项目中，两个模块中都放了 Mapper，如下所示
@MapperScan(basePackages ={"com.vipsoft.his.mapper","com.vipsoft.his.sdfyy.mapper"} )
为了方便，两个合成了一个，
@MapperScan(basePackages ={"com.vipsoft.his"} )
问题来了
*************************** APPLICATION FAILED TO START *************************** Description: Field fromHisApi in com.vipsoft.his.web.controller.CustodyController required a single bean, but 2 were found: - fromHisApiImpl: defined in file [D:\Projects\80.HIS\Test\Master\vipsoft-his-sdfyy\target\classes\com\vipsoft\his\sdfyy\service\impl\FromHisApiImpl.class] - IFromHisApi: defined in file [D:\Projects\80.HIS\Test\Master\vipsoft-his-api\target\classes\com\vipsoft\his\api\IFromHisApi.class] Action: Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed
解决办法【不好】：在实现类上增加 @Primary，或者在调用的地方加上 @Qualifier("fromHisApiImpl")
Mybatis MapperScan basePackages
原文：https://www.cnblogs.com/vipsoft/p/15035802.html