求助 看看这段代码为什么不能执行啊？

yufeng0856

下面是我在会话bean写的一段代码                
                                sql="select * from patient where caseId like'"+no+"%';";
                Query query=em.createNativeQuery(sql);
                                Iterator iterator=list.iterator();
                Patient p=(Patient)iterator.next();

可是从iterator转换自己写的Patient类 总报下面的错误
Exception in thread "main" javax.ejb.EJBException: java.lang.ClassCastException: [Ljava.lang.Object;
        at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69)
        at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
        at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
        at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:102)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.stateful.StatefulContainer.dynamicInvoke(StatefulContainer.java:319)
        at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
        at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
        at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:828)
        at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:681)
        at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:358)
        at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:412)
        at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:239)
        at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:190)
        at org.jboss.remoting.Client.invoke(Client.java:525)
        at org.jboss.remoting.Client.invoke(Client.java:488)
        at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:41)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
        at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:46)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
        at org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:40)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
        at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:77)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:88)
        at org.jboss.ejb3.stateful.StatefulRemoteProxy.invoke(StatefulRemoteProxy.java:133)
        at $Proxy1.queryNo(Unknown Source)
        at org.hospital.test.SickTest.main(SickTest.java:29)
Caused by: java.lang.ClassCastException: [Ljava.lang.Object;
        at org.hospital.createcase.SickBean.queryNo(SickBean.java:30)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
        at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
        at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:57)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:46)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:79)
        at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)
        at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:102)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)
        at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
        at org.jboss.ejb3.stateful.StatefulContainer.dynamicInvoke(StatefulContainer.java:319)
        at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)
        at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82)
        at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:828)
        at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:681)
        at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:358)
        at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:412)
        at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:239)


那位能给我解答一下啊 多谢！！！！！！！

3992608

看不懂。。