spring boot 从入门到精通（ 二）通过实体类生成数据库表的方式

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
 </dependency>

  <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
  </dependency><dependency>
        <groupId>