YML的ConfigurationProperties加载列表

Question

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。

配置类别

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

工作routing.yml

angular: /init, /home
value: Hello World

无法正常工作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？

ENV：Kotlin，春季2.0.0.M3

Answer 1

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

PropertySource有附加参数：factory。可以基于DefaultPropertySourceFactory创建自己的PropertySourceFactory

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)
    }
}

并在propertysource批注中使用此工厂时：

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

最后，您需要使用mutableList初始化变量angular

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)
        }
    }
}