在maven文件里添加配置：

<!-- 集成mysql连接 -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.22</version>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

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

再在application.properties里添加：

server.port=8085

spring.datasource.url=jdbc:mysql://192.168.1.101:3307/Tacit?characterEncoding=UTF8&autoReconnect=true&serverTimezone=Asia/Shanghai&allowMultiQueries=true
spring.datasource.username=root
spring.datasource.password=123456
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

记得修改里面的端口和数据库结构

如果报错可能是用了mybatis但没有在application.properties里添加代码:

mybatis.mapper-locations=classpath:/mapper/**/*.xml