使用注解创建时，bean 是如何默认命名的? [英] How are beans named by default when created with annotation?

问题描述

我正在使用其他人编写的 Spring Java 代码.我想引用一个由注释创建的 bean(字段 classABC):

I am working with Spring java code written by someone else. I want to reference a bean that's created by annotation (of field classABC):

@Component
public class ClassService
{
    @Autowired
    ClassABC classABC;

public interface ClassABC

@Repository
public class ClassABCImpl extends BaseABC implements ClassABC

以下代码尝试通过名称获取对 ClassABC bean 的引用，但不起作用:

The following code tries to get a reference to the ClassABC bean by name, but does not work:

ClassABC classABC = ApplicationContext.getBean("classABC");

但是，以下按类型引用此 bean 的代码确实有效:

However, the following code that references this bean by type does work:

ClassABC classABC = ApplicationContext.getBean(ClassABC.class);

因为第一个引用不起作用，我猜测这个bean没有命名为classABC".这个豆子叫什么名字?

Because the first reference does not work, I am guessing that the bean is not named "classABC". What is the name of this bean?

注意:没有配置xml引用这个bean，所以我认为xml中没有定义bean名称.

Note: there is no configuration xml that references this bean, so I don't think the bean name is defined in xml.

推荐答案

https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/context/annotation/AnnotationBeanNameGenerator.html

是注解的默认 bean 名称生成器，对于 @Bean

Is the default bean name generator for annotations, there's a DefaultBeanNameGenerator for beans defined by @Bean

在这种情况下，我相信 bean 的名称将是 classABCImpl，因为它是由类的短名称构建的.

In this case I believe the name of the bean would be classABCImpl, as its built of the short name of the class.

从一个具体的服务实现的例子来看，com.xyz.FooServiceImpl ->fooServiceImpl

From the example of a concrete service implementation, com.xyz.FooServiceImpl -> fooServiceImpl

我个人不喜欢使用默认命名，如果您想通过名称引用该 bean.在这些情况下最好是明确的.

Personally I'm not a fan of using the default naming if you are ever going to want to refer to that bean via the name. Better to be explicit in these cases.

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