
user.setName("John Doe");
session.save(user);

transaction.commit();

@ExtendWith(SpringExtension.class)
@DataJpaTest
class UserControllerTest {

    @Autowired
    private UserService userService;

    @Test
    void createUser() {
        User user = new User();
        user.setName("John Doe");

        User createdUser = userService.create(user);

        assertThat(createdUser).isNotNull();
        assertThat(createdUser.getName()).isEqualTo("John Doe");
    }
}

@ExtendWith(SpringExtension.class)
@DataJpaTest
class UserControllerTest {

    @Autowired
    private UserService userService;

    @Mock
    private UserService mockUserService;

    @InjectMocks
    private UserController controller;

    @Test
    void createUser() {
        User user = new User();
        user.setName("John Doe");

        when(mockUserService.create(user)).thenReturn(user);

        User createdUser = controller.createUser(user);

        assertThat(createdUser).isNotNull();
        assertThat(createdUser.getName()).isEqualTo("John Doe");
        verify(mockUserService).create(user);
    }
}