SpringBoot与数据层

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring‐boot‐starter‐jdbc</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql‐connector‐java</artifactId>
<scope>runtime</scope>
</dependency><dependency>
<groupId>org.springfra