Springboot - @ConfigurationProperties 不填充类字段

Question

I know similar questions have been asked many times with different variations. I have tried to learn from them and from the available tutorials and try to get it working but I think I am missing something that I am not able to figure out.

I want to load a configuration from the external yaml file admin-config.yml , and not the default application.yml in my case.

This is what I have done so far.

1. Annotated the Application file with @EnableConfigurationProperties

@SpringBootApplication
@EnableConfigurationProperties
public class MyServer {

    public static void main(String[] args) {
        SpringApplication.run(MyServer.class, args);
    }
}

2. The AdminConfig component class:

@Component
@PropertySource("classpath:admin-config.yml")
@ConfigurationProperties(prefix = "admin-config")
public class AdminConfig {

    private List<PrimeModerator> primeModerators;

    @PostConstruct
    public void init() {
        System.out.println(primeModerators);    // this is null
    }

    public void setPrimeModerators(List<PrimeModerator> primeModerators) {
        this.primeModerators = primeModerators;
    }

    public List<PrimeModerator> getPrimeModerators() {
        return primeModerators;
    }
}

3. The PrimeModerator class

@Data
public class PrimeModerator implements Serializable {
    private long id;
    private String name;
    private List<String> roles;
    private String details;
    private Date created;
}

4. The admin-config.yml .

admin-config:
  primeModerators:
    - !!com.mydomain.model.PrimeModerator
      id: 1
      name: Pawan
      roles: [super-admin]

    - !!com.mydomain.model.PrimeModerator
      id: 2
      name: Prashant
      roles: [admin, moderator]

I have created a unit test case which always fails (which should not).

@SpringBootTest
@RunWith(SpringRunner.class)
public class AdminConfigTest {

    @Autowired
    private AdminConfig adminConfig;

    @Test
    public void testAdminConfig() {
        assertNotNull(adminConfig.getPrimeModerators());    // this fails
    }
}

I am not sure what I am missing here. Using springboot version 2.2.1.RELEASE with jdk8.

Thanks for your answers in advance!

Answer 1

from this documentation : Baeldung - Spring

It says : " The Hibernate Validation framework uses standard Java bean getters and setters, so it's important that we declare getters and setters for each of the properties. "

Could you please test by adding getters/settest in PrimeModerator ? Did you try with a single simple String value before you nested array ? Good luck...

A github sample on Baeldung in the bottom of page