我在WinXP JAVA+TOMCAT 平台上有一段.TestBean.java程序.已经通过编译了,并且生成了.CLASS文件。可是，在运行相应.JSP文件总是提示有错：
description
The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /source/jsp/chapter4/page.jsp(7,0) The value for the useBean class attribute chapter4.TestBean is invalid.
......
烦劳各位大虾指点一二！不甚感激！！谢谢！！