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

Type Exception Report

Message Request processing failed; nested exception is java.lang.ClassCastException: cn.com.ecict.bean.UserBean cannot be cast to java.io.Serializable

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.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 Cause

java.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.

@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;
    }
}