使用dom4j操作XML
用selectNodes()和selectSingleNode()就出错！
抛出的错误：
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java.lang.NoClassDefFoundError: org/jaxen/JaxenException
org.dom4j.DocumentFactory.createXPath(DocumentFactory.java:230)
org.dom4j.tree.AbstractNode.createXPath(AbstractNode.java:207)
org.dom4j.tree.AbstractNode.selectSingleNode(AbstractNode.java:183)
com.javgame.sys.XmlConfigFile.getDataBaseList(XmlConfigFile.java:172)
com.javgame.db.DateBaseList.initiation(DateBaseList.java:62)
com.javgame.db.DateBaseList. <init> (DateBaseList.java:48)
org.apache.jsp.db_jsp._jspService(db_jsp.java:56)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
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解决方法：
下载jaxen-1.1.1.jar ,导入就行。