您将在另一个类中实现UserDetailsS​​ervice接口和UserDetails接口。例如：

You would implement the UserDetailsService interface and the UserDetails interface in another class. For example:

CustomUserDetailsS​​ervice：

CustomUserDetailsService:

@Service("customUserDetailsService")
public class CustomUserDetailsService implements UserDetailsService {
    // your UserRepository for your user
    private final UserRepository userRepository;

    @Autowired
    public CustomUserDetailsService(UserRepository userRepository) {
        this.userRepository = userRepository;
    }


    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = userRepository.findByUsername(username);
        if (null == user || ! user.getUsername().equals(username)) {
            throw new UsernameNotFoundException("No user present with username: " + username);
        } else {

            return new CustomUserDetails(user);
        }
    }
}

CustomUserDetails：

CustomUserDetails:

// You want to extend your User class here
public class CustomUserDetails extends User implements UserDetails {
    private static final long serialVersionUID = 1L;
    private Users user;

    public CustomUserDetails(User user) {
        super(user);
        this.user = user;
    }

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        // You don't talk about UserRoles, so return ADMIN for everybody or implement roles. 
        return AuthorityUtils.commaSeparatedStringToAuthorityList("ROLE_ADMIN");
    }

    @Override
    public boolean isAccountNonExpired() {
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }

    @Override
    public boolean isEnabled() {
        // just for example
        return this.user.getActive() == true;
    }

    @Override
    public String getUsername() {
        return this.user.getUsername();
    }

    @Override
    public String getPassword() {
        return this.user.getPassword();
    }

    // Just an example to put some addititional Data to your logged in user

    public String getUserDatabase() {
        return "usertable" + Integer.toString(1 + this.user.getUserId());
    }


}

在你的用户类，为hibernate创建一个空构造函数，以及一个带有User实例的构造函数：

In your User class, create an empty constructor for hibernate, and one that takes a User instance:

@Entity
@Table(name = "users")
public class User{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private int id;

    @Column(name = "name")
    private String name;

    @Column(name = "login")
    private String login;

    @Column(name = "password")
    private String password;

    public User() {}

    public User(User user) {
        this.id = user.getId();
        this.name = user.getName();
        // … the same for all properties.
    }
}

在您的WebSecurityConfig中， @自动装载 CustomUserDetailsS​​ervice 并在auth流程中注入：

In your WebSecurityConfig, @Autowire the CustomUserDetailsService and inject it in the auth flow:

public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
    private final
    UserDetailsService service;

    @Autowired
    public WebSecurityConfig(UserDetailsService service) {
        this.service = service;
    }

    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
    auth.userDetailsService(service).passwordEncoder(passwordEncoder());

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

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        //left out because not related here
    }
}

就是这样。您现在可以在每个控制器或提供程序中将经过身份验证的主体转发给您的CustomUserDetails：

And that's it. You can now cast the authenticated principal to you CustomUserDetails in every controller or in a provider with:

CustomUserDetails userDetails = 
    (CustomUserDetails) SecurityContextHolder
        .getContext()
        .getAuthentication()
        .getPrincipal();