没有可用类型的合格 bean：预计至少有 1 个 bean 有资格作为自动装配候选者

Question

Unable to start server, After updating Spring boot3.

org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.sample.fa.repository.NewsRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

Description:
Field newsRepository in com.sample.fa.service.NewsService required a bean of type 'com.sample.fa.repository.NewsRepository' that could not be found.

The injection point has the following annotations:
        - @org.springframework.beans.factory.annotation.Autowired(required=true)

// code

@Repository
public interface NewsRepository extends JpaRepository<News, Long> {

    Optional<News> findById(Long id);

}

Answer 1

I have the same issue:

Field repository in com.lst.lexiconlookup.service.LexiconService required a bean of type 'com.lst.lexiconlookup.repository.LexiconRepository' that could not be found.

The injection point has the following annotations: - @org.springframework.beans.factory.annotation.Autowired(required=true)

Action:

Consider defining a bean of type 'com.lst.lexiconlookup.repository.LexiconRepository' in your configuration.

I am using version 3.0.1 from SpringInitialzer. When I take out @Autowired from service class, I can run but get a Null Pointer:

There was an unexpected error (type=Internal Server Error, status=500). Cannot invoke "com.lst.lexiconlookup.repository.LexiconRepository.findAll()" because "this.repository" is null java.lang.NullPointerException: Cannot invoke "com.lst.lexiconlookup.repository.LexiconRepository.findAll()" because "this.repository" is null

@Repository
public interface LexiconRepository extends JpaRepository<Lexicon, Long>
{

}


@Service
public class LexiconService 
{
    @Autowired
    private LexiconRepository repository;


    public List<Lexicon> getAllLexicon()
    {
        return repository.findAll();
    }

}


@RestController
public class LexiconController 
{
    @Autowired
    private LexiconService lexiconService;

    @GetMapping("/hello")
    @ResponseBody
    public String hello()
    {
        return "HELLO";

    }

    @GetMapping("/lexiconlookup")
    @ResponseBody
    public List<Lexicon> retrieveAllLexicon()
    {
        return lexiconService.getAllLexicon();
    }

}