springboot整合listener方式二

1. 创建一个项目

2. package com.test;
   
   import org.springframework.boot.SpringApplication;
   import org.springframework.boot.autoconfigure.SpringBootApplication;
   import org.springframework.boot.web.servlet.FilterRegistrationBean;
   import org.springframework.boot.web.servlet.ServletComponentScan;
   import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
   import org.springframework.boot.web.servlet.ServletRegistrationBean;
   import org.springframework.context.annotation.Bean;
   import org.springframework.util.concurrent.ListenableFutureCallbackRegistry;
   
   import com.test.filter.SecondFilter;
   import com.test.listener.SecondListener;
   import com.test.servlet.Hello02Servlet;
   
   @SpringBootApplication
   public class App2 {
   	public static void main(String[] args) {
   		SpringApplication.run(App2.class, args);
   	}
   	@Bean
   	public ServletListenerRegistrationBean<SecondListener> getListener(){
   		ServletListenerRegistrationBean bean=new ServletListenerRegistrationBean(new SecondListener());
   		return bean;
   	}
   }
   

3. 创建一个listener

4. package com.test.listener;
   
   import javax.servlet.ServletContextEvent;
   import javax.servlet.ServletContextListener;
   import javax.servlet.annotation.WebListener;
   
   import org.apache.catalina.SessionEvent;
   import org.apache.catalina.SessionListener;
   /***
    * <listener>
    * 		<listener-class>com.test.listener.FirstListener</listener-class>
    * </listener>
    * @author 26920
    *
    */
   public class SecondListener implements ServletContextListener{
   	@Override
   	public void contextInitialized(ServletContextEvent sce) {
   		// TODO Auto-generated method stub
   		System.out.println("ServletContext初始化完成==========");
   	}
   	@Override
   	public void contextDestroyed(ServletContextEvent sce) {
   		// TODO Auto-generated method stub
   		System.out.println("ServletContxt销毁了============");
   	}
   }