nested exception is java.lang.ClassCastException：XXX cannot be cast to java.io.Serializable

Type Exception ReportMessage Request processing failed; nested exception is java.lang.ClassCastException: cn.com.ecict.bean.UserBean cannot be cast to java.io.SerializableDescription The server encountered an unexpected condition that prevented it from fulfilling the request.Exceptionorg.springframework.web.util.NestedServletException: Request processing failed; nested exception is java.lang.ClassCastException: cn.com.ecict.bean.UserBean cannot be cast to java.io.Serializable    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:982)    org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)    javax.servlet.http.HttpServlet.service(HttpServlet.java:661)    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)    javax.servlet.http.HttpServlet.service(HttpServlet.java:742)    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)Root Causejava.lang.ClassCastException: cn.com.ecict.bean.UserBean cannot be cast to java.io.Serializable    org.hibernate.type.ManyToOneType.hydrate(ManyToOneType.java:179)    org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2844)    org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1741)    org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1667)    org.hibernate.loader.Loader.getRow(Loader.java:1556)    org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:740)    org.hibernate.loader.Loader.processResultSet(Loader.java:985)    org.hibernate.loader.Loader.doQuery(Loader.java:943)    org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:349)    org.hibernate.loader.Loader.doList(Loader.java:2615)    org.hibernate.loader.Loader.doList(Loader.java:2598)    org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2430)    org.hibernate.loader.Loader.list(Loader.java:2425)    org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:502)    org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:379)    org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:216)    org.hibernate.internal.SessionImpl.list(SessionImpl.java:1488)    org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1445)    org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1414)    cn.com.ecict.dao.impl.BaseDaoImpl.find(BaseDaoImpl.java:63)    cn.com.ecict.dao.impl.ContainerDaoImpl.getContainerList(ContainerDaoImpl.java:24)    cn.com.ecict.service.impl.ContainerServiceImpl.getContainerList(ContainerServiceImpl.java:98)    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    java.lang.reflect.Method.invoke(Method.java:498)    org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333)    org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)    org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)    org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282)    org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)    org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)    org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)    com.sun.proxy.$Proxy33.getContainerList(Unknown Source)    cn.com.ecict.controller.ContainerController.getContainerList(ContainerController.java:48)    sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)    sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    java.lang.reflect.Method.invoke(Method.java:498)    org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)    org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)    org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)    org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)    org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)    org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)    org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)    org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)    org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)    javax.servlet.http.HttpServlet.service(HttpServlet.java:661)    org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)    javax.servlet.http.HttpServlet.service(HttpServlet.java:742)    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)    org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)    org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)Note The full stack trace of the root cause is available in the server logs.

解决办法：
修改实体类UserBean，实现Serializable接口即可。

@Entity@Table(name="users")public class UserBean implements Serializable {    @Id    @GeneratedValue(strategy = GenerationType.IDENTITY)    private Integer  uid;    //该字段不更新    @Column(updatable=false)    private String   username;    private String   password;    private String   email;    private Integer  usertype;    private String   identity;    @Temporal(TemporalType.TIMESTAMP)    @Column(name = "lastlog")    private Date     lastlog;    private Integer  status;    public UserBean(){}    public UserBean(Integer uid, String username, String password, String email, Integer usertype, Date lastlog) {        this.uid = uid;        this.username = username;        this.password = password;        this.email = email;        this.usertype = usertype;        this.lastlog = lastlog;    }    @Override    public String toString() {        return "UserBean{" +                "uid=" + uid +                ", username='" + username + '\'' +                ", password='" + password + '\'' +                ", email='" + email + '\'' +                ", usertype=" + usertype +                ", lastlog=" + lastlog +                '}';    }    public Integer getUid() {        return uid;    }    public void setUid(Integer uid) {        this.uid = uid;    }    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    public String getEmail() {        return email;    }    public void setEmail(String email) {        this.email = email;    }    public Integer getUsertype() {        return usertype;    }    public void setUsertype(Integer usertype) {        this.usertype = usertype;    }    public Date getLastlog() {        return lastlog;    }    public void setLastlog(Date lastlog) {        this.lastlog = lastlog;    }    public Integer getStatus() {        return status;    }    public void setStatus(Integer status) {        this.status = status;    }    public String getIdentity() {        return identity;    }    public void setIdentity(String identity) {        this.identity = identity;    }}