不能奥托瓦尔。找不到'MyUserDetailsService'类型的bean

Question

IDEA编译器报告错误，但项目可以正常运行。原因何在？IDEA编译器报告错误，但项目可以正常运行。原因何在？

@Component
public class MyUserDetailsService implements UserDetailsService {

    @Resource
    MyRBACService myRBACService;

    @Override
    public UserDetails loadUserByUsername(String username)
                                      throws UsernameNotFoundException {

        //加载基础用户信息
        MyUserDetails myUserDetails = myRBACService.findByUserName(username);

        //加载用户角色列表
        List<String> roleCodes = myRBACService.findRoleByUserName(username);

        List<String> authorities = new ArrayList<>();
        for(String roleCode : roleCodes){
          //通过用户角色列表加载用户的资源权限列表
          authorities.addAll(myRBACService.findApiByRoleCode(roleCode));
        }

        //角色是一个特殊的权限，ROLE_前缀
        roleCodes = roleCodes.stream()
                .map(rc -> "ROLE_" +rc)
                .collect(Collectors.toList());

        authorities.addAll(roleCodes);

        myUserDetails.setAuthorities(
                AuthorityUtils.commaSeparatedStringToAuthorityList(
                        String.join(",",authorities)
                )
        );


        return myUserDetails;
    }
}

public class JWTAutoConfigure {

    @Resource
    private JwtProperties jwtProperties;


    @Bean
    public JwtTokenUtil jwtTokenUtil() {
        return new JwtTokenUtil(jwtProperties);
    }

    @Bean
    public JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter(
            JwtTokenUtil jwtTokenUtil,
            MyUserDetailsService myUserDetailsService) {
        return new JwtAuthenticationTokenFilter(
                this.jwtProperties,jwtTokenUtil,myUserDetailsService);
    }
}

Answer 1

因为您的bean有一个接口，所以将使用JDK动态代理机制，并且您的bean定义将具有class/type=userDetailsService和name=myuserDetailsService。接下来，重要的是要知道Spring在默认情况下是按类型注入的。这就是为什么它会抱怨，因为您应该将bean注入为UserDetailsService。如果您有多个这种类型的bean，您应该添加@qualifier（“MyUserDetailsService”）。

  @Bean
  public JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter(JwtTokenUtil jwtTokenUtil, 
                                                                   UserDetailsService userDetailsService) {
       return new JwtAuthenticationTokenFilter(this.jwtProperties, jwtTokenUtil, userDetailsService);
  }