(三)、SpringBoot 自定义 interceptor(拦截器)

系统管理员 2022-05-30 12:08 359阅读 0赞

可以前往第一篇博客查看目录结构 --> [这里][Link 1]

一、创建interceptor包

![201803121139456][]

二、在interceptor包下创建TimeInterceptor类,自定义Interceptor

@Component
    public class TimeInterceptor implements HandlerInterceptor {
    
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
            System.out.println("interceptor preHandle");
            System.out.println(((HandlerMethod)handler).getBean().getClass().getName());
            System.out.println(((HandlerMethod)handler).getMethod().getName());
            request.setAttribute("start",new Date().getTime());
            return true;
        }
    
        @Override
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
            System.out.println("interceptor postHandle");
        }
    
        @Override
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
            System.out.println("interceptor afterCompletion");
            long start = (long) request.getAttribute("start");
            System.out.println("interceptor耗时： " + (new Date().getTime() - start));
        }
    }

三、在config包下的WebConfig类下添加下述代码，配置自定义的TimeInterceptor进入

@Autowired
        private TimeInterceptor timeInterceptor;
    
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
            registry.addInterceptor(timeInterceptor);
        }

四、访问 localhost/user ，查看IDEA控制台即可

[Link 1]: http://blog.csdn.net/zeketao/article/details/79522968
[201803121139456]: /images/20220530/eb6727a41cff49eaa3fd34a1eab0acb4.png