春季安防@AuthenticationPrincipal

我一直在努力@AuthenticationPrincipal，以便与自定义User类一起正常工作。遗憾的是，用户始终为空。代码如下：

控制器

@RequestMapping(value = "/", method = RequestMethod.GET)
public ModelAndView index(@AuthenticationPrincipal User user) {
    ModelAndView mav= new ModelAndView("/web/index");
    mav.addObject("user", user);
    return mav;
}

安全配置

@Configuration
@EnableWebMvcSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    CustomUserDetailsService customUserDetailsService;

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

}

自定义用户详细信息服务

@Component
public class CustomUserDetailsService implements UserDetailsService {

@Autowired
UserRepository userRepository;

@Override
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
    // Spring Data findByXY function
    return userRepository.findByUsername(username);
}

用户实体

public class User implements UserDetails{
    private String username;
    private String password;
    private Collection<Authority> authorities;

    // Getters and Setters

}

权限实体

public class Authority implements GrantedAuthority{
    private User user;
    private String role;

    // Getters and Setters

    @Override
    public String getAuthority() {
        return this.getRole();
    }
}

我已经尝试了在线找到的各种解决方案，例如，像这样转换我的自定义用户对象：

return new org.springframework.security.core.userdetails.User(user.getLogin(), user.getPassword(), true, true, true, true,  authorities);

获取活动用户的其他方法可以正常工作，但我发现@AuthenticationProvider CustomUserObject是最干净的方式，这就是为什么我想让它工作的原因。任何帮助都非常感谢。