Servlet3.0的注解自定义原生Listener监听器实战

简介：监听器介绍和Servlet3.0的注解自定义原生Listener监听器实战

　　自定义Listener(常用的监听器 servletContextListener、httpSessionListener、servletRequestListener)

　　代码示例：

　　RequestListener.java

 package net.xdclass.demo.listener;

 import javax.servlet.ServletContextEvent;
 import javax.servlet.ServletContextListener;
 import javax.servlet.annotation.WebListener;

 @WebListener
 public class CustomContextListener implements ServletContextListener{

     //主要作为资源加载
     @Override
     public void contextInitialized(ServletContextEvent sce) {
         System.out.println("======contextInitialized========");

     }

     @Override
     public void contextDestroyed(ServletContextEvent sce) {
         System.out.println("======contextDestroyed========");

     }

 }

　　

　　CustomContextListener.java：

 package net.xdclass.demo.listener;

 import javax.servlet.ServletRequestEvent;
 import javax.servlet.ServletRequestListener;
 import javax.servlet.annotation.WebListener;

 @WebListener
 public class RequestListener implements ServletRequestListener {

     //主要作为统计
     @Override
     public void requestDestroyed(ServletRequestEvent sre) {
         // TODO Auto-generated method stub
         System.out.println("======requestDestroyed========");
     }

     @Override
     public void requestInitialized(ServletRequestEvent sre) {
         System.out.println("======requestInitialized========");

     }

 }