Hibernat查询

Hibernate的查询方式
参考：Hibernate ORM 最佳实践

• 通过对象表示符查询

Company c = (Company)session.get(Company.class,new Long(1));

• 面向对象查询--HQL

Query q = session.createQuery("From Company AS c WHERE c.name = :cname");
q.setString("cname","JNotNull");
List result = q.list();

• 按条件查询方式--QBC

Criteria criteria = session.createCriteria(Company.class);
criteria.add(Expression.like("name","JNotNull"));
List result = criteria.list();

• 按样例查询方式--QBE

Company exCompany = new Company();
exCompany.setName("JNotNull");
Criteria criteria = session.createCriteria(Company.class);
criteria.add(Example.create(exCompany));
List result = criteria.list();

• 传统的查询方式--Native SQL

List result = session.createSQLQuery("select {c.*} from Company c").addEntity("c",Company.class).setMaxResults(50).list();