spring boot整合mybatis-plus启动报错问题及解答.pdf
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2020-08-04
20:19:25
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ErrorstartingApplicationContext.Todisplaytheconditionsreportre-runyour
applicationwith'debug'enabled.
2020-08-0419:58:14.209ERROR1432---[main]o.s.boot.SpringApplication
:Applicationrunfailed
org.springframework.beans.factory.UnsatisfiedDependencyException:Errorcreating
beanwithname'userController':Unsatisfieddependencyexpressedthroughfield
'userServiceImpl';nestedexceptionis
org.springframework.beans.factory.UnsatisfiedDependencyException:Errorcreating
beanwithname'userServiceImpl':Unsatisfieddependencyexpressedthroughfield
'baseMapper';nestedexceptionis
org.springframework.beans.factory.NoSuchBeanDefinitionException:Noqualifying
beanoftype'com.jerry.conquer.mapper.UserMapper'available:expectedatleast1
beanwhichqualifiesasautowirecandidate.Dependencyannotations:
出现如上问题大多数人第一可能想到的是依赖冲突，然后
疯狂百度各种问题出来，一顿加依赖和改依赖；其实这是
springboot启动进行包扫描时，不能扫描到Mapper包导
致的启动报错。
解决方案有两种：
第一种：在启动类上加注解
@MapperScan("xx.xx.xx.mapper")
@MapperScans({"xx.xx.xx.mapper","xx.xx.xx.mapper"})
第二种：在每一个Mapper接口上加@Mapper注解
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