場景

自定義攔截器，通過繼承WebMvcConfigureAdapter然后重寫父類中的方法進行擴展。

項目搭建專欄：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/column/info/35688

實現

在項目下新建interceptor包

在包下新建MyInterceptor.java

package com.example.demo.interceptor;import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; @Configuration//聲明這是一個配置 public class MyInterceptor extends WebMvcConfigurerAdapter {@Overridepublic void addInterceptors(InterceptorRegistry registry) {// TODO Auto-generated method stubHandlerInterceptor inter = new HandlerInterceptor() {@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)throws Exception {System.out.println("自定義攔截器。。。。。。。。。。");return true;}@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,ModelAndView modelAndView) throws Exception {// TODO Auto-generated method stubHandlerInterceptor.super.postHandle(request, response, handler, modelAndView);}@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler,Exception ex) throws Exception {// TODO Auto-generated method stubHandlerInterceptor.super.afterCompletion(request, response, handler, ex);}};//攔截器的注冊registry.addInterceptor(inter).addPathPatterns("/**");//攔截所有}}

在項目啟動類中添加當前包為掃描包

@SpringBootApplication(scanBasePackages= {"com.example.demo.controller","com.example.demo.service","com.example.demo.interceptor"})

啟動項目，訪問一個Controller

源碼下載

https://download.csdn.net/download/badao_liumang_qizhi/11076859

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