Android Room:如何查询无外键列的相关实体

@Dao
public interface UserDao {
    @Query("SELECT * FROM User")
    List<User> getAllUsers();
}

public class UserRepository {
    private UserDao userDao;

    public UserRepository(UserDao userDao) {
        this.userDao = userDao;
    }

    public List<User> getAllUsers() {
        return userDao.getAllUsers();
    }
}

public class MainActivity extends AppCompatActivity {
    private UserRepository userRepository;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 初始化UserRepository对象
        userDao = Room.databaseBuilder(getApplicationContext(), AppDatabase.class, "database-name")
                .build()
                .getUserDao();

        // 获取所有用户
        List<User> users = userRepository.getAllUsers();

        // 处理查询结果
        // ...
    }
}