構造器的順序需要和hql中的順序一致。否則會出現如下錯誤：

Exception in thread "main" org.hibernate.hql.ast.QuerySyntaxException: Unable to locate appropriate constructor on class [com.flyinsky.eagle.user.po.UserInforPO] [select new UserInforPO(carId,name) from com.flyinsky.eagle.user.po.UserInforPO where name = ? and password = ?]
?at org.hibernate.hql.ast.ErrorCounter.throwQueryException(ErrorCounter.java:59)
?at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:225)
?at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:158)
?at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:109)
?at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:75)
?at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:54)
?at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:71)
?at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133)
?at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112)
?at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1583)
?at com.flyinsky.eagle.user.dao.UserDAO.getAllUsers(UserDAO.java:263)
?at com.flyinsky.eagle.user.test.TestHibernate.main(TestHibernate.java:69)
Caused by:? Unable to locate appropriate constructor on class [com.flyinsky.eagle.user.po.UserInforPO]
[cause=org.hibernate.PropertyNotFoundException: no appropriate constructor in class: com.flyinsky.eagle.user.po.UserInforPO]
?at org.hibernate.hql.ast.tree.ConstructorNode.resolveConstructor(ConstructorNode.java:122)
?at org.hibernate.hql.ast.tree.ConstructorNode.prepare(ConstructorNode.java:88)
?at org.hibernate.hql.ast.HqlSqlWalker.processConstructor(HqlSqlWalker.java:837)
?at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectExpr(HqlSqlBaseWalker.java:1952)
?at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectExprList(HqlSqlBaseWalker.java:1821)
?at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectClause(HqlSqlBaseWalker.java:1392)
?at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:553)
?at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:281)
?at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:229)
?at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:218)
?... 10 more

?

public class UserInforPO {private int carId;private String name;private int age;private String password;private Date regDate;private List<UserAddressPO> allAddress = new ArrayList<UserAddressPO>();private String email;public UserInforPO() {}public UserInforPO(String name,int carId) {this.name = name;this.carId = carId;}public UserInforPO(String name, int age, List address) {this.name = name;this.allAddress = address;this.age = age;}

?

public void getAllUsers(UserInforPO userPO){String hql = "select new UserInforPO(carId,name) from UserInforPO " +"where name = ? and password = ?";//安位置進行數值綁定Session session = DBUtil.getSession();Query query = session.createQuery(hql);query.setParameter(0, userPO.getName());query.setParameter(1, userPO.getPassword());List list = query.list();for(int i = 0; i < list.size(); i++){UserInforPO user = (UserInforPO)list.get(i);System.out.println(user.getCarId() + " " + user.getName());}

?將PO改為如下就可以了

public class UserInforPO {private int carId;private String name;private int age;private String password;private Date regDate;private List<UserAddressPO> allAddress = new ArrayList<UserAddressPO>();private String email;public UserInforPO() {}public UserInforPO(int carId,String name) {this.name = name;this.carId = carId;}

?

總結

以上是生活随笔為你收集整理的hibernate中PO的构造器顺序的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。