jpa - 获取与 JPA 中的条件查询连接的两个表的所有列

Question

我已经加入了两个带有 Jpa Api 标准的表。但我需要加入两个表的列:

CriteriaBuilder criteriaBuilder = em.getCriteriaBuilder();
        CriteriaQuery<FacturePoste> criteria = criteriaBuilder.createQuery(FacturePoste.class);
        Root<FacturePoste> root = criteria.from(FacturePoste.class);
        Join<FacturePoste, FactureEntete> contactInfoJoin = root.join("numeroFacture");
          TypedQuery<FacturePoste> query = em.createQuery(criteria.multiselect(contactInfoJoin));list = query.getResultList();

请帮我。

Answer 1

您将必须传递如下所述的实体图作为查询和传递的提示
仅 root 在 criteria.select(root) 中。

CriteriaBuilder criteriaBuilder = 
em.getCriteriaBuilder();
CriteriaQuery<FacturePoste> criteria =    
criteriaBuilder.
createQuery(FacturePoste.class);
Root<FacturePoste> root = 
criteria.from(FacturePoste.class);
Join<FacturePoste, FactureEntete> 
contactInfoJoin = 
root.join("numeroFacture");
TypedQuery<FacturePoste> query = 
em.createQuery(criteria.select(root));

 //   Create an entity graph with a subgraph 
 EntityGraph<FacturePoste> graph = 
 em.createEntityGraph(FacturePoste.class);
 graph.addSubgraph("numeroFacture");

 query.setHint("javax.persistence.fetchgraph", 
 graph);

 list = query.getResultList();

 Note:It will be better if you use static 
 meta model instead of passing entity feild.     
 names directly.