例5.3有點誤導。 javax.persistence.Query
不必使用。相反,org.hibernate.search.jpa.FullTextQuery
有我需要的setProjection()
方法。下面是生成的代碼(用全類名):
//Open JPA session
javax.persistence.EntityManagerFactory emf=javax.persistence.Persistence.createEntityManagerFactory("manager1");
javax.persistence.EntityManager em=emf.createEntityManager();
em.getTransaction().begin();
//Make a FullText EM from the JPA session.
org.hibernate.search.jpa.FullTextEntityManager fullTextSession=org.hibernate.search.jpa.Search.getFullTextEntityManager(em);
//Build the lucene query.
org.apache.lucene.queryParser.QueryParser parser=new org.apache.lucene.queryParser.QueryParser("data1",new org.apache.lucene.analysis.standard.StandardAnalyzer());
org.apache.lucene.search.Query query=parser.parse("FindMe");
//Convert to a hibernate query.
org.hibernate.search.jpa.FullTextQuery query2=fullTextSession.createFullTextQuery(query, SampleBean.class);
//Set the projections
query2.setProjection("id");
//Run the query.
for (Object[] row:(List)query2.getResultList()){
//Show the list of id's
System.out.println(row[0]);
}
//Close
em.getTransaction().commit();
em.close();
emf.close();
query2
做投影,一切都很好!