不多说,直接上排查方法:

步骤
1、pom 引入 依赖
mybatis-spring-boot-starter

2、启动类中 注解扫描mapper接口
@MapperScan(basePackages = "com.xxx.mapper")

3、配置文件application.properties中介入xml地址
mybatis.mapper-locations=classpath:mapper/*.xml

解决springboot——集成 mybatis遇到的问题：No MyBatis mapper was found in '[com.example.demo]' package...