SpringMvc自定义拦截器（注解）代码实例

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("/**");
  }

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