pom.xml

     
         
      
       4.0.0
          
      
       com.itcast.it
          
      
       spring-boot
          
      
       1.0.0-SNAPSHOT
          
              
       
        org.springframework.boot
               
       
        spring-boot-starter-parent
               
       
        2.1.1.RELEASE
           
          
              
               
                   
        
         org.springframework.boot
                    
        
         spring-boot-starter-web
                
           
      
     

　　

BootDemoApplication.java

package cn.itcast;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplicationpublic class BootDemoApplication {    //psvm 快速创建main    public static void main(String[] args) {        SpringApplication.run(BootDemoApplication.class,args);    }}