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

Editor to share with you what Hibernate query methods, I believe that most people do not know much, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

1: QBE (Query By Example)

Criteria cri = session.createCriteria (Student.class); cri.add (Example.create (s)); / / s is a Student object list cri.list ()

Essence: create a template, for example, I have a table serial has a giftortoy field, I set serial.setgifttoy ("2")

Then all the data with giftortoy 2 in this table will come out.

2: QBC (Query By Criteria) is mainly composed of Criteria,Criterion,Oder,Restrictions class.

Session = this.getSession (); Criteria cri = session.createCriteria (JdItemSerialnumber.class); Criterion cron = Restrictions.like ("customer", name); cri.add (cron); list = cri.list ()

Comparison operator

HQL operator QBC operator meaning

= Restrictions.eq () equals

Restrictions.not (Exprission.eq ()) is not equal to

> Restrictions.gt () is greater than

> = Restrictions.ge () greater than or equal to

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