SpringBoot整合Mybatis-Plus自動裝配@Autowired失效問題

最近在使用springboot整合mybatis-plus時遇到@Autowired失效問題,致使容器沒法啓動html

項目結構以下:spring

 啓動類LsTestApplication:express

控制器UserController:springboot

實現類UserServiceImpl:mybatis

UserMapper:app

 

 啓動以後一直報錯,報錯信息以下:ide

2019-08-23 17:16:16.457  WARN 8528 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'userService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userServiceImpl': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.sand.demo.mapper.UserMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}工具

猜想:開發工具

  一、多是組件沒掃描到,相應的組件未加註解ui

  二、啓動類不在掃描包的根目錄下也會致使bean註冊失敗

  使用IDEA開發工具查看組件是有的,因此以上兩種可能都排除了

   

   那就只剩下一種可能了,架包引用錯了,查看pom文件發現引用的是mybatis-plus依賴,

  

  根據提供的文檔https://mp.baomidou.com/guide/install.html#release,springboot項目應該引用mybatis-plus-boot-starter這個依賴

  

  而後記得將mapper掃描路徑加上,問題就解決了

  

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