SpringBoot整合listener两种方式

末蓝、 2022-01-10 01:27 380阅读 0赞

1.创建maven项目，导入springboot的maven依赖  
pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
    	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    	<modelVersion>4.0.0</modelVersion>
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>1.5.2.RELEASE</version>
    	</parent>
    
    	<groupId>per.czt.04-spring-boot-listener</groupId>
    	<artifactId>04-spring-boot-listener</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<packaging>jar</packaging>
    
    	<name>04-spring-boot-listener</name>
    	<url>http://maven.apache.org</url>
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<java.version>1.7</java.version>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>junit</groupId>
    			<artifactId>junit</artifactId>
    			<version>3.8.1</version>
    			<scope>test</scope>
    		</dependency>
    
    		
    		
    
    		
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    	</dependencies>
    </project>

方式一：通过注解扫描方式整合listener  
FirstListener.Class

package per.czt.listener;
    
    import javax.servlet.ServletContextEvent;
    import javax.servlet.ServletContextListener;
    import javax.servlet.annotation.WebListener;
    /*
     * <listener>
     * 		<listener-class>per.czt.listener.FirstListener</listener-class>
     * 
     * 
     * </listener>
     * 
     * 
     */
    
    @WebListener
    public class FirstListener implements ServletContextListener {
    
    	public void contextInitialized(ServletContextEvent sce) {
    		System.out.println("FirstListener init...");
    
    	}
    
    	public void contextDestroyed(ServletContextEvent sce) {
    		// TODO Auto-generated method stub
    
    	}
    
    }

SecondListener.Class  
启动类：App.Class

package per.czt;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.web.servlet.ServletComponentScan;
    
    /**
     * Hello world!
     *
     */
    @SpringBootApplication
    @ServletComponentScan
    public class App 
    {
        public static void main( String[] args )
        {
        	
           SpringApplication.run(App.class,args);
        }
    }

方式二：通过编写方法的方式整合listener  
SecondListener.Class

package per.czt.listener;
    
    import javax.servlet.ServletContextEvent;
    import javax.servlet.ServletContextListener;
    
    public class SecondListener implements ServletContextListener {
    
    	public void contextInitialized(ServletContextEvent sce) {
    		System.out.println("SecondListener init...");
    
    	}
    
    	public void contextDestroyed(ServletContextEvent sce) {
    		// TODO Auto-generated method stub
    
    	}
    
    }

启动类：App2.Class

package per.czt;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
    import org.springframework.context.annotation.Bean;
    
    import per.czt.listener.SecondListener;
    
    @SpringBootApplication
    public class App2 {
    
    	public static void main(String[] args) {
    		SpringApplication.run(App2.class, args);
    
    	}
    	@Bean
    	public ServletListenerRegistrationBean<SecondListener> getServletListenerRegistrationBean(){
    		ServletListenerRegistrationBean<SecondListener> listener=new ServletListenerRegistrationBean<SecondListener>(new SecondListener());
    	    return listener;
    	}
    
    }