IDEA maven工程spring boot整合mybatis失败

  • Z时代
  • 2024-01-10
  • 分类：IT

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'studentController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.pwq.www.myProject.user.service.StudentService com.pwq.www.myProject.user.controller.StudentController.studentService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'studentService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.pwq.www.myProject.user.mapper.StudentMapper com.pwq.www.myProject.user.service.StudentService.studentMapper; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.pwq.www.myProject.user.mapper.StudentMapper] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:543) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.3.RELEASE.jar:4.2.3.RELEASE]

爆了那么老长的错，大概是我依赖注入的mapper有问题，但是不清楚哪边错了
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mapper.xml
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mapper
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service
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controller
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回答：

你的启动类加上@MapperScan(basePackages = {"mapper类所在的包名"})

mapper类不需要加@Repository注解

回答：

Mapper 类应该加上 @Mapper 而不是 @Repository。

回答：

=============================正确答案==========================================

有2种方式：1.启动类上加@MapperScan(basePackages = {"mapper类所在的包名"})

      2.Mapper 类应该加上 @Mapper 而不是 @Repository。

另外mybatis的配置要注意，.xml的扫描有问题会报Invalid bound statement (not found)错误
.xml文件放到recoures最佳

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