Kotlin

Question

@Component
open class AmazonDynamoDBAsyncClientProvider @Autowired constructor(val dynamoDBConfiguration: DynamoDBConfig){

@Bean open fun getAmazonDBAsync() = AmazonDynamoDBAsyncClientBuilder.standard()
        .withEndpointConfiguration(
                AwsClientBuilder.EndpointConfiguration(dynamoDBConfiguration.endpoint, dynamoDBConfiguration.prefix))
        .build()
}

下面是我试图用配置autowire的kotlin bean

@Component
@ConfigurationProperties(value = "dynamo")
open class DynamoDBConfig(var endpoint: String="", var prefix: String="")

最后，这是一个常规java bean，它确实用configurationproperties填充，但是当它得到autowired时，我看到这些属性是空的/null

@Component
@ConfigurationProperties("dynamo")
public class DynamoDBConfiguration {
private String endpoint;
private String tablePrefix;

public String getEndpoint() {
    return endpoint;
}

public void setEndpoint(String endpoint) {
    this.endpoint = endpoint;
}

public String getTablePrefix() {
    return tablePrefix;
}

public void setTablePrefix(String tablePrefix) {
    this.tablePrefix = tablePrefix;
}
}

Answer 1

您是否尝试过删除ConfigurationProperties类上的@Component注释？

以下是我对Kotlin和Spring所做的，希望能有所帮助。

我试图利用kotlin-spring和kotlin-allopen gradle插件

dependencies {
    classpath "org.jetbrains.kotlin:kotlin-noarg:$kotlinVersion"
    classpath "org.jetbrains.kotlin:kotlin-allopen:$kotlinVersion"
}
apply plugin: 'kotlin-spring'
apply plugin: 'kotlin-noarg'
noArg {
    annotation("your.noarg.annotation.package.NoArg")
}

@ConfigurationProperties("dynamo")
@NoArg
data class DynamoDBConfiguration(var endpoint: String, var prefix: String)