Spring Boot的listener(监听器)简单使用实例详解

 @Bean
  public ServletListenerRegistrationBean servletListenerRegistrationBean(){
    ServletListenerRegistrationBean servletListenerRegistrationBean = new ServletListenerRegistrationBean();
    servletListenerRegistrationBean.setListener(new IndexListener());
    return servletListenerRegistrationBean;
  }

package com.example.Listener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
public class IndexListener implements ServletContextListener{
  @Override
  public void contextDestroyed(ServletContextEvent arg0) {
    System.out.println("IndexListener contextDestroyed method");
  }
  @Override
  public void contextInitialized(ServletContextEvent arg0) {
    System.out.println("IndexListener contextInitialized method");
  }
}

package com.example.Listener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
@WebListener
public class IndexListener2 implements ServletContextListener{
  @Override
  public void contextDestroyed(ServletContextEvent arg0) {
    System.out.println("IndexListener2 contextDestroyed method");
  }
  @Override
  public void contextInitialized(ServletContextEvent arg0) {
    System.out.println("IndexListener2 contextInitialized method");
  }
}

@SpringBootApplication
@ServletComponentScan
public class SpringBootSimpleApplication {
  public static void main(String[] args) {
    SpringApplication.run(SpringBootSimpleApplication.class, args);
  }
}