1.导入jar包

 

             
      
       org.springframework.boot
              
      
       spring-boot-starter-parent
              
      
       2.0.1.RELEASE
              
       
          
         
             
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-web
               
              
              
                  
       
        org.mybatis.spring.boot
                   
       
        mybatis-spring-boot-starter
                   
       
        2.1.0
               
              
              
                  
       
        mysql
                   
       
        mysql-connector-java
                   
       
        8.0.17
               
              
              
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-jdbc
                   
       
        2.1.6.RELEASE
               
              
              
                  
       
        org.springframework.boot
                   
       
        spring-boot-starter-test
                   
       
        2.1.6.RELEASE
                   
       
        test
               
          
         
         
             
                  
                       
        
         org.springframework.boot
                        
        
         spring-boot-maven-plugin
                    
               
          
     

 

2.分层

配置文件：application.properties

 

 dao

 

service

serviceimpl

 

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