为什么每次在java中更新api时都会记录DOB是否更新

我正在记录字段，这些字段将在更新Api呼叫期间更新. 但无论是否更新，每次都会得到道布的字段

道布属于日期型

private Date DOB;

在有效载荷{ "DOB": "1990-01-01"}中传递此参数时记录道布值

dob: Mon Jan 01 05:30:00 IST 1990
Updated Fields during request: DOB  

是因为它也有时间吗？虽然我得到了相同的时间，但仍然是打印道布即使在价值相同而没有更新的情况下也更新.为什么会这样呢？

如果我像这样在有效载荷(postman )中超过道布

 "DOB": "20101212"

//it is printing only this 1970 value on log console
dob: Thu Jan 01 11:05:01 IST 1970 

我该如何处理这些情况呢？

代码

public static class Updater {
  private final OrgEmployeeMap existing;
  private final EmployeeInformation information;
  private final Set<String> updatedFields = new HashSet<>();

  public Updater(OrgEmployeeMap existing, EmployeeInformation information) {
    this.existing = existing;
    this.information = information;
  }

  public <T> Updater update(String fieldName,
                            Function<EmployeeInformation, T> newValueGetter,
                            Function<OrgEmployeeMap, T> oldValueGetter,
                            BiConsumer<OrgEmployeeMap, T> oldValueSetter) {
    final var newValue = newValueGetter.apply(information);
    final var oldValue = oldValueGetter.apply(existing);
    if (newValue == null || newValue.equals(oldValue)) {
      return this;
    }
    this.updatedFields.add(fieldName);
    oldValueSetter.accept(existing, newValue);
    return this;
  }

  public Set<String> getUpdatedFields() {
    return updatedFields;
  }
}
private void updateExistingEmployee(OrgEmployeeMap existingOrgEmployee, RequestMessage requestMessage) {
    try {
        EmployeeInformation employeeInfo = requestMessage.getData().get(0).getDemographicData().getEmployeeInformation().get(0);
        final var updater = new Updater(existingOrgEmployee, employeeInfo);

        updater
            .update("FirstName", EmployeeInformation::getEmployeeFirstName, OrgEmployeeMap::getFirstName, OrgEmployeeMap::setFirstName)
            .update("LastName", EmployeeInformation::getEmployeeLastName, OrgEmployeeMap::getLastName, OrgEmployeeMap::setLastName)
            .update("DOB", EmployeeInformation::getDOB, OrgEmployeeMap::getDob, OrgEmployeeMap::setDob)
            .update("Gender", EmployeeInformation::getGender, OrgEmployeeMap::getGender, OrgEmployeeMap::setGender)
            .update("Email", EmployeeInformation::getEmail, OrgEmployeeMap::getEmail, OrgEmployeeMap::setEmail);

        final var modifiedFields = updater.getUpdatedFields();
        if (!modifiedFields.isEmpty()) {
            log.info("Updated employee : " + String.join(", ", modifiedFields));
        }

        orgEmployeeMapRepository.save(existingOrgEmployee);

        log.info("Updated Employee : " + existingOrgEmployee);
    } catch (JSONException e) {
        log.error("error in processing the request error", e.getMessage());
    } catch (Exception ex) {
        log.error("An unexpected error occurred: " + ex.getMessage(), ex);
    }
}

DTO类

@Data
public class EmployeeInformation {

    @JsonProperty(value = "Email")
    private String Email;

    @JsonProperty(value = "EmployeeFirstName")
    private String EmployeeFirstName;

    @JsonProperty(value = "EmployeeLastName")
    private String EmployeeLastName;

    @JsonProperty(value = "DOB")
    private Date DOB;

..
}

模型类

@Data
@Entity
@Table(name = "employee")
public class EmployeeMap {
@Id
    @Column(name = "Id", length = 100, nullable = false)
    private String Id;

    @Column(name = "firstName", length = 100, nullable = false)
    private String firstName;

    @Column(name = "lastName", length = 100)
    private String lastName;

    @Column(name = "email", length = 100, nullable = false)
    private String email;

    @Column(name = "gender")
    private String gender;

    @Column(name = "dob", nullable = false)
    private Date dob;
}