SpringBoot——整合 Listener

1. 通过注解扫描完成 Listener 组件的注册

1.1 编写 Listener

/**
 * springBoot 整合 Listener
 *
 *<listener>
 * <listener-class>com.bjsxt.listener.FirstListener</listener-class>
 *</listener>
 */
@WebListener
public class Listener1 implements ServletContextListener {
    @Override
    public void contextInitialized(ServletContextEvent servletContextEvent) {
        System.out.println("listener...init...");
    }

    @Override
    public void contextDestroyed(ServletContextEvent servletContextEvent) {

    }
}

1.2 启动类

@EnableAutoConfiguration
@ServletComponentScan("com.zth")
public class App {
    public static void main(String[] args){
        // 启动 SpirngBoot 项目
        SpringApplication.run(App.class,args);
    }
}

2. 通过方法完成 Listener 组件注册

2.1 编写 Listener

@SpringBootApplication
public class App2 {
    public static void main(String[] args){
        // 启动 SpirngBoot 项目
        SpringApplication.run(App2.class,args);
    }

    @Bean
    public ServletListenerRegistrationBean listenerRegistrationBean (){
        ServletListenerRegistrationBean bean = new ServletListenerRegistrationBean(new Listener2());
        return bean;
    }
    
}