SpringBoot----整合 Listener

一.通过注解扫描完成 Listener 组件的注册

1.1 编写 Listener

package com.bjsxt.listener; import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener; import javax.servlet.annotation.WebListener; /** * springBoot整合Listener * *<listener> * <listener-class>com.bjsxt.listener.FirstListener</listener-class> *</listener> */ @WebListener public class FirstListener implements ServletContextListener { @Override public void contextDestroyed(ServletContextEvent arg0) { // TODO Auto-generated method stub } @Override public void contextInitialized(ServletContextEvent arg0) { System.out.println("Listener...init......"); } }

1.2 编写启动类

package com.bjsxt; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletComponentScan; /** * springBoot整合Listener方式一 * * */ @SpringBootApplication @ServletComponentScan public class App { public static void main(String[] args) { SpringApplication.run(App.class, args); } }

二.通过方法完成 Listener 组件注册

2.1 编写 Listener

package com.bjsxt.listener; import javax.servlet.ServletContextEvent; import javax.servlet.ServletContextListener; /** * springBoot整合Listener方式二。 * * */ public class SecondListener implements ServletContextListener { @Override public void contextDestroyed(ServletContextEvent arg0) { // TODO Auto-generated method stub } @Override public void contextInitialized(ServletContextEvent arg0) { System.out.println("SecondListener..init....."); } }

2.2 编写启动类

package com.bjsxt; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletListenerRegistrationBean; import org.springframework.context.annotation.Bean; import com.bjsxt.listener.SecondListener; /** * SpringBoot整合Listener方式二 * * */ @SpringBootApplication public class App2 { public static void main(String[] args) { SpringApplication.run(App2.class, args); } /** * 注册listener */ @Bean public ServletListenerRegistrationBean<SecondListener> getServletListenerRegistrationBean(){ ServletListenerRegistrationBean<SecondListener> bean= new ServletListenerRegistrationBean<SecondListener>(new SecondListener()); return bean; } }