关于Redis解决Session共享问题

@Resource
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public Result sendCode(String phone, HttpSession session) {
        // 1.校验手机号
        if (phone == null || str.matches("^1([38][0-9]|4[579]|5[0-3,5-9]|6[6]|7[0135678]|9[89])\\d{8}$")) {
            // 2.如何不符合,返回错误信息
            return Result.fail("手机号格式错误!");
        }
        // 3.符合,生成验证码
        String code = RandomUtil.randomNumbers(6);
        // 4.保存验证码到Redis
        stringRedisTemplate.opsForValue().set("login:code:" + phone,code,2, TimeUnit.MINUTES);
        //具体的发送逻辑 在这里就不实现了
        return Result.ok();
    }

public Result login(LoginFormDTO loginForm, HttpSession session) {
        // 1. 校验手机号
        String phone = loginForm.getPhone();
        if (phone == null || str.matches("^1([38][0-9]|4[579]|5[0-3,5-9]|6[6]|7[0135678]|9[89])\\d{8}$")) {
            // 如何不符合,返回错误信息
            return Result.fail("手机号格式错误!");
        }
        // 2. 校验验证码
        String cacheCode = stringRedisTemplate.opsForValue().get("login:code:" + phone);
        String code = loginForm.getCode();
        // 3. 不一致,报错
        if(cacheCode == null || !cacheCode.equals(code)) {
            return Result.fail("验证码错误!");
        }
        // 4. 一致,根据手机号查询用户 select * from tb_user where phone = ?
        User user = query().eq("phone", phone).one();
        // 5. 判断用户是否存在
        if (user == null) {
            // 6. 不存在,创建用户并保存
            user = createUserWithPhone(phone);
        }
        // 7. 保存用户信息到Redis
        String token = UUID.randomUUID().toString(true);
        UserDTO userDTO = BeanUtil.copyProperties(user, UserDTO.class);
        Map<String, Object> userMap = BeanUtil.beanToMap(userDTO,new HashMap<>()
        , CopyOptions.create().setIgnoreNullValue(true).setFieldValueEditor((fieldName,fieldValue) -> fieldValue.toString()));
        stringRedisTemplate.opsForHash().putAll("login:token:" + token,userMap);
        stringRedisTemplate.expire("login:token:" + token,30,TimeUnit.MINUTES);
        return Result.ok(token);
    }

public class UserHolder {
    private static final ThreadLocal<UserDTO> tl = new ThreadLocal<>();
    public static void saveUser(UserDTO user){
        tl.set(user);
    }
    public static UserDTO getUser(){
        return tl.get();
    }
    public static void removeUser(){
        tl.remove();
    }
}

public class LoginInterceptor implements HandlerInterceptor {
    private StringRedisTemplate stringRedisTemplate;
    public LoginInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1. 获取请求头中的token
        String token = request.getHeader("authorization");
        if(StrUtil.isBlank(token)) {
            response.setStatus(401);
            return false;
        }
        // 2. 使用token获取Redis中的对象
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries("login:token:" + token);
        // 3. 判断用户是否存在
        if(userMap == null) {
            response.setStatus(401);
            return false;
        }
        // 4. 将Hash 格式转为UserDTO对象
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        // 5. 将用户存入ThreadLocal中
        UserHolder.saveUser(userDTO);
        // 6. 刷新token超时时间
        stringRedisTemplate.expire("login:token:" + token,30,TimeUnit.MINUTES);
        return true;
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }
}

public class RefreshTokenInterceptor implements HandlerInterceptor {
    private StringRedisTemplate stringRedisTemplate;
    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1. 获取请求头中的token
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank(token)) {
            return true;
        }
        // 2. 基于token获取Redis中的用户
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries(RedisConstants.LOGIN_USER_KEY + token);
        // 3. 判断用户是否存在
        if(userMap == null) {
            return true;
        }
        // 将查询到的Hash转为UserDTO对象
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        // 5. 存在 保存用户到ThreadLocal
        UserHolder.saveUser(userDTO);
        stringRedisTemplate.expire(RedisConstants.LOGIN_USER_KEY + token,RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);
        return true;
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }
}

public class MvcConfig implements WebMvcConfigurer {
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginInterceptor())
                .excludePathPatterns(
                   "/user/code",
                   "/user/login",
                   "/blog/hot",
                   "/shop/**",
                   "/shop-type/**",
                   "/upload/**",
                   "/voucher/**"
                );
        registry.addInterceptor(new RefreshTokenInterceptor(stringRedisTemplate)).addPathPatterns("/**");
    }
}