JSPʵÏÖ¼òÒ×µÄSQL±¨±í
ÊäÈë: select ID as ±àºÅ, NAME as ÐÕÃû, AGE as ÄêÁä from XXX
Êä³ö:
񅧏
ÐÕÃû
ÄêÁä
ÒªÇóÊÇÈç¹ûSQL±ä¶¯, ÈÔȻҪÏÔʾ³öÀ´ËùÓеıðÃû×Ö¶ÎÐÅÏ¢ºÍÊý¾Ý.
ÒòΪÏÖÔÚHibernateÓõıȽϹ㷺, ËùÒÔÓÅÏÈ¿¼ÂÇÓÃHibernateÀ´ÊµÏÖ, ½á¹û·¢ÏÖÈç¹ûÊÇʵÌåÓ³Éä²éѯÓï¾ä, ¿ÉÒÔ·½±ãµÄÓÃ:List<String> Query.getReturnAliases() »ñµÃ±ðÃû, È»¶øÎÒÃÇÖªµÀ²éѯʱÓÐʱºòÓï¾äÊǺܸ´ÔÓµÄ, ²»È«ÊÇHQL, ÕâʱºòÓÃSQLQueryµÄʱºò, ¾ªÑȵÄÌáʾÕâ¸ö·½·¨ÉÐδʵÏÖ(×îаæµÄHibernate 3.3 ÊÇ·ñʵÏÖÉÐδ²âÊÔ), Óõİ汾ÊÇHibernate 3.2, ¶ÔÓ¦µÄ´úÂëÊÇ:
DAO
/**
* ¸ù¾Ý²éѯÓï¾ä·µ»Ø½á¹û, ²¢°üº¬½á¹ûµÄÁÐÃû
* @param hql
* @param args
* @return
*/
public List queryAllForReport( final String hql, final Object... args) {
List list = getHibernateTemplate().executeFind(new HibernateCallback() {
public Object doInHibernate(Session session)
throws HibernateException, SQLException {
Query query = session.createQuery(hql);
for(int i =0; i < args.length; i++) {
query.setParameter(i, args[i]);
}
List list = query.list();
list.add(0, query.getReturnAliases());
return list;
}
});
// Hibernate×öcount¼ÆËã·µ»ØÒ»°ã¶¼ÊǶÔÏó
return list;
}
²âÊÔ´úÂë:
List<Object[]> list = dao.queryAllForReport("select id as ±àºÅ, name as µÇ¼Ãû, address as µØÖ·, realName from User");
System.out.println(list.size());
for(Object[] row : list) {
for(Object v : row) {
System.out.print(v + "\t");
}
System.out.println();
}
×îºó²»µÃ²»»Øµ½JDBC, Óà ResultSetºÍResultSetMetaDataʵÏÖÁËÕâ¸ö¹¦ÄÜ, Ïêϸ´úÂë(×Ô¼º½øÐÐÐ޸ļ´¿ÉʵÏÖ)ÈçÏÂ:
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