Shulou(Shulou.com)06/02 Report--

This article introduces the relevant knowledge of "Hibernate Mapping Test and Analysis". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

In fact, there are many types of Hibernate mapping, figure out one-to-many, basically all Hibernate mapping is understood, one-to-one is also a special case of one-to-many, many-to-many can also be converted into one-to-many and many-to-one, and many-to-many is rarely used in practice.

The example consists of two parts:

1. One-to-many two-way mapping: the model is a "class-student" model. The two entities are Tclass and Student.

2. Optimistic locks are used, and versions use incremental integers and timestamps, respectively. The two entities are Foo and Bar.

Tclass entities and their mappings:

Public class Tclass implements java.io.Serializable {/ / Fields private Long cid; private String cname; private Set students = new HashSet (0) / / Constructors / / Property accessors. Public String toString () {return "Tclass {" + "cid=" + cid + ", cname='" + cname +'\'+'}';} "Hibernate Mapping Test Analysis" ends here. Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.