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Titlebook: Hibernate Recipes; A Problem-Solution A Joseph Ottinger,Srinivas Guruzu,Gary Mak Book 2015Latest edition Gary Mak and Srinivas Guruzu and J

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樓主: collude
51#
發(fā)表于 2025-3-30 10:56:38 | 只看該作者
52#
發(fā)表于 2025-3-30 12:26:40 | 只看該作者
Component Mapping,Hibernate makes it easy to employ a fine-grained domain model so you can have more classes than tables. In other words, you can map a single record in a table to more than one class by having one . class type; the others should be . class types.
53#
發(fā)表于 2025-3-30 19:01:36 | 只看該作者
Many-to-One and One-to-One Mapping,In general, entities are related or associated to each other. For example, a . entity is associated with an . entity. A . entity can have one or more than one . entity (for example, . and .). These relationships or associations are represented differently in a relational model and the domain/object model.
54#
發(fā)表于 2025-3-30 20:44:15 | 只看該作者
Many-Valued Associations,A many-valued association is by definition a collection of references to entities. The collection can be of type ., ., ., and so on in Java.
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