ServletContextListener 在springboot 中的使用

1.实现ServletContextListener 

/**
 * 自定义监听器，用来监听系统启动，和注销
 */
@WebListener
public class SystemListener implements ServletContextListener {
    Logger logger = LoggerFactory.getLogger(SystemListener.class);
    @Override
    public void contextInitialized(ServletContextEvent servletContextEvent) {
    
        //设置全局变量
        logger.info("系统启动了");
    }

    @Override
    public void contextDestroyed(ServletContextEvent servletContextEvent) {
        logger.info("系统注销了");
    }
}

2.启动类中加上@ServletComponentScan注解

//启动
@SpringBootApplication
@EnableScheduling
@ServletComponentScan
public class AdminController {

    private Logger logger = LoggerFactory.getLogger(AdminController.class);

    public static void main(String[] args) {
        SpringApplication.run(AdminController.class, args);
    }

}