org.apache.catalina.util.DefaultAnnotationProcessor cannot be cast to org.apache
type Exception reportmessage
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: java.lang.ClassCastException: org.apache.catalina.util.DefaultAnnotationProcessor cannot be cast to org.apache.AnnotationProcessor
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:156)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
util.TomcatFormFilter.doFilter(TomcatFormFilter.java:86)
root cause
java.lang.ClassCastException: org.apache.catalina.util.DefaultAnnotationProcessor cannot be cast to org.apache.AnnotationProcessor
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:146)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
util.TomcatFormFilter.doFilter(TomcatFormFilter.java:86)
修改tomcat的context配置文件
在<context></context>之间加下面的代码<Loader delegate="true" />
症状的原因网上的资料说是jar包冲突
即Tomcat中catalina.jar和jasper.jar都有AnnotationProcessor接口，所以运行时，就出错了：java.lang.ClassCastException: org.apache.catalina.util.DefaultAnnotationProcessor。
解决的方法如上，至于究竟是不是，现在还没考究！
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