1.查看接口实现类是否加入注解，如service、repository等
2.查看spring配置文件是否自动扫描包 <context:component-scan base-package="xxx.xx.xxx">
3.查看是否在web.xml中加载spring容器
4.service是否有实现impl
【异常】expected at least 1 bean which qualifies as autowire candidate for this depende
原文：https://www.cnblogs.com/xiangtunmizu/p/11811367.html