Java--Action: Consider defining a bean of type ‘com.XX.dao.XXDao‘ in your configuration

启动 SpringBoot项目报错：

***************************
APPLICATION FAILED TO START
***************************Description:Field adminRoleRelationDao in com.macro.mall.tiny.service.impl.UmsAdminServiceImpl required a bean of type 'com.macro.mall.tiny.dao.UmsAdminRoleRelationDao' that could not be found.The injection point has the following annotations:- @org.springframework.beans.factory.annotation.Autowired(required=true)Action:Consider defining a bean of type 'com.macro.mall.tiny.dao.UmsAdminRoleRelationDao' in your configuration.

报错原因：

项目未扫描到 dao 包

解决办法：

在主启动类上加上：@ComponentScan(basePackages = {“com.XX.dao”}) 你的项目的dao层包路径，如下：

@ComponentScan(basePackages = {"com.xx.dao"})//引入dao根路径
//@MapperScan("com.macro.mall.tiny.mbg.mapper")
@SpringBootApplication
public class MallApplication {public static void main(String[] args) {SpringApplication.run(MallApplication.class, args);}
}