Spring-boot: set default value to configurable properties

Question

I have a properties class below in my spring-boot project.

@Component
@ConfigurationProperties(prefix = \"myprefix\")
public class MyProperties {
    private Str         


        

Answer 1

Check if property1 was set using a @PostContruct in your MyProperties class. If it wasn't you can assign it to another property.

@PostConstruct
    public void init() {
        if(property1==null) {
            property1 = //whatever you want
        }
    }

Answer 2

In spring-boot 1.5.10 (and possibly earlier) setting a default value works as-per your suggested way. Example:

@Component
@ConfigurationProperties(prefix = "myprefix")
public class MyProperties {

  @Value("${spring.application.name}")
  protected String appName;
}

The @Value default is only used if not overridden in your own property file.