我正在尝试使用休眠条件查询对三个字段进行基本的“或”。
例子
class Whatever{
string name;
string address;
string phoneNumber;
}
我想构建一个条件查询,其中我的搜索字符串可以匹配“名称”或“地址”或“电话号码”。
你想用Restrictions.disjuntion()
. 像这样
session.createCriteria(Whatever.class)
.add(Restrictions.disjunction()
.add(Restrictions.eq("name", queryString))
.add(Restrictions.eq("address", queryString))
.add(Restrictions.eq("phoneNumber", queryString))
);
请参阅此处的 Hibernate 文档。
假设您有一个休眠会话,那么类似以下的东西应该可以工作:
Criteria c = session.createCriteria(Whatever.class);
Disjunction or = Restrictions.disjunction();
or.add(Restrictions.eq("name",searchString));
or.add(Restrictions.eq("address",searchString));
or.add(Restrictions.eq("phoneNumber",searchString));
c.add(or);
//Expression : (c1 AND c2) OR (c3)
Criteria criteria = session.createCriteria(Employee.class);
Criterion c1 = Restrictions.like("name", "%e%");
Criterion c2 = Restrictions.ge("salary", 10000.00);
Criterion c3 = Restrictions.like("name", "%YYY%");
Criterion c4 = Restrictions.or(Restrictions.and(c1, c2), c3);
criteria.add(c4);
//对 (c1 OR c2) AND c3 或任何复杂的表达式都可以做同样的事情。
//Expression : (c1 AND c2) OR (c3)
Criteria criteria = session.createCriteria(Employee.class);
Criterion c1 = Restrictions.like("name", "%e%");
Criterion c2 = Restrictions.ge("salary", 10000.00);
Criterion c3 = Restrictions.like("name", "%YYY%");
Criterion c4 = Restrictions.or(Restrictions.and(c1, c2), c3);
criteria.add(c4);
//Same thing can be done for (c1 OR c2) AND c3, or any complex expression.
以防万一有人偶然发现与 NHibernate 相同的问题:
ICriteria c = session.CreateCriteria(typeof (Whatever))
.Add(Expression.Disjunction()
.Add(Expression.Eq("name", searchString))
.Add(Expression.Eq("address", searchString))
.Add(Expression.Eq("phoneNumber", searchString)));
可以使用 or / 应用条件,并使用析取在不同级别的查询中应用条件
Criteria query = getCriteria("ENTITY_NAME");
query.add(Restrictions.ne("column Name", current _value));
Disjunction disjunction = Restrictions.disjunction();
if (param_1 != null)
disjunction.add(Restrictions.or(Restrictions.eq("column Name", param1)));
if (param_2 != null)
disjunction.add(Restrictions.or(Restrictions.eq("column Name", param_2)));
if (param_3 != null)
disjunction.add(Restrictions.or(Restrictions.eq("column Name", param_3)));
if (param_4 != null && param_5 != null)
disjunction.add(Restrictions.or(Restrictions.and(Restrictions.eq("column Name", param_4 ), Restrictions.eq("column Name", param_5 ))));
if (disjunction.conditions() != null && disjunction.conditions().iterator().hasNext())
query.add(Restrictions.and(disjunction));
return query.list();
这对我来说适用于 OR 条件,也适用于 IN 条件,而不是在本次讨论中投票最多的答案:
criteria.add( Restrictions.or(
Restrictions.eq(ch.getPath(ch.propertyResolver().getXXXX()), "OR_STRING"),
Restrictions.in(ch.getPath(ch.propertyResolver().getYYYY()), new String[]{"AA","BB","CC"})
));
结果查询:
and (
this_.XXXX=?
or this_.YYYY in (
?, ?, ?
)
)
如果有人使用 CriteriaQuery 而不是 Criteria,您可以将所有表达式放在一个Predicate
列表中,然后按谓词大小放置一个 OR,如下所示:
List<Predicate> predicates = new ArrayList<>();
if (...) {
predicates.add(...);
}
criteriaQuery.where(cb.or(predicates.toArray(new Predicate[predicates.size()])));