java 在 <context:component-scan> 中包含子包的语法是什么？
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What syntax for including sub-packages in <context:component-scan>?
提问by Horace
I am using Spring and I have a long list of subpackages, do I have to specify them one by one in the <context:component-scan>tag?
我正在使用Spring，并且我有很长的子包列表，我是否必须在<context:component-scan>标签中一一指定它们？
<context:component-scan base-package="com.fooapp.mainpackage,
com.fooapp.mainpackage.subpackage1,
com.fooapp.mainpackage.subpackage2,
com.fooapp.mainpackage.subpackage3" />
回答by skaffman
Component-scanning supports package hierarchies, so this should work:
组件扫描支持包层次结构，所以这应该可以工作：
<context:component-scan base-package="com.fooapp.mainpackage"/>
This is easy and quicker to verify for yourself - did you try it?
这可以轻松快捷地自行验证 - 您是否尝试过？
回答by danny.lesnik
In addition I would to add that by default, classes annotated with @Component, @Repository, @Service, @Controller, or a custom annotation that itself is annotated with @Component are the only detected candidate components.
此外，我要补充一点，默认情况下，用@Component, @Repository, @Service,注释的类@Controller或本身用 @Component 注释的自定义注释是唯一检测到的候选组件。
You can change this behavior by applying custom filters which are include-filteror exclude-filter
您可以通过应用自定义过滤器来更改此行为，这些过滤器是 include-filter或exclude-filter
For example:
例如：
<context:component-scan base-package="com.vanilla">
<context:exclude-filter
type="annotation"
expression="org.springframework.stereotype.Repository"/>
</context:component-scan>
It will exclude all @Repository annotations.
它将排除所有@Repository 注释。
