关于Hibernate使用Criteria查询的问题，无法获得字段的异常？

[fengyang00]

分别用HQL和Criteria两种方式去查询，前者返回正常结果，后者报异常，我先分别把两段代码发给大家看看

HQL：

String hql=" from Reader where login='xiyangyang' and password='123'";
List list = HibernateUtil.getSession().createQuery(hql).list();
Reader reader =  (Reader)list.get(0);
System.out.println(reader.getName());

这样是没问题的

Criteria：

Criteria criteria = HibernateUtil.getSession().createCriteria(Reader.class);
			
String username="xiyangyang";
criteria.add(Restrictions.eq("login", username));
List list = criteria.list();
Reader reader =(Reader) list.get(0);
System.out.println(reader.getName());

异常：
org.hibernate.QueryException: could not resolve property: login of: models.Reader
at org.hibernate.persister.entity.AbstractPropertyMapping.propertyException(AbstractPropertyMapping.java:81)
at org.hibernate.persister.entity.AbstractPropertyMapping.toType(AbstractPropertyMapping.java:75)
at org.hibernate.persister.entity.AbstractEntityPersister.getSubclassPropertyTableNumber(AbstractEntityPersister.java:1468)
at org.hibernate.persister.entity.BasicEntityPropertyMapping.toColumns(BasicEntityPropertyMapping.java:62)
at org.hibernate.persister.entity.AbstractEntityPersister.toColumns(AbstractEntityPersister.java:1443)
at org.hibernate.persister.entity.JoinedSubclassEntityPersister.toColumns(JoinedSubclassEntityPersister.java:555)
at org.hibernate.loader.criteria.CriteriaQueryTranslator.getColumns(CriteriaQueryTranslator.java:477)
at org.hibernate.loader.criteria.CriteriaQueryTranslator.getColumnsUsingProjection(CriteriaQueryTranslator.java:437)
at org.hibernate.criterion.SimpleExpression.toSqlString(SimpleExpression.java:68)
at org.hibernate.loader.criteria.CriteriaQueryTranslator.getWhereCondition(CriteriaQueryTranslator.java:377)
at org.hibernate.loader.criteria.CriteriaJoinWalker.<init>(CriteriaJoinWalker.java:114)
at org.hibernate.loader.criteria.CriteriaJoinWalker.<init>(CriteriaJoinWalker.java:83)
at org.hibernate.loader.criteria.CriteriaLoader.<init>(CriteriaLoader.java:91)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1687)
at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:347)
at test.Test.main(Test.java:48)
我的疑惑是，criteria条件查询的时候所查的字段应该和HQL查询是一致的吧？那么HQL查询的时候，login字段都没问题，为什么换了Criteria之后login就无法访问了呢？
大家帮忙看看，谢谢谢谢！！

[fengyang00]

整个类如下：
package test;

import java.util.List;

import models.HibernateUtil;
import models.Libraryadmin;
import models.Reader;

import org.hibernate.Criteria;
import org.hibernate.criterion.Restrictions;

import actions.reader.ReaderLogin;

public class Test {

/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
System.out.println(ReaderLogin.class+" is called");
try{
HibernateUtil.getSession().beginTransaction();

Criteria criteria = HibernateUtil.getSession().createCriteria(Reader.class);
String username="xiyangyang";
criteria.add(Restrictions.eq("login", "xiyangyang"));
List list = criteria.list();
Reader reader =(Reader) list.get(0);
System.out.println(reader.getName());
}catch(Exception e){
e.printStackTrace();
}finally{
HibernateUtil.getSession().close();
}
}

}

[公众号【架构师也是人】]

关注。。

[dickli1986]

看一下你的Reader类，有没有getter和setter这个login属性

[fengyang00]

已经解决了，
criteria.add(Restrictions.eq("login", username));
这一句把"login"换成"Login"就好了，hql查询没问题是因为hql语言不分大小写呢。。。谢谢楼上两位关注