java.lang.RuntimeException: Unable to create XMLReader org.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.SAXParser org.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
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