高手们帮忙看看这是个什么错误了

我的tomcat和jdk这几天升级而导致许多程序发生错误，但是如果把该程序的文件夹改个名字就能用了，如果改成原来的就又不行了，估计是哪配制不对的原因

请高手们帮忙分析．再就是tomcat升级应注意些什么

报错如下：

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Unable to load class for JSP

org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:550)

org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:136)

org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:307)

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)

root cause

java.lang.ClassNotFoundException: org.apache.jsp.sms_005fuser_jsp