问题描述

我认为最适合您的方法是EntityListener使用@PrePersist和@PreUpdate注释，为实体侦听器创建配置，然后您将可以访问要保存的每个实例，每次尝试保留或更新内容时都会调用此方法。休眠或春季数据存储库

public class EntityToPersistListener{

   @PrePersist
   @PreUpdate
   public void methodExecuteBeforeSave(final EntityToPersist reference) {
      //Make any change to the entity such as calculation before the save process
      reference.setAmount(xxxx)
    }

}

您只需要在实体bean上方添加注释

@Entity
@Table(name = "", schema = "", catalog = "")
@EntityListeners(EntityToPersistListener.class)
public class EntityToPersist implements Serializable {

检查此链接以获取更多参考

解决方法