spring boot 多个包启动失败-添加多个包扫描

最新推荐文章于 2023-12-14 20:17:15 发布

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最新推荐文章于 2023-12-14 20:17:15 发布 · 453 阅读

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当Spring Boot项目组织成多个子包时，启动可能会遇到bean初始化失败的问题。通过在启动类中指定扫描的包路径可以解决此问题，如`@ComponentScan(basePackages = {"com.xxx.xx", "com.xxx.yy"})`。然而，这可能导致新添加的mapper实例化失败，报出异常。为解决这个问题，可以在启动类中使用`@MapperScan`注解并指定多个包，如`@MapperScan({"com.xxx.xx.mapper", "com.xxx.yy.mapper"})`。" 84556740,7526502,深度解析Faster R-CNN：从输入到输出的全程剖析,"['计算机视觉', '深度学习', '目标检测', '卷积网络', 'Faster R-CNN']

spring boot 多个包启动失败-添加多个包扫描

表现：启动时提示如下信息：
因为项目需要，将代码结构调整为：

com.xxx
- xx
- yy
- XxxxApplication

这种组织结构，注意，此处时同一个项目（没有拆分成多个maven模块），有多个包保存不同功能模块的代码。此时启动项目，报错如下：

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2019-11-12 19:28:40.563 [recruit_system] [main] ERROR [org.springframework.boot.SpringApplication] -Application startup failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'employeeForPcController': Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'enrollInfoServiceImpl': Unsatisfied dependency expressed through field 'baseMapper'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.xxx.yy.mapper.EnrollInfoMapper' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessPropertyValues(CommonAnnotationBeanPostProcessor.java:321)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543)
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
	at org.springframework.boot.SpringApplication.run(Spri

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