我有一个 Kotlin 数据类,我想从application.yml
文件中读取属性。这是我的数据类:
@ConstructorBinding
@ConfigurationProperties("meanwhile.in.hell.myapp")
data class MyAppProperties(val serverId: String, val locationId: String)
然后我将它添加到我的配置类中:
@Configuration
@EnableConfigurationProperties(MyAppProperties::class)
open class MyAppConfiguration(private val properties: MyAppProperties) {
我使用 just 访问值properties.serverId
并将对象传递给正在创建的其他 bean 的构造函数,例如这个:
open class MyAppClient(
private val webClient: WebClient,
private val properties: MyAppProperties
) : IMyAppClient {
但是,当我启动我的应用程序时,我收到一个错误,它没有尝试从 加载属性application.yml
,而是尝试为构造函数参数查找 bean:
Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'meanwhile.in.hell.myapp-meanwhile.in.hell.myapp.MyAppProperties': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'java.lang.String' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
Parameter 0 of constructor in meanwhile.in.hell.myapp.MyAppProperties required a bean of type 'java.lang.String' that could not be found.
我如何阻止我的应用程序认为这些参数是自动装配的?我知道在 Kotlin 中,这就是构造函数 Autowired bean 的样子(即,不需要注释),但是我在网上看到的所有关于如何读取application.yml
属性的示例看起来都与我的数据类相同。
Spring-Boot v2.3.0.RELEASE Kotlin v1.3.72