How to implement an interceptor in springboot

This article introduces you how to achieve an interceptor in springboot, the content is very detailed, interested friends can refer to, hope to be helpful to you.

Step 1: implement the interceptor

Implement interface handlerIntercepto

Public class ApiInterceptor implements HandlerInterceptor {

Implement the interface method

Public boolean preHandle (HttpServletRequest request, HttpServletResponse response, Object handler) throws Exceptionpublic void postHandle (HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exceptionpublic void afterCompletion (HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception step 2: configure the interceptor

Inherit configuration class WebMvcConfigurationSupport

Public class WebConfig extends WebMvcConfigurationSupport

Implement the method of adding interceptors

@ Override protected void addInterceptors (InterceptorRegistry registry) {/ / configure the request String addPathPatterns to be intercepted [] = {"/ boot/**"}; / / filter the request String excludePathPatterns to be intercepted [] = {""}; / / add interceptor registry.addInterceptor (new ApiInterceptor ()) .addPathPatterns (addPathPatterns) .intercepdePathPatterns (excludePathPatterns);}}

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