错误原图：  解决方案   将这段注解后面半段删除，即： 错误就解决了 可以正常运行

【报错】： No qualifying bean of type ‘com.example.xxx.mapper.ProductMapper’ available: expected at least 1 bean which qualifies as autowire candidate. 方法一：在mapper里面加上@Mapper 方法二：在启动类里面加上mapper包的扫描路径