Hibernate更新数据（不用update也可以） - 森林木马 - 博客园
https://www.cnblogs.com/owenma/p/3481497.html
hibernate级联更新会把外键id设置为null,而是直接删除不关联的数据-CSDN问答
https://ask.csdn.net/questions/352370
Hibernate Example for Id column - Stack Overflow
https://stackoverflow.com/questions/5051060/hibernate-example-for-id-column
nhibernate - id change - C# / C Sharp
https://bytes.com/topic/c-sharp/answers/431260-nhibernate-id-change
Hibernate Tips: How to Map Multiple Entities to the Same Table
https://thoughts-on-java.org/hibernate-tips-map-multiple-entities-same-table/