有个使用 Spring 的项目，运行时报错：
1 org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 5 in XML document from class path resource [applicationContext.xml] is invalid; nested exception is org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element ‘beans’. 2at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:404) 3at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:342) 4at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:310) 5at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143) 6at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178) 7at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149) 8at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:212) 9at org.springframework.test.AbstractSingleSpringContextTests.createApplicationContext(AbstractSingleSpringContextTests.java:212)10at org.springframework.test.AbstractSingleSpringContextTests.loadContextLocations(AbstractSingleSpringContextTests.java:189)11at org.springframework.test.AbstractSingleSpringContextTests.loadContext(AbstractSingleSpringContextTests.java:169)12at org.springframework.test.AbstractSpringContextTests.getContext(AbstractSpringContextTests.java:140)13at org.springframework.test.AbstractSingleSpringContextTests.setUp(AbstractSingleSpringContextTests.java:98)14at junit.framework.TestCase.runBare(TestCase.java:132)15at org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:76)16at junit.framework.TestResult$1.protect(TestResult.java:110)17at junit.framework.TestResult.runProtected(TestResult.java:128)18at junit.framework.TestResult.run(TestResult.java:113)19at junit.framework.TestCase.run(TestCase.java:124)20at junit.framework.TestSuite.runTest(TestSuite.java:243)21at junit.framework.TestSuite.run(TestSuite.java:238)22at org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)23at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)24at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)25at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)26at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)27at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)28at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)29 Caused by: org.xml.sax.SAXParseException: cvc-elt.1: Cannot find the declaration of element ‘beans’.30at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)31at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:131)32at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384)33at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318)34at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(XMLSchemaValidator.java:1887)35at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:685)36at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:400)37at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(XMLNSDocumentScannerImpl.java:626)38at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:3095)39at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:921)40at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)41at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)42at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)43at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)44at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)45at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)46at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:225)47at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:283)48at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:75)49at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:396)50… 26 more
该项目在另外一台机器上是可以运行的。
后来网上查了查，香港服务器，是bean文件的头有问题。引入的是 Spring 2.5 的包，但文件头却是用 Spring 3.0
原文件：
=”http://www.springframework.org/schema/beans
后来改成 Spring 2.5 包里某个例子的文件头，就可以运行了。
修改之后：
=”http://www.springframework.org/schema/beans 5 http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
主要差别在于这个属性的值 xsi:schemaLocation
？疑问
为什么同样的代码，在这个机器上可以运行，香港服务器，而在另外一台却不行呢？
¿ 猜想
两台机器最大的不同就是，一台可以联网，一台不行。
而相同的代码，之所以在可以联网那台机器上可以运行，是因为当本地找不到 xsd 文件时，香港空间，它会自动上网找。
又或者是后天的，我们不断学习，努力进取的路途中辛苦寻到的武器。
