intelij创建项目

                
     
      mysql
                 
     
      mysql-connector-java
                 
     
      runtime
             
    

add as maven project

或者重启，要不然点击run没有效果

配置server,deployment点击run

没有连接mysql报错

application.properties配置mysql

server.port = 8888   //改变端口spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf8spring.datasource.username=rootspring.datasource.password=123456spring.datasource.driver-class-name=com.mysql.jdbc.Driver