XmlReader 读取文件异常
java.lang.RuntimeException: Unable to create XMLReaderorg.jasig.cas.client.util.XmlUtils.getXmlReader(XmlUtils.java:44)org.jasig.cas.client.util.XmlUtils.getTextForElement(XmlUtils.java:116)org.jasig.cas.client.validation.Cas20ServiceTicketValidator.parseResponseFromServer(Cas20ServiceTicketValidator.java:69)org.jasig.cas.client.validation.AbstractUrlBasedTicketValidator.validate(AbstractUrlBasedTicketValidator.java:188)org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:132)org.jasig.cas.client.authentication.AuthenticationFilter.doFilter(AuthenticationFilter.java:102)org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:110)org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
root cause
java.lang.ClassNotFoundException: org.apache.xerces.parsers.SAXParserorg.xml.sax.helpers.XMLReaderFactory.loadClass(XMLReaderFactory.java:189)org.xml.sax.helpers.XMLReaderFactory.createXMLReader(XMLReaderFactory.java:150)org.jasig.cas.client.util.XmlUtils.getXmlReader(XmlUtils.java:42)org.jasig.cas.client.util.XmlUtils.getTextForElement(XmlUtils.java:116)org.jasig.cas.client.validation.Cas20ServiceTicketValidator.parseResponseFromServer(Cas20ServiceTicketValidator.java:69)org.jasig.cas.client.validation.AbstractUrlBasedTicketValidator.validate(AbstractUrlBasedTicketValidator.java:188)org.jasig.cas.client.validation.AbstractTicketValidationFilter.doFilter(AbstractTicketValidationFilter.java:132)org.jasig.cas.client.authentication.AuthenticationFilter.doFilter(AuthenticationFilter.java:102)org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:110)org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)是用的jar包是dom4j-1.6.1.jar是不是我的程序缺少jar包啊
