springboot 项目中不同包下有相同的文件报错

╰半橙微兮° 2022-12-21 00:50 143阅读 0赞

错误信息展示：

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [com.sgit.smartsite.quality.QualityApplication]; nested exception is org.springframework.context.annotation.ConflictingBeanDefinitionException: Annotation-specified bean name 'qmMaterialPartyASupplyController' for bean class [com.sgit.smartsite.quality.web.controller.qm.QmMaterialPartyASupplyController] conflicts with existing, non-compatible bean definition of same name and class [com.sgit.smartsite.quality.app.controller.qm.QmMaterialPartyASupplyController]
    	at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:184) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:316) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:233) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:273) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:93) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:694) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:532) ~[spring-context-5.0.7.RELEASE.jar:5.0.7.RELEASE]
    	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    	at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) ~[spring-boot-2.0.3.RELEASE.jar:2.0.3.RELEASE]
    	at com.sgit.smartsite.quality.QualityApplication.main(QualityApplication.java:26) [classes/:na]

通过查看Spring源码得知，当我们使用注解创建bean时，spring使用了AnnotationBeanNameGenerator来创建bean的名称。  
解决方案：自己写一个Generator吧。如下：

@SpringBootApplication
    @ComponentScan(basePackages = {"com.sgit.smartsite.quality", "com.sgit.smartsite.quality.*.controller","com.sgit.smartsite.*.client"}, nameGenerator = QualityApplication.MultidataApplication.class)
    //启用feign进行远程调用
    @EnableFeignClients(basePackages = {"com.sgit.smartsite.*.feign"})
    @MapperScan(basePackages = "com.sgit.smartsite.quality.*.*.mapper", nameGenerator = QualityApplication.MultidataApplication.class)
    public class QualityApplication {
    
        public static class MultidataApplication extends AnnotationBeanNameGenerator {
            @Override
            protected String buildDefaultBeanName(BeanDefinition definition) {
                return definition.getBeanClassName();
            }
        }
        public static void main(String[] args) {
            SpringApplication springApplication = new SpringApplication(QualityApplication.class);
            springApplication.run(args);
        }
    }

Mybatis的MapperScan里新增：

nameGenerator = QualityApplication.MultidataApplication.class

同理 spring注入的其他组件 如controller、service、repository 等 都需要加入 即在@ComponentScan 参数里面也加入nameGenerator的值