![ComponentScan]( "ComponentScan")
本文介绍了从@ComponentScan中排除@Component的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个组件，我想从@ComponentScan中排除一个特别@Configuration：
@Component（foo）class Foo {
...
}
否则，似乎与我的项目中的其他类碰撞。我完全不了解碰撞，但如果我注释了@Component注释，事情就像我想要的那样。但是依靠这个图书馆的其他项目期望这个类由Spring管理，所以我只想在我的项目中跳过。
我尝试使用 @ ComponentScan.Filter ：
@Configuration @EnableSpringConfigured
@ComponentScan（basePackages = {com.example}，excludeFilters = {
@ ComponentScan.Filter（type = FilterType.ASSIGNABLE_TYPE，value = Foo.class）}）
public class MySpringConfiguration {}
但它似乎不起作用。如果我尝试使用 FilterType.ASSIGNABLE_TYPE ，我会收到一个奇怪的错误，无法加载一些看似随机的类：
我还尝试使用 type = FilterType.CUSTOM 如下：
class ExcludeFooFilter implements TypeFilter {
@Override
public boolean match（MetadataReader metadataReader，
MetadataReaderFactory metadataReaderFactory）throws IOException {
return metadataReader.getClass ）== Foo.class;
}
}
@Configuration @EnableSpringConfigured
@ComponentScan（basePackages = {com.example}，excludeFilters = {
@ ComponentScan.Filter （type = FilterType.ASSIGNABLE_TYPE，value = Foo.class）}）
public class MySpringConfiguration {}
如何排除它？
div class =h2_lin>解决方案
配置看起来很好，除了你应该使用 excludeFilters 而不是 / code>：
@Configuration @EnableSpringConfigured
@ComponentScan（basePackages = {com.example }，excludeFilters = {
@ ComponentScan.Filter（type = FilterType.ASSIGNABLE_TYPE，value = Foo.class）}）
public class MySpringConfiguration {}
pre>
I'm a Spring newbie, so please excuse me if the question appears nonsensical.
I have a component that I want to exclude from a @ComponentScan in a particular @Configuration:
@Component("foo") class Foo {
...
}
Otherwise, it seems to clash with some other class in my project. I don't fully understand the collision, but if I comment out the @Component annotation, things work like I want them to. But other projects that rely on this library expect this class to be managed by Spring, so I want to skip it only in my project.
I tried using @ComponentScan.Filter:
@Configuration @EnableSpringConfigured
@ComponentScan(basePackages = {"com.example"}, excludeFilters={
@ComponentScan.Filter(type=FilterType.ASSIGNABLE_TYPE, value=Foo.class)})
public class MySpringConfiguration {}
but it doesn't appear to work. If I try using FilterType.ASSIGNABLE_TYPE, I get a strange error about being unable to load some seemingly random class:
I also tried using type=FilterType.CUSTOM as following:
class ExcludeFooFilter implements TypeFilter {
@Override
public boolean match(MetadataReader metadataReader,
MetadataReaderFactory metadataReaderFactory) throws IOException {
return metadataReader.getClass() == Foo.class;
}
}
@Configuration @EnableSpringConfigured
@ComponentScan(basePackages = {"com.example"}, excludeFilters={
@ComponentScan.Filter(type=FilterType.ASSIGNABLE_TYPE, value=Foo.class)})
public class MySpringConfiguration {}
But that doesn't seem to exclude the component from the scan like I want.
How do I exclude it?
解决方案
The configuration seem alright, except that you should use excludeFilters instead of excludes:
@Configuration @EnableSpringConfigured
@ComponentScan(basePackages = {"com.example"}, excludeFilters={
@ComponentScan.Filter(type=FilterType.ASSIGNABLE_TYPE, value=Foo.class)})
public class MySpringConfiguration {}
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