java - 如何从 JPA resultList 获取更新的实体？

Question

我已经更新了事务中的一个对象，它已成功更新并与数据库同步...但是每当我使用 query.getResultList() 检索实体时，它都不会返回包含更新的对象和值的列表。

这里的代码指的是我在做什么......

    javax.persistence.EntityManager entityManager = java.beans.Beans.isDesignTime() ? null : javax.persistence.Persistence.createEntityManagerFactory("jdbc:oracle:thin:@Siddhant-PC:1521:XEPU").createEntityManager(); 
    javax.persistence.Query professionalWorkQuery = java.beans.Beans.isDesignTime() ? null : entityManager.createQuery("SELECT p FROM ProfessionalWork p order by p.jobNo");
    java.util.List<ProfessionalWork> professionalWorkList = java.beans.Beans.isDesignTime() ? java.util.Collections.emptyList() : professionalWorkQuery.getResultList();

用于更新对象的代码...

ProfessionalWork proWork = entityManager.find(ProfessionalWork.class, jobNo);

                entityManager.getTransaction().begin();
                    proWork.setStatus("Ready");
                    proWork.setReadyTime(DateWrapper.getTime());
                entityManager.getTransaction().commit();

用于检索所有对象的代码...

professionalWorkList = professionalWorkQuery.getResultList();
    Iterator lab =  professionalWorkList.listIterator();
    while(lab.hasNext()){
           ProfessionalWork pWork = (ProfessionalWork) lab.next();
           System.out.println(pWork.getJobNo()+" -- "+pWork.getStatus()); 
              //Here i'm getting All Objects(even newly added objects also...but i'm not getting my modified values in objects)
     }
professionalWorkList.clear();

Answer 1

刚刚在这里引用了该文档:https://docs.oracle.com/javaee/6/tutorial/doc/gkjjj.html 。很高兴它成功了!

professionalWorkQuery.setHint("javax.persistence.cache.storeMode", "REFRESH");