Is it possible to get variables from a properties file (ex: application.properties) in a tasklet ?

This is my example :

@Component
@PropertySource("classpath:application-${spring.profiles.active}.properties")
public class MyTasklet implements Tasklet {

private static final Logger log = LoggerFactory.getLogger(MyTasklet.class);

@Value("${spring.datasource.username}")
String db_username;

 @Override
    public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {

log.info("db_username : " + db_username);
…
}

My log return null for db_username.

Regards.