监听器

创建监听器

//创建RequestListener
public class RequestListener implements ServletRequestListener {
    @Override
    public void requestDestroyed(ServletRequestEvent servletRequestEvent){
        System.out.println("初始化 Request");
    }

    @Override
public void requestInitialized(ServletRequestEvent 
servletRequestEvent) {
        System.out.println("销毁  Request");
    }
}

配置web.xml

//配置web.xml文件
<listener>
    <listener-class>com.study.listener. RequestListener</listener-class>
</listener>