Spring bean容器命令是否消除了重复的容器？
Spring bean容器的命令是否消除了重复的容器？ 例如，如果bean容器文件A导入B和C并且每个都导入D，Spring是否会消除或忽略重复的D容器？
它不会消除重复的“容器”，但它将消除重复的bean定义。 所以D中的bean只会在生成的bean工厂中创建一次。 不过，你会得到一张充满警告的脸。
这是最好避免的事情。 一个与另一个具有相同ID的bean定义将“隐藏”该bean定义，无论该bean的类型和属性是否相同。 哪一个“隐藏”取决于声明顺序。 这很危险，所以Spring会警告你。
我在GitHub上创建了示例项目spring-context-import来确认skaffman的答案 ：
$ mvn test . . . ------------------------------------------------------- TESTS ------------------------------------------------------- Running ca.derekmahar.example.springContextImport.SpringContextImportTest 2011-03-15 16:25:44,980 545 [main] INFO o.springframework.test.context.TestContextManager - @TestExecutionListeners is not present for class [class ca.derekmahar.example.springContextImport.SpringContextImportTest]: using defaults. 2011-03-15 16:25:45,240 805 [main] INFO osbeans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring-application-context.xml] 2011-03-15 16:25:45,417 982 [main] INFO osbeans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring-application-context-a.xml] 2011-03-15 16:25:45,459 1024 [main] INFO osbeans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring-application-context-b.xml] 2011-03-15 16:25:45,484 1049 [main] INFO osbeans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring-application-context-d.xml] 2011-03-15 16:25:45,551 1116 [main] INFO osbeans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring-application-context-c.xml] 2011-03-15 16:25:45,585 1150 [main] INFO osbeans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [spring-application-context-d.xml] 2011-03-15 16:25:45,610 1175 [main] INFO osbfactory.support.DefaultListableBeanFactory - Overriding bean definition for bean 'd': replacing [Generic bean: class [ca.derekmahar.example.springContextImport.bean.D]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null; defined in class path resource [spring-application-context-d.xml]] with [Generic bean: class [ca.derekmahar.example.springContextImport.bean.D]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null; defined in class path resource [spring-application-context-d.xml]] 2011-03-15 16:25:45,652 1217 [main] INFO oscontext.support.GenericApplicationContext - Refreshing org.springframework.context.support.GenericApplicationContext@105738: startup date [Tue Mar 15 16:25:45 EDT 2011]; root of context hierarchy 2011-03-15 16:25:45,895 1460 [main] INFO osbfactory.support.DefaultListableBeanFactory - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@18825b3: defining beans [d,b,c,a,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor]; root of factory hierarchy 2011-03-15 16:25:45,895 1460 [main] INFO ca.derekmahar.example.springContextImport.bean.C - Created D 2011-03-15 16:25:45,979 1544 [main] INFO ca.derekmahar.example.springContextImport.bean.B - Created B 2011-03-15 16:25:45,996 1561 [main] INFO ca.derekmahar.example.springContextImport.bean.C - Created C 2011-03-15 16:25:46,005 1570 [main] INFO ca.derekmahar.example.springContextImport.bean.A - Created A 2011-03-15 16:25:46,038 1603 [main] INFO ca.derekmahar.example.springContextImport.bean.A - Running A 2011-03-15 16:25:46,038 1603 [main] INFO ca.derekmahar.example.springContextImport.bean.B - Running B 2011-03-15 16:25:46,038 1603 [main] INFO ca.derekmahar.example.springContextImport.bean.C - Running D 2011-03-15 16:25:46,038 1603 [main] INFO ca.derekmahar.example.springContextImport.bean.C - Running C 2011-03-15 16:25:46,038 1603 [main] INFO ca.derekmahar.example.springContextImport.bean.C - Running D Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.846 sec
正如skaffman预测的那样，请注意标记重复bean“d”的“覆盖bean’的’overbin bean”’消息。