java Spring MVC 中的@Service 是什么
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What is @Service in Spring MVC
提问by kosmoplan
If I use @Serviceon a service class, do I need to make a service class bean in my servlet xml file or do I have to do both?
如果我@Service在服务类上使用，我是否需要在我的 servlet xml 文件中创建一个服务类 bean 或者我必须两者都做？
回答by kosmoplan
You don't have to declare a bean in your context file if you:
如果您符合以下条件，则不必在上下文文件中声明 bean：
1) Annotate the class with:
1) 使用以下注释对类进行注释：
@Component, @Service, @Controller or @Repository
2) Include the context:component-scan element in your context file like this:
2) 在您的上下文文件中包含 context:component-scan 元素，如下所示：
<context:component-scan base-package="your.package" />
Hope that helps.
希望有帮助。
回答by serg10
Last time I looked (Spring 2.5) @Servicewas a marker annotation subclassed from @Component, but with no additional behaviour. Which means that beans tagged with @Servicebecome candidates for auto detection if you are using annotation-based configuration via classpath scanning.
上次我看 (Spring 2.5) @Service是一个标记注释，从@Component子类化，但没有额外的行为。这意味着，如果您通过类路径扫描使用基于注释的配置，则标记为@Service 的bean 将成为自动检测的候选对象。
As per the docs, the intention is that this annotation might include service layer specific functionality in future Spring releases. It can also act as an AOP point cut for all of your service layer components.
根据docs，目的是此注释可能包含未来 Spring 版本中的服务层特定功能。它还可以充当所有服务层组件的 AOP 切入点。
