spring boot 集成mybatis报错

Posted 2020-10-12 薛定谔的猫！

Caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [so.dian.dev.device.interfaces.IDeviceInfoSV] is defined: expected single matching bean but found 2: deviceInfoSVImpl,IDeviceInfoSV

at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1126)

at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014)

at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545)

... 19 more

 

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首先说下我的工程结构：controller——>manager——>sv——>dao

可以看出上面的异常是因为mybatis的自动扫描扫到了sv层的接口，mybatis会拿这个sv接口与mapper去匹配，而mapper里配置的都是dao层的

<mapper namespace="so.dian.dev.dao.device.IDeviceInfoDAO">

 

所以当然找不到了。解决的办法就是不让他扫到sv层的接口，使用@MapperScan("so.dian.dev.dao") 这个注解

 

 

@SpringBootApplication

@PropertySource({"variables.properties","resource.local.properties"})

@MapperScan("so.dian.dev.dao")

@EnableCaching

public class Application extends SpringBootServletInitializer{