Springboot整合springmvc拦截器

分析步骤：

1.编写拦截器（实现HandlerInterceptor）

package com.itheima.interceptor; import lombok.extern.slf4j.Slf4j; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @Slf4j public class MyInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { log.debug("这是MyInterceptor的preHandle方法。"); return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { log.debug("这是MyInterceptor的postHandle方法。"); } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { log.debug("这是MyInterceptor的afterCompletion方法。"); } }

2.编写配置类实现WebMvcConfigurer,在该类中添加各种组件。

package com.itheima.config; import com.itheima.interceptor.MyInterceptor; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; @Configuration public class MvcConfig implements WebMvcConfigurer { //注册拦截器 @Bean public MyInterceptor myInterceptor(){ return new MyInterceptor(); } //添加拦截器到spring mvc拦截器链 @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor(myInterceptor()).addPathPatterns("/*"); } }

可以在Springboot项目中通过配置类添加各种组件