如何在Spring-Boot-REST调用中获取用户信息？

// Step 2: 自定义UserDetailsService实现类
@Service
public class CustomUserDetailsService implements UserDetailsService {

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        // 从数据库或其他存储中根据用户名获取用户信息
        // 返回一个实现了UserDetails接口的用户对象
    }
}

// Step 3: Spring Security配置类
@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private CustomUserDetailsService userDetailsService;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService);
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        // 配置身份验证和授权规则
    }
}

// Step 4: REST控制器
@RestController
public class UserController {

    @GetMapping("/user")
    public User getUserInfo(@AuthenticationPrincipal UserDetails userDetails) {
        // 获取当前已认证的用户信息
        // 处理业务逻辑并返回用户对象
    }
}