我与“春天框架”合作,我从许多对手表绘制一套角色图时遇到问题。 让我向各位介绍我的班子。

public class Role {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @NonNull
    private String authority;

    @ManyToMany(mappedBy = "roles", fetch = FetchType.EAGER/*, cascade=CascadeType.MERGE*/)
    private Set<AppUser> appUsers;

    public Role(@NonNull String authority) {
        this.authority = authority;
    }

    public Role() {

    }
}

public class AppUser implements Serializable {
    @Serial
    private static final long serialVersionUID = -8357820005040969853L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    //    @NonNull
    @Column(unique = true)
    private /*final*/ String username;

    //    @NonNull
    private /*final*/ String password;

    @ManyToMany(fetch = FetchType.EAGER/*, cascade=CascadeType.MERGE*/)
//    @NonNull
    @JoinTable(name = "users_roles",
            joinColumns = @JoinColumn(name = "role_id"/*, referencedColumnName = "id"*/),
            inverseJoinColumns = @JoinColumn(name = "user_id"/*, referencedColumnName = "id"*/))
    private Set<Role> roles;
    }

这里是储蓄过程:

    @Bean
//    @Transactional
    public CommandLineRunner run(RoleRepository roleRepository, UserRepository userRepository, PasswordEncoder passwordEncoder) {
        return args -> {
            if (roleRepository.findByAuthority("ADMIN").isEmpty()) {
                Role admin = roleRepository.save(new Role("ADMIN"));
                Role user = roleRepository.save(new Role("USER"));

                userRepository.save(new AppUser("admin", passwordEncoder.encode("admin"), new HashSet<>() {
                    {
                        add(admin);
                        add(user);
                    }
                }));
            }
        };
    }

此时此刻,我想恢复用户的作用:

@Component
public class UserInterceptor implements HandlerInterceptor {
    private final UserRepository userRepository;
    private final RoleRepository roleRepository;

    public UserInterceptor(UserRepository userRepository, RoleRepository roleRepository) {
        this.userRepository = userRepository;
        this.roleRepository = roleRepository;
    }

    @Override
    public void postHandle(@NonNull HttpServletRequest request,
                           @NonNull HttpServletResponse response,
                           @NonNull Object handler,
                           ModelAndView modelAndView) {
        if (modelAndView != null) {
            Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
            Optional<AppUser> appUser = userRepository.findByUsername(authentication.getName());

            if (appUser.isPresent()) {
                Set<Role> set = roleRepository.findByAppUsers(new HashSet<>() {
                    {
                        add(appUser.get());
                    }
                });
                log.info("Roles for user {}: {}", appUser.get().getUsername(), appUser.get().getRoles());
                modelAndView.addObject("username", appUser.get().getUsername());
                modelAndView.addObject("roles", appUser.get().getRoles());
            } else
                modelAndView.addObject("username", "anonymous");
        }
    }
}

最令人感兴趣的部分是,当我把“行政”改为“行政”,就会看到我的用户在数据库中,我实际上在“联合国”一词中具有价值。 在检查存在后,我只建立了一套简单的检查套,在我通过用户物体检索的一套作用之后,它是否描绘了特定用户的作用。

And now comes the magic part: if I try to get roles from the user doing appUser.get().getRoles(), I get EMPTY SET OF ROLES IN THE appUser OBJECT. I mean, I could have tried to get all roles using an extra set created by userRepository.findByUsername, but I feel like it shouldn t work this way. Can anyone help me please, I would appreciate it and it would help me to get Spring framework. Thanks in advance. P.S. Here is the table from the database and yes, names of columns are messed up, I ve fixed it already.