public interface PaymentService {
  String createPaymentQrcode();
}

@Service
@Profile("alipay")
public class AlipayService implements PaymentService {
  @Override
  public String createPaymentQrcode() {
    return "支付宝支付二维码";
  }
}

@Service
@Profile({"default", "wechatpay"})
public class WechatpayService implements PaymentService {
  @Override
  public String createPaymentQrcode() {
    return "微信支付二维码";
  }
}

java -jar -Dspring.profiles.active='alipay' xxx.jar

@Component
@ConfigurationProperties("jdbc")
public class JdbcProperties {
  private String username;
  private String password;
  // getters and setters
}

jdbc.username=root
jdbc.password=123654

jdbc.username=produser
jdbc.password=16888888

jdbc:
 username: root
 password: 123654

jdbc:
 username: produser
 password: 16888888

app:
 version: 1.0.0
spring:
 profiles:
  active: "dev"
---
spring:
 profiles: dev
jdbc:
 username: root
 password: 123654
---
spring:
 profiles: prod
jdbc:
 username: produser
 password: 16888888

java -jar -Dspring.profiles.active=prod xxxx.jar