使用userBeans一直报错

HTTP Status 500 – Internal Server Error

Type Exception Report

Message java.lang.ClassNotFoundException: org.apache.jsp.firstDemo_jsp

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

org.apache.jasper.JasperException: java.lang.ClassNotFoundException: org.apache.jsp.firstDemo_jsp
	org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:198)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:409)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

Root Cause

java.lang.ClassNotFoundException: org.apache.jsp.firstDemo_jsp
	java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	java.security.AccessController.doPrivileged(Native Method)
	java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:132)
	org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:63)
	org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:193)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:409)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

Note The full stack trace of the root cause is available in the server logs.

Apache Tomcat/7.0.96