apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/entity/ConsumerAudit.java/ConsumerAudit/prePersist
class ConsumerAudit:  @PrePersist
  protected void prePersist() {
    if (this.dataChangeCreatedTime == null) {
      this.dataChangeCreatedTime = new Date();
    }
    if (this.dataChangeLastModifiedTime == null) {
      dataChangeLastModifiedTime = this.dataChangeCreatedTime;
    }
  }