SpringBoot整合Mybatis-Plus自动装配@Autowired失效问题
最近在使用springboot整合mybatis-plus时遇到@Autowired失效问题,导致容器无法启动
项目结构如下:
启动类LsTestApplication:
控制器UserController:
实现类UserServiceImpl:
UserMapper:
启动之后一直报错,报错信息如下:
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)}
猜测:
1、可能是组件没扫描到,相应的组件未加注解
2、启动类不在扫描包的根目录下也会导致bean注册失败
使用IDEA开发工具查看组件是有的,所以以上两种可能都排除了
那就只剩下一种可能了,架包引用错了,查看pom文件发现引用的是mybatis-plus依赖,
根据提供的文档https://mp.baomidou.com/guide/install.html#release,springboot项目应该引用mybatis-plus-boot-starter这个依赖
然后记得将mapper扫描路径加上,问题就解决了