hibernate配置文件异常no grammar found

hibernate配置文件错误no grammar found.
当hibernate配置文件未带此类信息时
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
报
Document is invalid: no grammar found.
详细的异常栈如下
org.hibernate.MappingException: invalid configuration
        at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1579)
        at org.hibernate.cfg.Configuration.configure(Configuration.java:1520)
        at org.hibernate.cfg.Configuration.configure(Configuration.java:1506)
        at HibernateUtils.<clinit>(HibernateUtils.java:16)
        at HibernateTest.main(HibernateTest.java:9)
Caused by: org.xml.sax.SAXParseException: Document is invalid: no grammar found.
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown So
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootEle
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Sou
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
        at org.dom4j.io.SAXReader.read(SAXReader.java:465)
        at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1576)
        ... 4 more
Exception in thread "main" java.lang.ExceptionInInitializerError
        at HibernateUtils.<clinit>(HibernateUtils.java:21)
        at HibernateTest.main(HibernateTest.java:9)
Caused by: org.hibernate.MappingException: invalid configuration
        at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1579)
        at org.hibernate.cfg.Configuration.configure(Configuration.java:1520)
        at org.hibernate.cfg.Configuration.configure(Configuration.java:1506)
        at HibernateUtils.<clinit>(HibernateUtils.java:16)
        ... 1 more
Caused by: org.xml.sax.SAXParseException: Document is invalid: no grammar found.
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown So
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootEle
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Sou
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
        at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
        at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
        at org.dom4j.io.SAXReader.read(SAXReader.java:465)
        at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1576)
        ... 4 more