spring 引导找不到类型的 bean

Question

我正在尝试制作简单的门户网站，但是当我尝试通过

构建代码时

mvn clean install -X

我收到错误代码

Description: Field userRepository in com.kapjee.dziennik.service.UserDetailsServiceImpl required a bean of type 'com.kapjee.dziennik.service.UserRepository' that could not be found. Action: Consider defining a bean of type 'com.kapjee.dziennik.service.UserRepository' in your configuration.

下面给大家一个工程树。

Tree of project

UserDetailsServiceImpl

@Service
public class UserDetailsServiceImpl implements UserDetailsService {

@Autowired
private UserRepository userRepository;

@Override
@Transactional(readOnly = true)
public UserDetails loadUserByUsername(String username) throws 
UsernameNotFoundException {

 User user = userRepository.findByUsername(username);
   if (user != null) {
      Set<GrantedAuthority> grantedAuthorities = new HashSet<>();
      grantedAuthorities.add(new 
      SimpleGrantedAuthority(user.getRole().toString()));
      return new 
      org.springframework.security.core.userdetails.User(user.getUsername(),
      user.getPassword(), grantedAuthorities);
  } else {
    throw new UsernameNotFoundException("User was not found!");
  }

 }

}

这是 UerService

@Service
public interface UserService {

  void save(User user);

  User findByUsername(String username);
}

和 UserRepository

public interface UserRepository extends  JpaRepository<User, Long> {
  User findByUsername(String username);
}

在 Main class 我分享所有包

@SpringBootApplication
@ComponentScan({"com.kapjee.dziennik"})
@EntityScan("com.kapjee.dziennik.model")
@EnableJpaRepositories("com.kapjee.dziennik.model")

Answer 1

很可能，EnableJpaRepositories 导入了错误的包。我猜 UserRepository 不在 model 包中。使用类型安全属性 basePackageClasses 而不是 basePackages。 @ComponentScan 和 EntityScan 在您的情况下是多余的。很抱歉，您似乎在没有真正了解自己在做什么的情况下，用创可贴和胶水拼凑了一些代码。

Answer 2

@EnableJpaRepositories("com.kapjee.dziennik.model")

我看到您在模型包中指定了 jpa 存储库，您还需要包含包含存储库的包，所以如果您的存储库在包 com.kapjee.dziennik.repository 下，只需返回一个级别

 @EnableJpaRepositories("com.kapjee.dziennik")

spring 引导找不到类型的 bean

spring boot could not find bean of type

java

spring

javabeans

spring-boot