org.xml.sax.SAXParseException: Document root element "beans", must match DOCTYPE root "null".

严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener

org.springframework.beans.factory.BeanDefinitionStoreException: Line 11 in XML document from ServletContext resource [/WEB-INF/applicationContext.xml] is invalid; nested exception is org.xml.sax.SAXParseException: Document root element "beans", must match DOCTYPE
root "null".

org.xml.sax.SAXParseException: Document root element "beans", must match DOCTYPE root "null".

at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)

at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)

at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)

at org.apache.xerces.impl.dtd.XMLDTDValidator.rootElementSpecified(Unknown Source)

at org.apache.xerces.impl.dtd.XMLDTDValidator.handleStartElement(Unknown Source)

at org.apache.xerces.impl.dtd.XMLDTDValidator.startElement(Unknown Source)

at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanStartElement(Unknown Source)

at org.apache.xerces.impl.XMLDocumentScannerImpl$ContentDispatcher.scanRootElementHook(Unknown Source)

at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)

at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)

at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)

at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)

at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)

at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:222)

at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:173)

at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:148)

at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:126)

at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:142)

at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:126)

at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94)

at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:89)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:269)

at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:134)

at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:246)

at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:184)

at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:49)

at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)

at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1284)

at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1382)

at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:306)

at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)

at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1389)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1653)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1662)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1642)

at java.lang.Thread.run(Unknown Source)

解决方法：

加上

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

去掉

<beans

xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

错误原因分析：

spring1.X使用DOCTYPE，而2.X版本使用schema。我们使用低版本的spring就要配置文件使用dtd解析方式，使用高版本的就要使用xsl解析方式。