ClassCastException:org。冬眠impl。SessionImpl无法强制转换到引擎。spi。SessionImplementor

Question

在通过POST addUser方法将表单提交给UserController时，将调用该方法，但在其第2行

 userService.addEmployee(user);

发生异常stacktrace为

组织。springframework。网状物util。NestedServletException:请求处理失败；嵌套的异常是org。springframework。交易CannotCreateTransactionException:无法为事务打开Hibernate会话；嵌套的异常是java。lang.ClassCastException:org。冬眠impl。SessionImpl无法强制转换为组织。冬眠发动机spi。SessionImplementor组织。springframework。网状物servlet。FrameworkServlet。processRequest（FrameworkServlet.java:894）org。springframework。网状物servlet。FrameworkServlet。doPost（FrameworkServlet.java:789）javax。servlet。http。HttpServlet。服务（HttpServlet.java:710）javax。servlet。http。HttpServlet。服务（HttpServlet.java:803）

根本原因

com.example.model.User@7544ae20Feb 26,2015 4:51:02 PMorg.apache.catalina.core.Standard WrapperValve调用SEVERE： Servlet.service（）对于servlet调度Servlet抛出异常java.lang.ClassCastExcture：org.hibernate.impl.SessionImpl不能强制转换为<--plhd-org.springframework.orm.hibernate4.HibernateTransactionManager.do开始（HibernateTransactionManager.java:354）在org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction（AbstractPlatformTransactionManager.java:371）在org.springframework.transaction.interceptor.TransactionAupport.createTransactionIfNecessary（TransactionAupport.java:335）在org.springframework.transaction.interceptor.TransactionInterceptor.invoke（TransactionInterceptor.java:105）在org.springframework.aop.framework.Reflropemethod odInvocation.proceed（Reflropemethod odInvocation. java： 172）在org. springframework. aop. framework.jdkDynamicAopProxy. invoke（JdkDynamicAopProxy. java： 202）在com. sun. proxy。$Proxy17. add雇员（未知来源）在com. list. Controler。UserController. addUser（UserController. java： 33）在sun.反射。nativemethod odAccessorImp. invke0（本机方法）在sun.反射。nativeMEDAccessorInp. invoke（NativeMEDAccessorInp. java： 57）在sun. reff。在java. lang.反射中调用（委托方法访问或执行. java： 43）。在org. springframework. web. method. support上调用（method. java： 606）。在org. springframework. web. method. support上调用（InvocableHandlerWay. java： 213）。在org. springframework. web. servlet. mvc. method. annote上的InvocableHandlerWay. InvocableHandlermethod.在org. springframework. web. servlet. mvc. method.注解中，ServletInvocableHandlerWay. invkeAndHandle（ServletInvocableHandlermethod. java： 96）。在org. springframework. web. servlet. mvc. method.注释中请求MappingHandlerAdapter。在org. springframework. web. servlet. mvc. method.中，请求MappingHandlerAdapter. handle内部（请求MappingHandlerAdapter. java： 578）。在org. springframework. web. servlet中处理（AbstractHandlerMEDAdapter. java： 80）。在org. springframework. web. servlet上发送（DispatcherServlet. java： 923）。DispatcherServlet. doService（DispatcherServlet. java： 852）在org. springframework. web. servlet。在org. springframework. web. servlet上的FrameworkServlet.过程请求（FrameworkServlet. java： 882）。doPost（FrameworkServlet. java： 789）在javax. servlet. http.服务（HttpServlet. java： 710）在javax. servlet. http.服务（HttpServlet. java： 803）在org. apache. catalina. core。在org. apache. catalina. core上的Application ationFilterChain. interalDoFilter（Application ationFilterChain. java： 290）。在org. apache. catalina. core上的Application ationFilterChain. doFilter（Application ationFilterChain. java： 206）。在org. apache. catalina. core上调用（标准WrapperValve. java： 230）。在org. apache. catalina. core上调用（Standard ContextValve. java： 175）。在org. apache. catalina. valves. invoke（Standard HostValve. java： 128）。在org. apache. catalina. core上调用（ErrorReportValve. java： 104）。在org. apache. catalina.连接器上调用标准工程师。coyoteAdapter. service（CoyoteAdapter. java： 261）在org. apache. coyot. http 11.进程（Http11Processor. java： 844）在org. apache. coyot. http 11.http：//www. org. apache. tomcat. util. net的处理程序（http：//www. ttp11ConnectionHandler. org. apache. tomcat. util. net.JIoEndpoint$Worker. run（JIoEndpoint. java： 447）at java. lang.线程.运行（线程. java： 744）

用户控制器

@Controller
@RequestMapping("/users")
public class UserController {

@Autowired
UserService userService;

@RequestMapping(method = RequestMethod.GET, params = "new")
public String addUser(Model model) {
    model.addAttribute(new User());
    return "users/edit";
}

@RequestMapping(method = RequestMethod.POST)
public String addUser(User user, BindingResult bindingResult) {
    System.out.println(user);
    userService.addEmployee(user);
    System.out.println(user);
    return "redirect:/users/" + user.getEmpName();
}
}

UserServiceImpl

@Service("employeeService")
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true)
public class UserServiceImpl implements UserService {

@Autowired
private UserDao userDao;

@Transactional(propagation = Propagation.REQUIRED, readOnly = false)
public void addEmployee(User employee) {
    userDao.addEmployee(employee);
}

public List<User> listEmployeess() {
    return userDao.listEmployeess();
}

public User getEmployee(int empid) {
    return userDao.getEmployee(empid);
}

public void deleteEmployee(User employee) {
    userDao.deleteEmployee(employee);
}

}

Spring配置文件为

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
    http://www.springframework.org/schema/beans     
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/mvc 
    http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"
xmlns:tx="http://www.springframework.org/schema/tx">

<context:component-scan base-package="com.example" />

<bean
    class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix">
        <value>/WEB-INF/pages/</value>
    </property>
    <property name="suffix">
        <value>.jsp</value>
    </property>
</bean>

<mvc:resources mapping="/**" location="/resources/" />

<mvc:annotation-driven />

<context:property-placeholder location="classpath:resources/database.properties" />

<tx:annotation-driven transaction-manager="hibernateTransactionManager" />

<bean id="dataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="${database.driver}" />
    <property name="url" value="${database.url}" />
    <property name="username" value="${database.user}" />
    <property name="password" value="${database.password}" />
</bean>
<bean id="sessionFactory"
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="annotatedClasses">
        <list>
            <value>com.example.model.User</value>
        </list>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">${hibernate.dialect}</prop>
            <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
            <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
        </props>
    </property>
</bean>

<bean id="hibernateTransactionManager"
    class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

刀

 @Repository
 public class UserDaoImpl implements UserDao {

private SessionFactory sessionFactory;

@Autowired
public UserDaoImpl(SessionFactory sessionFactory) {
    this.sessionFactory = sessionFactory;
}

public void addEmployee(User employee) {
    sessionFactory.getCurrentSession().saveOrUpdate(employee);
}

@SuppressWarnings("unchecked")
public List<User> listEmployeess() {
    return (List<User>) sessionFactory.getCurrentSession()
            .createCriteria(User.class).list();
}

public User getEmployee(int empid) {
    return (User) sessionFactory.getCurrentSession().get(User.class, empid);
}

public void deleteEmployee(User employee) {
    sessionFactory
            .getCurrentSession()
            .createQuery(
                    "DELETE FROM Employee WHERE empid = "
                            + employee.getEmpId()).executeUpdate();
}

}

模型

@Entity
 @Table(name="User")
 public class User implements Serializable{

private static final long serialVersionUID = -723583058586873479L;

@Id
@GeneratedValue(strategy=GenerationType.AUTO)
@Column(name = "empid")
private Integer empId;

@Column(name="empname")
private String empName;

@Column(name="empaddress")
private String empAddress;

@Column(name="salary")
private Long salary;

@Column(name="empAge")
private Integer empAge;

public Integer getEmpId() {
    return empId;
}

public void setEmpId(Integer empId) {
    this.empId = empId;
}

public String getEmpName() {
    return empName;
}

public void setEmpName(String empName) {
    this.empName = empName;
}

public String getEmpAddress() {
    return empAddress;
}

public void setEmpAddress(String empAddress) {
    this.empAddress = empAddress;
}

public Long getSalary() {
    return salary;
}

public void setSalary(Long salary) {
    this.salary = salary;
}

public Integer getEmpAge() {
    return empAge;
}

public void setEmpAge(Integer empAge) {
    this.empAge = empAge;
}

}

为什么这个例外会到来。请解释一下。

提前谢谢。

Answer 1

问题是中的Spring配置文件

正在更改为hibernate4新配置文件。

Spring配置文件为

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
    http://www.springframework.org/schema/beans     
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/mvc 
    http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"
xmlns:tx="http://www.springframework.org/schema/tx">

<context:component-scan base-package="com.example" />

<bean
    class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix">
        <value>/WEB-INF/pages/</value>
    </property>
    <property name="suffix">
        <value>.jsp</value>
    </property>
</bean>

<mvc:resources mapping="/**" location="/resources/" />

<mvc:annotation-driven />

<bean id="propertyConfigurer"
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations">
        <list>
            <value>/WEB-INF/properties/database.properties</value>
        </list>
    </property>
</bean>

<bean id="dataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="${jdbc.driver}" />
    <property name="url" value="${jdbc.url}" />
    <property name="username" value="${jdbc.user}" />
    <property name="password" value="${jdbc.password}" />
</bean>

<bean id="sessionFactory"
    class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="packagesToScan" value="com.example.model" />
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">${hibernate.dialect}</prop>
            <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
            <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
        </props>

    </property>
</bean>


<tx:annotation-driven transaction-manager="transactionManager" />

<bean id="transactionManager"
    class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="sessionFactory" />
</bean>

Answer 2

您使用的是哪个版本的Spring？

为什么HibernateTransactionManager和AnnotationSessionFactoryBean来自不同的包？

你可以从同一个包装使用和尝试。