SpringMVC_拦截器(springboot)

创建

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public class MyInterceptor implements HandlerInterceptor {       @Override     public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {         System.out.println("preHandle 执行");         return true;     }       @Override     public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {         System.out.println("postHandle 执行");     }       @Override     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {         System.out.println("afterCompletion 执行");     } }

 

 

注册、指定拦截规则

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@Configuration public class MyMvcConfig implements WebMvcConfigurer{     @Override     public void addInterceptors(InterceptorRegistry registry) {         registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**") //拦截所有请求                     .excludePathPatterns("/","/login","/index.html");     } }