HQL多表聯合查詢的問題 HQL查詢多表的時候，取出結果是兩個對象的列表，但是我只要我自己想要的屬性，之前的HQL語句是這樣寫的：
from
Hytxbz h,Tgbzk t
where
h.hytxbzid
=
t.hytxbzid
and
t.bztgid
=
:bztgid
結果我debug去看query.list();是Hytxbz和Tgbzk兩個對象的列表，結果並不是我想要的，我改成
from
Hybztx h
where
h.hytxbzid
in
(
select
t.hytxbzid
from
Tgbzk
where
t.bztgid
=
:bztgid)
還是不行，google一把，發現可以這樣寫
select
h
from
Hytxbz
as
h,Tgbzk
as
t
where
h.hytxbzid
=
t.hytxbzid
and
t.bztgid
=
:bztgid
如果想取得對應屬性的話，也可以這樣寫
select
h.hytxbzid
from
Hytxbz
as
h,Tgbzk
as
t
where
h.hytxbzid
=
t.hytxbzid
and
t.bztgid
=
:bztgid
發現in的語句可以這樣寫
String ids[]
=
new
String[]
{"1","2","3"}
; 
String hql
=
"
from com,you.YourPOJO where id in (?)
"
;
Query query
=
session.createQuery(hql);
query .setParameters(ids);
相關方法：
Query setParameters(Object[] objectArray, Type[] typeArray)
throws
HibernateException;
Query setParameterList(String string, Collection collection, Type type)
throws
HibernateException;
Query setParameterList(String string, Collection collection)
throws
HibernateException;
Query setParameterList(String string, Object[] objectArray, Type type)
throws
HibernateException;
Query setParameterList(String string, Object[] objectArray)
throws
HibernateException