java.net.UnknownHostException: www.springframework.org

错误信息： 
2016-07-27 15:28:25 - [ INFO ] Loading XML bean definitions from file [D:\apache-tomcat-6.0.35\webapps\StandardEsm\WEB-INF\classes\applicationContext-timer.xml] 
2016-07-27 15:28:25 - [ ERROR ] Context initialization failed 
org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from file [D:\apache-tomcat-6.0.35\webapps\StandardEsm\WEB-INF\classes\applicationContext-timer.xml]; nested exception is java.net.UnknownHostException: www.springframework.org 
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:409) 
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:335) 
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:303) 
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:180)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:216)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:187)
at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125) 
at org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94) 
at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129)
at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:540) 
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:454) 
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403) 
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) 
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106) 
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206) 
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705) 
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799) 
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779) 
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601) 
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1079) 
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1002) 
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:506) 
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317) 
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324) 
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142) 
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065) 
at org.apache.catalina.core.StandardHost.start(StandardHost.java:840) 
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057) 
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463) 
at org.apache.catalina.core.StandardService.start(StandardService.java:525) 
at org.apache.catalina.core.StandardServer.start(StandardServer.java:754) 
at org.apache.catalina.startup.Catalina.start(Catalina.java:595) 
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
at java.lang.reflect.Method.invoke(Method.java:606) 
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) 
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414) 
Caused by: java.net.UnknownHostException: www.springframework.org 
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:178) 
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) 
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) 
at java.net.Socket.connect(Socket.java:579) 
at java.net.Socket.connect(Socket.java:528) 
at sun.net.NetworkClient.doConnect(NetworkClient.java:180) 
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432) 
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527) 
at sun.net.www.http.HttpClient.(HttpClient.java:211) 
at sun.net.www.http.HttpClient.New(HttpClient.java:308) 
at sun.net.www.http.HttpClient.New(HttpClient.java:326) 
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:997) 
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:933) 
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:851) 
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1301) 
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:643) 
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(XMLEntityManager.java:1297) 
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(XMLEntityManager.java:1264) 
at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(XMLDTDScannerImpl.java:263) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImplDTDDriver.dispatch(XMLDocumentScannerImpl.java:1164)atcom.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImplDTDDriver.next(XMLDocumentScannerImpl.java:1050)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:964) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606) 
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848) 
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777) 
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141) 
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243) 
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:347) 
at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:76) 
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadDocument(XmlBeanDefinitionReader.java:428) 
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390) 
… 37 more 
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原因：applicationContext-timer.xml中DOCTYPE声明引起的， 
找不到主机www.springframework.org，因为不能访问互联网，如下：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

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解决方法： 
将applicationContext-timer.xml中

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

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改成：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"  
    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-4.0.xsd">  

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修改以后程序正常。 
这是我替换jar包后出现的问题，替换前，没有问题，不知道是不是jar包问题。