弹簧&x2B；hibernate集成

我正在spring+hibernate集成上构建一个简单的应用程序，但它显示了以下错误：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/employee-servlet.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingException: Unable to load class [ com.howtodoinjava.entity.EmployeeEntity] declared in Hibernate configuration <mapping/> entry
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1512)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:521)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:296)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:293)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:610)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4797)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5291)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

hibernate.cfg.xml文件

<?xml version='1.0' encoding='utf-8'?>
<hibernate-configuration>
    <session-factory>
        <mapping class="com.howtodoinjava.entity.EmployeeEntity" />
    </session-factory>
</hibernate-configuration>

这条消息太笼统了。Spring在尝试部署时发现错误。你能完成错误消息吗？你能发布你的实体POJO吗？整个错误消息是org.springframework.beans.factory.BeanCreationException：创建名为“sessionFactory”的bean时出错，该bean在ServletContext资源[/WEB-INF/employee servlet.xml]中定义：调用init方法失败；嵌套异常为org.hibernate.MappingException:无法加载在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1512）的hibernate配置条目中声明的类[com.howtodoinjava.entity.EmployeeEntity]？

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:lang="http://www.springframework.org/schema/lang" xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation="http://www.springframework.org/schema/beans           http://www.springframework.org/schema/beans/spring-beans.xsd         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring- aop.xsd         http://www.springframework.org/schema/context    http://www.springframework.org/schema/context/spring-context.xsd         http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd         http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd         http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
    <context:annotation-config />
    <context:component-scan base-package="com.howtodoinjava.controller" />
    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/view/" />
        <property name="suffix" value=".jsp" />
    </bean>
    <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <property name="basename" value="classpath:messages" />
        <property name="defaultEncoding" value="UTF-8" />
    </bean>
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" p:location="/WEB-INF/jdbc.properties" />
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${jdbc.driverClassName}" p:url="${jdbc.databaseurl}" p:username="${jdbc.username}" p:password="${jdbc.password}" />
    <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="configLocation">
            <value>classpath:hibernate.cfg.xml</value>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">${jdbc.dialect}</prop>
                <prop key="hibernate.show_sql">true</prop>
            </props>
        </property>
    </bean>
    <bean id="employeeDAO" class="com.howtodoinjava.dao.EmployeeDaoImpl"></bean>
    <bean id="employeeManager" class="com.howtodoinjava.service.EmployeeManagerImpl"></bean>
    <tx:annotation-driven transaction-manager="transactionManager" />
    <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
</beans>

package com.howtodoinjava.entity;

import javax.persistence.*;

@Entity
@Table(name = "EMPLOYEE")
public class EmployeeEntity {

    @Id
    @Column(name = "ID")
    @GeneratedValue
    private Integer id;

    @Column(name = "FIRSTNAME")
    private String firstname;

    @Column(name = "LASTNAME")
    private String lastname;

    @Column(name = "EMAIL")
    private String email;

    @Column(name = "TELEPHONE")
    private String telephone;

    public String getEmail() {
        return email;
    }

    public String getTelephone() {
        return telephone;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public void setTelephone(String telephone) {
        this.telephone = telephone;
    }

    public String getFirstname() {
        return firstname;
    }

    public String getLastname() {
        return lastname;
    }

    public void setFirstname(String firstname) {
        this.firstname = firstname;
    }

    public void setLastname(String lastname) {
        this.lastname = lastname;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }
}

<?xml version='1.0' encoding='utf-8'?>
<hibernate-configuration>
    <session-factory>
        <mapping class="com.howtodoinjava.entity.EmployeeEntity" />
    </session-factory>
</hibernate-configuration>