Using @ConfigurationProperties-annotated Types

This style of configuration works particularly well with the SpringApplication external YAML configuration, as shown in the following example:

my:
  service:
    remote-address: 192.168.1.1
    security:
      username: "admin"
      roles:
      - "USER"
      - "ADMIN"

To work with @ConfigurationProperties beans, you can inject them in the same way as any other bean, as shown in the following example:

Java
Kotlin

import org.springframework.stereotype.Service;

@Service
public class MyService {

	private final MyProperties properties;

	public MyService(MyProperties properties) {
		this.properties = properties;
	}

	public void openConnection() {
		Server server = new Server(this.properties.getRemoteAddress());
		server.start();
		// ...
	}

	// ...

}

import org.springframework.stereotype.Service

@Service
class MyService(val properties: MyProperties) {

	fun openConnection() {
		val server = Server(properties.remoteAddress)
		server.start()
		// ...
	}

	// ...

}

Using @ConfigurationProperties also lets you generate metadata files that can be used by IDEs to offer auto-completion for your own keys. See the appendix for details.