SpringBoot中service注入失敗(A component required a bean of type 'XXService' that could not found)
="com.example.demo.mapper") 2.該service對應的dao接口上沒寫@Mapper 我 ...
原文：SpringBoot中Dao或者Service注入失敗（A component required a bean of type 'XXService' that could）
不要使用 Component注解，使用 Mapper接口，使用后可能在接口引用的時候編譯報紅色，直接忽略 ...
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