如何使用對象查詢語言從查詢中獲取結果列表

Question

我正在使用JPA / Hibernate，我想知道如何使用createquery檢索列表。 我努力了 ：

EntityManagerFactory emf=Persistence.createEntityManagerFactory("JiraMapPUKPI");  
EntityManager em= emf.createEntityManager();
EntityTransaction entr=em.getTransaction();
entr.begin();
Query multipleSelect =em.createQuery("select distinct k.kpiName FROM Kpi k ,ProfilUser p ,AssociationKpiProfil a WHERE p.profilUserId= :w and p.profilUserId= a.profilUser and a.kpi=k.kpiId " ).setParameter("w", userid);

但后來我不能使用：

List userList = (List)multipleSelect.getResultList();

因為multipleSelect不包含getResultList方法

我也嘗試過：

   javax.persistence.Query multipleSelect= em.createQuery("select k.kpiName FROM Kpi k ,ProfilUser p ,AssociationKpiProfil a WHERE p.profilUserId= :w and p.profilUserId= a.profilUser and a.kpi=k.kpiId " );
   multipleSelect.setParameter("w", userid);
    List usrpro= multipleSelect.getResultList();

但是出現此錯誤：

EL Warning]: 2011-06-21 08:53:08.81--UnitOfWork(6850900)--Exception [EclipseLink-4002]   (Eclipse Persistence Services - 2.2.0.v20110202-r8913):    org.eclipse.persistence.exceptions.DatabaseException
Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have     an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')) AND (t3.KPI_ID = t0.KPI_ID.t0.KPI_ID)) AND (t2.PROFIL_USER_ID = t3.PROFIL_ID)' at line 1
Error Code: 1064
Call: SELECT t0.KPI_NAME FROM association_kpi_profil t3, profil_user t2, profil_user  , kpi t0 WHERE ((((t1.PROFIL_USER_ID = ?) AND (t1.PROFIL_USER_ID = )) AND (t3.KPI_ID =  t0.KPI_ID.t0.KPI_ID)) AND (t2.PROFIL_USER_ID = t3.PROFIL_ID))
bind => [1 parameter bound]
Query: ReportQuery(referenceClass=Kpi sql="SELECT t0.KPI_NAME FROM association_kpi_profil t3, profil_user t2, profil_user t1, kpi t0 WHERE ((((t1.PROFIL_USER_ID = ?) AND (t1.PROFIL_USER_ID = )) AND (t3.KPI_ID = t0.KPI_ID.t0.KPI_ID)) AND (t2.PROFIL_USER_ID = t3.PROFIL_ID))")

Internal Exception: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have  an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')) AND (t3.KPI_ID = t0.KPI_ID.t0.KPI_ID)) AND (t2.PROFIL_USER_ID = t3.PROFIL_ID)' at line 1
Error Code: 1064
Call: SELECT t0.KPI_NAME FROM association_kpi_profil t3, profil_user t2, profil_user    t1, kpi t0 WHERE ((((t1.PROFIL_USER_ID = ?) AND (t1.PROFIL_USER_ID = )) AND (t3.KPI_ID = t0.KPI_ID.t0.KPI_ID)) AND (t2.PROFIL_USER_ID = t3.PROFIL_ID))
bind => [1 parameter bound]
Query: ReportQuery(referenceClass=Kpi sql="SELECT t0.KPI_NAME FROM   association_kpi_profil t3, profil_user t2, profil_user t1, kpi t0 WHERE ((((t1.PROFIL_USER_ID = ?) AND (t1.PROFIL_USER_ID = )) AND (t3.KPI_ID = t0.KPI_ID.t0.KPI_ID)) AND (t2.PROFIL_USER_ID = t3.PROFIL_ID))")
errrrrs
list kpiiiiiiiinull

請問我該怎么做？ 謝謝

Answer 1

Hibernate生成的查詢不正確。 t1.PROFIL_USER_ID參數不存在。 嘗試檢查您的映射，並使用JOIN而不是equals。