ssh项目 com.mchange.v2.c3p0.impl.NewProxyPreparedStatement不能转换为 java.sql.CallableS

[zxf2790156325]

本人第一次做ssh项目，面对这些不常见的异常有点摸不着头脑，希望大神们解答，谢谢！

Exception in thread "Timer-0" java.lang.ClassCastException: com.mchange.v2.c3p0.impl.NewProxyPreparedStatement cannot be cast to java.sql.CallableStatement
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:75)
at org.hibernate.loader.Loader.getResultSet(Loader.java:2066)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1863)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1839)
at org.hibernate.loader.Loader.doQuery(Loader.java:910)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:355)
at org.hibernate.loader.Loader.doList(Loader.java:2554)
at org.hibernate.loader.Loader.doList(Loader.java:2540)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2370)
at org.hibernate.loader.Loader.list(Loader.java:2365)
at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:497)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:387)
at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:236)
at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1300)
at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103)
at cn.it.shop.service.impl.CategoryServiceImpl.queryByHot(CategoryServiceImpl.java:47)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:302)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:208)
at com.sun.proxy.$Proxy29.queryByHot(Unknown Source)
at cn.it.shop.utils.impl.ProductTimerTask.run(ProductTimerTask.java:41)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)

[tianfang]

貌似hibernate的问题，到5.2.8才解决，你的是什么版本 https://hibernate.atlassian.net/browse/HHH-10256

[tianfang]

数据库表字段和javaBean的映射有差异，如增加了字段，或者字段精度限制发生了变化

[zxf2790156325]

刚刚试了下，好像不是数据库表字段和javaBean的映射有差异，就从数据库取了两个User（只有id(int),username(varchar(20))）这两个字段，放到list里，还是报这个错误，请问还有别的解决办法吗？

[zxf2790156325]

引用 1 楼 tianfang 的回复:

数据库表字段和javaBean的映射有差异，如增加了字段，或者字段精度限制发生了变化

刚刚试了下，好像不是数据库表字段和javaBean的映射有差异，就从数据库取了两个User（只有id(int),username(varchar(20))）这两个字段，放到list里，还是报这个错误，请问还有别的解决办法吗？