SpringBoot 官方文档示例：(60)使用ServletListenerRegistrationBean注册ServletContextListener

一、定义ServletContextListener:

package com.example.config;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

public class MyServletContextListener implements ServletContextListener {

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        System.out.println("init......");
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        System.out.println("destroyed......");
    }
}

2.配置ServletListenerRegistrationBean

package com.example.config;

import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ServletListenerRegistrationConfig {

    @Bean
    public ServletListenerRegistrationBean<MyServletContextListener> initServletListenerRegistrationBean() {
        ServletListenerRegistrationBean<MyServletContextListener> servletListenerRegistrationBean = new ServletListenerRegistrationBean<>();
        servletListenerRegistrationBean.setListener(new MyServletContextListener());

        return servletListenerRegistrationBean;
    }


}

3.启动应用，可以看到输出: