我今天在HIBERNATE遇到一个奇怪的问题，当我尝试将对象保存到数据库时，它给了我java.lang.ClassCastException。
以下是错误的堆栈跟踪：
15:57:24,307 DEBUG AnnotationTransactionAttributeSource:106 - Adding transactional method 'createNombreConnexion' with attribute: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
15:57:24,307 DEBUG AnnotationTransactionAttributeSource:106 - Adding transactional method 'save' with attribute: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
15:57:24,682 ERROR stderr:71 - java.lang.ClassCastException: java.lang.Long cannot be cast to ma.dataprotect.sensipro.model.NombreConnexion
15:57:24,687 ERROR stderr:71 - at ma.dataprotect.sensipro.dao.impl.NombreConnexionDaoImpl.save(NombreConnexionDaoImpl.java:30)
15:57:24,687 ERROR stderr:71 - at ma.dataprotect.sensipro.dao.impl.NombreConnexionDaoImpl.save(NombreConnexionDaoImpl.java:1)
15:57:24,687 ERROR stderr:71 - at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
15:57:24,687 ERROR stderr:71 - at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
15:57:24,692 ERROR stderr:71 - at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
15:57:24,692 ERROR stderr:71 - at java.lang.reflect.Method.invoke(Method.java:498)
15:57:24,692 ERROR stderr:71 - at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
15:57:24,692 ERROR stderr:71 - at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
15:57:24,697 ERROR stderr:71 - at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
15:57:24,697 ERROR stderr:71 - at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
15:57:24,697 ERROR stderr:71 - at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
15:57:24,697 ERROR stderr:71 - at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
15:57:24,702 ERROR stderr:71 - at com.sun.proxy.$Proxy407.save(Unknown Source)
15:57:24,702 ERROR stderr:71 - at ma.dataprotect.sensipro.services.impl.NombreConnexionServiceImpl.createNombreConnexion(NombreConnexionServiceImpl.java:28)
15:57:24,702 ERROR stderr:71 - at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
15:57:24,702 ERROR stderr:71 - at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
15:57:24,707 ERROR stderr:71 - at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
15:57:24,707 ERROR stderr:71 - at java.lang.reflect.Method.invoke(Method.java:498)
15:57:24,707 ERROR stderr:71 - at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
15:57:24,707 ERROR stderr:71 - at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
15:57:24,712 ERROR stderr:71 - at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
15:57:24,712 ERROR stderr:71 - at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
15:57:24,712 ERROR stderr:71 - at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
15:57:24,712 ERROR stderr:71 - at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
15:57:24,712 ERROR stderr:71 - at com.sun.proxy.$Proxy410.createNombreConnexion(Unknown Source)
15:57:24,712 ERROR stderr:71 - at ma.dataprotect.sensipro.util.LoginBean.login(LoginBean.java:85)
15:57:24,712 ERROR stderr:71 - at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
15:57:24,712 ERROR stderr:71 - at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
15:57:24,717 ERROR stderr:71 - at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
15:57:24,717 ERROR stderr:71 - at java.lang.reflect.Method.invoke(Method.java:498)
15:57:24,717 ERROR stderr:71 - at com.sun.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:181)
15:57:24,717 ERROR stderr:71 - at com.sun.el.parser.AstValue.invoke(AstValue.java:289)
15:57:24,717 ERROR stderr:71 - at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
15:57:24,717 ERROR stderr:71 - at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
15:57:24,717 ERROR stderr:71 - at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
15:57:24,722 ERROR stderr:71 - at org.jboss.weld.util.el.ForwardingMethodExpression.invoke(ForwardingMethodExpression.java:40)
15:57:24,722 ERROR stderr:71 - at org.jboss.weld.el.WeldMethodExpression.invoke(WeldMethodExpression.java:50)
15:57:24,722 ERROR stderr:71 - at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
15:57:24,722 ERROR stderr:71 - at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
15:57:24,722 ERROR stderr:71 - at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
15:57:24,722 ERROR stderr:71 - at javax.faces.component.UICommand.broadcast(UICommand.java:315)
15:57:24,722 ERROR stderr:71 - at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
15:57:24,722 ERROR stderr:71 - at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
15:57:24,722 ERROR stderr:71 - at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
15:57:24,727 ERROR stderr:71 - at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
15:57:24,727 ERROR stderr:71 - at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
15:57:24,727 ERROR stderr:71 - at javax.faces.webapp.FacesServlet.service(FacesServlet.java:658)
15:57:24,727 ERROR stderr:71 - at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:85)
15:57:24,727 ERROR stderr:71 - at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)
15:57:24,727 ERROR stderr:71 - at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:78)
15:57:24,727 ERROR stderr:71 - at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)
15:57:24,727 ERROR stderr:71 - at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
15:57:24,732 ERROR stderr:71 - at ma.dataprotect.sensipro.util.FiltreUTF8.doFilter(FiltreUTF8.java:48)
15:57:24,732 ERROR stderr:71 - at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)
15:57:24,732 ERROR stderr:71 - at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
15:57:24,732 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
15:57:24,732 ERROR stderr:71 - at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
15:57:24,732 ERROR stderr:71 - at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
15:57:24,732 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,737 ERROR stderr:71 - at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
15:57:24,737 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,737 ERROR stderr:71 - at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
15:57:24,737 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,737 ERROR stderr:71 - at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
15:57:24,737 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,737 ERROR stderr:71 - at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:139)
15:57:24,737 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
15:57:24,742 ERROR stderr:71 - at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,742 ERROR stderr:71 - at org.springframework.security.web.access.channel.ChannelProcessingFilter.doFilter(ChannelProcessingFilter.java:144)
15:57:24,747 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
15:57:24,747 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
15:57:24,747 ERROR stderr:71 - at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
15:57:24,747 ERROR stderr:71 - at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
15:57:24,747 ERROR stderr:71 - at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
15:57:24,747 ERROR stderr:71 - at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)
15:57:24,747 ERROR stderr:71 - at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
15:57:24,747 ERROR stderr:71 - at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
15:57:24,747 ERROR stderr:71 - at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
15:57:24,747 ERROR stderr:71 - at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:60)
15:57:24,747 ERROR stderr:71 - at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:131)
15:57:24,747 ERROR stderr:71 - at io.undertow.servlet.handlers.FilterHandler.handleRequest(FilterHandler.java:84)
15:57:24,747 ERROR stderr:71 - at io.undertow.servlet.handlers.security.ServletSecurityRoleHandler.handleRequest(ServletSecurityRoleHandler.java:62)
15:57:24,747 ERROR stderr:71 - at io.undertow.servlet.handlers.ServletDispatchingHandler.handleRequest(ServletDispatchingHandler.java:36)
15:57:24,747 ERROR stderr:71 - at org.wildfly.extension.undertow.security.SecurityContextAssociationHandler.handleRequest(SecurityContextAssociationHandler.java:78)
15:57:24,747 ERROR stderr:71 - at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
15:57:24,747 ERROR stderr:71 - at io.undertow.servlet.handlers.security.SSLInformationAssociationHandler.handleRequest(SSLInformationAssociationHandler.java:131)
15:57:24,752 ERROR stderr:71 - at io.undertow.servlet.handlers.security.ServletAuthenticationCallHandler.handleRequest(ServletAuthenticationCallHandler.java:57)
15:57:24,752 ERROR stderr:71 - at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
15:57:24,752 ERROR stderr:71 - at io.undertow.security.handlers.AbstractConfidentialityHandler.handleRequest(AbstractConfidentialityHandler.java:46)
15:57:24,752 ERROR stderr:71 - at io.undertow.servlet.handlers.security.ServletConfidentialityConstraintHandler.handleRequest(ServletConfidentialityConstraintHandler.java:64)
15:57:24,752 ERROR stderr:71 - at io.undertow.security.handlers.AuthenticationMechanismsHandler.handleRequest(AuthenticationMechanismsHandler.java:60)
15:57:24,752 ERROR stderr:71 - at io.undertow.servlet.handlers.security.CachedAuthenticatedSessionHandler.handleRequest(CachedAuthenticatedSessionHandler.java:77)
15:57:24,752 ERROR stderr:71 - at io.undertow.security.handlers.NotificationReceiverHandler.handleRequest(NotificationReceiverHandler.java:50)
15:57:24,752 ERROR stderr:71 - at io.undertow.security.handlers.AbstractSecurityContextAssociationHandler.handleRequest(AbstractSecurityContextAssociationHandler.java:43)
15:57:24,752 ERROR stderr:71 - at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
15:57:24,752 ERROR stderr:71 - at org.wildfly.extension.undertow.security.jacc.JACCContextIdHandler.handleRequest(JACCContextIdHandler.java:61)
15:57:24,752 ERROR stderr:71 - at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
15:57:24,752 ERROR stderr:71 - at io.undertow.server.handlers.PredicateHandler.handleRequest(PredicateHandler.java:43)
15:57:24,752 ERROR stderr:71 - at io.undertow.servlet.handlers.ServletInitialHandler.handleFirstRequest(ServletInitialHandler.java:284)
15:57:24,752 ERROR stderr:71 - at io.undertow.servlet.handlers.ServletInitialHandler.dispatchRequest(ServletInitialHandler.java:263)
15:57:24,752 ERROR stderr:71 - at io.undertow.servlet.handlers.ServletInitialHandler.access$000(ServletInitialHandler.java:81)
15:57:24,752 ERROR stderr:71 - at io.undertow.servlet.handlers.ServletInitialHandler$1.handleRequest(ServletInitialHandler.java:174)
15:57:24,752 ERROR stderr:71 - at io.undertow.server.Connectors.executeRootHandler(Connectors.java:202)
15:57:24,757 ERROR stderr:71 - at io.undertow.server.HttpServerExchange$1.run(HttpServerExchange.java:793)
15:57:24,757 ERROR stderr:71 - at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
15:57:24,757 ERROR stderr:71 - at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
15:57:24,757 ERROR stderr:71 - at java.lang.Thread.run(Thread.java:745)
这是有问题的实体：
package ma.dataprotect.sensipro.model;
import static javax.persistence.GenerationType.IDENTITY;
import java.util.Date;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@SuppressWarnings("serial")
@Entity
@Table(name = "nombre_connexion")
public class NombreConnexion implements java.io.Serializable{
private Long id;
private Organism organism;
private Date dateConnexion;
private Long nombreConn;
public NombreConnexion() {
super();
// TODO Auto-generated constructor stub
}
public NombreConnexion(Organism organism, Date dateConnexion,
Long nombreConnexion) {
super();
this.organism = organism;
this.dateConnexion = dateConnexion;
this.nombreConn= nombreConnexion;
}
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "id", unique = true, nullable = false)
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
@ManyToOne(fetch = FetchType.EAGER)
@JoinColumn(name = "id_organism", nullable = false)
public Organism getOrganism() {
return organism;
}
public void setOrganism(Organism organism) {
this.organism = organism;
}
@Temporal(TemporalType.DATE)
@Column(name = "date_connexion", unique=true, nullable = false)
public Date getDateConnexion() {
return dateConnexion;
}
public void setDateConnexion(Date dateConnexion) {
this.dateConnexion = dateConnexion;
}
@Column(name = "nombre_connexion", nullable = false)
public Long getNombreConn() {
return nombreConn;
}
public void setNombreConn(Long nombreConn) {
this.nombreConn = nombreConn;
}
}
通用保存方法：
@SuppressWarnings("unchecked")
public T save(T t) {
return (T) getSessionFactory().getCurrentSession().save(t);
}
生成问题的代码：
nombreConnexion = new NombreConnexion();
nombreConnexion.setOrganism(user.getOrganism());
nombreConnexion.setDateConnexion(new Date());
nombreConnexion.setNombreConn((long) 1);
System.out.println(nombreConnexion);
nombreConnexionService.createNombreConnexion(nombreConnexion);
已编辑：nombreConnexionServiceImpl.createNombreConnexion（nombreConnexion）的代码[没什么重要！]
public void createNombreConnexion(NombreConnexion nombreConnexion) {
nombreConnexionDao.save(nombreConnexion);
}
编辑2（我希望这会有所帮助）：我将id的类型更改为Integer，现在错误是：
16:30:46,818 ERROR stderr:71 - java.lang.ClassCastException: java.lang.Integer cannot be cast to ma.dataprotect.sensipro.model.NombreConnexion
我们正在使用春天和冬眠，一切都很好，我不明白可能是什么问题。
答案 0 :(得分：4)
Hibernate会话的save（）方法返回的Serializable对象是对象的ID（＆＃34;生成的标识符＆＃34;），而不是对象本身。因此，保存方法中的转换为（T）失败。更改返回类型或返回保存的对象。