org.hibernate.QueryException:Expected positional parameter count: 1

org.hibernate.QueryException:Expected positional parameter count: 1  

org.hibernate.QueryException:Expected positional parameter count: 1, actual parameters: [] [from LhClient c where c.wnamw=?]

Query query=session.createQuery("from LhClient c where c.wnamw=?");
query.setString(0, wxy);

在hql语句中有一个占位符“?”，则在query.setParameter()处，一定要有一个相对用的位被传入，否则会出现上述异常

++

1\

String hql="from User where username=? and userpass=?"; 

query.setParameter(0,"乔丹",Hibernate.STRING);  

或者

query.setString(0, "乔丹");

2\

   String hql1="from User where username=:username and userpass=:userpass";  

query1.setParameter("username","乔丹",Hibernate.STRING);