Question

我的应用： -

    @SpringBootApplication
    @ComponentScan("fi.ma.vegshopping")
    @EnableJpaRepositories("fi.ma.vegshopping")
    @EntityScan(basePackages = "fi.ma.vegshopping")
    public class VegShoppingApplication {

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

问题类： -

import fi.ma.vegshopping.dao.AccountDAO;
import fi.ma.vegshopping.entity.Account;

@Service
public class MyDBAuthenticationService implements UserDetailsService {

    @Autowired
    private AccountDAO accountDAO;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        Account account = accountDAO.findAccount(username); 
        System.out.println("Account= " + account);

        if (account == null) {
            throw new UsernameNotFoundException("User " //
                    + username + " was not found in the database");
        }

        // EMPLOYEE,MANAGER,..
        String role = account.getUserRole();

        List<GrantedAuthority> grantList = new ArrayList<GrantedAuthority>();

        // ROLE_EMPLOYEE, ROLE_MANAGER
        GrantedAuthority authority = new SimpleGrantedAuthority("ROLE_" + role);

        grantList.add(authority);

        boolean enabled = account.isActive();
        boolean accountNonExpired = true;
        boolean credentialsNonExpired = true;
        boolean accountNonLocked = true;

        UserDetails userDetails = (UserDetails) new User(account.getUserName(), //
                account.getPassword(), enabled, accountNonExpired, //
                credentialsNonExpired, accountNonLocked, grantList);

        return userDetails;
    }

}

AccountDAO类： -

    package fi.ma.vegshopping.dao;

    import fi.ma.vegshopping.entity.Account;

    public interface AccountDAO {
        public Account findAccount(String userName ); 
    }

AccountDAOImpl类： -

    package fi.ma.vegshopping.impl;

    import javax.transaction.Transactional;

    import org.hibernate.Criteria;
    import org.hibernate.Session;
    import org.hibernate.SessionFactory;
    import org.hibernate.criterion.Restrictions;
    import org.springframework.beans.factory.annotation.Autowired;

    import fi.ma.vegshopping.dao.AccountDAO;
    import fi.ma.vegshopping.entity.Account;


    @Transactional
    public class AccountDAOImpl implements AccountDAO {

        @Autowired
        private SessionFactory sessionFactory;

        @Override
        public Account findAccount(String userName ) {
            Session session = sessionFactory.getCurrentSession();
            Criteria crit = session.createCriteria(Account.class);
            crit.add(Restrictions.eq("userName", userName));
            return (Account) crit.uniqueResult();
        }
    }

错误： -

申请失败

说明

fi.ma.vegshopping.authentication.MyDBAuthenticationService中的字段accountDAO需要一个类型为＆＃39; fi.ma.vegshopping.dao.AccountDAO＆＃39;的bean。无法找到。

动作：

考虑定义类型为＆＃39; fi.ma.vegshopping.dao.AccountDAO＆＃39;的bean。在你的配置中。

Answer 1

问题可能出在包结构上，您需要将@Component标记为AccountDAOImpl类（位于 fi.ma.vegshopping.impl 包下），如下所示这样容器就可以扫描并且找到你的注射豆。

@Component //or @Repository
public class AccountDAOImpl implements AccountDAO {
  //add your code here
}

Spring boot APPLICATION FAILED TO START因为未找到Autowired bean

1 个答案: