springboot整合druid，项目中有接口后druid配置为空启动报错问题

项目没有创建interface文件的时候启动是正常的，项目中如果新建一个接口文件如图中的IUserService,启动项目报错：

Related cause: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'IUserService' defined in file [E:fqtx-springbootfqtxtargetclassesnetweblooserviceIUserService.class]: Unsatisfied dependency expressed through bean property 'sqlSessionFactory'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'sqlSessionFactory' defined in class path resource [org/mybatis/spring/boot/autoconfigure/MybatisAutoConfiguration.class]: Unsatisfied dependency expressed through method 'sqlSessionFactory' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'druidDataSource' defined in class path resource [net/webloo/utils/config/DruidAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.sql.DataSource]: Factory method 'druidDataSource' threw exception; nested exception is java.lang.IllegalArgumentException: maxActive can't not set zero

也就是说只有项目里存在一个自定义接口文件，获取配置文件就获取不到，这是啥原因

解决方案：

删除 pom.xml里面加的 spring-boot-devtools 这个热部署依赖