在Spring Boot中注入自动关联的问题

Question

我在下面的代码中收到@Autowired AccountRepository的NoSuchBeanDefinitionException并出现错误消息： No qualifying bean of type [com.brahalla.PhotoAlbum.dao.AccountRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. 。 我已将包含存储库的软件包添加到@ComponentScan，但是由于某种原因它仍然没有看到它。 依赖注入在我项目的其他任何地方都有效，只是在这个特定文件中没有。

package com.brahalla.PhotoAlbum.configuration;

import com.brahalla.PhotoAlbum.dao.AccountRepository;
import com.brahalla.PhotoAlbum.domain.entity.Account;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.authentication.configurers.GlobalAuthenticationConfigurerAdapter;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

@Configuration
@ComponentScan("com.brahalla.PhotoAlbum.dao")
public class GlobalAuthenticationConfiguration extends GlobalAuthenticationConfigurerAdapter {

  @Autowired
  AccountRepository accountRepository;

  @Override
  public void init(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception {
    authenticationManagerBuilder.userDetailsService(userDetailsService());
  }

  @Bean
  UserDetailsService userDetailsService() {
    return new UserDetailsService() {

      @Override
      public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        Account account = accountRepository.findByUsername(username);
        if(account != null) {
          return new User(
            account.getUsername(),
            account.getPassword(),
            true, true, true, true,
            AuthorityUtils.createAuthorityList("USER")
          );
        } else {
          throw new UsernameNotFoundException("could not find the user '" + username + "'");
        }
      }

    };
  }

}

这是存储库：

package com.brahalla.PhotoAlbum.dao;

import com.brahalla.PhotoAlbum.domain.entity.Account;

import org.springframework.data.repository.CrudRepository;

public interface AccountRepository extends CrudRepository<Account, Long> {

  public Account findByUsername(String username);

}

和主要的应用程序配置：

package com.brahalla.PhotoAlbum.configuration;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ApplicationConfiguration {

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

}

这是完整的日志和堆栈跟踪： http : //pastebin.com/PKvd8rXV

编辑 这是git存储库 ，有问题的代码在分支develop 。

Answer 1

带有@ controller，@ service，@ component，@ Repository等批注的类将是自动布线的候选类，而其他类则不是。因此请考虑相应地对您的类进行批注，以进行正确的自动布线。

@ Component->任何Spring管理的组件的通用构造型

@Repository- >持久层的构造型

@Service- >服务层的构造型

@Controller- >表示层的构造型（spring-mvc）

下面的代码应该工作

 @Repository
 public interface AccountRepository extends CrudRepository<Account, Long> {

  public Account findByUsername(String username);
}

Answer 2

我找到了解决问题的方法，我只是想确保将其发布在这里。

首先，我将所有Web配置选项移到了一个扩展WebSecurityConfigurerAdapter的类中。 其次，我必须将AuthenticationManagerBuilder初始化的注释更改为@Autowired而不是@Override。 第三，我必须将UserDetailsS​​ervice bean公开：

package com.brahalla.PhotoAlbum.configuration;

import com.brahalla.PhotoAlbum.dao.AccountRepository;
import com.brahalla.PhotoAlbum.domain.entity.Account;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

@Configuration
@EnableWebSecurity
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {

  @Autowired
  AccountRepository accountRepository;

  @Autowired
  public void configureAuthentication(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception {
    authenticationManagerBuilder
      .userDetailsService(userDetailsService());
  }

  @Override
  protected void configure(HttpSecurity httpSecurity) throws Exception {
    httpSecurity
      .authorizeRequests()
        .anyRequest().fullyAuthenticated()
      //.and().authorizeUrls()
      /*.and().formLogin()
        .loginPage("/login")
        .permitAll()
      .and().logout()
        .permitAll()*/
      .and().httpBasic()
      .and().csrf()
        .disable();
  }

  @Bean
  public UserDetailsService userDetailsService() {
    return new UserDetailsService() {

      @Override
      public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        Account account = accountRepository.findByUsername(username);
        if(account != null) {
          return new User(
            account.getUsername(),
            account.getPassword(),
            true, true, true, true,
            AuthorityUtils.createAuthorityList("USER")
          );
        } else {
          throw new UsernameNotFoundException("could not find the user '" + username + "'");
        }
      }

    };
  }

}

Answer 3

我认为您在ApplicationConfiguration类中缺少@EnableJpaRepositories 。

Answer 4

您可以发布应用程序的调试日志吗？ 它将给出是否创建该bean的想法。 尝试将componentscan放置在applicationconfiguration类中，并使用@component或相关注释标记GlobalAuthenticationConfiguration

Answer 5

您可以尝试以下代码段：

package com.brahalla.PhotoAlbum.dao;

import com.brahalla.PhotoAlbum.domain.entity.Account;
import org.springframework.stereotype.Repository;
import org.springframework.data.repository.CrudRepository;

@Repository
public interface AccountRepository extends CrudRepository<Account, Long> {

  public Account findByUsername(String username);

}

另外，用@EnableJpaRepositories注释您的ApplicationConfiguration

Answer 6

1）您能否尝试将您的类ApplicationConfiguration类放在根包com.brahalla.PhotoAlbum而不是com.brahalla.PhotoAlbum.configuration ？

实际上， @SpringBootApplication扫描它所在位置的子包。

请参见参考指南14.2查找主应用程序类

2）由于对方说，把@EnableJpaRepositories在你的类GlobalAuthenticationConfiguration

使用这两种配置，它应该可以工作

Answer 7

我遇到了同样的问题，这个问题正是由于Spring Boot ApplicationConfiguration.java是在特定包中而不是在根目录中创建的。 我将其移至根目录。

即最初是在com.myproject.root.config中，我将其移至com.myproject.root