ConversionNotSupportedException

error log

expressed through field ‘expirations’; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert value of type ‘java.lang.String’ to required type ‘java.util.List’; nested exception is java.lang.IllegalStateException:

Cannot convert value of type ‘java.lang.String’ to required type ‘DeviceExpiration’:

no matching editors or conversion strategy found

설정yml

login:
  expirations:
    - device: pc
      limit: 5
    - device: mobile
      limit: 1440
    - device: tablet
      limit: 1440

cause

@Value("${login.expirations:}")
private List<DeviceExpiration> expirations;

solution

To mapping Object, using @ConfigurationProperties로 선언해야한다.

@Getter
@Component
@ConfigurationProperties("login")
public class ExpirationConfig {
    private List<DeviceExpiration> expirations;

    public void setExpirations(List<DeviceExpiration> expirations) {
        this.expirations = expirations;
    }
}

이렇게 하니 된다