提交表單后控制臺輸出語句WARN: [DEPRECATION] Encountered positional parameter near line 1, column 34 in HQL: [from entity.Users where username=? and password=? ].? Positional parameter are considered deprecated; use named parameters or JPA-style positional parameters instead.三月 01, 2018 6:34:23 下午 org.hibernate.hql.internal.ast.HqlSqlWalker generatePositionalParameterWARN: [DEPRECATION] Encountered positional parameter near line 1, column 49 in HQL: [from entity.Users where username=? and password=? ].? Positional parameter are considered deprecated; use named parameters or JPA-style positional parameters instead.Hibernate:?? ? select? ? ? ? users0_.uid as uid1_1_,? ? ? ? users0_.username as username2_1_,? ? ? ? users0_.password as password3_1_?? ? from? ? ? ? USERS users0_?? ? where? ? ? ? users0_.username=??? ? ? ? and users0_.password=?public?class?UserDAOImpl?implements?UsersDAO{ @Override public?boolean?usersLogin(Users?u)?{ //?TODO?Auto-generated?method?stub //創(chuàng)建事物對象 //事務(wù)(Transaction)是訪問并可能更新數(shù)據(jù)庫中各種數(shù)據(jù)項的一個程序執(zhí)行單元(unit) Transaction?ts?=?null; String?hql?=?""; try?{ Session?session?=?MyHibernateSessionFactory.getSessionFactory().getCurrentSession(); //開啟事物 ts?=session.beginTransaction(); //hql查詢語句 hql?=?"from?Users?where?username=??and?password=??"; //Query是Hibernate的查詢接口，用于從數(shù)據(jù)存儲源查詢對象及控制執(zhí)行查詢的過程，Query包裝了一個HQL查詢語句 org.hibernate.Query?query?=session.createQuery(hql); //傳遞參數(shù) query.setParameter(0,?u.getUsername()); query.setParameter(1,?u.getPassword()); //調(diào)用其中的方法得到結(jié)果?? List?list?=query.list(); ts.commit(); if?(list.size()>0)?{ return?true; }?else?{ return?false; } } catch?(Exception?ex)?{ //?TODO:?handle?exception //打印異常對象 ex.printStackTrace(); return?false; } finally{ //釋放事物對象資源 if?(ts!=null)?{ ts=null; } } } } public?class?UsersAction?extends?superAction?implements?ModelDriven<Users>{ /** ?*? ?*/ private?static?final?long?serialVersionUID?=?1L; private?Users?user?=?new?Users(); //用戶登錄動作 public?String?login()?{ UsersDAO?udao?=new?UserDAOImpl(); if?(udao.usersLogin(user))?{ return?"login_success"; } else?{ return?"login_failure"; } } @Override public?Users?getModel()?{ //?TODO?Auto-generated?method?stub return?this.user; } }