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========");
        
    }

   
}