如何在Spring中使用正则表达式集合过滤bean集合? [英] How to filter a collection of beans using a collection of regex in Spring?

问题描述

我想在注释模式下使用Spring自动装配一个bean集合.我已经尝试过类似下面的内容...

I want to autowire a collection of beans using Spring in annotaion mode. I've tried this something like the below ...

@Configuration
@ComponentScan(basePackages = "mypkg", 
    includeFilters = @Filter(type = FilterType.REGEX, pattern = {"regex1", "regex2"}), 
    excludeFilters = @Filter(type = FilterType.REGEX, pattern = "regex3"))
public class BeanCollector {

    @Autowired
    private List<MyBean> myBeans;

    @Bean(name = "beans")
    public List<MyBean> getMyBeans() {
        return myBeans;
    }
}

此代码可以很好地运行，但是问题是在我的应用程序的真实世界中. regexes是在运行时生成的，因此我不能像上面的代码那样对它们进行硬编码.我使用了带有静态方法的类，该方法返回了这样的String数组...

This code works pretty well, but the problem is that in real world of my app. the regexes are generated in runtime, so I can't hardcode them as the code above. I used a class with a static method returning a String array like this ...

includeFilters = @Filter(type = FilterType.REGEX, pattern = Regexes.getIncludeRegexes())

但是它带来了编译错误.我认为应该有一个解决方案，但是尽管深入研究，我还是找不到任何解决办法.

But it brings compile error. I think it ought to have a solution but in spite of a deep googling I couldn't find any.

有什么建议吗?

推荐答案

如果我对您的理解正确，那么您希望动态选择一些与MyBean类/接口匹配的可用Bean.最好的方法是在执行上述操作时注入Collection<MyBean>，然后遍历集合，并根据您的条件进行选择. Groovy闭包，Google Guava或Java 8 lambda可以使该过程更易于编写.

If I understand you correctly, you're wanting to dynamically select some set of the available beans that match the MyBean class/interface. The best way to do that is to inject a Collection<MyBean> as you're doing above and then iterate over the collection, selecting according to your criteria. Groovy closures, Google Guava, or Java 8 lambdas can make that process simpler to write.

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