database:
  driver: path
  username: username1
  password: password1
  url: jdbc:mariadb://xxx.xxx.xx.xx:xxxx/my_database

@Configuration
@EnableConfigurationProperties
@ConfigurationProperties(prefix = "database")
public class DatabaseConfig {

    @NotNull
    private String _driver;
    @NotNull
    private String _url;
    @NotNull
    private String _username;
    @NotNull
    private String _password;


    @JsonView(DatabaseConfig.class)
    public String getDriver() {
        return _driver;
    }

    public void setDriver(String driver) {
        _driver = driver;
    }

    @JsonView(DatabaseConfig.class)
    public String getUrl() {
        return _url;
    }

    public void setUrl(String url) {
        _url = url;
    }

    @JsonView(DatabaseConfig.class)
    public String getUsername() {
        return _username;
    }

    public void setUsername(String username) {
        _username = username;
    }

    @JsonView(DatabaseConfig.class)
    public String getPassword() {
        return _password;
    }

    public void setPassword(String password) {
        _password = password;
    }
}

@RestController
public class TestController {


   @Autowired private DatabaseConfig _databaseConfig;

   @RequestMapping("/test/databaseConfig.json")
   @JsonView(DatabaseConfig.class)

    public DatabaseConfig databaseConfig() {
        return _databaseConfig;
    }
}

mapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS,     false);