整合方式一：通过注解扫描完成 Listener 组件的注册
1、编写listener
package com.bjsxt.listener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
/**
* Created by Administrator on 2019/2/5.
*/
@WebListener
public class FirstListener implements ServletContextListener{
@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
System.out.println("FirstListener初始化......");
}
@Override
public void contextDestroyed(ServletContextEvent servletContextEvent) {
}
}
2、编写启动类
package com.bjsxt;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
/**
* Created by Administrator on 2019/2/4.
*/
@SpringBootApplication
@ServletComponentScan //在springboot启动时，会扫描@WebServlet、@WebFilter、@WebListener等，并将该类实例化
public class App {
public static void main(String[] args){
SpringApplication.run(App.class,args);
}
}
整合方式二：通过方法完成 Listener 组件注册
1、编写listener
package com.bjsxt.listener;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import javax.servlet.annotation.WebListener;
/**
* Created by Administrator on 2019/2/5.
*/
public class SecondListener implements ServletContextListener{
@Override
public void contextInitialized(ServletContextEvent servletContextEvent) {
System.out.println("SecondListener初始化......");
}
@Override
public void contextDestroyed(ServletContextEvent servletContextEvent) {
}
}
2、编写启动类
package com.bjsxt;
import com.bjsxt.filter.SecondFilter;
import com.bjsxt.listener.SecondListener;
import com.bjsxt.servlet.SecondServlet;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
/**
* Created by Administrator on 2019/2/4.
*/
@SpringBootApplication
public class App2 {
public static void main(String[] args){
SpringApplication.run(App2.class,args);
}
/**
* 注册Servlet
* @return
*/
@Bean
public ServletRegistrationBean getServletRegistrationBean(){
ServletRegistrationBean bean = new ServletRegistrationBean(new SecondServlet());
bean.addUrlMappings("/second");
return bean;
}
/**
* 注册Filter
* @return
*/
@Bean
public FilterRegistrationBean getFilterRegistrationBean(){
FilterRegistrationBean bean = new FilterRegistrationBean(new SecondFilter());
bean.addUrlPatterns(new String[]{"/second"});
return bean;
}
/**
* 注册Listener
* @return
*/
@Bean
public ServletListenerRegistrationBean<SecondListener> getServletListenerRegistrationBean(){
ServletListenerRegistrationBean<SecondListener> bean = new ServletListenerRegistrationBean<SecondListener>(new SecondListener());
return bean;
}
}
运行启动类，监听器初始化输出的信息就会在控制台输出