You smiled and talked to me of nothing and I felt that for this I had been waiting long.

The trees come up to my window like the yearning voice of the dumb earth.

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具有一个直观的、可扩展的条件查询API是Hibernate的特色。
1. 创建一个Criteria 实例
org.hibernate.Criteria接口表示特定持久类的一个查询。Session是 Criteria实例的工厂。

Criteria crit = sess.createCriteria(Cat.class);
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crit.setMaxResults(50);
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List cats = crit.list();

2. 限制结果集内容
一个单独的查询条件是org.hibernate.criterion.Criterion 接口的一个实例。org.hibernate.criterion.Restrictions类定义了获得某些内置Criterion类型的工厂方法。

List cats = sess.createCriteria(Cat.class)
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.add( Restrictions.like("name", "Fritz%") )
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.add( Restrictions.between("weight", minWeight, maxWeight) )
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.list();

posted on 2008-05-04 15:04 钩子阅读(182) 评论(0) 编辑收藏所属分类: opensources