YML的ConfigurationProperties加载列表

问题描述

我正在尝试从YML加载配置.如果这些是逗号分隔的值，则可以加载值，也可以加载列表.但是我无法加载典型的YML列表.

I'm trying to load Configuration from YML. I can load value and I can also load list if these are comma seperated values. But i can't load a typical YML List.

配置类

@Component
@PropertySource("classpath:routing.yml")
@ConfigurationProperties
class RoutingProperties(){
    var angular = listOf("nothing")
    var value: String = ""
}

正在工作的路由.yml

angular: /init, /home
value: Hello World

不起作用routing.yml

angular:
    - init
    - home

value: Hello World

为什么我不能加载yml的第二个版本/我有语法错误?

Why can't i load the second version of yml / do I have a syntaxt error?

ENV:Kotlin，春季2.0.0.M3

ENV: Kotlin, Spring 2.0.0.M3

推荐答案

正如@flyx所说，@PropetySource不适用于yaml文件.但是在春季，您可能会覆盖几乎所有内容:)

As @flyx say, @PropetySource not worked with yaml files. But in spring you may override almost everything :)

PropertySource具有附加参数:factory.可以基于DefaultPropertySourceFactory

PropertySource has additional parameter: factory. It's possible to create your own PropertySourceFactory base on DefaultPropertySourceFactory

open class YamlPropertyLoaderFactory : DefaultPropertySourceFactory() {
    override fun createPropertySource(name: String?, resource: EncodedResource?): org.springframework.core.env.PropertySource<*> {
        if (resource == null)
            return super.createPropertySource(name, resource)

        return YamlPropertySourceLoader().load(resource.resource.filename, resource.resource, null)
    }
}

并且在propertysource批注中使用此工厂时:

And when use this factory in propertysource annotation:

@PropertySource("classpath:/routing.yml", factory = YamlPropertyLoaderFactory::class)

最后，您需要使用mutableList初始化变量angular

Last that you need is to initialized variable angular with mutableList

完整代码示例:

@Component
@PropertySource("classpath:/routing.yml", factory = YamlPropertyLoaderFactory::class)
@ConfigurationProperties
open class RoutingProperties {
    var angular = mutableListOf("nothing")
    var value: String = ""


    override fun toString(): String {
        return "RoutingProperties(angular=$angular, value='$value')"
    }
}

open class YamlPropertyLoaderFactory : DefaultPropertySourceFactory() {
    override fun createPropertySource(name: String?, resource: EncodedResource?): org.springframework.core.env.PropertySource<*> {
        if (resource == null)
            return super.createPropertySource(name, resource)

        return YamlPropertySourceLoader().load(resource.resource.filename, resource.resource, null)
    }
}

@SpringBootApplication
@EnableAutoConfiguration(exclude = arrayOf(DataSourceAutoConfiguration::class))
open class Application {
    companion object {
        @JvmStatic
        fun main(args: Array<String>) {
            val context = SpringApplication.run(Application::class.java, *args)

            val bean = context.getBean(RoutingProperties::class.java)

            println(bean)
        }
    }
} 

这篇关于YML的ConfigurationProperties加载列表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！