是这样的,我运行JSP环境是这样的:Apache Tomcat/5.0.28、j2sdk1.4.2_04,SQL Server 2000、Microsoft SQL Server 2000 Driver for JDBC并且将其中的三个文件(msbase.jar、msutil.jar、mssqlserver.jar)复制到\Tomcat 5.0\common\lib下,然后运行JSP,结果报错
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: javax/servlet/http/HttpServletRequest
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.install_jsp._jspService(install_jsp.java:1252)
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)
root cause
java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest
net.acai.util.ParamUtil.getString(ParamUtil.java:16)
net.acai.util.ParamUtil.getString(ParamUtil.java:23)
org.apache.jsp.install_jsp._jspService(install_jsp.java:74)
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)
note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.
不知道是什么原因，我的环境变量也设定过啊，与servlet有关吗？哪又该怎么设定呢？我用的tomcat 5.0.28,
有没有谁知道可能的原因，谢谢你们？困扰我一段时间了。
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程序源码也贴出来吧.
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错误信息是在说找不到ParamUtil的方法 ..看看import里面是不是写错了
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楼主看你报的异常了吗，NoClassDefFoundError 仔细看看 是不是有包没导入？还是用了根本没定义的类？
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java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest
找不到：javax.servlet.http.HttpServletRequest类。
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检查一下你的servlet.jar jsper-runtime.jar jsper-compile.jar是否导入
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环境变量里有加servlet.java吗？
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