不在类路径中使用jar文件时，BeanDefinitionStoreException

Question

将org.springframework.beans.factory.BeanDefinitionStoreException文件夹而不是相应的jar文件放在类路径中时，出现main错误。我将.jar与主文件夹中的类文件进行了比较，并且有相同的文件。这是完整的堆栈跟踪。我更改了程序包名称，因为它是一个内部项目，希望它不会引起混淆：

Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [de.my.app.package.base.AppConfig]; nested exception is org.springframework.context.annotation.ConflictingBeanDefinitionException: Annotation-specified bean name 'DbConfig' for bean class [de.my.app.otherpackage.foo.config.DbConfig] conflicts with existing, non-compatible bean definition of same name and class [de.my.app.otherpackage.foo.config.DbConfig]
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:182)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:321)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:243)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:273)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:98)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:678)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:520)
    at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:84)
    at de.my.app.otherpackage.foo.client.Starter.main(Starter.java:39)
Caused by: org.springframework.context.annotation.ConflictingBeanDefinitionException: Annotation-specified bean name 'DbConfig' for bean class [de.my.app.otherpackage.foo.config.DbConfig] conflicts with existing, non-compatible bean definition of same name and class [de.my.app.otherpackage.foo.config.DbConfig]
    at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.checkCandidate(ClassPathBeanDefinitionScanner.java:320)
    at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:259)
    at org.springframework.context.annotation.ComponentScanAnnotationParser.parse(ComponentScanAnnotationParser.java:137)
    at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:268)
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:232)
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:191)
    at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:272)
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:232)
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:199)
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:168)
    ... 8 more

这是我启动应用程序的方式：

public static void main(String[] args) {
    new AnnotationConfigApplicationContext(AppConfig.class);
}

AppConfig看起来像这样

package de.my.app.package.base;

@Configuration
@ComponentScan({ "de.my.app.package", "de.my.app.otherpackage.foo" })
public class AppConfig {...}

这是DbConfig

package de.my.app.otherpackage.foo.config;

@Configuration
@PropertySource({"classpath:db.properties"})
@EnableJpaRepositories(
    basePackages = "de.my.app.otherpackage.foo.persistence",
    entityManagerFactoryRef = "executionEntityManager",
    transactionManagerRef = "executionTransactionManager"
)
public class DbConfig {}

现在事情是AppConfig在项目A中，DbConfig和main在项目B中。项目B当然具有项目A作为依赖项。运行java -cp /path/to/lib/of/ProjectB时没有错误。但是当我运行java -cp /path/to/build/classes/main时，我得到了错误。