是春天getbean案件是否传染? [英] Is spring getbean case sentitive or not?
问题描述
当我使用 getBean(test)
我有一个像
@Component
public class TEST {
}
可以加载这个bean吗?
can this bean be loaded?
推荐答案
getBean()
区分大小写,但是Spring对 @Component
和 @Bean
类。请参见 4.10.5命名自动检测组件 :
getBean()
is case sensitive, however Spring uses custom bean naming strategy for @Component
and @Bean
classes. See 4.10.5 Naming autodetected components:
在扫描过程中自动检测组件时,它的bean名称由
BeanNameGenerator
策略[...]生成。默认情况下,任何Spring构造型注释(@Component
,@Repository
,@Service
和@Controller
)包含name
值,从而将该名称提供给相应的bean定义。
When a component is autodetected as part of the scanning process, its bean name is generated by the
BeanNameGenerator
strategy [...]. By default, any Spring stereotype annotation (@Component
,@Repository
,@Service
, and@Controller
) that contains aname
value will thereby provide that name to the corresponding bean definition.
如果此类注释不包含 name
值或任何其他检测到的组件(例如由自定义过滤器),默认bean名称生成器返回非大写的非限定类名称。
If such an annotation contains no name
value or for any other detected component (such as those discovered by custom filters), the default bean name generator returns the uncapitalized non-qualified class name.
对于 @Configuration
/ @Bean
参见 4.12.4.5自定义bean命名 :
And for @Configuration
/@Bean
see 4.12.4.5 Customizing bean naming:
默认情况下,配置类使用
@Bean
方法的名称作为结果bean的名称。但是,可以使用name
属性覆盖此功能。
By default, configuration classes use a
@Bean
method's name as the name of the resulting bean. This functionality can be overridden, however, with thename
attribute.
返回你的问题。因为你的类没有遵循Java命名约定(驼峰式名称),所以Spring使用不寻常的名称,这将起作用:
Back to your question. Because your class is not following Java naming conventions (camel-case names) Spring uses unusual name for the bean, this will work:
getBean("TEST")
但是如果使用预期的命名( @组件类Test {}
),必须使用小写标识符:
However if you use expected naming (@Component class Test { }
), you must use lower-case identifiers:
getBean("test")
此外,如果您的名字更复杂,则应用非大写的驼峰式语法(继续引用 Spring文档):
Moreover if your name is more complex, uncapitalized camel-case syntax applies (continuing to quote the Spring documentation):
[...]例如,如果检测到以下两个组件,则名称将为
myMovieLister
和movieFinderImpl
:
@Service("myMovieLister")
public class SimpleMovieLister {
// ...
}
@Repository
public class MovieFinderImpl implements MovieFinder {
// ...
}
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