JPA CriteriaBuilder子查询
给自己做个备忘
if (keyWord != null && !keyWord.trim().equals(""))
{
// 创建子查询对象
Subquery<Store> subquery = criteriaQuery.subquery(Store.class);
Root<Store> root2 = subquery.from(Store.class);
subquery.select(root2.<Store> get("id"));
subquery.where(criteriaBuilder.like(root2.<String> get("name"), "%" + keyWord + "%"));
// 给读者稍微解释一下,也给自己留个记忆
// 这里的意图是将关键做两个模糊检索,一个是在本表中检索title字段
// 就是criteriaBuilder.like(root.<String> get("title"), "%" + keyWord + "%")
// 二是将字段与子表中的检索出来的id与本表中store字段做匹配
// criteriaBuilder.in(root.get("store")).value(subquery))
// 至于id怎么检索出来的,用子查询模糊检索出来的,参照上面的子查询
restrictions = criteriaBuilder.and(restrictions,criteriaBuilder.or(criteriaBuilder.like(root.<String> get("title"), "%" + keyWord + "%"),criteriaBuilder.in(root.get("store")).value(subquery)));
}
Jpa 在CriteriaBuilder中添加where条件NotIn子查询
final CriteriaBuilder cb = entityManager.getCriteriaBuilder();
final CriteriaQuery<Person> cq = cb.createQuery(Person.class);
final Root<Person> root = cq.from(Person.class);
cq.select(root);
final Subquery<Integer> subquery = cq.subquery(Integer.class);
final Root<Person> validityIDSQ = subquery.from(Person.class);
subquery.select(cb.max(validityIDSQ.get(Person_.validityID)));
subquery.groupBy(validityIDSQ.get(Person_.personID));
cq.where(cb.in(root.get(Person_.validityID)).value(subquery));
// 将生成
select
person0_.id as id1_0_,
person0_.personID as personID2_0_,
person0_.validityID as validity3_0_,
person0_.value as value4_0_
from
person person0_
where
person0_.validityID in (
select
max(person1_.validityID)
from
person person1_
group by
person1_.personID)
自身所需NotIn语法,所以是
Subquery<String> manageUserSubquery = query.subquery(String.class);
Root<RelationUserManagePlateDomain> relationUserManagePlateDomainRoot = manageUserSubquery.from(RelationUserManagePlateDomain.class);
Join<RelationUserManagePlateDomain, UserDomain> relationUserManagePlateDomainUserDomainJoin = relationUserManagePlateDomainRoot.join(RelationUserManagePlateDomain_.user, JoinType.INNER);
Subquery<String> subquery = manageUserSubquery.select(relationUserManagePlateDomainUserDomainJoin.get(UserDomain_.id));
Predicate predicate1 = criteriaBuilder.and(criteriaBuilder.not(criteriaBuilder.in(root.get(UserDomain_.id)).value(manageUserSubquery)));
predicate.getExpressions().add(predicate1);
以上为个人经验,希望能给大家一个参考,也希望大家多多支持编程网。