org.hibernate.hql.ast.QuerySyntaxException: ? is not mapped

2010-5-3 21:48:23 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet action threw exception
org.hibernate.hql.ast.QuerySyntaxException: Toperator is not mapped [from Toperator t where t.operatorName='norya' and t.operatorPwd='111111']
 at org.hibernate.hql.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:158)
 at org.hibernate.hql.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:87)
 at org.hibernate.hql.ast.tree.FromClause.addFromElement(FromClause.java:70)
 at org.hibernate.hql.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:255)
 at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3056)
 at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:2945)
 at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:688)
 at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:544)
 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:228)
 at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:160)
 at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:111)
 at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:77)
 at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:56)
 at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:72)
 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:1623)
 at com.ssh.dao.impl.LoginDAOImpl.isOperator(LoginDAOImpl.java:38)
 at com.ssh.manager.impl.LoginManagerImpl.isOperator(LoginManagerImpl.java:24)
 at com.ssh.action.LoginAction.execute(LoginAction.java:51)
 at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
 at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
 at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
 at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
 at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
 at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
 at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
 at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
 at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
 at java.lang.Thread.run(Unknown Source)

 

 

问题原因：对HQL没有理解。它是面向对象的。

 

因为Hibernate是对类查询的 
在hql="from Toperator t where t.operatorName==:operatorName and t.operatorPwd=:operatorPwd";中, 
Toperator是数据库中的表,而Toperator对应的类是Operator.java,现在只需要将Toperator改为Operator就可以了,即 
hql="from operator t where t.operatorName==:operatorName and t.operatorPwd=:operatorPwd";