Spring boot 2+ 无法自动装配。 'UserDetailsService'的bean不止一颗

Question

大家好，我是 spring 安全和 jwt 的新手。我在我的 spring 引导项目中实现 Jwt 以保护用户登录，我正在使用 spring 引导 2.1.5 而且我对 spring boot 2+ 中的新 bean 限制了解不多。我需要一些帮助..在这里我正在尝试@Autowired UserDetailsService 和代码运行很好..结果也很好..但是 intellij 在

处显示错误

@Autowired UserDetailsService jwtUserDetailsService

说...无法自动装配。有多个 UserDetailsService 类型的 bean。

任何人都可以向我解释这里发生了什么错误为什么我不能自动连接以及为什么以及 spring boot 2+ 中的自动连接限制是什么？

提前致谢

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class WebSecurity extends WebSecurityConfigurerAdapter {

    @Autowired
    private JwtAuthenticationEntryPoint jwtAuthenticationEntryPoint;

    @Autowired
    private PasswordEncoder passwordEncoder;

    @Autowired
    private JwtFilter jwtFilter;

    @Autowired
    private UserDetailsService jwtUserDetailsService; // here i got error only

    @Autowired
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(jwtUserDetailsService).passwordEncoder(passwordEncoder);
    }

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable();
        http.authorizeRequests().antMatchers("/api/user/add", "/generate").permitAll().anyRequest().authenticated().and()            .exceptionHandling().authenticationEntryPoint(jwtAuthenticationEntryPoint)
                .and().sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
        http.addFilterBefore(jwtFilter, UsernamePasswordAuthenticationFilter.class);
    }
}

我的 customUserDetailService 是

@Service
public class JwtUserDetailService implements UserDetailsService {

    @Autowired
    private UserRepository userRepository;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = userRepository.findByUsername(username);
        if (user != null) {
            return new org.springframework.security.core.userdetails.User(user.getUsername(), user.getPassword(), new ArrayList<>());
        } else {
            throw new UsernameNotFoundException("Username does't exists");
        }

    }
}

我的 JwtController class 公开 restend 点以生成 jwt 令牌


@CrossOrigin
@RestController
public class JwtController {

    @Autowired
    private JwtUtils jwtUtils;

    @Autowired
    private AuthenticationManager authenticationManager;
    @Autowired
    private JwtUserDetailService jwtUserDetailService;

    @PostMapping(value = "/generate")
    public ResponseEntity<?> generateToken(@RequestBody JwtRequest jwtRequest) throws Exception {
        try {
            authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(jwtRequest.getUsername(),
                    jwtRequest.getPassword()));
        } catch (DisabledException e) {
            throw new Exception("USER_DISABLED", e);
        } catch (BadCredentialsException e) {
            throw new Exception("INVAILD_CREDENTIALS", e);
        }
        final UserDetails userDetails = jwtUserDetailService.loadUserByUsername(jwtRequest.getUsername());
        final String token = jwtUtils.generateToken(userDetails);

        return ResponseEntity.ok(new JwtResponse(token));
    }
}

我的 JwtFilter Class

@Component
public class JwtFilter extends OncePerRequestFilter {

    @Autowired
    private JwtUserDetailService jwtUserDetailService;

    @Autowired
    private JwtUtils jwtUtils;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
            throws ServletException, IOException {

        final String requestTokenHeader = request.getHeader("Authorization");

        String username = null;
        String jwtToken = null;

        if (requestTokenHeader != null && requestTokenHeader.startsWith("Bearer ")) {
            jwtToken = requestTokenHeader.substring(7);
            try {
                username = jwtUtils.getUsernameFromToken(jwtToken);
            } catch (IllegalArgumentException e) {
                System.out.println("Unable to get JWT Token");
            } catch (ExpiredJwtException e) {
                System.out.println("JWT Token has expired");
            }
        } else {
            logger.warn("JWT Token does not begin with Bearer String");
        }

        if (username != null && SecurityContextHolder.getContext().getAuthentication() == null) {

            UserDetails userDetails = this.jwtUserDetailService.loadUserByUsername(username);

            if (jwtUtils.validate(jwtToken, userDetails)) {

                UsernamePasswordAuthenticationToken usernamePasswordAuthenticationToken = new UsernamePasswordAuthenticationToken(
                        userDetails, null, userDetails.getAuthorities());
                usernamePasswordAuthenticationToken
                        .setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
               SecurityContextHolder.getContext().setAuthentication(usernamePasswordAuthenticationToken);
            }
        }
        chain.doFilter(request, response);
    }

}

其他正常的东西，如实体、存储库和一些安全的 restend 点

Answer 1

UserDetailsService 由 spring 提供。要自动装配，您需要配置它。

@Bean
public UserDetailsService getUserDetails(){
   return new JwtUserDetailService(); // Implementation class
}

如果您对 Bean 配置不感兴趣。您可以直接自动装配 JwtUserDetailService。

@Autowired
private JwtUserDetailService jwtUserDetailsService;

Answer 2

我在另一个上下文中遇到了同样的错误。原因是 Idea 不知道要使用哪个 'UserDetailsService' 类型的 bean。我的解决方案是通过注释 Qualifier:

@Qualifier("beanNameWhichYouWantUse")
@Autowired
private UserDetailsService jwtUserDetailsService;

如果使用 Idea：将鼠标指向错误，select 从上下文菜单：

"More actions" -> "Add qualifier"

最后 select 豆子

Answer 3

您可以将此代码放入 application.properties:

spring.autoconfigure.exclude=org.springframework.boot.autoconfigure.security.servlet.UserDetailsServiceAutoConfiguration

Spring boot 2+ 无法自动装配。 'UserDetailsService'的bean不止一颗

Spring boot 2+ Could not Autowire. There is more than one bean of 'UserDetailsService'

spring-mvc

spring-security

jwt

spring-boot

userdetailsservice