Springboot登录验证的统一拦截处理的实现

public class UserHolder {
    public static final ThreadLocal<User> userThreadLocal = new ThreadLocal<>();
    public static void setValue(User user){
        userThreadLocal.set(user);
    }
    public static User getValue(){
        return userThreadLocal.get();
    }
    public static  void clear(){
        userThreadLocal.remove();
    }
}

public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        // 获取 session
        HttpSession session = request.getSession();
        // 检查用户是否已登录
        if (session.getAttribute("user") == null) {
            // 用户未登录，进行相关处理
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        // 从 session 中获取用户数据
        User user = (User) session.getAttribute("user");
        // 将用户数据存储到 ThreadLocal 中，以便在整个请求周期内访问
        UserHolder.setValue(user);
        // 进行其他逻辑验证，根据需求自行添加
        return true; // 允许请求继续执行
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                           ModelAndView modelAndView) throws Exception {
        // 在请求处理之后执行，可以对 ModelAndView 进行修改
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        // 在请求完成之后执行，用于资源清理等操作
        // 清理 ThreadLocal 中的用户数据，防止内存泄漏
        UserHolder.clear();
    }
}

@Configuration
public class MvcConfig implements WebMvcConfigurer {
    public void addInterceptors(InterceptorRegistry registry) {
        // 添加拦截器
        // excludePath 就是排除在外被拦截的路径
        registry.addInterceptor(new LoginInterceptor())
            	.addPathPatterns("/**")  
                .excludePathPatterns(
                        "/user/login"
                );
    }
}

@RestController
@RequestMapping("/user")
public class UserController {
    @Resource
    private UserService userService;
    @PostMapping("/login")
    public BaseResponse<User> login(HttpSession session){
        System.out.println("Hello");
        Random random = new Random(new Date().getTime()) ;
        User user = new User(random.nextLong(), "123","123454","123");
        session.setAttribute("user",user);
        return ResultUtils.success(user);
    }
    @GetMapping("/get")
    public BaseResponse<User> get(){
        return ResultUtils.success(UserHolder.getValue());
    }
}