java - Spring 在 SecurityContextHolder 中获取自定义 UserDetails

Question

我在我的网络项目中使用 SpringSecurity。我有保存在数据库中的实体用户。我需要使用用户 ID 在 BD 中执行请求，以从该 BD 中的其他表获取任何信息。在 Spring Security 中进行身份验证后，如何从 SecurityContextHolder 获取我的用户而不是标准 Spring 用户(此用户没有 ID)？

 @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;

  + getters and setters

PS.对不起我的英语:)

Answer 1

您将在另一个类中实现 UserDetailsS​​ervice 接口(interface)和 UserDetails 接口(interface)。例如:

自定义用户详细信息服务:

@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);
        }
    }
}

自定义用户详细信息:

// 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());
    }


}

在您的 User 类中，为 hibernate 创建一个空的构造函数，并使用一个 User 实例:

@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，@Autowire CustomUserDetailsS​​ervice 并将其注入(inject)到身份验证流程中:

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 Controller 或提供程序中将经过身份验证的主体转换为您的 CustomUserDetails:

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