@Autowired
    KundeRepository repo;

    public void safe(Kunde kd) {
        repo.save(kd);
    }
 public void safeAll(Iterable<Kunde> kt) {
        repo.save(kt);
        repo.flush();
    }

public class account implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
    }

       @Entity
@Table(name = "kunde")
@NoArgsConstructor
public class Kunde implements Serializable {

    public static final String kundennummerKey = "KUNDENNUMMER";

    private static final long serialVersionUID = 1L;

    @Id
    @Getter
    @Setter
    private String id;


    @Entity
@Table(name = "transaktionsgruppe")
public class Transaktionsgruppe  implements Serializable {


    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    private String bezeichnung;

datasource:
       type: com.zaxxer.hikari.HikariDataSource
       url: dburl
       username: user
       password: pw
       hikari:
         validation-timeout: 10000
         health-check-properties: {"connectivityCheckTimeoutMs","1000"}
jpa:
    show-sql: true
    properties:
        hibernate.cache.use_second_level_cache: false
        hibernate.cache.use_query_cache: false
        hibernate.generate_statistics: false
        hibernate.jdbc.batch.size: 100
        hibernate.order_inserts: true