Hibernate3.1问题-org.hibernate.persister.entity.AbstractEntityPersister.createProxy
用MyEclipse5 生成的hibernate3.1相关文件(xml+POJO+DAO)， 在执行DAO中方法时总提示如下错误，网上也找不到答案，知道的帮个忙
Exception in thread "Timer-0 " java.lang.NullPointerException
at org.hibernate.tuple.AbstractEntityTuplizer.createProxy(AbstractEntity
Tuplizer.java:372)
at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(Ab
stractEntityPersister.java:3121)
at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessa
ry(DefaultLoadEventListener.java:232)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultL
oadEventListener.java:173)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEv
entListener.java:87)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:862)
at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:830)
at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:266)
at org.hibernate.type.EntityType.resolve(EntityType.java:303)
at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:
116)
at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.j
ava:842)
at org.hibernate.loader.Loader.doQuery(Loader.java:717)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Lo
ader.java:224)
at org.hibernate.loader.Loader.doList(Loader.java:2145)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029)
at org.hibernate.loader.Loader.list(Loader.java:2024)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375)
at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.ja
va:308)
at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java
:153)
at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1106)
at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
at com.lihua.mailnews.hibernate.dao.OrderDAO.findByProperty(OrderDAO.jav
a:85)


相关代码：
OrderDAO oDao = new OrderDAO();
List orderList = oDao.findByOrderTime(new Integer(hour));
|
\|/
.
public List findByProperty(String propertyName, Object value) {

log.debug( "finding Order instance with property: " + propertyName
+ ", value: " + value);
try {
String queryString = "from com.lihua.mailnews.hibernate.model.Order as model where model. "
+ propertyName + "= ? ";
Query queryObject = getSession().createQuery(queryString);
queryObject.setParameter(0, value);
return queryObject.list();
} catch (RuntimeException re) {
log.error( "find by property name failed ", re);
throw re;
}
}
这些代码都是Myeclipse5生成的

[解决办法]
菜鸟学习中
[解决办法]
java.lang.NullPointerException 空指针异常吧...可能是什么你没查出来，又调用了...我也不知道，我也是菜鸟...
[解决办法]
findByProperty.java 文件 第85行报空指针
[解决办法]
queryObject.setParameter(0, value);
value 是 Object 类型吧
你的参数是什么类型的 没有指定吧
[解决办法]
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