listener(SpringBoot如何整合Listener)

SpringBoot 整合 Listener

一.注解方式整合

1.創建Listener類實現ServletContextListener接口

• 需要@WebListener注解

packagecom.zhl.springbootweb.listener;/**整合Listener**/importjavax.servlet.ServletContextEvent;importjavax.servlet.ServletContextListener;importjavax.servlet.annotation.WebListener;@WebListenerpublicclassFirstListenerimplementsServletContextListener{@OverridepublicvoidcontextInitialized(ServletContextEventsce){System.out.println("FirstListenerinit");}@OverridepublicvoidcontextDestroyed(ServletContextEventsce){}}

2.啟動類需要@ServletComponentScan注解

@SpringBootApplication/*在SpringBoot啟動時會掃描@WebServlet,@WebFilter@WebListener注解,并將該類實例化*/@ServletComponentScanpublicclassSpringbootWebApplication{publicstaticvoidmain(String[]args){SpringApplication.run(SpringbootWebApplication.class,args);}}

3.測試

二、方法方式

1.創建Listener對象

/*整合Listener方式二*/publicclassSecondListenerimplementsServletContextListener{@OverridepublicvoidcontextInitialized(ServletContextEventsce){System.out.println("SecondListenerinit");}@OverridepublicvoidcontextDestroyed(ServletContextEventsce){}}

2.創建配置類

@ConfigurationpublicclassListenerConfig{@BeanpublicServletListenerRegistrationBeanservletListenerRegistrationBean(){ServletListenerRegistrationBeanbean=newServletListenerRegistrationBean(newSecondListener());returnbean;}}

3.測試

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