springboot攔截器的攔截與不攔截

//登陸攔截器public class LoginInterceptor implements HandlerInterceptor {
 
 
    //訪問controller之前被調用
 
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session=request.getSession();
        if(null!=session.getAttribute("admin"))
            return true;
        return false;
    }
 
    //訪問controller之后 訪問視圖之前被調用
 
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable ModelAndView modelAndView) throws Exception {
 
    }
 
    //訪問視圖之后被調用
 
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable Exception ex) throws Exception {
 
    }
}

攔截器配置類
@Configuration
public class MyWebAppConfigurer extends WebMvcConfigurerAdapter {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // 多個攔截器組成一個攔截器鏈
        // addPathPatterns 用於添加攔截規則
        // excludePathPatterns 用戶排除攔截
 
        registry.addInterceptor(new LoginInterceptor())                   //添加攔截器
                               .addPathPatterns("/**")                    //攔截所有請求            
                               .excludePathPatterns("/","/admin_login","/login");    //對應的不攔截的請求
 
        super.addInterceptors(registry);
    }
}