拦截器

自定义拦截器实现HandlerInterceptor接口的三个方法。

public class MyInterceptor implements HandlerInterceptor{
  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    //拦截内容
    
    //放行
    return true;
  }

  @Override
  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    //请求来时执行
  }

  @Override
  public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
    //响应来时执行
  }
}

springmvc配置文件

//将拦截器放入mvc容器中
  @Bean
  public MyInterceptor myInterceptor(){
    return new MyInterceptor();
  }
//添加拦截器，并配置拦截路径
  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    //配置拦截器
    registry.addInterceptor(myInterceptor()).addPathPatterns("/**");
  }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。