筛选@ComponentScan特定的软件包 [英] Filter specific packages in @ComponentScan

问题描述

我想从基础，以基于Java配置在Spring XML转换。现在，我们有这样的事情在我们的应用程序上下文：

I want to switch from XML based to Java based configuration in Spring. Now we have something like this in our application context:

<context:component-scan base-package="foo.bar">
    <context:exclude-filter type="annotation" expression="o.s.s.Service"/>
</context:component-scan>
<context:component-scan base-package="foo.baz" />

但如果我写这样的事情...

But if I write something like this...

 @ComponentScan(
    basePackages = {"foo.bar", "foo.baz"},
    excludeFilters = @ComponentScan.Filter(
       value= Service.class, 
       type = FilterType.ANNOTATION
    )
 )

...这将排除的两个套​​餐服务。我有我忽视的东西令人尴尬的琐碎强烈的感觉，但我无法找到一个解决方案，以过滤器的范围限制在 foo.bar 。

... it will exclude services from both packages. I have the strong feeling I'm overlooking something embarrassingly trivial, but I couldn't find a solution to limit the scope of the filter to foo.bar.

推荐答案

您只需要创建两个配置类，两个 @ComponentScan ，你需要标注。

You simply need to create two Config classes, for the two @ComponentScan annotations that you require.

因此​​，例如，你必须为你的 foo.bar 包中的一个配置类：

So for example you would have one Config class for your foo.bar package:

@Configuration
@ComponentScan(basePackages = {"foo.bar"}, 
    excludeFilters = @ComponentScan.Filter(value = Service.class, type = FilterType.ANNOTATION)
)
public class FooBarConfig {
}

然后是第二个配置类的<​​code> foo.baz 包：

@Configuration
@ComponentScan(basePackages = {"foo.baz"})
public class FooBazConfig {
}

然后实例化Spring上下文的时候，你会做到以下几点：

then when instantiating the Spring context you would do the following:

new AnnotationConfigApplicationContext(FooBarConfig.class, FooBazConfig.class);

另一种方法是，你可以使用第一个配置 @ org.springframework.context.annotation.Import 注释C>类导入第二配置类。因此，例如，你可以改变 FooBarConfig 是：

An alternative is that you can use the @org.springframework.context.annotation.Import annotation on the first Config class to import the 2nd Config class. So for example you could change FooBarConfig to be:

@Configuration
@ComponentScan(basePackages = {"foo.bar"}, 
    excludeFilters = @ComponentScan.Filter(value = Service.class, type = FilterType.ANNOTATION)
)
@Import(FooBazConfig.class)
public class FooBarConfig {
}

，那么只需在开始使用环境：

Then you would simply start your context with:

new AnnotationConfigApplicationContext(FooBarConfig.class)

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