Springboot+Vue 攔截器解決跨域

問題使用攔截器session值無法獲取到

需求：用戶登錄成功將登錄信息存放在session中，攔截器根據獲取session,判斷是否session中的值過期，但是攔截器無法獲取到session中的值
代碼展示：
登錄：

	//登陸
    @PostMapping("/login")
    public ResponseResult userLogin (HttpServletRequest request,@RequestBody LoginPojo_ loginPojo_){
        ResponseResult responseResult = new ResponseResult();
        Admin admin = adminService.selectAdminId(loginPojo_.getUsername(),loginPojo_.getPassword());
        if (ObjectUtils.isEmpty(admin) || admin == null) {
            responseResult.setCode(100);
            responseResult.setMessage("用戶名密碼錯誤");
            //清空session
            request.getSession().invalidate();
            return responseResult;
        } else if (loginPojo_.getValidateCode().equals("")){
            responseResult.setCode(100);
            responseResult.setMessage("請輸入驗證碼");
            //清空session
            request.getSession().invalidate();
            return responseResult;
        } else{
            responseResult.setCode(200);
            responseResult.setMessage("登陸成功");
            responseResult.setData(admin);
            //保存到session中
            request.getSession().setAttribute("username",admin.getUsername());
            //設置session過期時間(單位秒)
            request.getSession().setMaxInactiveInterval(120);
        }
        return responseResult;
    }

配置攔截器：

@Component
public class CarInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession();
        String sessionName = (String) session.getAttribute("username");
        if(Objects.isNull(sessionName)){
            try {
                response.reset();
                response.setContentType("application/json");
                response.setCharacterEncoding("UTF-8");
                response.setStatus(200);
                PrintWriter pw = response.getWriter();
                //封裝返回對象
                ResponseResult responseResult = new ResponseResult();
                responseResult.setCode(403);
                responseResult.setData(Collections.emptyMap());
                responseResult.setMessage("登錄超時，請請重新登錄");
                pw.write(JSONObject.toJSONString(responseResult));
                pw.flush();
            } catch (Exception e) {
                e.printStackTrace();
            }
            //登錄超時
            return false;
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}

註冊攔截器：

@Configuration
class CarWebInterceptorConfig extends WebMvcConfigurerAdapter {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //不攔截路徑
        List<String> urls = new ArrayList<>();
        urls.add("/api/user/login");
        urls.add("/api/select/carbrand");
        urls.add("/api/user/shiro");
        registry.addInterceptor(new CarInterceptor())
                .addPathPatterns("/**")
                .excludePathPatterns(urls);
        super.addInterceptors(registry);
    }
}

問題：攔截器獲取到的session一直爲空
解決方法：

//在controller層添加以下註解，表示開啓cookie
@CrossOrigin(allowCredentials = "true")

前端需要添加以下配置：

//在main.js中添加以下配置：
axios.defaults.withCredentials = true

但是這時候又會出現跨域問題：
解決方法：

 @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession();
        String sessionName = (String) session.getAttribute("username");
        if(Objects.isNull(sessionName)){
            try {
                response.reset();
                response.setContentType("application/json");
                response.setCharacterEncoding("UTF-8");
                response.setStatus(200);
//                response.setHeader("Cache-Control", "no-store");
//                response.setHeader("Access-Control-Allow-Origin", "*");
                response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
                response.setHeader("Access-Control-Allow-Methods", "*");
                response.setHeader("Access-Control-Max-Age", "3600");
                response.setHeader("Access-Control-Allow-Credentials", "true");
                PrintWriter pw = response.getWriter();
                ResponseResult responseResult = new ResponseResult();
                responseResult.setCode(403);
                responseResult.setData(Collections.emptyMap());
                responseResult.setMessage("登錄超時，請請重新登錄");
                pw.write(JSONObject.toJSONString(responseResult));
                pw.flush();
            } catch (Exception e) {
                e.printStackTrace();
            }
            //登錄超時
            return false;
        }
        return true;
    }
    ```