查詢已知表名的實體時推薦使用getHibernateTemplate().executeWithNativeSession() + SQLQuery方式。

以下測試使用JUnit進行，僅查詢一次，查詢結果為5條記錄。各種方式的詳細程式碼及執行時間如下所示：

方式1，正常getHibernateTemplate().find()方式（183ms)：

List list = getHibernateTemplate() .find( "select o.id from SfmFileIndex o where o.bussNo = ? and o.typePath = ? and o.validStatus = ? order by o.uploadTime", new Object[] { bussNo, typePath, "1" });

方式2，使用getHibernateTemplate().execute() + Query方式（214ms）：

List list = (List) getHibernateTemplate().execute( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Query query = session.createQuery("select o.id from SfmFileIndex o where o.bussNo = ? and o.typePath = ? and o.validStatus = ? order by o.uploadTime"); query.setParameter(0, bussNo); query.setParameter(1, typePath); query.setParameter(2, "1"); return query.list(); } });

方式3，使用getHibernateTemplate().executeWithNativeSession() + Query方式（184ms）：

List list = (List) getHibernateTemplate().executeWithNativeSession( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { Query query = session .createQuery("select o.id from SfmFileIndex o where o.bussNo = ? and o.typePath = ? and o.validStatus = ? order by o.uploadTime"); query.setParameter(0, bussNo); query.setParameter(1, typePath); query.setParameter(2, "1"); return query.list(); } });

方式4，使用getHibernateTemplate().execute() + SQLQuery方式（102ms）：

List list = (List) getHibernateTemplate().execute( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { SQLQuery query = session .createSQLQuery("select o.id from Sfm_FileIndex o where o.bussNo = ? and o.typePath = ? and o.validStatus = ? order by o.uploadTime"); query.setParameter(0, bussNo); query.setParameter(1, typePath); query.setParameter(2, "1"); return query.list(); } }); 

方式5，使用getHibernateTemplate().executeWithNativeSession() + SQLQuery方式（68ms）：

List list = (List) getHibernateTemplate().executeWithNativeSession( new HibernateCallback() { public Object doInHibernate(Session session) throws HibernateException, SQLException { SQLQuery query = session .createSQLQuery("select o.id from Sfm_FileIndex o where o.bussNo = ? and o.typePath = ? and o.validStatus = ? order by o.uploadTime"); query.setParameter(0, bussNo); query.setParameter(1, typePath); query.setParameter(2, "1"); return query.list(); } }); 

方式6，使用JDBC （用於比較，程式碼不夠健壯）（37ms）：

PreparedStatement ps = getSession() .connection() .prepareStatement( "select o.id from sfm_fileindex o where o.bussNo = ? and o.typePath = ? and o.validStatus = ? order by o.uploadTime"); ps.setString(1, bussNo); ps.setString(2, typePath); ps.setString(3, "1"); ResultSet rs = ps.executeQuery(); List list = new ArrayList(); while (rs.next()) { list.add(new Long(rs.getLong(1))); } rs.close(); ps.close();