How to autowire @ConfigurationProperties into @Configuration?

Question

I have a properties class defined like this:

@Validated
@ConfigurationProperties(prefix = \"plugin.httpclient\")
public class HttpClientProperties {
   ...
}         


        

Answer 1

This is a valid use case, however, your HttpClientProperties are not picked up because they're not scanned by the component scanner. You could annotate your HttpClientProperties with @Component:

@Validated
@Component
@ConfigurationProperties(prefix = "plugin.httpclient")
public class HttpClientProperties {
    // ...
}

Another way of doing so (as mentioned by Stephane Nicoll) is by using the @EnableConfigurationProperties() annotation on a Spring configuration class, for example:

@EnableConfigurationProperties(HttpClientProperties.class) // This is the recommended way
@EnableScheduling
public class HttpClientConfiguration {
    // ...
}

This is also described in the Spring boot docs.