一个总是出错的JavaEE小项目，大神看看吧

java?ee login 这是applicationContext.xml文件： <?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:p=”http://www.springframework.org/schema/p” xsi:schemaLocation=”http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd”> <bean id=”dataSource” class=”org.apache.commons.dbcp.BasicDataSource”> <property name=”driverClassName” value=”com.mysql.jdbc.Driver”> </property> <property name=”url” value=”jdbc:mysql://localhost:3306/exam”> </property> <property name=”username” value=”root”></property> <property name=”password” value=”1111″></property> </bean> <bean id=”sessionFactory” class=”org.springframework.orm.hibernate3.LocalSessionFactoryBean”> <property name=”dataSource”> <ref bean=”dataSource” /> </property> <property name=”hibernateProperties”> <props> <prop key=”hibernate.dialect”> org.hibernate.dialect.MySQLDialect </prop> </props> </property> <property name=”mappingResources”> <list> <value>model/User.hbm.xml</value> </list> </property> </bean> <bean id=”baseDAO” class=”dao.BaseDAO”> <property name=”sessionFactory”> <ref bean=”sessionFactory”/> </property> </bean> <bean id=”userDao” class=”dao.impl.UserDAO” parent=”baseDAO”> </bean> <bean id=”userService” class=”service.impl.UserService”> <property name=”userDAO” ref=”userDAO”/> </bean> <bean id=”login” class=”action.LoginAction”> </bean> </beans> model包下：User.hbm.xml: <?xml version=”1.0″?> <!DOCTYPE hibernate-mapping PUBLIC “-//Hibernate/Hibernate Mapping DTD 3.0//EN” “http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd”> <hibernate-mapping> <class name=”model.User” table=”PeopleUser” catalog=”exam”> <id name=”id” type=”java.lang.Integer”> <column name=”id” /> <generator class=”native”></generator> </id> <property name=”username” type=”java.lang.String”> <column name=”uname” length=”10″ not-null=”true” /> </property> <property name=”password” type=”java.lang.String”> <column name=”pwd” length=”10″ not-null=”true” /> </property> <property name=”rolename” type=”java.lang.String”> <column name=”rolename” length=”10″ not-null=”true” /> </property> <property name=”tel” type=”java.lang.String”> <column name=”tel” length=”15″ not-null=”true” /> </property> </class> </hibernate-mapping> User.java: package model; @SuppressWarnings(“serial”) public class User implements java.io.Serializable { private Integer id; private String username; private String password; private String rolename; private String tel; public User(){ } public User(String username,String password){ this.username=username; this.password=password; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } 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 getRoleName() { return rolename; } public void setRoleName(String rolename){ this.rolename = rolename; } public String getTel() { return tel; } public void setTel(String tel) { this.tel = tel; } } dao.impl包下文件： package dao.impl; import java.util.List; import org.hibernate.Query; import org.hibernate.Session; import dao.BaseDAO; import dao.IUserDAO; import model.User; public class UserDAO extends BaseDAO implements IUserDAO { @SuppressWarnings(“rawtypes”) @Override public User validateUser(String username, String password) { String hql=”FROM User u WHERE u.username=? AND u.password=?”; Session session=getSession(); Query query=session.createQuery(hql); query.setParameter(0, username); query.setParameter(1, password); List users=query.list(); if (users.size()>0) { User user=(User)users.get(0); return user; } session.close(); return null; } } 总报错，怎么回事啊？
#1	把出的错误贴出来
#2	六月 15, 2015 11:30:34 下午 org.springframework.web.context.ContextLoader initWebApplicationContext 严重: Context initialization failed org.springframework.beans.factory.BeanCreationException: Error creating bean with name “”sessionFactory”” defined in ServletContext resource [/WEB-INF/classes/applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1444) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:518) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:455) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:567) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:381) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4728) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5162) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer] at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:108) at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:133) at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.<init>(EntityEntityModeToTuplizerMapping.java:80) at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:322) at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:485) at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:133) at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84) at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:286) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1872) at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:860) at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:779) at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1503) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1441) … 21 more Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:105) … 34 more Caused by: org.hibernate.PropertyNotFoundException: Could not find a getter for username in class model.User at org.hibernate.property.BasicPropertyAccessor.createGetter(BasicPropertyAccessor.java:326) at org.hibernate.property.BasicPropertyAccessor.getGetter(BasicPropertyAccessor.java:320) at org.hibernate.mapping.Property.getGetter(Property.java:304) at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:297) at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:155) at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:77) … 39 more 六月 15, 2015 11:30:34 下午 org.apache.catalina.core.StandardContext listenerStart 严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanCreationException: Error creating bean with name “”sessionFactory”” defined in ServletContext resource [/WEB-INF/classes/applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1444) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:518) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:455) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:567) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464) at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:381) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4728) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5162) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer] at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:108) at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:133) at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.<init>(EntityEntityModeToTuplizerMapping.java:80) at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:322) at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:485) at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:133) at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84) at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:286) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1872) at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newSessionFactory(LocalSessionFactoryBean.java:860) at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:779) at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1503)
#3	<property name=”url” value=”jdbc:mysql://localhost:3306/exam”> 你看看确定是l(L,小写)不是I(i,大写)
50分 #4	你user类的get/set方法错了，比你你的username的get/set方法应该是 public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } 这东西不要自己写，用eclipse自动生成
#5	啊，多谢高手的意见，解决了问题。我们这学期才学这个，所以总犯错。
#6	楼上有理，大小写错误