【SSH】Error creating bean with name 'sessionFactory' defined in class path resource [applicationConte

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  今天在小咸儿再一次学习SSH的时候，在进行用户名校验的时候，启动项目报了一个曾经遇到的错误：

  Error creating bean with name ‘sessionFactory’ defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.InvalidMappingException: Could not parse mapping document from input stream

  再一次遇到这个问题，而且一看到错误内容这么长，都不知道在哪里啊！直接就开始上网查。经过网上查找之后一位博主的话点醒了我，他说在error下面还有一句话，就是这个造成的这个错误的原因，同时也说明了解决方法：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.InvalidMappingException: Could not parse mapping document from input stream
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1486)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:524)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:589)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4738)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5181)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
    at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1101)
    at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1816)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)
Caused by: org.hibernate.InvalidMappingException: Could not parse mapping document from input stream
    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:4009)
    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXmlQueue(Configuration.java:3998)
    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3986)
    at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1398)
    at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1375)
    at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:720)
    at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:188)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1545)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1483)
    ... 25 more
Caused by: org.hibernate.PropertyNotFoundException: field [email] not found on cn.itcast.shop.user.vo.User
    at org.hibernate.property.DirectPropertyAccessor.getField(DirectPropertyAccessor.java:182)
    at org.hibernate.property.DirectPropertyAccessor.getField(DirectPropertyAccessor.java:174)
    at org.hibernate.property.DirectPropertyAccessor.getGetter(DirectPropertyAccessor.java:197)
    at org.hibernate.util.ReflectHelper.getter(ReflectHelper.java:241)
    at org.hibernate.util.ReflectHelper.reflectedPropertyClass(ReflectHelper.java:229)
    at org.hibernate.mapping.SimpleValue.setTypeUsingReflection(SimpleValue.java:316)
    at org.hibernate.cfg.HbmBinder.createProperty(HbmBinder.java:2297)
    at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2274)
    at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2164)
    at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:412)
    at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:326)
    at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:177)
    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processHbmXml(Configuration.java:4006)
    ... 33 more

  明显的可以看出，在第二个Caused by中：

  原来问题就是我在定义实体的时候忘记写入email的字段：

  添加上email字段后：启动成功！

  分享：

  在看到报了那么多错之后，一定要静下心来去看在错误的后面会有造成这个错误的原因，这样解决其问题就会很快。如果你被这么多的字打败了，看到字多就头疼，先畏惧了，那么你真的就错失掉最快发现解决方法的机会了。
今天的分享不在于解决了一个多么难的问题，而在于发现解决问题有多么简单。。