Spring 嵌套 ConfigurationProperties 和 Kotlin

Question

我想在 Spring Boot 中使用嵌套的 ConfigurationProperties，它在 java 中有效，但在 kotlin 中無效。 我的應用程序屬性中有以下幾行：

cert.signing-cert.filePath=truststore.jks
cert.signing-cert.password=xxxx
cert.private-signing.filePath=sign_test.p12
cert.private-signing.password=xxxx
cert.private-encrpytion.filePath=encryption_test.p12
cert.private-encrpytion.password=xxx

我創建了這個結構來處理這些屬性：

@Component
@ConfigurationProperties("cert")
class CertConfig {
    lateinit var signingCert: SigningCert
    lateinit var privateSigning: PrivateSigning
    lateinit var privateEncrpytion: PrivateEncrpytion

    class SigningCert {
        lateinit var filePath: String
        lateinit var password: String
    }

    class PrivateSigning {
        lateinit var filePath: String
        lateinit var password: String
    }

    class PrivateEncrpytion {
        lateinit var filePath: String
        lateinit var password: String
    }
}

我在kapt添加了kapt插件和依賴build.gradle.kts

    kotlin("kapt") version "1.3.50"
...
    kapt("org.springframework.boot:spring-boot-configuration-processor")
    implementation("org.springframework.boot:spring-boot-configuration-processor")

當我運行這段代碼時，我得到了這個異常：

Caused by: kotlin.UninitializedPropertyAccessException: lateinit property signingCert has not been initialized

Answer 1

我忘了初始化屬性。

 var signingCert: SigningCert = SigningCert()
 var privateSigning: PrivateSigning = PrivateSigning()
 var privateEncrpytion: PrivateEncrpytion = PrivateEncrpytion()