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  • 无法将另一个实体强制转换为javassist util代理

无法将另一个实体强制转换为javassist util代理

java gwt proxy

无法将另一个实体强制转换为javassist util代理,java,gwt,proxy,requestfactory,many-to-one,Java,Gwt,Proxy,Requestfactory,Many To One,下面的线程[entities无法转换为javassist.util.proxy.proxy，我现在确实有一个服务器端错误（tks） 我无法在我的应用程序中面对真正的问题 java.lang.ClassCastException: org.nit.persistance.entities.Manufacturers_.$$_javassist_3 cannot be cast to javassist.util.proxy.Proxy at org.hibernate.proxy.pojo

下面的线程[entities无法转换为javassist.util.proxy.proxy，我现在确实有一个服务器端错误（tks） 我无法在我的应用程序中面对真正的问题

java.lang.ClassCastException: org.nit.persistance.entities.Manufacturers_.$$_javassist_3 cannot be cast to javassist.util.proxy.Proxy
    at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:148)
    at org.hibernate.proxy.pojo.javassist.JavassistProxyFactory.getProxy(JavassistProxyFactory.java:73)
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:758)
    at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(AbstractEntityPersister.java:4419)
    at org.hibernate.event.internal.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:333)
    at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:259)
    at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:151)
    at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1017)
    at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:944)
    at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:671)
    at org.hibernate.type.EntityType.resolve(EntityType.java:489)
    at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:168)
    at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:137)
    at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1112)
    at org.hibernate.loader.Loader.processResultSet(Loader.java:969)
    at org.hibernate.loader.Loader.doQuery(Loader.java:917)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:348)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:318)
    at org.hibernate.loader.Loader.loadEntity(Loader.java:2143)
    at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:82)
    at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:72)
    at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3939)
    at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:461)
    at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:430)
    at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:207)
    at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:263)
    at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:151)
    at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1017)
    at org.hibernate.internal.SessionImpl.access$2000(SessionImpl.java:173)
    at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.load(SessionImpl.java:2413)
    at org.hibernate.internal.SessionImpl.get(SessionImpl.java:913)
    at org.nit.persistance.dao.impl.FichesImpl.readbyPK(FichesImpl.java:24)
    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:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
    at com.sun.proxy.$Proxy13.readbyPK(Unknown Source)
    at org.nit.server.CEM.CEMFiches.fetch(CEMFiches.java:52)
    at org.nit.server.service.FichesService.fetch(FichesService.java:11)
    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 com.google.web.bindery.requestfactory.server.ReflectiveServiceLayer.invoke(ReflectiveServiceLayer.java:182)
    at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.invoke(ServiceLayerDecorator.java:111)
    at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.invoke(ServiceLayerDecorator.java:111)
    at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.processInvocationMessages(SimpleRequestProcessor.java:463)
    at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process(SimpleRequestProcessor.java:233)
    at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process(SimpleRequestProcessor.java:135)
    at com.google.web.bindery.requestfactory.server.RequestFactoryServlet.doPost(RequestFactoryServlet.java:133)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:324)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
    at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)java.lang.ClassCastException: org.nit.persistance.entitesManufacturers_.$$_javassist_3 cannot be cast to javassist.util.proxy.Proxy
    at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.getProxy(JavassistLazyInitializer.java:148)
    at org.hibernate.proxy.pojo.javassist.JavassistProxyFactory.getProxy(JavassistProxyFactory.java:73)
    at org.hibernate.tuple.entity.AbstractEntityTuplizer.createProxy(AbstractEntityTuplizer.java:758)
    at org.hibernate.persister.entity.AbstractEntityPersister.createProxy(AbstractEntityPersister.java:4419)
    at org.hibernate.event.internal.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:333)
    at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:259)
    at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:151)
    at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1017)
    at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:944)
    at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:671)
    at org.hibernate.type.EntityType.resolve(EntityType.java:489)
    at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:168)
    at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:137)
    at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1112)
    at org.hibernate.loader.Loader.processResultSet(Loader.java:969)
    at org.hibernate.loader.Loader.doQuery(Loader.java:917)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:348)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:318)
    at org.hibernate.loader.Loader.loadEntity(Loader.java:2143)
    at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:82)
    at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:72)
    at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3939)
    at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:461)
    at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:430)
    at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:207)
    at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:263)
    at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:151)
    at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1017)
    at org.hibernate.internal.SessionImpl.access$2000(SessionImpl.java:173)
    at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.load(SessionImpl.java:2413)
    at org.hibernate.internal.SessionImpl.get(SessionImpl.java:913)
    at org.nit.persistance.dao.impl.FichesImpl.readbyPK(FichesImpl.java:24)
    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:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
    at com.sun.proxy.$Proxy13.readbyPK(Unknown Source)
    at org.nit.server.CEM.CEMFiches.fetch(CEMFiches.java:52)
    at org.nit.server.service.FichesService.fetch(FichesService.java:11)
    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 com.google.web.bindery.requestfactory.server.ReflectiveServiceLayer.invoke(ReflectiveServiceLayer.java:182)
    at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.invoke(ServiceLayerDecorator.java:111)
    at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.invoke(ServiceLayerDecorator.java:111)
    at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.processInvocationMessages(SimpleRequestProcessor.java:463)
    at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process(SimpleRequestProcessor.java:233)
    at com.google.web.bindery.requestfactory.server.SimpleRequestProcessor.process(SimpleRequestProcessor.java:135)
    at com.google.web.bindery.requestfactory.server.RequestFactoryServlet.doPost(RequestFactoryServlet.java:133)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:362)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:729)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:49)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:324)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
    at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:843)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
这部分是什么意思

at com.sun.proxy.$Proxy13.readbyPK(Unknown Source)
at org.nit.server.CEM.CEMFiches.fetch(CEMFiches.java:52)
at org.nit.server.service.FichesService.fetch(FichesService.java:11)
错误在制造商实体上，但我在Fiches上工作

  • Fiches通过与引用的多对一关系进行链接
  • 参考文献通过与产品的多对一关系进行链接
  • 产品通过与制造商的多对一关系联系在一起
我的代理人有问题吗

CEMFiches:（第52行是返回fichesDAO.readbyPK（fichesPK）；）

IfichesDAO是（@transactional被使用）

FichesImpl是

@Transactional(readOnly=true)
public Fiches readbyPK(FichesPK fichesPK){
    return (Fiches)getSessionFactory().getCurrentSession().get(Fiches.class, fichesPK);
}
FichesService：

public class FichesService
{
    public Fiches fetch(FichesPK id) { return CEMFiches.fetch(id); }
    public FichesPK fetchPK(FichesPK id) { return CEMFiches.fetchPK(id); }
    public Fiches fetch(String metier, String sitegeo, String cptdossier, Integer numligne) { return CEMFiches.fetch(metier, sitegeo, cptdossier, numligne); }


}
我遇到了同样的错误，奇怪的是，我的项目中的所有其他实体都运行正常，只有一个除外。根据蜘蛛Boris的建议，我检查了我的项目，发现有一个名为weld osgi bundle.jar的jar（在
Java EE 6
库中，由
myEclipse10.0提供）
包含一些可能与我的web库中的javassist-3.18.1-GA.jar
冲突的javassist代码。因此我删除了它，问题得到了解决。

在尝试使用Spring的@ResponseBy注释将实体呈现为JSON时，我也遇到了这个问题。问题原来是一个注释为@ManyToOne wi的关系这是一种抓取类型的懒惰。错误消息根本没有帮助。切换到急切抓取解决了问题

请注意，在我的例子中，目标实体还有一个递归的@ManyToOne关系（目标表本身有一个外键）这也被映射为懒惰。两种关系都必须切换为渴望解决问题。

因此我遇到了这个问题，我想我应该为那些可能有相同问题的人添加一些额外的细节

我有一组依赖项，其中一个导入了
org.javassist:javassist:3.18.1-GA
，而另一个导入了
javassist:javassist:3.11.0.GA

由于不同的组（似乎
javassist:javassist
变成了
org.javassist:javassist
），构建工具并没有将其中一个排除在外，而是将另一个排除在外，而我的WAR文件两者都有

我不得不手动排除旧的javassist依赖项，一旦它被删除，一切都很好。

您确定在类路径中有正确的javassist版本吗？当类路径上有两个版本并且它们进入一个飞行时，这种错误最常见。您应该在类路径上有一个带有
ver的javassist.jarsion>=3.16
@Boris TheSpider你完全正确！有了javassist-3.1和javassist-3.18.1-GA.jar，我确实按照你的建议删除了3.1，它工作得很好。非常感谢！对我也有帮助。复制发生在升级Spring和Hibernate之后。 
@Transactional(readOnly=true)
public Fiches readbyPK(FichesPK fichesPK){
    return (Fiches)getSessionFactory().getCurrentSession().get(Fiches.class, fichesPK);
}

public class FichesService
{
    public Fiches fetch(FichesPK id) { return CEMFiches.fetch(id); }
    public FichesPK fetchPK(FichesPK id) { return CEMFiches.fetchPK(id); }
    public Fiches fetch(String metier, String sitegeo, String cptdossier, Integer numligne) { return CEMFiches.fetch(metier, sitegeo, cptdossier, numligne); }


}