Spring安全从更深层次访问UserDetailsS​​ervice

Question

我有以下 UserDetailsS​​ervice 实现。
到目前为止，身份验证过程运行良好。
如何将我的“MyUser bean”（成功登录）存储在“会话”中，以便我可以在应用程序的其他区域访问它

谢谢。

@Transactional(readOnly = true)
public class CustomUserDetailsService implements UserDetailsService {


    private EmployeesApi employeesApi = new EmployeesApi();

    /**
     * Retrieves a user record containing the user's credentials and access. 
     */
    public UserDetails loadUserByUsername(String userName)
            throws UsernameNotFoundException, DataAccessException {

        // Declare a null Spring User
        UserDetails user = null;

        try {


            MyUser employee = employeesApi.getByUserName(userName);



            user =  new User(
                    employee.getUserName(), 
                    employee.getPassword().toLowerCase(),
                    true,
                    true,
                    true,
                    true,
                    getAuthorities(1) );

        } catch (Exception e) {
            logger.error("Error in retrieving user");
            throw new UsernameNotFoundException("Error in retrieving user");
        }


    }
    ....

Answer 1

Spring Security 已经在会话中为您存储了经过身份验证的用户的 UserDetails。

因此，在会话中存储MyUser 的最简单方法是实现一个自定义UserDetails，其中包含对MyUser 的引用：

public class MyUserDetails extends User {
    private MyUser myUser;
    public MyUserDetails(..., MyUser myUser) {
        super(...);
        this.myUser = myUser;
    }
    public MyUser getMyUser() {
        return myUser;
    }
    ...
}

然后从你的UserDetailsService返回它：

MyUser employee = employeesApi.getByUserName(userName);
user =  new MyUserDetails(..., myUser);

然后您可以通过安全上下文轻松访问MyUser：

MyUser myUser = ((MyUserDetails) SecurityContextHolder
    .getContext().getAuthentication().getPrincipal()).getMyUser();

在 Spring MVC 控制器中：

@RequestMapping(...)
public ModelAndView someController(..., Authentication auth) {
    MyUser myUser = ((MyUserDetails) auth.getPrincipal()).getMyUser();
    ...
}

在 JSP 中：

<security:authentication var = "myUser" property="principal.myUser" />